JP2003235807A - Ophthalmologic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily set respectively suitable display conditions when switching and displaying the alignment image of a motion picture and a photographed (imaged) still picture on a monitor. <P>SOLUTION: The ophthalmologic apparatus equipped with the monitor for displaying the image of an eye to be examined is provided with a first imaging means for picking up the still picture of the eye to be examined illuminated with illuminating light for photographing, a second imaging means for picking up the motion picture for aligning the eye to be examined illuminated with illuminating light for observation, a display image switching means for switching an image to be displayed on the monitor to the motion picture and to the still picture, an adjustment means for adjusting at least one display condition of luminance and contrast concerning the respective motion picture and still picture to be displayed on the monitor, a storage means for digitally storing the adjusted display condition of each picture, and a setting means for calling the display condition stored in the storage means on the basis of a switching signal from the display image switching means and setting the image display of the monitor to that called display condition. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic apparatus used in an ophthalmology clinic or the like.

[0002]

2. Description of the Related Art As an ophthalmologic apparatus for displaying an image of an eye to be examined,
A non-mydriasis fundus camera is known. This non-mydriasis fundus camera uses natural mydriasis in a dark room such as a dark room during alignment, and observes a black-and-white video image obtained by illuminating the fundus of the eye to be examined with infrared light on a monitor. While doing the alignment. On the other hand, for shooting, a color still image is shot using flash light. There is a large difference on the monitor between the unclear fundus image due to infrared light during alignment and the clear color fundus image due to the flash light during shooting, especially when displaying on the same monitor. Set the display conditions to suit each.

[0003]

However, in many conventional monitor settings, the volume is manually rotated. Whenever a color still image is switched to a black-and-white moving image, the user reaches out to the device to make the setting. It had to be redone and was a hassle. For example, in a moving image during alignment, it is often easier to check the eye position by increasing the contrast, but for a still image in color, if the contrast is increased too much, the nipple that has high reflectance can be visually recognized. Hard to do. In addition, the brightness may be too bright if a moving image is aligned for alignment so that it is easy to see and then switched to a color still image.

The present invention has been made in view of the above problems of the conventional device.
An object of the present invention is to provide an ophthalmologic apparatus that can easily set display conditions suitable for a moving image alignment image and a captured (captured) still image by switching to a monitor for display.

[0005]

In order to solve the above problems, the present invention is characterized by having the following configuration. (1) In an ophthalmologic apparatus including a monitor for displaying an image of an eye to be inspected, for aligning the first image capturing means for capturing a still image of the eye to be inspected illuminated by the photographing illumination light with the eye to be inspected illuminated by the illumination light for observation. Second image pickup means for picking up a moving picture image, display image switching means for switching the image displayed on the monitor between the moving picture image and the still image, and the moving picture image and the still image displayed on the monitor. At least one of brightness or contrast
Adjusting means for adjusting one display condition, storage means for digitally storing the adjusted display conditions of the respective images, and display conditions stored in the storage means are called based on a switching signal of the display image switching means. And setting means for setting the image display of the monitor to the called display condition. (2) In the ophthalmologic apparatus of (1), the screen display of the monitor is switched from the screen mode of the moving image or the still image switched by the display image switching unit to a screen mode in which the display condition is adjusted by the adjusting unit. It is characterized by comprising a mode switching means. (3) In the ophthalmologic apparatus of (1), the display condition adjusted by the adjusting means includes the hue of color display.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a non-mydriasis fundus camera according to the present invention. The fundus camera of the embodiment includes a photographing unit unit 1 in which an optical system for observation and photographing is housed in a housing suitable for hand-held operation, and a control unit unit 2 in which a photographing light source is arranged while controlling the photographing unit unit 1. Control unit section 2
Color display monitor 3 with a touch panel function
Is provided. The monitor 3 is of a liquid crystal type. Illumination light from the photographing flash light source of the control unit section 2 is guided to the optical system in the photographing unit section 1 via the fiber bundle 4.

FIG. 2 shows the optical system of the fundus camera. Optical system is observation illumination optical system, shooting illumination optical system, observation
It consists of a photographic optical system. <Observation Illumination Optical System> 11 is an illumination light source for observation such as an infrared light emitting diode, 12 is a diffusion plate, 13 is a dichroic mirror, and the dichroic mirror 13 reflects infrared light and at the same time, visible light for photographing. Has the property of transmitting through. A condenser lens 14 and a slit plate 15 are provided with a pinhole opening and a ring slit opening centered on the optical axis at the center. Reference numeral 16 is a light projecting lens, and 17 is a half mirror, which makes the illumination / index projection optical axis and the optical axis of an observation / imaging optical system described later coaxial. Reference numeral 19 denotes a black absorber, which absorbs the illumination light flux that has passed through the half mirror 17 to prevent unnecessary noise light from entering the observation / imaging optical system. Reference numeral 18 denotes an eye to be inspected.

<Photographing illumination optical system> 31 is a flash light source for photographing, 32 is a condenser lens, and the illumination luminous flux for photographing is guided to the photographing unit 1 through the fiber bundle 4. The photographing illumination optical system in the photographing unit section 1 shares the optical path from the dichroic mirror 13 to the half mirror 17 of the observation illumination optical system. <Observation / photographing optical system> 21 is an objective lens for observation, 2
Reference numeral 2 denotes an imaging diaphragm arranged at a position that is conjugate with the pupil of the eye 18 to be inspected. Reference numeral 23 denotes a focusing lens, which can be moved in the optical axis direction by a lens moving mechanism (not shown) in order to perform adjustment according to the refractive power of the eye to be inspected. 24
Is an image forming lens, and 25 is a dichroic mirror. The dichroic mirror 25 has characteristics of reflecting infrared light and transmitting visible light. Reference numeral 26 is a CCD camera for photographing. 27 is a relay lens for extending the optical path, 2
Reference numeral 8 is a mirror for reversing the mirror image inversion, and 29 is an infrared CCD camera for observation.

FIG. 3 shows a block diagram of the control system of this apparatus.
An image control unit 41 includes a CCD camera 29 and a CCD.
The video signal of the camera 26 is input and the analog video signal output to the monitor 3 is switched. In addition, the image control unit 41
Superimposes characters and marks on the video signal of the eye image to be superimposed. The monitor 3 has a display setting unit 3a for changing the brightness, contrast and hue of the display screen, and each setting is changed by the analog DC voltage from the drive circuit unit 44 connected to the system control unit 40. In the case of a liquid crystal monitor, the brightness is controlled by changing the brightness of the backlight of the liquid crystal monitor. Further, a touch panel 42 is provided on the screen of the monitor 3, and the touch position of the touch panel 42 is detected by the touch panel control unit 43. The system control unit 40 includes an image control unit 41, a touch panel control unit 43, a flash lamp 31, a light source 11, a photographing switch 45, a non-volatile memory 46 for digitally storing set values of display conditions of the monitor 3, a large number of images. A storage unit 47 capable of accumulating data is connected.

The operation of the fundus camera having the above structure will be described below. The shooting environment is a dark place where the newspaper characters can barely be read, and the pupils of the eye to be inspected are wide open in the natural mydriatic state. The light source 11 is turned on during observation. The infrared light flux emitted from the light source 11 passes through the diffuser plate 12, the dichroic mirror 13, the condenser lens 14, the slit plate 15, and the half mirror 17, and illuminates the eye to be inspected. The reflected light from the eye to be examined is reflected by the half mirror 1.
7, the objective lens 21, the photographing diaphragm 22, the focusing lens 23, and the image forming lens 24, and after being reflected by the dichroic mirror 25, an image is formed on the image pickup element of the CCD camera 29 by the relay lens 27. The image taken by the CCD camera 29 is displayed on the screen of the monitor 3. When the apparatus is activated, the observation mode is set to the alignment mode in which the monitor 3 is displayed, and the monochrome (black and white) image of the moving image from the CCD camera 29 is displayed on the monitor 3.

The examiner observes the image of the eye to be examined displayed on the monitor 3 for alignment, and the focus lens 23
Is moved to bring the fundus into focus, and then the photographing switch 45 is pressed to cause the flash light source 31 to emit light.
The visible reflected light flux from the fundus illuminated by the visible light by the emission of the flash light source 31 passes through the objective lens 21, the photographing diaphragm 22, the focusing lens 23, and the imaging lens 24 in the same manner as the fundus reflected light flux by the infrared light. And enters the dichroic mirror 25. Dichroic mirror 25
Transmits the visible light flux, the visible fundus reflected light flux is incident on the image pickup element surface of the CCD camera 26 by the imaging lens 24 and forms a fundus image. When the fundus image is obtained by the CCD camera 26, the captured image is temporarily stored in the memory 41a in the image control unit 41, and the image control unit 41 is also stored.
Thus, the screen of the monitor 3 is switched from the display of the alignment image to the display of a color still image which is a photographed image (hereinafter, photographed image display mode). The image switching signal at this time is output from the system control unit 40 by the signal input of the photographing switch 45.

Display conditions (brightness,
To change the contrast, do the following: FIG. 4 shows an example of a screen displayed on the monitor 3 in the alignment mode. When the touch button 53 is touched on this screen, the mode is switched to the environment setting screen mode for setting display conditions. The touch buttons 53 and the like are used on the touch panel 4
The layout is displayed on the screen of the monitor 3 so as to correspond to the touch position for inputting the operation signal individually determined in 2.

FIG. 6 shows a display portion required for adjusting and setting brightness and contrast in the environment setting screen mode. The brightness in the alignment image can be variably adjusted with the buttons 60a and 60b. Further, the contrast can be variably adjusted by the buttons 62a and 62b. The respective adjustment levels are displayed on the display units 60c and 62c, respectively. Similarly, the brightness in the captured image display mode can be variably adjusted with the buttons 61a and 61b, and the contrast can be adjusted with the buttons 63a and 63b.
It can be variably adjusted to b. Each adjustment level is
They are displayed on the display portions 61c and 63c, respectively. The examiner touches according to the display of these buttons. If it is not necessary to adjust both the brightness and the contrast of the screen display, only one of them may be settable.

When the button 65 is touched after adjusting the display conditions, the screen of the monitor 3 is switched to the original alignment screen, and each set value is written and stored in the non-volatile memory 46. By writing to the non-volatile memory 46, the set value is retained even when the device power is cut off, and it is not necessary to perform the resetting even if the examiner turns on the device power next time.

Thereafter, the system control unit 40 synchronizes with the input of a signal to the image control unit 41 to switch the display screen of the monitor 3 between the alignment mode and the photographed image display mode, and sets the display conditions set above. It calls from the non-volatile memory 46 and outputs the digital signal to the drive circuit unit 44. In the drive circuit unit 44, each set value is converted into an analog DC voltage or resistance value by a D / A conversion circuit, a digital potentiometer, or the like. Monitor 3
The analog DC voltage and the resistance value of each set value are input to the display setting unit 3a, and thereby the brightness and contrast of the alignment image displayed on the monitor 3 are changed.

A signal for switching the display screen of the monitor 3 between the alignment mode and the photographed image display mode is input by the button 65 in FIG. When the button 51 is touched on the alignment mode screen of FIG. 4,
Thumbnail images of captured images stored in the storage unit 47 and thumbnail images of captured images stored in the memory 41a are displayed in a list. Since the image at this time is also a color image, the input signal of the button 51 becomes an image switching signal, the set value of the display condition of the captured image display mode is called from the non-volatile memory 46, and the brightness and contrast of the image displayed on the monitor 3 are increased. Is changed. When a desired thumbnail image is touched, the captured image display mode is set, and the designated image is displayed as shown in FIG.

In the photographed image display mode of FIG. 5, when the button 60 is touched, a signal for switching to the alignment mode is input. Further, in the alignment mode, when the photographing switch 45 is pressed to perform photographing as described above, a signal for switching to the photographed image display mode is sent from the system control unit 40 to the image control unit 41.

It should be noted that buttons and respective displays (screen of FIG. 6) for setting the display conditions are superimposed and displayed on the eye image of the moving image in the alignment mode, and the display conditions can be adjusted while watching the moving image. You may do it. That is, the brightness adjustment using the buttons 60a and 60b, the button 6
Every time the contrast is adjusted by 2a and 62b, the brightness and contrast of the superimposed moving image for alignment are changed. Similarly, also in the captured image display mode of FIG. 5, a button for switching to a screen for setting display conditions is provided, and the button is used to display each button and each display unit of FIG. You may do it. Also in this case, each time when adjusting each display condition while watching the captured still image of color,
The display condition of the captured still image that has been superimposed is changed.

When displaying a color image, a button for adjusting the hue may be provided in addition to the buttons for setting the condition of the brightness and the contrast shown in FIG. The system control unit 40 also writes and stores the hue setting value in the non-volatile memory, and reads it in synchronization with the switching signal between the moving image image for alignment and the still image, so that the hue of the image displayed on the monitor 3 is the set value. To be changed to.

[0020]

As described above, according to the present invention,
When switching and displaying a moving image alignment image and a captured (captured) still image on the monitor, it is possible to easily set display conditions suitable for each.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a non-mydriasis fundus camera according to the present invention.

FIG. 2 is a diagram showing an optical system of a fundus camera.

FIG. 3 is a block diagram of a control system of the fundus camera.

FIG. 4 is a diagram showing an example of a screen displayed on a monitor in the alignment mode.

FIG. 5 is a diagram showing an example of a screen displayed on a monitor in a captured image display mode.

FIG. 6 is a diagram showing a display portion required for adjustment setting of brightness and contrast in an environment setting screen mode.

[Explanation of symbols]

1 Shooting unit 2 Control unit section 3 monitors 3a Display setting section 26 CCD camera for photography 29 Infrared CCD camera for observation 40 System control unit 41 Image control unit 42 touch panel 44 Drive circuit section 46 non-volatile memory

Claims (3)

[Claims] 1. An ophthalmologic apparatus including a monitor for displaying an image of an eye to be inspected, wherein first imaging means for taking a still image of the eye to be inspected illuminated by photographing illumination light and eye to be inspected illuminated by the observation illumination light are aligned. Image pickup means for picking up a moving image, a display image switching means for switching an image displayed on the monitor between the moving image and the still image, and a moving image and a still image displayed on the monitor, respectively. Adjustment means for adjusting at least one display condition of brightness or contrast, storage means for digitally storing the adjusted display condition of each image, and display image switching of the display condition stored in the storage means. Setting means for calling based on the switching signal of the means, and setting the image display of the monitor to the called display condition,
An ophthalmologic apparatus comprising: 2. The ophthalmologic apparatus according to claim 1, wherein the screen display of the monitor is adjusted from the screen mode of the moving image or the still image switched by the display image switching unit to the display condition by the adjusting unit. An ophthalmologic apparatus comprising a mode switching means for switching to. 3. The ophthalmic apparatus according to claim 1, wherein the display condition adjusted by the adjusting means includes a hue of color display.