JP7117894B2 - Endoscope device, method for switching illumination optical system in endoscope device, program, and recording medium - Google Patents

Description

The present invention relates to an endoscope apparatus, a method for switching an illumination optical system in an endoscope apparatus, a program, and a recording medium. More specifically, the present invention relates to an endoscope device having optical path switching means, a method for determining switching of an optical system in an endoscope device, a program, and a recording medium.

Conventionally, in the medical and industrial fields, an elongated insertion section is inserted into a subject, and an image of the subject in the subject is captured by an imaging element provided in the tip located at the tip of the insertion section. Endoscopic devices are widely used. For example, in the medical field, an insertion section is inserted into a body cavity to observe organs in the body cavity, and various therapeutic treatments are performed using a treatment tool inserted through a treatment tool channel as necessary. For this purpose, a medical endoscope device is used. In the industrial field, for example, industrial endoscopes are used to observe and inspect internal flaws and corrosion of boilers, turbines, engines, chemical plants, and the like.

For example, in a gas turbine engine in a power plant, high-pressure turbine blades are exposed to high-pressure, high-temperature combustion air, and are susceptible to cracks due to thermal shock. Damage such as cracks in the blades is fatal to the engine. For this reason, inspection and inspection of high-pressure turbine blades using an industrial endoscope device is one of the most important items in performing maintenance of gas turbine engines. In the maintenance of gas turbine engines, the shape of the damage is measured during inspection of the blades, and based on the measurement results, it is determined whether or not to replace the blades.

By the way, in the examination using the endoscope apparatus as described above, the stereo measurement technique is widely used as a technique for performing measurement. Stereo measurement technology is a measurement technology that performs measurement based on a three-dimensional image generated using parallax between an image corresponding to the right eye and an image corresponding to the left eye of an object. For this reason, an endoscope apparatus that performs stereoscopic measurement is provided with two imaging lenses in the distal end portion, and has a configuration in which an image corresponding to a subject image formed by an optical system composed of the respective imaging lenses is formed by an imaging device. It has become.

At this time, the image of the subject image formed by the imaging lens corresponding to the right eye and the image of the subject image formed by the imaging lens corresponding to the left eye are captured by the imaging devices corresponding to the respective imaging lenses. In other words, with a configuration formed by two imaging elements, the distal end portion of the endoscope device cannot be made thin. Therefore, a configuration is conceivable in which the image of the subject image formed by the imaging lens corresponding to the right eye and the image of the subject image formed by the imaging lens corresponding to the left eye are formed by one imaging device. . However, in the case of this configuration, an image corresponding to the right eye and an image corresponding to the left eye are formed by dividing the entire imaging area of one imaging element, so the resolution of each image is low. As a result, it is conceivable that the measurement accuracy of stereo measurement in the endoscope apparatus will be lowered.

For this reason, for example, as in Patent Document 1, although the image corresponding to the right eye and the image corresponding to the left eye are formed by one image sensor, the resolution of each image is high. As a result, a technology for an endoscope device that improves the measurement accuracy of stereo measurement has been proposed. In the technique disclosed in Patent Document 1, the light from one of the optical paths of the two optical systems is time-divisionally shielded so that only the light from the other optical path enters one imaging device. A time-division optical path switching means is provided. In the technique disclosed in Patent Document 1, with this configuration, the light from the optical path that is not shielded forms an image on the entire imaging area of one imaging element, and the resolution of the image formed by the imaging element is increased. can be done.

In the technique disclosed in Patent Document 1, the light from the optical paths of the two optical systems is alternately made incident on the imaging device, thereby forming an image of the subject image formed by each optical system and performing stereo measurement. It can be performed. As a result, in the endoscope apparatus to which the technology disclosed in Patent Document 1 is applied, the resolution of each of the image corresponding to the right eye and the image corresponding to the left eye captured for stereo measurement is increased. As a result, it is possible to improve the measurement accuracy when measuring the subject in the test object.

JP 2010-128354 A

When observing a subject image with an endoscope device, it is required to observe with an appropriate light distribution. Specifically, bright observation without light loss, uniform illumination of the imaging area (imaging range), reduction of overexposure and flare, and the like are required. In the optical path switching type endoscope apparatus disclosed in Patent Document 1, when the optical paths of the two optical systems are switched, the optical path of the imaging optical system is switched, but the optical path of the illumination optical system is not switched.

The present invention has been made based on the recognition of the above problem, and in an optical path switching type endoscope apparatus, when the imaging optical system is switched, the light distribution (illumination optical system) is adjusted according to the imaging area. An object of the present invention is to provide an endoscope device capable of switching, a method for switching an illumination optical system in the endoscope device, a program, and a recording medium.

In order to solve the above problems, an endoscope apparatus according to one aspect of the present invention includes a scope unit having an imaging optical system and an illumination optical system, and a control unit, The illumination optical system is an illumination optical system having a configuration for changing the angle of illumination light, and the control section changes the configuration of the illumination optical system according to imaging conditions, and the light emitted from the distal end of the scope section changes the configuration of the illumination optical system. It is characterized by changing the illumination range of the illumination light.

According to one aspect of the present invention, in the endoscope apparatus described above, the first subject image of the subject formed by the light passing through the first imaging optical system and the light passing through the second imaging optical system are Only one of the first subject image and the second subject image is formed in an image forming area in which the second subject image of the subject to be formed is commonly formed. a first switching unit for switching an image optical system; and switching the first imaging optical system to the second imaging optical system, or switching the second imaging optical system to the first imaging optical system. and a switching unit driving unit that outputs a switching signal for switching to the first switching unit, and the control unit instructs the switching unit driving unit to output the switching signal, and instructs the switching unit driving unit to output the switching signal. As a result, based on the imaging optical system switched by the first switching unit among the imaging optical systems of the first imaging optical system and the second imaging optical system , It is characterized in that the illumination light emitted from the tip of the scope section is changed.

A method for switching an illumination optical system in an endoscope apparatus according to one aspect of the present invention is an endoscope apparatus including a scope section having an imaging optical system and an illumination optical system, and a control section. In the method, the illumination optical system is an illumination optical system having a configuration for changing an angle of illumination light, and the switching method changes the configuration of the illumination optical system according to an imaging condition, and the scope unit It is characterized by having a step of changing an illumination range of illumination light emitted from the tip.

A method for switching an illumination optical system in an endoscope apparatus according to one aspect of the present invention is an endoscope apparatus including: a scope section having an imaging optical system and an illumination optical system; and a control section. A method comprising: a first subject image of a subject formed by light passing through a first imaging optical system; and a second subject image of said subject formed by light passing through a second imaging optical system. a step of switching the imaging optical system so that only one of the first object image and the second object image is formed in an image forming area in which are commonly imaged; Based on the angle of view of the first imaging lens that constitutes one imaging optical system and the angle of view of the second imaging lens that constitutes the second imaging optical system, the light is emitted from the distal end of the scope section. and a step of changing the illumination light.

A program according to one aspect of the present invention is a program for controlling an endoscope apparatus comprising a scope unit having an imaging optical system and an illumination optical system, and a control unit, wherein the illumination optical system emits illumination light. The illumination optical system has a configuration for changing an angle, and the program instructs the control unit to change the configuration of the illumination optical system in accordance with imaging conditions to change the illumination light emitted from the distal end of the scope unit . It is characterized by executing a step of changing the illumination range .

A program according to one aspect of the present invention is a program for controlling an endoscope apparatus comprising a scope unit having an imaging optical system and an illumination optical system, and a control unit, wherein the program causes the control unit to A first subject image of a subject formed by light passing through a first imaging optical system and a second subject image of the subject formed by light passing through a second imaging optical system are formed in common. switching the imaging optical system so that only one of the first object image and the second object image is formed in an imaging area where the first imaging optical system is formed; The illumination light emitted from the distal end of the scope unit is adjusted based on the angle of view of the first imaging lens that constitutes the system and the angle of view of the second imaging lens that constitutes the second imaging optical system. and executing a step of changing.

An endoscope system according to one aspect of the present invention is an endoscope system comprising an endoscope including a scope unit having an imaging optical system and an illumination optical system, and a control unit for controlling the endoscope. wherein the illumination optical system is an illumination optical system having a configuration for changing an angle of illumination light, and the control unit changes the configuration of the illumination optical system according to imaging conditions to control the illumination of the endoscope. The illumination range of the illumination light emitted from the tip of the scope section is changed.

An endoscope system according to one aspect of the present invention is an endoscope system comprising an endoscope including a scope unit having an imaging optical system and an illumination optical system, and a control unit for controlling the endoscope. The endoscope includes a first subject image of a subject formed by light passing through a first imaging optical system, and a first subject image of the subject formed by light passing through a second imaging optical system. switching the imaging optical system so that only one of the first subject image and the second subject image is formed in an imaging area where two subject images are commonly formed; 1 switching unit and a switching signal for switching the first imaging optical system to the second imaging optical system or switching the second imaging optical system to the first imaging optical system; a switching unit driving unit for outputting to a first switching unit, wherein the control unit instructs the switching unit driving unit of the endoscope to output the switching signal, and has given the instruction. As a result, based on the angle of view of the first imaging lens that configures the first imaging optical system and the angle of view of the second imaging lens that configures the second imaging optical system, the endoscopic The illumination light emitted from the tip of the scope portion of the mirror is changed.

According to each aspect of the present invention, in the optical path switching type endoscope device, when the imaging optical system is switched, the light distribution (illumination optical system) can be switched according to the imaging area. As a result, for example, it is possible to uniformly illuminate the imaging area (imaging range) with uniform light distribution, to observe brightly without light loss, and to reduce overexposure and flare. That is, it is possible to improve the image quality by appropriately distributing light according to the imaging area. In addition, since an unnecessary range is not illuminated, it is possible to illuminate without wasting the light distribution.

It is a block diagram showing the whole endoscope device composition concerning a 1st embodiment of the present invention. FIG. 4 is a diagram showing the appearance of the distal end of the scope section of the endoscope device according to the first embodiment of the present invention; FIG. 4 is a diagram showing the relationship between an imaging area and a light distribution area when two imaging optical systems (imaging lenses) have different angles of view in the endoscope apparatus according to the first embodiment of the present invention; Fig. 10 shows the relationship between the imaging area and the light distribution area in the endoscope apparatus according to the second embodiment of the present invention when the focal lengths of two imaging optical systems (imaging lenses) are different from each other and when viewed from the side; It is a diagram. FIG. 3 is a diagram showing an example of a switching section (shutter) and an optical filter that operates in conjunction with the switching section in the endoscope apparatus according to the first embodiment of the present invention; It is a figure which shows the processing flow in the endoscope apparatus which concerns on 1st Embodiment of this invention. It is a block diagram showing the whole endoscope device composition concerning a 2nd embodiment of the present invention. FIG. 10 is a diagram showing a configuration in which a light source lens or a light source is switched in an endoscope apparatus according to a second embodiment of the present invention; FIG. 10 is a diagram showing another example of a configuration in which light source lenses are switched in the endoscope apparatus according to the second embodiment of the present invention; FIG. 10 is a diagram showing an example of a configuration in which a light source and a light source lens are switched as a set in an endoscope apparatus according to a second embodiment of the present invention; FIG. 9 is a diagram showing a configuration for switching light source lenses in an endoscope apparatus according to a second embodiment of the present invention; FIG. 9 is a diagram showing how light distribution changes by switching the light source and/or the light source lens at the base of the light guide (on the light source side) in the endoscope apparatus according to the second embodiment of the present invention. 9 is a graph showing the relationship between the angle of incidence of light (light distribution) on the light guide and the luminous intensity of light emitted from the tip of the light guide in the endoscope apparatus according to the second embodiment of the present invention. FIG. 11 is a diagram showing how the light emitted from the tip of the light guide changes as the incident angle (light distribution) of the light entering the light guide changes in the endoscope apparatus according to the second embodiment of the present invention; be. FIG. 11 is a diagram showing how the light emitted from the tip of the light guide changes as the incident angle (light distribution) of the light entering the light guide changes in the endoscope apparatus according to the second embodiment of the present invention; be. FIG. 9 is a diagram showing how the emission range of light emitted from the tip of the light guide changes by switching and polarizing the light source and/or the light source lens in the endoscope apparatus according to the second embodiment of the present invention. It is a block diagram showing the whole endoscope device composition concerning a 3rd embodiment of the present invention. The endoscope apparatus according to the third embodiment of the present invention has a separate shutter for switching the imaging optical system and a shutter for switching the light distribution (filter) of emitted light, and these are driven by separate driving units. 4 is a side view of the distal end of the configured scope section. FIG. FIG. 10 is a diagram showing a processing flow in an endoscope apparatus according to a third embodiment of the present invention; In the endoscope apparatus according to the modified example of the embodiment of the present invention, by changing the position of the tip of the light guide having an illumination system diffuser lens and an illumination system condenser lens at the tip of the scope part and having a flexible part 4A and 4B are views of the distal end of a scope unit having a configuration for switching illumination system lenses; FIG. 10 is a diagram of the distal end of the scope section having two diffuser lenses at the distal end of the scope section in the endoscope apparatus according to the modified example of the embodiment of the present invention, and configured to switch between the diffuser lenses using a prism. FIG. 10 is a diagram of the distal end of the scope section having two diffuser lenses at the distal end of the scope section in the endoscope apparatus according to the modified example of the embodiment of the present invention, and configured to switch the diffuser lenses with a mirror. It is a figure which shows the processing flow in the endoscope apparatus which concerns on embodiment of this invention. FIG. 5 is an image diagram showing the relationship between the angle of view of the optical system and the light distribution in the conventional endoscope device.

An endoscope apparatus according to an embodiment of the present invention will be described in detail below with reference to the drawings.

First, an endoscope apparatus according to a first embodiment of the present invention will be described. FIG. 1 is a block diagram showing the overall configuration of an endoscope apparatus according to this embodiment. The endoscope apparatus includes a scope section 20 that is inserted into an object to be inspected, and a body section 30 that controls the entire endoscope apparatus. The scope section 20 and the body section 30 are connected by an elongated insertion section 40 or the like that is inserted into the subject.

FIG. 2 is a diagram showing the appearance of the distal end of the scope section of the endoscope apparatus according to this embodiment. The scope unit 20 includes a first imaging optical system (first imaging lens) 21, a second imaging optical system (second imaging lens) 22, a switching unit (first switching unit, A second switching unit (shutter) 23 , a common optical system 24 , an imaging device (imaging area) 25 , a switching unit driving unit 26 , and an illumination optical system 27 are provided.

The switching unit 23 switches between the first imaging optical system 21 and the second imaging optical system 22 . That is, the switching unit 23 switches between the light incident from the first imaging optical system 21 and the light incident from the second imaging optical system 22, and transmits only one of the lights through the common optical system 24. to make it incident on the imaging device 25 . That is, either the first subject image of the subject formed by the light incident from the first imaging optical system 21 or the second subject image of the subject formed by the light incident from the second imaging optical system 22 An image is formed on the imaging device 25 .

The switching unit 23 includes, for example, a light shielding unit 231. By inserting the light shielding unit 231 into the imaging optical system on the non-selecting side, the light entering from the imaging optical system on the non-selecting side is blocked. The switching section 23 is driven by a switching section driving section 26 . Specifically, the switching unit driving unit 26 switches the first imaging optical system 21 to the second imaging optical system 22, or switches the second imaging optical system 22 to the first imaging optical system 21. to the switching unit 23. When the switching signal is input, the switching section 23 switches between the first imaging optical system 21 and the second imaging optical system 22 .

This embodiment can be applied to all cases in which there are two or more optical paths (imaging optical systems) and the optical paths are switched. Specifically, when the first imaging optical system 21 and the second imaging optical system 22 have different angles of view (switch between wide angle and narrow angle) and different fields of view (has parallax). , when the viewing directions are different from each other (for example, switching to the right side), when the focal lengths are different from each other (for example, switching between far and near), and when the filter characteristics are different from each other.

The illumination optical system 27 emits light transmitted from the light source block 31 (light source) of the main body 30 through the light guide 41, thereby distributing the light to the imaging area. The switching unit 23 switches the light distribution of the emitted light from the illumination optical system 27 in conjunction with the switching of the optical path (imaging optical system). This realizes appropriate light distribution for the imaging area. The details of switching the light distribution of the light emitted from the illumination optical system 27 will be described later.

The illumination optical system 27 is composed of an optical element (such as a Rot lens) that transmits light from the light guide 41 and an optical filter 232 (such as a diffusion lens) that operates in conjunction with the switching unit 23 . A lens (not shown) may be provided between the light guide 41 and the illumination optical system 27 .

An image formed by the imaging device 25 is transmitted to the main body 30 via the imaging cable 42 . The body section 30 includes an image conversion section 32 , an image sensor drive section 33 , a switching drive section 34 , a light source drive section 35 and a control section 36 .

The control unit 36 controls the image conversion unit 32 , the imaging device driving unit 33 , the switching driving unit 34 , the light source driving unit 35 and the light source block 31 . The control unit 36 also controls a display unit 37, a switch 38, and a memory unit 39 inside or outside the main unit.

The image conversion section 32 performs various image processing on the image transmitted from the imaging device 25 based on the instruction from the control section 36 . The imaging device driving section 33 is connected to the imaging device 25 via an imaging cable 42 and drives the imaging device 25 based on instructions from the control section 36 .

The light source block 31 generates light and transmits it to the illumination optical system 27 via the light guide 41 . The light source drive section 35 drives the light source block 31 based on instructions from the control section 36 .

The switching driving section 34 drives the switching section driving section 26 based on instructions from the control section 36 . Specifically, the switching drive unit 34 switches the first imaging optical system 21 to the second imaging optical system 22, or switches the second imaging optical system 22 to the first imaging optical system 21. A switching signal for switching is output to the switching unit driving unit 26 . When the switching signal is input, the switching section driving section 26 outputs the switching signal to the switching section 23 . The switching drive section 34 and the switching section drive section 26 are connected by a switching drive cable 43 .

Switching of the light distribution of the emitted light from the illumination optical system 27 will be described in detail. For example, when the angles of view of the two imaging optical systems (imaging lenses) are different from each other, the emitted light is switched between condensing and diffusing according to the angle of view. FIG. 3 is a diagram showing the relationship between the imaging area and the light distribution area when the two imaging optical systems (imaging lenses) have different angles of view in the endoscope apparatus according to this embodiment. A case where the first imaging optical system 21 is a narrow-angle lens and the second imaging optical system 22 is a wide-angle lens will be described. FIG. 3A shows the relationship between the imaging area 101 of the narrow-angle lens and the light distribution area 103a when switching to the narrow-angle lens (first imaging optical system 21). FIG. 3B shows the relationship between the imaging area 102 of the wide-angle lens and the light distribution area 103b when switching to the wide-angle lens (second imaging optical system 22).

As shown in FIG. 3, appropriate light distribution is achieved by switching between condensing and diffusing the emitted light from the illumination optical system 27 according to the angle of view at the time of switching the optical path. As a result, when switching to the wide-angle lens, the imaging area can be illuminated evenly. Also, when you switch to a narrow-angle lens, you can illuminate farther.

When the parallaxes of the two imaging optical systems (imaging lenses) are different from each other, for example, in the case of stereo measurement in which the left-eye lens and the right-eye lens are switched, the amount of light emitted from the illumination optical system 27 depends on the parallax. Switch light distribution. Specifically, in conjunction with the switching of the optical paths of the stereo optical system (switching between the left-eye lens and the right-eye lens), the lenses, prisms, mirrors, etc. included in the illumination optical system 27 are moved to change the light distribution angle of the emitted light. switch.

As a result, the object to be measured is shaded, and the image of the object looks more three-dimensional. And the measurement accuracy is improved. In addition, although it may not be possible to extract the edges of the measurement target due to lighting conditions, shading the subject creates feature points in the image, making it easier to capture the edges in the measurement process.

When the field directions of the two imaging optical systems (imaging lenses) are different from each other, for example, when switching between the direct-viewing lens and the side-viewing lens (straight-side switching), the illumination optical system is adjusted according to the field-of-view direction of the imaging lenses. 27 switches the light distribution of the emitted light. Specifically, in conjunction with switching between the direct-view lens and the side-view lens, the lens, prism, mirror, etc. included in the illumination optical system 27 are moved to switch the light distribution of the emitted light according to the lens direction. That is, when switching to the direct viewing lens, the front direction is illuminated, and when switching to the side viewing lens, the lateral direction is illuminated. As a result, an appropriate light distribution that matches the direction of the lens can be achieved, so that a long distance can be illuminated brightly without illuminating the outside of the observation range.

When the focal lengths of the two imaging optical systems (imaging lenses) are different from each other, for example, when switching between the far point lens and the near point lens (switching between the far point and the near point), the focal length of the imaging lens to switch the light distribution of the emitted light from the illumination optical system 27 . As the configuration of the illumination optical system 27, it is conceivable to change the light source, change the illumination lens, insert/remove the ND filter, adjust the light (change the drive current, perform PWM drive), etc. in conjunction with the switching of the focal length. .

The perspective switching of side viewing will be described with reference to the drawings. FIG. 4 shows the relationship between the imaging area and the light distribution area when the two imaging optical systems (imaging lenses) have different focal lengths and are viewed from the side in the endoscope apparatus according to the present embodiment. FIG. 4 is a view of the scope portion of the endoscope as seen from the side; A case where the first imaging optical system 21 is a far-point lens, the second imaging optical system 22 is a near-point lens, and both are side-viewing will be described.

When it is switched to the near-point lens, the illumination optical system 27 (diffusion lens) diffuses the light that has passed through the light guide 41 at an angle, thereby widening the light distribution area 103b and covering a wide range. brighten up When the lens is switched to the far point lens, the illumination optical system 27 (diffusion lens) converges the light passing through the light guide 41 to narrow the light distribution area 103a according to the range of the imaging area. As a result, even when switching to the far-point lens, the imaging area can be observed in a bright state.

With such a configuration, the light is brighter when switching to the far-point lens, and darker when switching to the near-point lens. That is, appropriate light distribution (brightness) can be achieved according to the focal length of the imaging lens. Thus, when switching to the far-point lens, even a distant object can be observed brightly, and when switching to the near-point lens, even a distant object can be observed without halation. Note that, in the above example, switching between perspective for side viewing has been described, but similar effects can be obtained for switching between perspective for direct viewing.

When the filter characteristics of the two imaging optical systems (imaging lenses) are different from each other, the light distribution (brightness, color temperature, etc.) of the light emitted from the illumination optical system 27 is adjusted according to the filter characteristics of the imaging lenses. switch. As a configuration of the illumination optical system 27, it is conceivable to use a color filter for illumination, change the color temperature of the illumination (using a laser, a halogen lamp, etc.), or switch the illumination itself.

By using optical systems having different filter characteristics, for example, infrared observation, ultraviolet observation, NBI (Narrow Band Imaging) observation, and the like can be performed. When performing infrared observation, the color temperature of the light emitted from the illumination optical system 27 is lowered, the red component is strengthened, or the light is switched to infrared light. When performing ultraviolet observation, the color temperature of the light emitted from the illumination optical system 27 is increased, the blue component is strengthened, or the light is switched to ultraviolet light. When performing NBI observation, the emitted light from the illumination optical system 27 is switched to a color temperature of a specific wavelength.

In this way, by switching the light distribution of the light emitted from the illumination optical system 27 according to the filter characteristics of the imaging lens, it is possible to improve the observation performance under a specific environment. In addition, illumination suitable for infrared observation, ultraviolet observation, NBI observation, and the like can be obtained.

Next, a specific configuration example of the illumination optical system 27 will be described as a first embodiment of the present invention. As described above, the illumination optical system 27 is composed of the optical element that transmits the light from the light guide 41 and the optical filter 232 that operates in conjunction with the switching section 23 . FIG. 5 is a diagram showing an example of the switching unit 23 (shutter) and an optical filter 232 that operates in conjunction with the switching unit 23, according to the first embodiment of the present invention. 5(a) and 5(b) are diagrams showing the structure and movement of the shutter when the imaging system is viewed from the front. 5(c) and 5(d) are diagrams showing the movement of the shutter when the imaging system is viewed from the front.

The switching unit 23 includes a light shielding unit 231. The light shielding unit 231 is positioned in the imaging optical system on the non-selected side, thereby blocking light incident from the imaging optical system on the non-selected side. The switching unit 23 operates by moving left and right around the shutter shaft 233 . 5A and 5C, the switching unit 23 (shutter) is switched to the first imaging optical system 21, and the light shielding unit 231 blocks light entering from the second imaging optical system 22 not selected. Indicates that the 5B and 5D, the switching unit 23 (shutter) is switched to the second imaging optical system 22, and the light shielding unit 231 blocks light entering from the first imaging optical system 21 not selected. Indicates that the

The switching portion 23 is provided with an optical filter 232, and the optical filter 232 moves left and right as the switching portion 23 moves left and right. As shown in FIGS. 5A and 5C, when the switching unit 23 (shutter) is switched to the first imaging optical system 21, the optical filter 232 is included in the illumination optical system 27. That is, the optical filter 232 is arranged on the optical axis of the light source. Thereby, light from the light guide 41 is radiated through the optical filter 232 . As shown in FIGS. 5B and 5D, when the switching unit 23 (shutter) is switched to the second imaging optical system 22, the optical filter 232 is not included in the illumination optical system 27. , that is, the optical filter 232 is not arranged on the optical axis of the light source. Thereby, the light from the light guide 41 is emitted without passing through the optical filter 232 . The optical filter 232 is a diffusion filter (diffusion lens, diffusion section), a condensing filter (condensing lens, condensing section), or the like. Note that FIG. 5 shows an example in which the shutter shaft 233 is at the end of the switching section 23 (shutter), but the present embodiment is not limited to such a shape. If the state in which the optical filter 232 is arranged on the optical axis of the light source and the state in which it is not arranged are switched at the same time when the first imaging optical system 21 and the second imaging optical system 22 are switched, The switching portion 23 (shutter) may have any shape.

A case will be described where the first imaging optical system 21 is a wide-angle lens and the second imaging optical system 22 is a narrow-angle lens. When the switching unit 23 selects the narrow-angle lens (second imaging optical system 22), the light from the illumination optical system 27 is diffused as shown in FIGS. 5(b) and 5(d). To radiate without going through a filter (diffusion lens, diffusion part). When the switching unit 23 selects the wide-angle lens (first imaging optical system 21), as shown in FIGS. (diffusing lens, diffuser). In this way, by providing a diffuser or a condensing part that moves in conjunction with the shutter (switching part 23), it is possible to switch between condensing, diffusing, and polarizing the emitted light in accordance with the angle of view in conjunction with the switching of the optical path. can be done. Accordingly, as shown in FIG. 3, the observation range can be appropriately illuminated by switching the light distribution according to the angle of view of the imaging lens.

The overall system configuration of the endoscope apparatus using the illumination optical system 27 described above is the same as that shown in FIG. The processing flow is as shown in FIG. FIG. 6 is a diagram showing a processing flow in the endoscope apparatus according to this embodiment.

When an image display instruction is issued (step S1), user input is received from the switch 38, touch panel, etc. (step S2). It is determined whether or not the wide-angle lens is selected by the user input (step S3). If the wide-angle lens is selected, the shutter (switching unit 23) is switched to the wide-angle lens. The emitted light is diffused and radiated through a diffusion filter (diffusion lens, diffusion portion) (step S4), and in this state, an image is picked up and displayed (step S5). When the wide-angle lens is not selected, the shutter (switching section 23) is switched to the narrow-angle lens, and at the same time, the emitted light from the illumination optical system 27 is diffused without passing through a diffusion filter (diffusion lens, diffusion section). The light is radiated (condensed) (step S6), and an image is captured and displayed in this state (step S5).

In the above description, an example in which the angles of view of the two imaging optical systems are different from each other has been described. This embodiment can be applied. For example, when the first imaging optical system 21 is used for ultraviolet observation and the second imaging optical system 22 is used for infrared observation, a bandpass filter is used as the optical filter 232 .

Next, a second embodiment of the invention will be described. In this embodiment, an endoscope that has two lenses (imaging optical system) and switches the optical path (imaging optical system) has a configuration for switching incident light to the light guide 41 . FIG. 7 is a block diagram showing the overall configuration of the endoscope apparatus according to this embodiment. A description of the same configuration as in FIG. 1 is omitted.

In FIG. 7, the internal configuration of the light source block 31 and the configuration of the switching unit 23 and the illumination optical system 27 are different from those in FIG. Specifically, in FIG. 1, the emitted light is switched in the illumination optical system 27 ahead of the light guide 41, but in FIG. switch. Therefore, the illumination optical system 27 does not have an optical filter 232 (diffusion lens or the like) that operates in conjunction with the switching section 23 .

As shown in FIG. 7 , the light source block 31 includes a light source 311 , a light source lens 312 positioned between the light source 311 and the light guide 41 , and an actuator 313 that drives the light source 311 and the light source lens 312 . The light source lens 312 is, for example, a condensing lens. FIG. 8 is a diagram showing a configuration in which the light source lens 312 or the light source 311 is switched in this embodiment. The light source lens 312 or the light source 311 is switched at the base of the light guide 41 (on the light source 311 side) in conjunction with the switching of the imaging optical system by the switching unit 23 of the scope unit 20 .

When switching the light source lens, the light source lens positioned between the light source 311 and the light guide 41 is switched between the light source lens 312a and the light source lens 312b. The switching of the light source lens is performed by the actuator 313 and controlled by the control unit 36 so as to be interlocked with the switching of the imaging optical system by the switching unit 23 . The light source lens may be a condensing lens, a diffusing lens, a polarizing lens, or the like.

When switching the light source, the light source is switched between the light source 311a and the light source 311b. The switching of the light source is performed by the actuator 313 and controlled by the control unit 36 so as to be interlocked with the switching of the imaging optical system by the switching unit 23 .

By having the configuration for switching the incident light to the light guide 41 as described above, it is possible to switch the light distribution (condensation, diffusion, polarization, etc.) of the emitted light according to the angle of view in conjunction with the switching of the optical path. can. This configuration is more effective with a light source having a small bright spot, such as an LD (Laser Diode).

FIG. 9 is a diagram showing another example of the configuration in which the light source lens 312 is switched in this embodiment. The light source block 31 has a revolver 314 connected to an actuator 313 . A plurality of light source lenses 312 having different characteristics are arranged in the revolver 314 , and the revolver 314 is rotated by driving the actuator 313 to switch (replace or select) the light source lens 312 positioned in front of the light source 311 . be able to. It is not necessary for all the light source lenses 312 arranged on the revolver 314 to have different characteristics. For example, two types of light source lenses 312 may be arranged alternately (adjacently) on the revolver 314 .

With the above configuration, the light source lens 312 is switched at the base of the light guide 41 (on the light source 311 side) in conjunction with switching of the imaging optical system by the switching unit 23 of the scope unit 20 . A configuration in which a plurality of light sources are prepared and the light source side is rotated is also conceivable.

FIG. 10 is a diagram showing an example of a configuration in which the light source and the light source lens are switched as a set in this embodiment. The light source block 31 has a sliding mechanism 315 on which multiple sets of light sources and light source lenses are mounted. The slide mechanism 315 is driven by an actuator 313 to switch the light source and light source lens at the base of the light guide 41 (on the light source 311 side) in conjunction with switching of the imaging optical system by the switching section 23 of the scope section 20 .

In the example of FIG. 10, the slide mechanism 315 is equipped with a set consisting of a light source 311a and a light source lens 312a and a set consisting of a light source 311b and a light source lens 312b. The light source and light source lens are switched by sliding these sets so that they are positioned at the base of the light guide 41 . In FIG. 10(a), a set consisting of light source 311b and light source lens 312b is selected. In FIG. 10(b), a set consisting of light source 311a and light source lens 312a is selected.

Here, the light source lens 312 will be described. As mentioned above, the light source lens 312 is positioned between the light source 311 and the light guide 41 . The light source lens 312 is, for example, a condensing lens. By changing (switching) the size, type and focal length of the light source lens 312 (collecting lens), the light distribution and luminous intensity to the light guide 41 are changed (switched).

FIG. 11 is a diagram showing a configuration for switching light source lenses. FIG. 11A shows a configuration in which the size of the light source lens is changed. That is, the light source lens 312a (large lens) and the light source lens 312b (small lens) are switched. FIG. 11B shows a configuration for changing the focal length of the light source lens. That is, the light source lens 312a and the light source lens 312b having different focal lengths are switched. 8 to 10 can be adopted for the switching method of the light source lens. As a result, for example, the size of the light source lens can be changed stepwise, or the focal length of the light source lens can be changed stepwise.

As described above, changes in light distribution due to switching of the light source 311 and/or the light source lens 312 at the base of the light guide 41 (on the light source 311 side) will be described. FIG. 12 is a diagram showing how the light distribution changes by switching the light source 311 and/or the light source lens 312 at the base of the light guide 41 (on the light source 311 side) in the endoscope apparatus according to the present embodiment. be. By switching the light source 311 and/or the light source lens 312 , the light distribution of the light emitted from the light source lens 312 switches between the light distribution A and the light distribution B and enters the light guide 41 . In the example of FIG. 12, the light distribution A is a narrow light distribution area, and the light distribution B is a wide light distribution area.

FIG. 13 is a graph showing the relationship between the angle of incidence of light (light distribution) on the light guide 41 and the luminous intensity of light emitted from the tip of the light guide 41 . The solid line in the graph indicates the case where the light distribution is widened, that is, the case where the incident angle of light to the light guide 41 is wide (corresponding to light distribution B in FIG. 12). When the light distribution is widened, the luminous intensity becomes lower and darker as indicated by the solid line in the graph. The dotted line in the graph indicates the case where the light distribution is narrowed, that is, the case where the incident angle of light to the light guide 41 is narrow (corresponding to the light distribution A in FIG. 12). When a large lens is used to collect diffused light in the surroundings and narrow the light distribution, the luminous intensity increases and becomes brighter as shown by the dotted line in the graph.

By switching between light collection and diffusion by the light source 311 and/or the light source lens 312 at the base of the light guide 41 (on the light source 311 side), the imaging area can be spot-brightened. FIG. 14 is a diagram showing how the light emitted from the tip of the light guide 41 changes as the incident angle (light distribution) of the light to the light guide 41 is switched.

FIG. 14( a ) is a diagram in which light is collected by the light source 311 and/or the light source lens 312 . In this case, the light incident angle to the light guide 41 is narrow, and the light emitted from the tip of the light guide 41 brightens a small area in the center of the bundle (light guide). By condensing the light spotwise in this way, it is possible to illuminate a longer distance.

FIG. 14(b) is a diagram in the case of diffusion by the light source 311 and/or the light source lens 312. FIG. In this case, the angle of incidence of light on the light guide 41 is wide, and the light emitted from the tip of the light guide 41 uniformly transmits the light through the entire bundle (light guide) and uniformly illuminates a wide range.

Contrary to the above example, the light source 311 and/or the light source lens 312 at the base of the light guide 41 (on the side of the light source 311) switch light collection and diffusion to brighten the periphery of the imaging area and darken the center. be able to. FIG. 15 is a diagram showing how the light emitted from the tip of the light guide 41 changes as the incident angle (light distribution) of the light to the light guide 41 is switched.

FIG. 15(a) is a diagram in which light is collected by the light source 311 and/or the light source lens 312 so that the center of the imaging area is dark and the periphery is bright. FIG. 15(b) is a diagram in which the light source 311 and/or the light source lens 312 converge the light further outside than in FIG. 15(a). In this way, by brightening the periphery of the imaging area, it is possible to reduce overexposure and flare caused by optical characteristics without illuminating areas unnecessary for observation. That is, it is possible to reduce overexposure that occurs in the center of the image during close-up photography, etc., and to reduce flare due to reflected light of the self-illumination.

By switching and polarizing the light source 311 and/or the light source lens 312 at the base of the light guide 41 (on the light source 311 side), the emission range of the light emitted from the tip of the light guide 41 can be changed. FIG. 16 is a diagram showing how the emission range of light emitted from the tip of the light guide 41 changes by switching and polarizing the light source 311 and/or the light source lens 312 . By switching and polarizing the light source 311 and/or the light source lens 312, the state of FIG. 16(a) and the state of FIG. 16(b) are switched. In FIG. 16A, the light emitted from the tip of the light guide 41 is bright only in the right half of the bundle (light guide). In FIG. 16B, the light emitted from the tip of the light guide 41 is bright only in the left half of the bundle (light guide). This makes it possible to illuminate the subject at an angle, so that it is possible to reduce overexposure and flare caused by optical characteristics without illuminating areas unnecessary for observation.

Next, a third embodiment of the invention will be described. This embodiment is a combination of the first embodiment and the second embodiment. That is, in an endoscope having two lenses (imaging optical system) and switching the optical path (imaging optical system), the switching unit 23 switches the illumination optical system in conjunction with the switching of the optical path (imaging optical system). It has a configuration for switching the light distribution of the emitted light from 27 and switching the incident light to the light guide 41 .

FIG. 17 is a block diagram showing the overall configuration of the endoscope apparatus according to this embodiment, which is a combination of FIGS. 1 and 7. As shown in FIG. That is, the switching section 23 has an optical filter 232 (collecting lens, diffusing lens, etc.) that switches the light distribution of the light emitted from the illumination optical system 27 in conjunction with the switching section 23 (shutter). The light source block 31 also includes a light source 311 , a light source lens 312 (collecting lens, diffuser lens, etc.) positioned between the light source 311 and the light guide 41 , and an actuator 313 that drives the light source 311 and the light source lens 312 .

With such a configuration, the light is condensed or diffused before passing through the light guide 41 and then transmitted to the illumination optical system 27 of the scope section 20 . For example, by condensing the light with the light source lens 312 and transmitting the light in advance, it becomes easier for the condensing lens of the illumination optical system 27 to collect the light. Alternatively, by diffusing the light by the light source lens 312 and transmitting the light in advance, it becomes easier for the diffusing lens of the illumination optical system 27 to diffuse the light. Due to such action, the diffusing and condensing effects of the illumination optical system 27 of the scope unit 20 are increased. In addition, overexposure and flare caused by optical characteristics can be reduced without illuminating areas unnecessary for observation.

In the example of FIG. 5 described above, the switching unit 23 (shutter) for switching the imaging optical system and the optical filter 232 (condensing lens, diffusion lens, etc.) for switching the light distribution of the emitted light from the illumination optical system 27 are interlocked. I showed an example that works. That is, the switching unit 23 (shutter) and the optical filter 232 are driven in conjunction with each other by the switching driving unit 34 .

However, a shutter (first switching unit) for switching the imaging optical system and a shutter (second switching unit) for switching the light distribution (filter) of emitted light are separately provided, and these are driven by separate driving units. You may FIG. 18 is a side view of the distal end of the scope section 20 having such a configuration.

A first shutter (first switching unit) 123 switches between the two imaging optical systems (imaging lenses) 21 and 22 . Specifically, by inserting the light shielding part 231 provided in the first shutter 123 into the imaging optical system on the non-selected side and blocking the light incident from the imaging optical system on the non-selected side, the imaging optical system to select. The first shutter 123 is driven by the first driving section 126 .

A second shutter (second switching unit) 223 includes an optical filter 232 (collecting lens, diffusing lens, etc.) and switches the light distribution of emitted light. Specifically, the light distribution of the light emitted from the illumination optical system 27 is switched by switching between a state in which the optical filter 232 is arranged on the optical axis of the light source and a state in which it is not arranged. The second shutter 223 is driven by a second drive section 226 . With such a configuration, the shutters of the observation system and the illumination system can be controlled separately.

In this configuration, the processing flow is as shown in FIG. The difference from the processing flow of FIG. 6 is that the shutters of the observation system and the illumination system can be separately controlled in FIG. When the wide-angle lens is selected, the light emitted from the illumination optical system 27 is diffused through a diffusion filter (diffusion lens, diffusion section) and radiated (step S41). Then, the shutter (switching unit 23) is switched to the wide-angle lens (step S42). In this state, an image is picked up and displayed (step S5). If the wide-angle lens is not selected, the light emitted from the illumination optical system 27 is radiated (condensed) without being diffused without passing through a diffusion filter (diffusion lens, diffusion section) (step S61). . Then, the shutter (switching unit 23) is switched to the narrow-angle lens (step S61). In this state, an image is picked up and displayed (step S5).

Steps S41 and S42 may be reversed, and steps S61 and S62 may be reversed. Therefore, it is preferable because the user does not feel discomfort.

As a modification, an illumination system diffuser lens 271 and an illumination system condenser lens 272 are provided at the tip of the scope unit 20. By changing the position of the tip (base 411) of the ride guide 41 having a flexible portion, the illumination system lens will be described. FIG. 20 is a diagram of the distal end of the scope section 20 having such a configuration. The ride guide 41 having a flexible portion moves in conjunction with the switching portion driving portion 26, and the arrangement of the ride guide 41 entering the illumination system diffusion lens 271 and the arrangement of the ride guide 41 entering the illumination system condenser lens 272 are arranged. switch between That is, the tip of the ride guide 41 shifts to the right or to the left. With such a configuration, the illumination optical system can be switched in conjunction with the switching unit drive unit 26 .

As another modified example, a configuration in which two diffusing lenses 275a and 275b are provided at the tip of the scope section 20 and the diffusing lenses are switched by the prism 274 will be described. FIG. 21 is a diagram of the distal end of the scope section 20 having such a configuration. The light emitted from the ride guide 41 enters the prism 274 via the condenser lens 273 . The prism 274 moves in conjunction with the switching section drive section 26 to switch the optical path of illumination between the diffuser lens 275a and the diffuser lens 275b. With such a configuration, the illumination optical system can be switched in conjunction with the switching unit drive unit 26 .

As another modified example, a configuration in which two diffusion lenses 275a and 275b are provided at the tip of the scope unit 20 and the diffusion lenses are switched by a mirror 276 will be described. FIG. 22 is a diagram of the distal end of the scope section 20 having such a configuration. The light emitted from the ride guide 41 enters the mirror 276 via the condensing lens 273 . The mirror 276 moves in conjunction with the switching unit drive unit 26, and switches the optical path of illumination between the diffuser lens 275a and the diffuser lens 275b. With such a configuration, the illumination optical system can be switched in conjunction with the switching unit drive unit 26 .

In the above description, it is assumed that the imaging optical system (imaging lens) is switched. can be used to cut out the effective imaging area even if the switching is not performed (there is no switching unit). In this case, only the illumination optical system is switched without switching the optical path. For example, this allows the depth to be increased by cutting out the center of the imaging area. Alternatively, it is possible to observe with a wide angle in advance and cut out only the center from the image for use. FIG. 23 is a diagram showing the processing flow of such a configuration. The difference from the flow of FIG. 19 is that the optical path is not switched. In this way, it is determined which part of the imaging area is to be used, and the illumination optical system is switched based on the result.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments and their modifications. Configuration additions, omissions, substitutions, and other changes are possible without departing from the scope of the present invention.

Each component included in the main unit 30 shown in each embodiment is for explaining the function and processing related to each component. In the endoscope apparatus, one configuration may simultaneously realize the functions and processes related to the plurality of components described in each embodiment.

In addition, each component included in the main unit 30 shown in each embodiment consists of one or more processors, logic circuits, memories, input/output interfaces, computer-readable recording media, etc., individually or as a whole. You may make it implement|achieve with a computer. In that case, a program for realizing the function of each component or the entire main body may be recorded in a recording medium, and the recorded program may be read into a computer system and executed. For example, the processor is at least one of a CPU, a DSP (Digital Signal Processor), and a GPU (Graphics Processing Unit). For example, the logic circuit is at least one of ASIC (Application Specific Integrated Circuit) and FPGA (Field-Programmable Gate Array).

For example, the main unit 30 shown in FIG. 1 or a part thereof, the image conversion unit 32 included in the main unit 30, the imaging device driving unit 33, the switching driving unit 34, the light source driving unit 35, the control unit 36, etc., the endoscope By recording a program for realizing the functions and processes of the device in a computer-readable recording medium, and causing the computer system to read and execute the program recorded in the recording medium, the introspection of the present embodiment can be performed. Various functions and processes described above related to the mirror device may be performed. Note that the “computer system” referred to here may include hardware such as an OS and peripheral devices. The "computer system" also includes the home page providing environment (or display environment) if the WWW system is used. In addition, "computer-readable recording medium" means writable non-volatile memory such as flexible disk, magneto-optical disk, ROM, flash memory, portable medium such as CD-ROM, hard disk built in computer system, etc. storage device.

Furthermore, "computer-readable recording medium" means a volatile memory (e.g., DRAM (Dynamic Random Access Memory)), which holds a program for a certain period of time. Also, the program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the "transmission medium" for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. Further, the program may be for realizing part of the functions described above. Furthermore, it may be a so-called difference file (difference program) that implements the above-described functions in combination with a program already recorded in the computer system.

Directional terms such as "front, back, up, down, right, left, vertical, horizontal, vertical, horizontal" are used herein to describe these directions in the device of the present invention. . Accordingly, these terms used to describe the specification of the present invention should be interpreted relative to the device of the present invention.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments and their modifications. Configuration additions, omissions, substitutions, and other changes are possible without departing from the scope of the present invention.

20... Scope unit 21... First imaging optical system (first imaging lens, imaging optical system) 22... Second imaging optical system (second imaging lens, imaging optical system) , 23... Switching section (first switching section, second switching section, shutter), 25... Imaging area (imaging device), 26... Switching section driving section, 27... Illumination optical system (diffusion lens), 31... Light source block (light source) 36 Control unit 123 First shutter (first switching unit) 223 Second shutter (second switching unit)
232... Optical filter (diffusion lens) 271... Illumination system diffusion lens (diffusion lens) 272... Illumination system condensing lens (condensing lens) 275a, 275b... Diffusion lens 311... Light source 312... Light source lens (concentration light lens, diffusion lens)

Claims (18)

a scope unit having an imaging optical system and an illumination optical system;
a control unit;
An endoscopic device comprising:
The illumination optical system is an illumination optical system having a configuration for changing the angle of illumination light,
The endoscope apparatus according to claim 1, wherein the control section changes the configuration of the illumination optical system according to imaging conditions to change the illumination range of the illumination light emitted from the distal end of the scope section. A first subject image of a subject formed by light passing through a first imaging optical system and a second subject image of the subject formed by light passing through a second imaging optical system are formed in common. a first switching unit configured to switch an imaging optical system such that only one of the first subject image and the second subject image is formed in an image forming area;
a switching signal for switching the first imaging optical system to the second imaging optical system or for switching the second imaging optical system to the first imaging optical system to the first switching unit; a switching unit driving unit that outputs;
further comprising
The control unit
instructing the switching unit driving unit to output the switching signal;
The imaging optical system switched by the first switching unit as a result of issuing the instruction, out of the imaging optical systems selected from the first imaging optical system and the second imaging optical system. 2. The endoscope apparatus according to claim 1, wherein the illumination light emitted from the distal end of the scope portion is changed based on. a scope unit having an imaging optical system and an illumination optical system;
a control unit;
An endoscopic device comprising:
A first subject image of a subject formed by light passing through a first imaging optical system and a second subject image of the subject formed by light passing through a second imaging optical system are formed in common. a first switching unit configured to switch an imaging optical system such that only one of the first subject image and the second subject image is formed in an image forming area;
a switching signal for switching the first imaging optical system to the second imaging optical system or for switching the second imaging optical system to the first imaging optical system to the first switching unit; a switching unit driving unit that outputs;
further comprising
The control unit
instructing the switching unit driving unit to output the switching signal;
As a result of the above instructions,
Based on the angle of view of the first imaging lens that configures the first imaging optical system and the angle of view of the second imaging lens that configures the second imaging optical system, from the tip of the scope section An endoscope apparatus characterized by changing emitted illumination light. The angle of view of the first imaging lens is larger than the angle of view of the second imaging lens,
The control unit
determining whether the imaging optical system that forms an image on the imaging area is the first imaging optical system or the second imaging optical system;
As a result of the determination, if the imaging optical system that forms an image on the imaging area is the first imaging optical system, the imaging optical system that forms an image on the imaging area is the second imaging optical system. 4. The endoscope apparatus according to claim 3, wherein illumination light diffused more than illumination light emitted when the imaging optical system is used is emitted. a scope unit having an imaging optical system and an illumination optical system;
a control unit;
An endoscopic device comprising:
A first subject image of a subject formed by light passing through a first imaging optical system and a second subject image of the subject formed by light passing through a second imaging optical system are formed in common. a first switching unit configured to switch an imaging optical system such that only one of the first subject image and the second subject image is formed in an image forming area;
a switching signal for switching the first imaging optical system to the second imaging optical system or for switching the second imaging optical system to the first imaging optical system to the first switching unit; a switching unit driving unit that outputs;
further comprising
The control unit
instructing the switching unit driving unit to output the switching signal;
As a result of the above instructions,
Based on the parallax of the first imaging lens constituting the first imaging optical system and the parallax of the second imaging lens constituting the second imaging optical system, the light emitted from the distal end of the scope section An endoscope apparatus, characterized in that it changes illumination light. The control unit
determining whether the imaging optical system that forms an image on the imaging area is the first imaging optical system or the second imaging optical system;
6. The endoscope apparatus according to claim 5, wherein the illumination light is emitted from the distal end of the scope section at a light distribution angle according to the determination result. a scope unit having an imaging optical system and an illumination optical system;
a control unit;
An endoscopic device comprising:
A first subject image of a subject formed by light passing through a first imaging optical system and a second subject image of the subject formed by light passing through a second imaging optical system are formed in common. a first switching unit configured to switch an imaging optical system such that only one of the first subject image and the second subject image is formed in an image forming area;
a switching signal for switching the first imaging optical system to the second imaging optical system or for switching the second imaging optical system to the first imaging optical system to the first switching unit; a switching unit driving unit that outputs;
further comprising
The control unit
instructing the switching unit driving unit to output the switching signal;
As a result of the above instructions,
Based on the focal length of the first imaging lens that constitutes the first imaging optical system and the focal length of the second imaging lens that constitutes the second imaging optical system, from the distal end of the scope section An endoscope apparatus characterized by changing emitted illumination light. The control unit
determining whether the imaging optical system that forms an image on the imaging area is the first imaging optical system or the second imaging optical system;
8. The endoscope apparatus according to claim 7, wherein the intensity or light distribution of the illumination light emitted from the distal end of the scope portion is changed according to the determination result. a scope unit having an imaging optical system and an illumination optical system;
a control unit;
An endoscopic device comprising:
A first subject image of a subject formed by light passing through a first imaging optical system and a second subject image of the subject formed by light passing through a second imaging optical system are formed in common. a first switching unit configured to switch an imaging optical system such that only one of the first subject image and the second subject image is formed in an image forming area;
a switching signal for switching the first imaging optical system to the second imaging optical system or for switching the second imaging optical system to the first imaging optical system to the first switching unit; a switching unit driving unit that outputs;
further comprising
The control unit
instructing the switching unit driving unit to output the switching signal;
As a result of the above instructions,
Based on the filter characteristics of the first imaging lens that constitutes the first imaging optical system and the filter characteristics of the second imaging lens that constitutes the second imaging optical system, from the distal end of the scope section An endoscope apparatus characterized by changing emitted illumination light. The control unit
determining whether the imaging optical system that forms an image on the imaging area is the first imaging optical system or the second imaging optical system;
10. The endoscope apparatus according to claim 9, wherein at least one of intensity, color temperature, and light distribution angle of the illumination light emitted from the distal end of the scope section is changed according to the determination result. a light source that generates the illumination light;
a diffusing lens provided between the light source and the tip of the scope portion for diffusing illumination light emitted from the tip of the scope portion;
a second switching unit that switches between a state in which the diffuser lens is arranged on the optical axis of the light source and a state in which it is not arranged;
further having
The control unit controls the second switching unit to switch between a state in which the diffusion lens is arranged on the optical axis of the light source and a state in which the diffusion lens is not arranged, according to the imaging conditions. The endoscope apparatus according to claim 1, characterized by: a scope unit having an imaging optical system and an illumination optical system;
a control unit;
An endoscopic device comprising:
A first subject image of a subject formed by light passing through a first imaging optical system and a second subject image of the subject formed by light passing through a second imaging optical system are formed in common. a first switching unit configured to switch an imaging optical system such that only one of the first subject image and the second subject image is formed in an image forming area;
a switching signal for switching the first imaging optical system to the second imaging optical system or for switching the second imaging optical system to the first imaging optical system to the first switching unit; a switching unit driving unit that outputs;
further comprising
a light source that produces illumination light;
a diffusing lens provided between the light source and the tip of the scope portion for diffusing illumination light emitted from the tip of the scope portion;
further having
the diffusion lens is connected to the first switching unit;
The first switching unit switches between a state in which the diffuser lens is arranged on the optical axis of the light source and a state in which it is not arranged,
The control unit
determining whether the imaging optical system that forms an image on the imaging area is the first imaging optical system or the second imaging optical system;
Controlling the first switching unit and outputting the switching signal when the imaging optical system that forms an image on the imaging area is the first imaging optical system as a result of the determination. An endoscope apparatus , comprising: instructing a switching unit driving unit to dispose the diffuser lens on the optical axis of the light source as a result of the instruction . A method for switching an illumination optical system in an endoscope apparatus comprising: a scope unit having an imaging optical system and an illumination optical system; and a control unit,
The illumination optical system is an illumination optical system having a configuration for changing the angle of illumination light,
The switching method is
Illumination optics in an endoscope apparatus, comprising : changing the configuration of the illumination optical system according to imaging conditions to change the illumination range of the illumination light emitted from the distal end of the scope unit. System switching method. A method for switching an illumination optical system in an endoscope apparatus comprising: a scope unit having an imaging optical system and an illumination optical system; and a control unit,
A first subject image of a subject formed by light passing through a first imaging optical system and a second subject image of the subject formed by light passing through a second imaging optical system are formed in common. switching the imaging optical system so that only one of the first object image and the second object image is formed in the image forming area;
Based on the angle of view of the first imaging lens that configures the first imaging optical system and the angle of view of the second imaging lens that configures the second imaging optical system, from the tip of the scope section A method for switching an illumination optical system in an endoscope apparatus, comprising the step of changing emitted illumination light. A program for controlling an endoscope apparatus comprising a scope unit having an imaging optical system and an illumination optical system, and a control unit,
The illumination optical system is an illumination optical system having a configuration for changing the angle of illumination light,
The program, in the control unit,
A program for executing a step of changing the configuration of the illumination optical system according to imaging conditions to change the illumination range of the illumination light emitted from the tip of the scope unit. A program for controlling an endoscope apparatus comprising: a scope unit having an imaging optical system and an illumination optical system; and a control unit, wherein the program causes the control unit to:
A first subject image of a subject formed by light passing through a first imaging optical system and a second subject image of the subject formed by light passing through a second imaging optical system are formed in common. switching the imaging optical system so that only one of the first object image and the second object image is formed in the image forming area;
Based on the angle of view of the first imaging lens that configures the first imaging optical system and the angle of view of the second imaging lens that configures the second imaging optical system, from the tip of the scope section changing emitted illumination light;
A program characterized by causing the execution of an endoscope including a scope section having an imaging optical system and an illumination optical system;
a control unit that controls the endoscope;
An endoscope system comprising:
The illumination optical system is an illumination optical system having a configuration for changing the angle of illumination light,
The control unit changes the configuration of the illumination optical system according to imaging conditions to change the illumination range of illumination light emitted from the distal end of the scope unit of the endoscope.
An endoscope system characterized by: an endoscope including a scope section having an imaging optical system and an illumination optical system;
a control unit that controls the endoscope;
An endoscope system comprising:
The endoscope is
A first subject image of a subject formed by light passing through a first imaging optical system and a second subject image of the subject formed by light passing through a second imaging optical system are formed in common. a first switching unit configured to switch an imaging optical system such that only one of the first subject image and the second subject image is formed in an image forming area;
a switching signal for switching the first imaging optical system to the second imaging optical system or switching the second imaging optical system to the first imaging optical system to the first switching unit; a switching unit driving unit that outputs;
further having
The control unit
instructing the switching unit driving unit of the endoscope to output the switching signal;
As a result of the above instructions,
based on the angle of view of a first imaging lens that constitutes the first imaging optical system and the angle of view of a second imaging lens that constitutes the second imaging optical system, changing the illumination light emitted from the tip of the scope section
An endoscope system characterized by:

Images