JP2014232278A - Shake correction device and observation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shake correction device and an observation device which can be stably started even when it is operated in accordance with lock release by a manual operation.SOLUTION: A control part 71 measures a fixed time required until the output signals of an X-axis angular speed sensor 36 and a Z-axis angular speed sensor 37 become stable by a timer 72 when a shake correction device is started. The control part 71 drives an X-axis actuator 38 and a Z-axis actuator 39 on the basis of angular positions measured by an X-axis angular position sensor 34 and a Z-axis angular position sensor 35 without using the unstable output signals of the x-axis angular speed sensor 36 and the Z-axis angular speed sensor 37 within this measurement time, and moves a correction optical element to a reference position.

Description

  The present invention relates to a shake correction apparatus that corrects a shake of an optical image and an observation apparatus that includes the shake correction apparatus.

  Monoculars and binoculars are known as observation devices used for magnifying and observing an image of a far object. In observation by an observation apparatus, the observation apparatus may vibrate due to camera shake or the like, and the image may be blurred, making observation difficult. For this reason, various observation apparatuses having a function of correcting image blurring have been invented (see, for example, Patent Document 1).

  The observation apparatus described in Patent Literature 1 includes an objective lens and an eyepiece lens fixed to a housing, and a blur correction device that corrects blurring of an image formed by the objective lens and the eyepiece lens. In the shake correction apparatus, a correction optical element rotatably supported around two axes orthogonal to each other within a plane orthogonal to the optical axis of the objective lens and the eyepiece is disposed between the objective lens and the eyepiece. ing. The shake correction apparatus measures an angular position and an angular velocity that change with relative rotation between the housing and the correction optical element for each of two axes by an angular position sensor and an angular velocity sensor, and based on the measurement result. Then, the actuator is driven to rotate the correction optical element about two axes to correct the blurring of the image formed by the objective lens and the eyepiece.

  The observation apparatus described in Patent Document 1 includes a lock mechanism that fixes the correction optical element to the housing in order to prevent the correction optical element from being accidentally rotated and damaged when the shake correction apparatus is not used. I have. The lock mechanism mechanically cooperates with an operation member that is moved to one of a lock position and a release position. When the operation member is moved to the lock position, the correction optical element is moved to the objective lens and the eyepiece. Is locked at a preset reference position between the control member and the correction optical element is unlocked when the operation member is moved to the release position.

  The observation device described in Patent Document 1 includes a power supply control unit that supplies operating power to the shake correction device when a power switch is turned on. Further, when the unlocking operation of the lock mechanism is performed with the power switch not turned on, a spare switch for starting the shake correction device is used before the correction optical element is unlocked. The correction optical element is prevented from being unlocked while the correction device is stopped.

JP 2004-125826 A

  In the observation apparatus described in Patent Document 1, the member that moves toward the release position by the release operation of the lock mechanism has a structure that turns on the spare switch during the movement. Therefore, the delay time from when the auxiliary switch is turned on until the unlocking of the correction optical element is not constant, depending on the mode of the unlocking operation of the locking mechanism. For this reason, for example, in an angular velocity sensor that has difficulty in rising responsiveness when the power is turned on, the correction optical element is often unlocked before the output is stabilized, and the blur correction device remains unstable. Is activated. As a result, there is a problem that the correction optical element rotates more than necessary and the observation target is deviated from the observation field of view, and it takes time until stable observation can be performed. Note that the lock mechanism release operation may be performed after turning on the power switch, or the lock mechanism release operation may be performed slowly on the housing. I can not say.

  An object of the present invention is to provide a shake correction device and an observation device that can be stably activated even when the shake correction device is operated in response to unlocking by a manual operation.

  The blur correction device of the present invention includes a correction optical element, an angular position sensor, each acceleration sensor, an actuator, a power supply control unit, an operation member, a lock mechanism, a state sensor, and a control unit. The correction optical element is disposed between the objective lens and the eyepiece lens fixed to the casing, and is rotatable about two axes orthogonal to each other within a plane orthogonal to the optical axis of the objective lens and the eyepiece lens. It is supported. The angular position sensor and each acceleration sensor measure an angular position and an angular velocity that change with relative rotation between the housing and the correction optical element for each of two axes. The actuator rotates the correction optical element about two axes. The power control unit supplies operating power by turning on the power switch. The operation member is operated to move to either the lock position or the release position, and the lock mechanism is mechanically linked to the movement of the operation member, and the correction optical element is objectively moved when the operation member is moved to the lock position. It locks to a preset reference position between the lens and the eyepiece lens, and unlocks the correction optical element at the reference position when the operation member moves to the release position. The state sensor detects the lock state and the release state of the correction optical element by the lock mechanism, and outputs a lock signal and a release signal, respectively. In response to the release signal, the control unit operates the power supply control unit to supply operating power, drives the actuator in accordance with the angular position, holds the correction optical element at the reference position for a certain period of time, and then sets the angular position and angular velocity. In response to this, the actuator is driven to rotate the correction optical element about two axes to correct the blurring of the image formed by the objective lens and the eyepiece.

  The power supply control unit preferably stops the supply of operating power when the power switch is turned off and a lock signal is output from the state sensor.

  When the power switch is turned on and the lock signal is output from the state sensor, the power supply controller may lower the operating power supplied to the actuator than when the release signal is output from the state sensor. preferable.

  The lock mechanism preferably includes a stop holding member that biases the operation member to stop only at the lock position and the release position.

  The correction optical element is held by an inner holding frame so as to be rotatable around a first axis, and the inner holding frame is held by an outer holding frame which is rotatable around a second axis perpendicular to the first axis. It is preferable.

  The correction optical element is preferably an erecting prism.

  An observation apparatus according to the present invention includes the above-described shake correction device together with a housing, an objective lens and an eyepiece fixed to the housing.

  According to the present invention, for a certain period of time immediately after turning on the blur correction device, the actuator is driven based on the angular position measured by the angular position sensor without using the unstable output signal of the angular velocity sensor, and the correction is performed. Since the optical element is moved to the reference position, the object to be observed can be observed immediately after the power is turned on.

It is a perspective view which shows the external shape of binoculars. It is a horizontal direction sectional view of binoculars. It is vertical direction sectional drawing along the optical axis for left eyes of binoculars. It is a perspective view which shows the structure of a blurring correction apparatus. It is a perspective view which shows the structure of a locking mechanism. It is a perspective view which shows the locked state of a locking mechanism. It is a block diagram which shows the electric constitution of binoculars. It is a flowchart which shows the operation | movement immediately after power activation of a blurring correction apparatus. It is a flowchart which shows the operation | movement at the time of power-off of a blurring correction apparatus.

  In FIG. 1, a binocular 10 that is an example of the observation apparatus of the present invention includes a substantially rectangular parallelepiped casing 11, a pair of objective lens portions 12R and 12L provided on the front and back surfaces of the casing 11, and a pair of objective lenses 12R and 12L. Eyepieces 13R and 13L. The objective lens portions 12R and 12L and the eyepiece lens portions 13R and 13L are respectively disposed along the right-eye optical axis BR and the left-eye optical axis BL set along the front-rear direction (Y direction) of the binoculars 10. And constitutes an observation optical system for enlarging the image of the object to be observed. The binoculars 10 can observe an enlarged image of the object to be observed by holding the casing 11 and directing the objective lens parts 12R and 12L to the object to be observed and looking through the eyepiece parts 13R and 13L.

  The housing 11 has a built-in blur correction device 30 (see FIG. 4) that corrects image blur caused by vibration such as camera shake. A push button type power switch 16 for operating or stopping the shake correction device 30 is provided on the upper left side as viewed from the back side of the housing 11. The power switch 16 outputs an on signal and an off signal according to the operation. On the rear left side of the housing 11, an operation member 17 that is rotated when the correction optical elements 31 </ b> R and 31 </ b> L (see FIG. 4) of the shake correction device 30 are locked or released with respect to the housing 11 is provided. Yes. FIG. 1 shows a state in which the operation member 17 is in a lock position for locking the correction optical elements 31R and 31L, and a position rotated clockwise from the lock position is a release position for releasing the lock. .

  As shown in FIGS. 2 and 3, which represent a horizontal cross section of the binoculars 10 and a vertical cross section along the optical axis BL for the left eye, the eyepiece portions 13R and 13L are respectively provided with an eyepiece lens 20 and the eyepiece lens. An eyepiece tube 21 that holds 20 and a prism holder 22 connected to the eyepiece tube 21 are included. The prism holder 22 holds a bending prism 23 for bending incident light to translate the optical axis, and has a rotation shaft portion 22a. The rotation shaft portion 22a is fitted into an opening provided in the housing 11 so as to be rotatable about the optical axes BR and BL. By using the rotation shaft portion 22a of the prism holder 22 to rotate the eyepiece 21 along the arrow RT, the mutual distance between the pair of eyepieces 20 can be adjusted according to the eye width of the user. it can.

  Each of the objective lens portions 12R and 12L includes an objective lens 26 and an objective cylinder 27 that holds the objective lens 26. 2 and 3, the eyepiece lens 20 and the objective lens 26 are depicted as one lens, but in actuality, both the eyepiece lens 20 and the objective lens 26 are composed of a plurality of lens groups.

  As shown in FIG. 4, the blur correction device 30 is disposed between the objective lens portions 12R and 12L and the eyepiece lens portions 13R and 13L. The shake correction device 30 includes correction optical elements 31R and 31L that are rotatably supported around two axes orthogonal to each other in a plane orthogonal to the right-eye optical axis BR and the left-eye optical axis BL. The correction optical elements 31R and 31L are erect prisms of, for example, a roof prism type, and return an inverted image formed by the objective lens 26 and the eyepiece lens 20 to an erect image. As the correction optical elements 31R and 31L, poro prism type erecting prisms may be used, or erecting lenses may be used instead of the erecting prisms.

  The correction optical elements 31R and 31L are supported by an inner holding frame 32 and an outer holding frame 33 that holds the inner holding frame 32. The inner holding frame 32 has a rectangular parallelepiped shape, and its longitudinal direction is arranged along a horizontal direction (X direction) orthogonal to the right-eye optical axis BR and the left-eye optical axis BL. The inner holding frame 32 is rotated in the direction indicated by the arrow RA around the Z axis (first axis) (azimuth direction) by a rotation shaft 46 provided on the outer holding frame 33 along the Z direction orthogonal to the X direction and the Y direction. ) Can be rotated.

  The inner holding frame 32 is provided with element accommodating portions 32R and 32L arranged on the right-eye optical axis BR and the left-eye optical axis BL, respectively. The correction optical elements 31R and 31L are accommodated in the element accommodating portions 32R and 32L, respectively. The correction optical elements 31R and 31L accommodated in the element accommodating portions 32R and 32L are provided on the front surface (surface with respect to the objective lens 26) and the back surface (surface with respect to the eyepiece lens 20) of the inner holding frame 32, and the optical axis BR for the right eye and the left eye. Openings 32Ra and 32La that are exposed on the optical axis BL are provided.

  The outer holding frame 33 has a rectangular shape similar to the inner holding frame 32, and the longitudinal direction thereof is arranged along the X direction. The outer holding frame 33 has a frame shape having only an upper surface portion and a lower surface portion, and side portions parallel to the optical axis BR for the right eye and the optical axis BL for the left eye, and the inner holding frame 32 is turned inside. It is housed freely. The outer holding frame 33 is rotatable in the direction of the arrow RE (elevation direction) around the X axis (second axis) by a rotation shaft 43 provided along the X direction. The rotation shaft 43 is supported by a pair of bearing portions 45R and 45L provided in the housing 11. Accordingly, the correction optical elements 31R and 31L are supported so as to be rotatable around two axes X and Z that are orthogonal to each other in a plane orthogonal to the optical axis BR for the right eye and the optical axis BL for the left eye. The

  The shake correction apparatus 30 measures an angular position and an angular velocity that change with relative rotation between the housing 11 and the correction optical elements 31R and 31L for each of two axes (Z axis and X axis). A Z-axis angular position sensor 35, a Z-axis angular velocity sensor 37, an X-axis angular position sensor 34, and an X-axis angular velocity sensor 36 are provided. The Z-axis angular position sensor 35 is attached to the outer holding frame 33 and connected to one end of the rotating shaft 46, and measures the angular position of the inner holding frame 32 around the Z axis. The Z-axis angular velocity sensor 37 is provided in front of the inner holding frame 32 and detects the angular velocity of the inner holding frame 32 around the Z axis. The X-axis angular position sensor 34 is attached to the bearing portion 45R and connected to one end of the rotating shaft 43, and measures the angular position of the outer holding frame 33 around the X-axis. The X-axis angular velocity sensor 36 is provided on the upper surface of the inner wall of the outer holding frame 33 and detects the angular velocity of the outer holding frame 33 around the X axis.

  As the X-axis angular position sensor 34 and the Z-axis angular position sensor 35, for example, a rotary position sensor, a resolver, a synchro, a rotary encoder, or the like is used. As the X-axis angular velocity sensor 36 and the Z-axis angular velocity sensor 37, a piezoelectric vibration gyro sensor having a columnar columnar vibrator and a plurality of piezoelectric ceramics and using Coriolis force is used. Instead of the piezoelectric vibration gyro sensor using a cylindrical vibrator, a piezoelectric vibration gyro sensor using a triangular prism vibrator, a quadrangular prism vibrator, or a tuning fork vibrator may be used.

  The shake correction apparatus 30 includes a Z-axis actuator 39 and an X-axis actuator 38 that rotate the correction optical elements 31R and 31L about two axes (Z-axis and X-axis). The Z-axis actuator 39 is a motor, for example, and is attached to the outer holding frame 33 and connected to one end of the rotating shaft 46. Similarly to the Z-axis actuator 39, the X-axis actuator 38 is a motor, and is attached to the bearing portion 45L and connected to one end of the rotating shaft 43. The Z-axis actuator 39 and the X-axis actuator 38 rotate the inner holding frame 32 and the outer holding frame 33 via the rotating shafts 46 and 43, respectively, thereby moving the correction optical elements 31R and 31L to the Z-axis and X-axis. Rotate around the axis.

  As shown in FIG. 5, the shake correction device 30 includes a lock mechanism 49 between the eyepiece portions 13R and 13L in the housing 11 and the correction optical elements 31R and 31L. The lock mechanism 49 mechanically cooperates with the movement of the operation member 17 to bring the correction optical elements 31R and 31L to the reference positions set between the objective lens portions 12R and 12L and the eyepiece lens portions 13R and 13L. Lock or unlock. The reference positions of the correction optical elements 31R and 31L are the optical axes of the erecting prisms used as the correction optical elements 31R and 31L, the optical axis BR for the right eye of the objective lens units 12R and 12L and the eyepiece lens units 13R and 13L, and the left A position that is parallel to the optical axis BL for the eye. The lock mechanism 49 includes a gripping mechanism 50, a slide rack 53, a stop holding member 54, and a gear 55.

  The gripping mechanism 50 locks and unlocks the correction optical elements 31 </ b> R and 31 </ b> L by gripping and unlocking the fixing pin 58 provided on the back surface of the inner holding frame 32. The gripping mechanism 50 includes a substrate unit 51 fixed to the housing 11, a rotation ring 52 disposed on the back side (eyepiece lens side) of the substrate unit 51, and between the substrate unit 51 and the rotation ring 52. And three claw members 56 (see FIG. 6) incorporated in the. Circular openings 51 a and 52 a into which the fixing pins 58 are inserted are provided in the substrate portion 51 and the rotation ring 52, respectively. The rotation ring 52 is provided so as to be rotatable around the opening 52 a with respect to the substrate portion 51. The three claw members 56 are supported by a rotation shaft (not shown) provided on the substrate portion 51 and the rotation ring 52, and the rotation of the substrate portion 51 is performed by the rotation of the rotation ring 52. It rotates with respect to the shaft and protrudes or retracts into the openings 51a and 52a.

  At the retracted position where the claw member 56 is retracted from the openings 51a and 52a, the fixing pin 58 is movable within the openings 51a and 52a, so that the correction optical elements 31R and 31L are unlocked. Further, as shown in FIG. 6, at the gripping position where the claw member 56 protrudes into the openings 51a and 52a, the fixing pin 58 is gripped by the claw member 56, so that the correction optical elements 31R and 31L are locked at the reference position. The

  The slide rack 53 drives the gripping mechanism 50 by moving in accordance with a rotation operation performed on the operation member 17. The slide rack 53 is supported by the housing 11 so as to be slidable in the X direction. A rack gear 53 b extending in the X direction is provided on the upper surface on one end side of the slide rack 53. A gear 55 provided coaxially with the operation member 17 is engaged with the rack gear 53b. The gear 55 is rotated in the same direction by the rotation operation of the operation member 17, and the rack gear 53 b is moved accordingly, so that the slide rack 53 is slid in the X direction.

  A pair of protrusions 53 a extending in the Z direction are provided on the upper surface of the other end side of the slide rack 53. A link pin 52b erected along the Y direction on the back surface of the rotation ring 52 is inserted between the pair of protrusions 53a. Therefore, when the slide rack 53 slides, the rotation ring 52 rotates in conjunction with the slide rack 53. When the rotation ring 52 rotates, the three claw members 56 move between the gripping position and the retracted position, and the fixing pin 58 is gripped or released, so that the correction optical elements 31R and 31L are locked or locked at the reference position. Canceled.

  Between the pair of protrusions 53a of the slide rack 53 and the rack gear 53b, a protrusion 53c protruding in the Z direction is provided. A state sensor 64 composed of a micro switch is arranged on the side of the projection 53c in the X direction. The state sensor 64 is used to detect the start start timing of the shake correction device 30. The state sensor 64 detects the lock and release of the correction optical elements 31R and 31L and outputs a lock signal or a release signal when the slide rack 53 slides and is pressed or released by the protrusion 53c. In addition, as the state sensor 64, a non-contact type sensor using light or magnetism may be used in addition to a contact type detection switch such as a micro switch.

  When the operation member 17 is stopped halfway between the lock position and the release position, the slide rack 53 may unlock the correction optical elements 31R and 31L and stop at a position that is not detected by the state sensor 64. In such a state, the correction optical elements 31R and 31L are free to rotate in the housing 11 and may be damaged. Therefore, in this embodiment, the slide rack 53 is urged toward both ends in the slide direction by the stop holding member 54 so that the slide rack 53 is not stopped at the above-described midway position. The stop holding member 54 is, for example, a toggle spring formed by bending a thin metal wire, and when the slide rack 53 is stopped in the middle of sliding, the stop holding member 54 is urged toward the end in the sliding direction to forcibly slide.

  The shake correction apparatus 30 includes a control board 40 for controlling the shake correction apparatus 30 below the correction optical elements 31R and 31L. The control board 40 is provided with a control circuit 66 shown in FIG. The control circuit 66 includes a CPU 67 that controls the shake correction apparatus 30 in an integrated manner, a ROM 68 that stores a control program, a power supply control unit 69, and a power supply 73 such as a battery. The CPU 67 functions as the control unit 71 and the timer 72 of the shake correction apparatus 30 by operating based on the control program. A power switch 16 and a state sensor 64 are connected to the CPU 67 and the latch relay 70.

  In response to the ON signal of the power switch 16 or the release signal of the state sensor 64, the power supply control unit 69 sends the CPU 67, the X-axis angular position sensor 34, the Z-axis angular position sensor 35, and the X-axis angular velocity sensor 36 from the power supply 73. In addition, operating power is supplied to the Z-axis angular velocity sensor 37, the X-axis actuator 38, and the Z-axis actuator 39 to operate the shake correction device 30.

  The control unit 71 performs an anti-vibration process in order to correct a blur generated in an image formed by the objective lens 26 and the eyepiece lens 20 due to vibration such as camera shake. This anti-vibration processing is performed by measuring the angular position of the correction optical elements 31R and 31L around the X axis and the Z axis using the X axis angular position sensor 34 and the Z axis angular position sensor 35, and the X axis angular velocity sensor 36 and The angular velocity is measured by the Z-axis angular velocity sensor 37, the X-axis actuator 38 and the Z-axis actuator 39 are driven based on these measurement results, and the correction optical elements 31R and 31L are rotated.

  In the X-axis angular velocity sensor 36 and the Z-axis angular velocity sensor 37, the signal values of the output signals are not stable for a few seconds after the power is turned on. Therefore, when the correction optical elements 31R and 31L are driven based on this unstable output signal, the correction optical elements 31R and 31L move to the end of the movable range, and the field of view of the observation optical system greatly deviates from the object to be observed. Therefore, there arises a problem that the object to be observed cannot be observed for a few seconds after the power is turned on.

  In order to solve this problem, the controller 71 is measured by the X-axis angular position sensor 34 for a certain period of time from the start of operation of the X-axis angular velocity sensor 36 and the Z-axis angular velocity sensor 37 until the output signal becomes stable. Based on the angular position around the X-axis and the angular position around the Z-axis measured by the Z-axis angular position sensor 35, the X-axis actuator 38 and the Z-axis actuator 39 are driven to correct optical elements 31R and 31L. Is moved to the reference position. The above-described measurement for a certain time is performed by the timer 72. Thus, since the output signals of the X-axis angular velocity sensor 36 and the Z-axis angular velocity sensor 37 are not used within a certain time, the object to be observed can be observed immediately after the binoculars 10 are turned on.

  If the power switch 16 is turned on and the output signals of the X-axis angular velocity sensor 36 and the Z-axis angular velocity sensor 37 are stabilized, the correction optical elements 31R and 31L are unlocked, and the above-described problem does not occur. . However, depending on the user, it is conceivable that the correction optical elements 31R and 31L are unlocked immediately after the power switch 16 is turned on. The control to move to is executed.

  Further, when the shake correction device 30 is turned off while the correction optical elements 31R and 31L are unlocked, the correction optical elements 31R and 31L are free to rotate within the housing 11 and are damaged. There is a fear. Therefore, in this embodiment, when the supply of operating power to the shake correction device 30 by the power supply control unit 69 is started by the latch operation of the latch relay 70, the power switch 16 is turned off and the state sensor 64 is locked. The supply of operating power to the shake correction device 30 by the power supply control unit 69 is maintained until the AND state in which both signals are input. As a result, even if the lock signal is input from the state sensor 64 while the ON signal is input from the power switch 16, or the ON signal is input from the power switch 16 while the release signal is input from the state sensor 64. Even if this is done, the supply of operating power to the shake correction device 30 by the power supply control unit 69 is not stopped. Therefore, the shake correction apparatus 30 is not turned off in a state where the correction optical elements 31R and 31L are unlocked.

  The power supply control unit 69 supplies the X-axis actuator 38 and the Z-axis actuator 39 when the correction optical elements 31R and 31L are locked and the operation of the shake correction device 30 is started by turning on the power switch 16. A process (standby process) is performed for reducing the power compared to the anti-vibration process. By this standby processing, the operation sound of the X-axis actuator 38 and the Z-axis actuator 39 can be reduced, and the power consumption can be reduced.

  Next, the operation of the above embodiment will be described with reference to the flowcharts of FIGS. When the binoculars 10 are not used, since the operation member 17 is in the locked position, the correction optical elements 31R and 31L are locked at the reference position by the lock mechanism 49 (YES in S10). Further, since the power switch 16 is not turned on, the shake correction device 30 is not operating (YES in S11).

  When the operation member 17 is rotated to the release position, the gear 55 rotates in the same direction, and the slide rack 53 in which the rack gear 53b is engaged with the gear 55 starts to slide. Since the slide rack 53 is urged by the stop holding member 54 from the middle of the slide and moves to the end in the slide direction, the slide rack 53 is not stopped during the slide. As the slide rack 53 slides, the rotation ring 52 of the gripping mechanism 50 rotates, and the three claw members 56 move to the retracted position where they are retracted from the openings 51a and 52a. Thereby, the lock | rock of the correction | amendment optical elements 31R and 31L by the lock mechanism 49 is cancelled | released (it is NO at S10).

  When the lock mechanism 49 is released and a release signal is input from the state sensor 64 (NO in S10), or the power switch 16 is turned on and an ON signal is input (YES in S11). ), Operating power is supplied from the power source 73 to each part of the shake correction apparatus 30 (S12).

  The CPU 67 operates based on the control program stored in the ROM 68 and functions as the control unit 71 and the timer 72. The control unit 71 starts the timer 72 and measures a certain time required for the output signals of the X-axis angular velocity sensor 36 and the Z-axis angular velocity sensor 37 to become stable (S13). The control unit 71 includes an angular position around the X axis measured by the X axis angular position sensor 34 and an angular position around the Z axis measured by the Z axis angular position sensor 35 within the measurement time of the timer 72. Based on the above, the X-axis actuator 38 and the Z-axis actuator 39 are driven to move the correction optical elements 31R and 31L to the reference position (S14).

  When the measurement by the timer 72 is completed (YES in S15), the control unit 71 determines the locked state of the correction optical elements 31R and 31L based on the output signal of the state sensor 64 (S16). When the release signal is input from the state sensor 64, the control unit 71 determines that the correction optical elements 31R and 31L are unlocked (NO in S16), and prevents the image blurring from being corrected. The shaking process is started (S17). In this anti-vibration processing, the control unit 71 uses the X-axis angular position sensor 34, the Z-axis angular position sensor 35, the X-axis angular velocity sensor 36, and the Z-axis angular velocity sensor 37 around the X-axis and the Z-axis. Based on the angular position and angular velocity around the axis, the X-axis actuator 38 and the Z-axis actuator 39 are driven to displace the correction optical elements 31R and 31L.

  Further, when the lock signal is input from the state sensor 64, the power supply control unit 69 determines that the correction optical elements 31R and 31L are locked (YES in S16), and executes standby processing (S18). ). In the standby process, the power supply control unit 69 reduces the operating power supplied to the X-axis actuator 38 and the Z-axis actuator 39 as compared to the vibration-proofing process.

  When both the ON signal of the power switch 16 and the release signal of the state sensor 64 are input, the power controller 69 generates an OFF signal of the power switch 16 and a lock signal of the state sensor 64 by the latch relay 70. The supply of operating power to the shake correction apparatus 30 is maintained until both are input. Even if the power switch 16 is turned off and an off signal is input, the power controller 69 does not stop the supply of operating power to the shake correction apparatus 30 (NO in S20). Similarly, even if the operation member 17 is rotated to the lock position and a lock signal is input from the state sensor 64, the supply of operating power to the shake correction device 30 is not stopped (NO in S20). When the off signal of the power switch 16 and the lock signal of the state sensor 64 are input (YES in S20), the latch operation of the latch relay 70 is released, so that the power control unit 69 transfers to the shake correction device 30. The supply of operating power is stopped (S21).

  According to the above embodiment, the X-axis angular position is not used for a certain period of time immediately after the shake correction device 30 is turned on without using unstable output signals of the X-axis angular velocity sensor 36 and the Z-axis angular velocity sensor 37. Since the correction optical elements 31R and 31L are moved to the reference position based on the output signals of the sensor 34 and the Z-axis angular position sensor 35, the observation object can be observed immediately after the power is turned on. Further, the supply of operating power to the shake correction device 30 by the power supply control unit 69 is maintained until the AND state in which both the OFF signal of the power switch 16 and the lock signal of the state sensor 64 are input, the housing 11 The correction optical elements 31R and 31L are not freely rotated.

  Further, when the correction optical elements 31R and 31L are locked when the power switch 16 is turned on, the power supplied to the X-axis actuator 38 and the Z-axis actuator 39 is reduced as compared with that during the image stabilization process. The operation sound of the shaft actuator 38 and the Z-axis actuator 39 can be reduced, and the power consumption can be reduced. Further, the slide rack 53 is urged toward both ends in the sliding direction by the stop holding member 54 so that the slide rack 53 is not stopped at a midway position. Therefore, the correction optical elements 31R and 31L in the casing 11 The rotation is not free.

  In the above embodiment, the correction optical elements 31R and 31L are locked and unlocked using the fixing pin 58 and the gripping mechanism 50 of the inner holding frame 32. For example, the lock pin whose tip is conical is held inside. Various locking mechanisms such as a mechanism for locking the correction optical elements 31R and 31L while positioning them at the reference position by engaging with a conical hole provided in the frame 32 can be used. The state sensor 64 detects the locked state of the correction optical elements 31R and 31L based on the position of the slide rack 53, but detects the locked state from the positions of other members such as the operation member 17 and the gripping mechanism 50. Also good. Although binoculars have been described as an example, the present invention can also be applied to monoculars.

DESCRIPTION OF SYMBOLS 10 Binoculars 11 Case 12R, 12L Objective lens part 13R, 13L Eyepiece part 16 Power switch 17 Operation member 30 Shake correction device 31R, 31L Correction optical element 34 X-axis angular position sensor 35 Z-axis angular position sensor 36 X-axis Angular velocity sensor 37 Z-axis angular velocity sensor 38 X-axis actuator 39 Z-axis actuator 49 Lock mechanism 54 Stop holding member 64 Status sensor 66 Control circuit 69 Power supply control unit 70 Latch relay 71 Control unit 72 Timer

Claims (7)

Arranged between an objective lens and an eyepiece fixed to the housing, and supported rotatably around two axes orthogonal to each other within a plane orthogonal to the optical axis of the objective lens and the eyepiece A correction optical element;
An angular position sensor and an angular velocity sensor that measure an angular position and an angular velocity that change with relative rotation between the housing and the correction optical element for each of the two axes;
An actuator for rotating the correction optical element about the two axes;
A power control unit that supplies operating power by turning on the power switch;
An operation member that is moved to either the lock position or the release position;
When the operation member is in the locked position, the correction optical element is locked at a reference position set between the objective lens and the eyepiece when the operation member is in the locked position. A lock mechanism for unlocking the correction optical element when the operation member is in the release position;
A state sensor that detects a lock state and a release state of the correction optical element by the lock mechanism and outputs a lock signal or a release signal;
In response to the release signal, the power control unit is operated to supply operating power, the actuator is driven according to the angular position, and the correction optical element is held at the reference position for a predetermined time, and then the angle A controller that drives the actuator in accordance with the position and the angular velocity to rotate the correction optical element around the two axes and corrects blurring of an image formed by the objective lens and the eyepiece;
An image stabilization apparatus comprising:   The blur correction apparatus according to claim 1, wherein the power control unit stops supplying operating power when the power switch is turned off and the lock signal is output from the state sensor.   The power control unit outputs operating power supplied to the actuator when the lock signal is output from the state sensor when the power switch is turned on and the release signal is output from the state sensor. The blur correction device according to claim 1, wherein the blur correction device is set lower than the case.   The blur correction device according to claim 1, wherein the lock mechanism includes a stop holding member that biases the operation member to stop only at the lock position and the release position.   The correction optical element is held on an inner holding frame so as to be rotatable around a first axis, and the inner holding frame is rotatable on a second axis perpendicular to the first axis. The shake correction apparatus according to claim 1, wherein the shake correction apparatus is held by the camera.   The blur correction apparatus according to claim 1, wherein the correction optical element is an erecting prism.   An observation apparatus provided with a housing | casing, the objective lens and eyepiece lens which were fixed to the said housing | casing, and the blurring correction apparatus as described in any one of Claims 1-6.