JP2019074589A - Optical equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical device capable of suppressing an influence on a shooting direction due to image shake correction. SOLUTION: The holding portion 253 for holding an optical element 254 and the support portion 252 for movably supporting the holding portion 253 in a direction intersecting an optical axis are provided, and the holding portion 253 is moved to cause image shake of a captured image. The holding unit 253 moves with reference to the support position 262b by the support unit 252, and the support unit 252 changes the support position 262b at a predetermined timing. It has an adjustment unit 604 that brings the shooting direction after changing the support position 262b closer to the shooting direction before the change. [Selection diagram] FIG. 7

Description

  The present invention relates to an optical instrument.

  An imaging apparatus described in Patent Document 1 is known as an optical apparatus such as a camera (imaging apparatus) provided with an image stabilization apparatus that corrects an image blur caused by camera shake or the like, a lens apparatus, and the like. The imaging apparatus described in Patent Document 1 corrects an image blur by moving a movable member holding a correction unit for image blur correction with respect to a fixed member. This image pickup apparatus rolls the ball for moving the movable member in the receiving part, and by moving the ball to a position different from that at the previous activation, the durability against the roughening of the receiving surface of the receiving part by rolling is obtained. I am improving.

Unexamined-Japanese-Patent No. 2010-72562

  However, in the imaging device of Patent Document 1, there is a possibility that the shooting direction may be shifted from the direction before the movement as the ball moves. That is, the image blur correction may affect the shooting direction.

  An object of the present invention is, for example, to provide an optical apparatus capable of suppressing the influence of image blur correction on a photographing direction.

  In order to solve the above problems, the present invention has a holding unit that holds an optical element, and a support unit that supports the holding unit so as to be movable in the direction intersecting the optical axis, and moves the holding unit An optical apparatus including an image shake correction unit that corrects image shake of the image, wherein the holding unit moves on the basis of the support position by the support unit, and the support unit changes the support position at a predetermined timing. And an adjustment unit that brings the shooting direction after the change into the shooting direction before the change.

  According to the present invention, it is possible to provide, for example, an optical apparatus capable of suppressing the influence of image blur correction on a shooting direction.

FIG. 1 is an overall view of an optical device according to a first embodiment. It is a block diagram which shows schematic structure of a lens apparatus, a camera main body, and an adapter apparatus. FIG. 6 is a perspective view of a shake correction unit that constitutes an image shake correction unit. FIG. 6 is an external view of a shake correction unit. The movement group unit of the shake correction units is shown. The fixed unit (support part) of shake correction units is shown. It is a figure explaining the support position of the optical element of an image blurring correction | amendment part and an adjustment part. FIG. 1 is an overall view of an optical device according to the present embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings and the like.
First Embodiment

<Optical equipment>
FIG. 1 is an overall view of an optical device 100 according to the present embodiment. The optical device 100 is a camera system including a camera body 500 and a lens device 200. In the present embodiment, the lens device 200 is an interchangeable lens, and is connected to the camera body 500 via the adapter device 600.

<Lens device>
FIG. 2 is a block diagram showing a schematic configuration of the lens device 200, the camera body 500, and the adapter device 600. As shown in FIG. First, the configuration of the lens device 200 will be described. The lens device 200 includes a lens control unit 201, a contact point 202, an image blur correction unit 203, a focusing unit 207, a zoom unit 210, and a diaphragm unit 213.

(Lens control unit)
The lens control unit 201 receives communication from the camera body 500 through the contact point 202, and controls the shake correction unit 203, the focusing unit 207, the zoom unit 210, and the diaphragm unit 213 according to a command value from the camera body 500. The lens control unit 201 transmits information on the lens to the camera body 500 through the contact point 202.

(Shake correction unit)
The shake correction unit 203 corrects an image shake of a captured image. The shake correction unit 203 includes a shake detection unit 204, a shake correction control unit 205, and a shake correction drive unit 206. The shake detection unit 204 detects a shake of the lens device 200. The shake correction control unit 205 performs control based on the signal from the shake detection unit 204. The shake correction drive unit 206 performs a shake correction operation based on the signal from the shake correction control unit 205.

(Focus part)
The focus unit 207 includes a focus position detection unit 208 and a focus drive unit 209. The focus position detection unit 208 detects the position of the focus lens. The focus drive unit 209 drives the focus lens to a designated position by the command value from the lens control unit 201.

(Zoom section)
The zoom unit 210 includes a zoom position detection unit 211 and a zoom drive unit 212. The zoom position detection unit 211 detects the position of the zoom lens. The zoom drive unit 212 drives the zoom lens to a designated position by the command value from the lens control unit 201.

(Diaphragm)
The diaphragm unit 213 includes a diaphragm position detection unit 214 and a diaphragm drive unit 215. The diaphragm position detection unit 214 detects the position of the diaphragm. The diaphragm drive unit 215 drives the diaphragm to a position set by the command value from the lens control unit 201.

<Adapter device>
Next, the configuration of the adapter device 600 will be described. Adapter apparatus 600 includes an adapter control unit 601, contacts 602 and 603, and an adjustment unit 604. The adjusting unit 604 may be provided in the lens device 200 instead of being provided in the adapter device 600, or may be provided in the camera body 500. The adapter device 600 can be attached to the lens device 200.

(Adapter control unit)
The adapter control unit 601 receives communication from the camera body 500 through the contact point 603, and controls the adjustment unit 604 according to a command value from the camera body 500.

(Adjustment department)
The adjustment unit 604 has the same configuration as the shake correction unit 203 of the lens device 200. The adjustment unit 604 is a shake detection unit 605 that detects shake of the adapter device 600, a shake correction control unit 606 that performs control based on a signal from the shake detection unit 605, and a shake correction based on signals from the shake correction control unit 606. It includes a shake correction drive unit 607 that performs an operation. The shake correction unit 203 may be provided in the adapter device 600, and the adjustment unit 604 may be provided in the lens device 200.

  The adapter device 600 transmits information on the adjustment unit 604 to the camera body 500 through the contact point 603. Further, the information on the side of the lens device 200 is transmitted to the camera body 500 through the contact point 602 and the contact point 603, and the information on the camera body 500 is transmitted to the lens device 200.

<Camera body>
Next, the configuration of the camera body 500 will be described. The camera body 500 includes a camera control unit 501, a contact 502, a photometry unit 503, a distance measurement unit 504, a shutter unit 505, a display unit 506, an imaging unit 507, and a control unit 508. The camera body 500 communicates with the adapter device 600 through the contacts 502.

(Image blur correction)
The shake correction unit 203 will be described with reference to FIGS. 3 to 6. The optical axis direction is taken as the Z axis. The adjusting unit 604 also has the same configuration. FIG. 3 is a perspective view of the shake correction unit 250 that constitutes the shake correction unit 203. FIG. The shake correction unit 250 has a flexible substrate 259. FIG. 4 is an external view of the shake correction unit 250. As shown in FIG. FIG. 5 shows the moving group unit 251 of the shake correction unit 250. FIG. 6 shows the fixed unit (support portion) 252 of the shake correction unit 250.

  As shown in FIG. 5, a shake correction lens (first optical element) 254 is held by the shake correction lens holding frame (holding unit) 253 of the moving group unit 251. The shake correction lens holding frame 253 is provided with a magnet 255 and a yoke 256 (shown in FIG. 4). The magnet 255 is magnetized in the Z direction (optical axis) and includes an inner magnet 255a and an outer magnet 255b. The polarities of the inner magnet 255a and the outer magnet 255b are opposite to each other.

  A coil 257 (shown in FIG. 6) is disposed on the side of the magnet 255 opposite to the yoke 256 in the optical axis direction, and the coil 257 is attached to the base member 258. The coil 257 is connected to a control substrate (not shown) via the flexible substrate 259 (shown in FIG. 3), and an electromagnetic force is generated by supplying a current to the coil 257 to make the shake correction lens holding frame 253 the optical axis. It can be driven in crossing directions (e.g., orthogonal directions).

  The shake correcting lens holding frame 253 and the base member 258 are radially connected by a spring 260. The two springs 260 bias the shake correction lens holding frame 253 substantially in parallel to the optical axis direction, and prevent the rotation of the shake correction lens holding frame 253 about the optical axis and the separation in the optical axis direction. There is.

  The shake correction lens holding frame 253 is biased by two springs 260 against the base member 258 in the optical axis direction with a ball (ball member) 261 (shown in FIG. 6) interposed therebetween. Then, when the pinched ball 261 rolls in the ball receiving portion 262, the shake correction lens holding frame 253 can be moved in the direction crossing the optical axis, whereby the shake correction lens 254 is shifted from the optical axis It can be done. In the present embodiment, ceramic balls are used for the balls 261 and molding materials are used for the ball receiving portions 262. The ball receiver 262 may be provided on the moving group unit 251 side.

  The Hall elements 263 are elements mounted on the flexible substrate 259, arranged at two locations separated by 90 ° in the circumferential direction, and connected to a control device (not shown) via the flexible substrate 259.

  The magnetic field generated by the magnet 254 is detected by the control substrate as the output of the two Hall elements 263. When the shake correction lens holding frame 253 moves, the magnetic field passing through the Hall element 263 changes, whereby the Hall element output changes, and the position of the shake correction lens holding frame 253 can be detected.

(Adjusting the shooting direction)
FIG. 7 is a view for explaining the support positions of the optical elements of the shake correction unit 203 and the adjustment unit 604. The shake correction lens (optical element) 254 of the shake correction unit 203 is held by a shake correction lens holding frame (holding unit) 253. The shake correction lens holding frame 253 is supported by balls 261 rolling in the ball receiving portion 262 provided in the fixed unit (first support portion) 252.

  In the case shown in FIG. 7, the center of the ball 261 is at the top left vertex 262 b of the rectangular area centered on the center position 262 a in the ball receiving portion 262. The shake correction lens holding frame 253 is movably supported in a direction intersecting the optical axis of the first optical element by the fixing unit 252 with the position where the ball 261 and the shake correction lens holding frame 253 contact at the vertex 262b as a support position. Be done. The shake correction lens holding frame 253 moves with reference to the vertex 262 b.

  On the other hand, the holding part holding the optical element (second optical element) of the adjustment part 604 is supported by the second support part similar to the fixing unit (first support part) 252. The second support portion has a ball 661 rolling in the ball receiving portion 662 shown in FIG. In the case shown in FIG. 7, the center of the ball 661 is at the lower right vertex 662 d of the rectangular area centered on the center position 662 a in the ball receiving portion 662. The optical element of the adjustment unit 604 is supported movably in the direction intersecting the optical axis of the second optical element by the second support portion, with the position at which the ball 661 contacts the support portion at the apex 662 d as a support position. Ru. The holding unit holding the second optical element moves on the basis of the apex 662b.

  When the shake correction unit 250 is driven for a long period of time, the ball 261 may wear and roughen the receiving surface of the ball receiving portion 262 and the shake correction performance may be degraded. Therefore, the fixing unit 252 changes the position of the ball 261 to change the support position for supporting the shake correction lens holding frame 253 at a predetermined timing. By driving in this manner, it is possible to suppress a decrease in durability due to the balls 261 continuing to move and wear with the same position in the ball receiving portion 262 as the center position.

  Here, by changing the support position of the shake correction lens holding frame 253, the shooting direction of the optical device 100 is shifted. In the present embodiment, the adjustment unit 604 performs adjustment such that the shooting direction after the support position of the shake correction lens holding frame 253 is changed approaches the shooting direction before the change. For example, the adjustment is made by changing the support position of the optical element as shown in FIG. As a result, it is possible to realize an optical apparatus capable of suppressing the influence of the image blur correction on the photographing direction.

  The support position of the shake correction lens holding frame 253 is changed to, for example, an upper left vertex 262b, an upper right vertex 262e, a lower right vertex 262d, and a lower left vertex 262c at a predetermined timing. In response to the change of the support position of the shake correction lens holding frame 253, the support position of the optical element of the adjustment unit 604 is also changed. In the example of FIG. 7, although the positional relationship of each support position is symmetrical with respect to the center of a ball receiving part, it is not restricted to this.

The predetermined timing of changing the support position of the shake correction lens holding frame 253 can be determined based on the frequency of image shake correction or the use period of the optical device 100. For example, if the optical device 100 is a surveillance camera fixed to a wall, the predetermined timing may be set every month. When the optical device 100 is a fixed camera whose use period is not determined yet, the support position may be changed at all times.
Second Embodiment

  In the present embodiment, an adjustment unit for adjusting the shift in the photographing direction is provided in the camera body, and the adapter is omitted. FIG. 8 is an overall view of an optical device 700 according to the present embodiment. The optical apparatus 700 is a camera system including a camera body 800 and a lens apparatus 200. The same components as those in the first embodiment are given the same reference numerals, and the description thereof is omitted.

  The camera body 800 includes a camera control unit 801, a contact 802, an adjustment unit 804, a photometry unit 813, a distance measurement unit 814, a shutter unit 815, a display unit 816, and a control unit 818. The camera body 800 communicates with the lens apparatus 200 through the contact point 802.

  The adjustment unit 804 drives the imaging unit 817 based on signals from the shake detection unit 805 that detects shake, a shake correction control unit 806 that performs control based on signals from the shake detection unit 805, and a shake correction control unit 806. It includes a shake correction drive unit 807 that performs a shake correction operation.

  Image blur correction and adjustment of the shooting direction are performed in the same manner as in the first embodiment. The arrangement of the adjustment unit 804 and the shake correction unit 203 may be interchanged. Further, the adjustment unit 804 may be provided in the lens device 200.

  Further, in the present embodiment, the adjustment unit 804 drives the imaging unit 817 to adjust the imaging direction, but the adjustment is performed by shifting the cutout range on the input image vertically and horizontally in the imaging unit 817. It is also good.

  Although the adjustment unit including the optical element is used in the above embodiment, an adjustment unit that adjusts the shooting direction by driving the lens or the camera in the pan direction or the tilt direction may be used. For example, in the configuration of the first embodiment, a drive unit that drives the lens in the pan direction or the tilt direction in the adapter device 600 can be used as the adjustment unit. Further, in the second embodiment, a drive unit for driving the camera body 800 in the pan direction or the tilt direction may be further provided, and the drive unit may be used as an adjustment unit.

  The shake correction unit 203 and the adjustment unit 604 in the above embodiment may be provided in the adapter device 600. In this case, the adapter device 600 moves the holding unit that holds the optical element (shake correction lens), the supporting unit that supports the holding unit movably in the direction intersecting the optical axis of the optical element, and the holding unit. And a shake correction unit configured to correct an image shake of a photographed image. The holding part moves on the basis of the support position by the support part, and the support part changes the support position at a predetermined timing. The adapter device 600 includes an adjustment unit capable of making the shooting direction after changing the support position approach the shooting direction before the change. Further, the adapter control unit 601 included in the adapter device 600 controls the adjustment unit based on the information on the shake correction unit received from the lens device.

(Other embodiments)
The embodiments of the present invention have been described above, but the present invention is not limited to these embodiments, and various modifications can be made within the scope of the present invention.

100 optics 203 shake correction unit 252 fixed unit (support unit)
253 Shake correction lens holder frame (holder)
604 Adjustment unit

Claims (11)

A holding unit that holds the optical element;
A support portion movably supporting the holding portion in a direction intersecting the optical axis of the optical element;
A shake correction unit configured to move the holding unit to correct an image shake of a photographed image;
The holding unit moves on the basis of a support position by the support unit,
The support portion changes the support position at a predetermined timing,
It has an adjustment unit which can make the shooting direction after changing the support position approach the shooting direction before the change.
Optical equipment characterized by When the optical element held by the holding unit is a first optical element and the support unit is a first support unit,
The adjustment unit supports a second optical element different from the first optical element, and movably supports the second optical element in a direction intersecting the optical axis of the second optical element. And a support portion,
The optical apparatus according to claim 1,   The optical device according to claim 1, wherein the optical device is a lens device.   The optical apparatus according to claim 3, wherein the adjustment unit drives the lens device in a pan direction or a tilt direction. The optical apparatus is a camera system including a camera body and a lens device,
The shake correction unit is provided in the lens device.
The adjustment unit is provided in the camera body.
The optical apparatus according to claim 1 or 2, wherein The optical device is a camera system including a camera body, a lens device, and an adapter device provided between the camera body and the lens device,
The shake correction unit is provided in the lens device.
The adjustment unit is provided in the adapter device.
The optical apparatus according to claim 1 or 2, wherein The optical apparatus is a camera system including a camera body and a lens device,
The shake correction unit is provided in the lens device.
The adjustment unit drives the camera body in a pan direction or a tilt direction.
The optical apparatus according to claim 1, It has a ball member disposed between the support portion and the holding portion,
The supporting position is a position at which the ball member and the holding portion are in contact with each other,
The support portion changes the position of the ball member at a predetermined timing.
The optical apparatus according to any one of claims 1 to 7, characterized in that:   The optical apparatus according to any one of claims 1 to 8, wherein the predetermined timing is determined based on a frequency of the correction or a use period of the optical apparatus. A holding unit for holding an optical element, a support unit for supporting the holding unit so as to be movable in a direction crossing the optical axis of the optical element, and a shake correction for moving the holding unit to correct image blur of a photographed image An adapter device attachable to a lens device for changing the support position at a predetermined timing, the support unit moving on the basis of a support position by the support unit;
The image capturing apparatus further includes an adjustment unit capable of making the shooting direction after changing the support position approach the shooting direction before the change.
An adapter device characterized by And a control unit configured to control the adjustment unit based on the information on the shake correction unit received from the lens device.
The adapter device according to claim 10, characterized in that:

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