JPH07191362A - Camera controller - Google Patents

Abstract

PURPOSE:To provide a camera controller capable of constituting a vibration- proof camera by attaching a lens barrel with a vibration-proof device even in the case of a camera body of such a type that an SW1 signal and a SW2 signal generated by half depression, 6 and full depression of a release button are not transmitted to the lens barrel side. CONSTITUTION:Since this controller is provided with a vibration discrimination means 19 (camera operation decision means) deciding camera operation based on output generated from the vibration detection means 11 of the vibration-proof device, the interlocking control between the vibration-proof device and the lens barrel, and the operation of respective parts in the camera body and the vibration-proof device can be performed even though the SW1 signal and the SW2 signal are not transmitted from the camera body. Thus, the vibration-proof camera is constituted even in the case of the camera body which is not designed as the vibration-proof camera in the conventional manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera control device, and more particularly to a camera control device having a function of controlling a vibration isolation device mounted on the camera and each part of the camera.

[0002]

2. Description of the Related Art Recently, a video camera having an image blur prevention function for preventing image blur caused by camera shake at the time of shooting has been commercialized, and a research and development of a still camera having an image blur prevention function has been conducted. It is being advanced.

Various types of image blur preventing devices (hereinafter referred to as image stabilizing devices) for preventing image blurring even when the camera vibrates during shooting have already been proposed. .

The outline of a known vibration damping device proposed by the present applicant will be described below with reference to FIG.

FIG. 8 is a schematic view of a lens barrel equipped with an anti-vibration device proposed by the present applicant, and is a diagram for explaining an outline of a part of the anti-vibration device.

In the figure, reference numeral 82 is an outer cylinder of the lens barrel, 84 is an inner cylinder housed in the outer cylinder 82, and 83p is attached to the outer peripheral surface of the inner cylinder 84 and is a vertical lens barrel. Angular displacement detecting means for detecting the angular displacement of the shake P (pitching), 83y is attached to the outer peripheral surface of the inner cylinder 84 and detects the angular displacement of the lateral shake Y (yaw) of the lens barrel. Detecting means 80 is a correction lens for preventing image blurring on the surface of the film 88 even if the lens barrel shakes. 81 holds the lens 80 so that it can move vertically and laterally. A correction lens holding frame, which is arranged facing the rear end surface of the inner cylinder 84, 86p is attached to the holding frame 81 and is one of first electromagnetic driving means for moving the holding frame 81 in the vertical direction. Coil forming part, 86 Is a coil which is attached to the holding frame 81 and constitutes a part of a second electromagnetic driving means for moving the holding frame 81 in the lateral direction, and 87p is a coil which vertically moves the holding frame 81. Vertical position detecting means for detecting the position and movement amount when moved by the driving means, and 87y a lateral movement amount when the holding frame 81 is moved laterally by the second electromagnetic driving means. And lateral position detecting means for detecting the position. The angular displacement detection means 83p and 83y are vibration detection means configured by a detection means configured by a vibration gyro which is a known angular velocity meter and an integration circuit that integrates the angular velocity output and converts it into an angular displacement. Further, the position detecting means 87p and 87y for detecting the position change of the correction lens holding frame 81 and the like are a light projecting element formed of an infrared light emitting diode and a known PSD.
The outputs of the angular displacement detection means 83p and 83y (that is, the vibration sensor) and the output signal of the correction lens position detection means (PSD), which are composed of a light receiving element formed of (Position sensing device), are output to a vibration control device control circuit (not shown). After a predetermined process is performed in the control circuit, the position control of the correction lens 80 is performed by driving the two electromagnetic driving means including the coils 86p and 86y by the output signal from the control circuit. Drive control is performed. Hereinafter, a structure including the correction lens 80 and the lens holding frame 81 will be referred to as a correction optical unit 85.

Next, a specific structural example of the lens barrel described in FIG. 8 will be described with reference to FIGS. 9 to 10. 9 and 10 are exploded perspective views of another lens barrel having substantially the same structure as the lens barrel described in FIG. 8 as seen from the object (that is, from the front) in FIG. The outer cylinder 82 and the angular displacement detecting means 83p and 83y are not shown. Further, a concrete example of the image stabilization device control circuit not shown in FIG. 8 is shown in FIG.

Further, since the reference numerals used in FIG. 8 are different from the reference numerals used in FIGS. 9 to 10, the structure indicated by the reference numeral in FIG. 8 is given before the description of FIGS. 9 to 10. Correspondences between the elements and the components displayed in FIGS. 9 to 10 will be described in advance.

9 and 10, reference numeral 710 is a lens barrel corresponding to the inner cylinder 84 shown in FIG.
8 is a correction lens corresponding to the correction lens 80, 72 is a lens support frame corresponding to the correction lens holding frame 81 of FIG.
The coil 79p attached to the lens support frame 72 is shown in FIG.
Corresponding to the coil 86p of the
The coil 79y attached to is the coil 86y of FIG.
Corresponding to the coil, and the two light projecting elements 76p and 76y attached to the lens supporting frame 72 at two positions are respectively the position detecting elements 78p and 78y such as the PSDs attached to the lens barrel 710. Position detecting means 724 forming a pair and corresponding to the position detecting means 87p and 87y of FIG. 8 is a cover.

As described above, since the correspondence between the structure shown in FIGS. 9 to 10 and the structure already described in FIG. 8 has been clarified, the applicant of the present invention shown in FIGS. A specific example of the prior art will be described.

In FIG. 9, reference numeral 61 is a magnetic pole unit which constitutes a vertical electromagnetic drive means together with the coil 79p.
The magnetic pole unit 61 is disposed in the recess 710pb on the rear end surface of the lens barrel 710, and the yoke 712p ₃ is connected to the coil 79.
It is inserted into p and is fixed to the lens barrel 710. Further, the magnetic pole unit 62 is a magnetic pole unit that constitutes a lateral electromagnetic drive means, and is the concave portion 7 on the rear end surface of the lens barrel 710.
10yb, a yoke 712y ₃ is inserted into the coil 79y and fixed to the lens barrel 710.
The magnetic pole units 61 and 62 are each configured by sandwiching two magnets between three yokes, and the unit 61 includes two magnets 713p between the _three yokes 712p _{1 to} 712p _3. Is clamped and held, and the magnetic pole unit 62 includes three yokes 712y _{1 to} 71y.
Two magnet 713y during 2y ₃ is in the clamp holding structure.

The correction lens support frame 72 is held by a support arm 75 shown in FIG. 10 and is supported by the arm 75 so as to be movable in the vertical and horizontal directions.
Reference numeral 5 is attached to a claw portion 710a on the rear end surface of the lens barrel 710.

Reference numeral 63 denotes a locking device or locking means for inhibiting the movement of the correction lens support frame 72, and an electromagnetic plunger 719 for locking and unlocking the support frame 72 and an unlocked state. And a spring 720 for moving the support frame 72, which is arranged so as to face a lower portion on the rear end side of the support frame 72 and is fastened with a screw to the rear end surface of the lens barrel 710.

Two electromagnetic drive means coils 79p and 7
Correcting optical means drive control circuit 6 for driving and controlling 9y
4 is connected to both coils 79p and 79y, and is also connected to two position detection elements 78p and 78y such as PSD, which are position detection signal output means of the correction lens support frame 72, and a camera control circuit (not shown) and It is also connected to the lens barrel control circuit.

In the above, the correspondence between the configuration shown in FIGS. 9 to 10 and the vibration isolator described in FIG. 8 has been clarified, so that the configuration of the configuration shown in FIGS. 9 to 10 will be described below. Details of a prior art example of the shaking device will be described.

As shown in FIG. 10, the correction lens support frame 7
A bearing 73y is press-fitted into the bearing 2, and a support shaft 74y is axially slidably supported by the bearing 73y. The recess 74ya of the support shaft 74y is fitted into the claw 75a of the support arm 75 shown in FIG. Further, as shown in FIG. 10, the bearing 73p is press-fitted into the support arm 75, and the support shaft 74p is supported so as to be slidable in the axial direction.

Projector mounting holes 72pa, 72 of the support frame 72
In ya, light projecting elements 76p and 76y such as IRED-LEDs.
Are bonded, and the terminals are soldered to the lids 77p and 77y (which are bonded to the support frame 72) also serving as the connection board. The support frame 72 is provided with slits 72pb and 72yb, and the light projected by the light projecting elements 76p and 76y is slit 72pb.
PSD (position detection element) described later through b and 72yb
It is incident on 78p and 78y.

Coils 79p and 79y are also bonded to the support frame 72, and terminals are soldered to the lids 77p and 77y. Support balls 711 are fitted (three places) in the lens barrel 710, and the recesses 74pa of the support shaft 74p are fitted in the claw portions 710a of the lens barrel 710.

Yokes 712p ₁ , 712p ₂ , 712p
₃ , the magnet 713p is laminated and adhered, and similarly, the yokes 712y ₁ , 712y ₂ , 712y ₃ and the magnet 7 are attached.
13y is also laminated and adhered. Note that the polarities of the magnets are arranged as indicated by arrows 713pa and 713ya.

The yokes 712p ₂ and 712y ₂ are lens barrels 71.
It is screwed into the 0 recessed portions 710pb and 710yb.

Position detection elements 78p and 78y such as PSD are adhered to the sensor seats 714p and 714y (714y is not shown), covered with sensor masks 715p and 715y, and a flexible printed circuit board (hereinafter abbreviated as flexible) 71.
The terminals of the position detecting elements 78p and 78y are soldered to the terminal 6. Dowels 714pa, 7 of the sensor seats 714p, 714y
14ya (714ya is not shown) is inserted into the mounting holes 710pc and 710yc of the lens barrel 710, and the flexible stay 717 is inserted.
The flexible 716 is screwed to the lens barrel 710. The ears 716pa and 716ya of the flexible 716 are the lens barrel 710, respectively.
Through the holes 710pd and 710yd of the yoke 712p ₁ ,
It is screwed onto 712y ₁ . Coil terminal lid 77p,
The coil terminal and the projector terminal on 77y are flexible 716.
The ear portions 716pa and 716ya, the land portion 716b, and the polyurethane copper wire (three twisted wires) are connected to each other.

An electromagnetic plunger 719 is screwed to the chassis 718 of the locking means 63, one end of the plunger 719 is fitted into a lock arm 721 charged with a spring 720, and the arm 721 is fitted by a shaft screw 722.
Is rotatably screwed to the chassis 718.

The chassis 718 of the locking means 63 is a lens barrel 71.
The terminal of the electromagnetic plunger 719 is soldered to the land 716b of the flexible member 716.

The spherical adjustment screw 723 (three places) (FIG. 9) has the yoke 712p and the chassis 718 of the locking means 63.
The sliding surface of the support frame 72 (hatched portion 72c in FIG. 10) is sandwiched by the adjusting screw 723 and the support ball 711. The adjusting screw 723 is screwed and adjusted so as to face the sliding surface 72 with a slight clearance.

The cover 724 is adhered to the lens barrel 710 to cover the above-mentioned correction optical means.

Correcting optical means drive control circuit 6 shown in FIG.
In 4, the output of the position detection elements 78p and 78y is supplied to the amplifier circuit 7
When amplified by 27p and 727y and input to the coils 79p and 79y, the support frame 72 is driven and the position detection element 78p,
The output of 78y changes. Here coils 79p, 79y
When the driving direction (polarity) of the coil 7 is set to a direction in which the outputs of the position detection elements 78p and 78y become smaller (negative return), the coil 7
Position detection elements 78p, 78 due to the driving force of 9p, 79y
The support frame 72 stabilizes at a position where the output of y becomes substantially zero.

The compensating circuits 728p and 728y are circuits for stabilizing the control system, and the driving circuits 729p and 72p.
9y is a circuit for compensating for the current applied to the coils 79p and 79y.

When command signals 730p and 730y are externally applied to the circuit 64 from a control circuit (not shown), the support frame 72 is driven extremely faithfully to the command signals 730p and 730y.

A method for controlling the coil by negatively returning the position detection output in this way is called a position control method, and the command signal 73 is used.
If the amount of camera shake is given as 0p and 730y, the support frame 72
Is driven in proportion to the amount of camera shake.

FIG. 11 is a detailed view of the correction optical means drive control circuit for driving the correction optical means, and shows only the control system in the pitch direction p (FIG. 9). (Yaw direction y has the same structure).

In FIG. 11, the current-voltage conversion amplifier 7
32pa and 732pb convert photocurrents 731pa and 731pb generated in the element 78p by light incident on the position detecting element 78p from the light projecting element 76p into a voltage, and the differential amplifier 733p converts angular current-voltage converting amplifiers 732pa and 732p.
The difference in output of pb (output proportional to the position of the support frame 72 in the pitch direction p) is obtained. The current-voltage conversion amplifier 7
32pa and 732pb and the differential amplifier 733p correspond to the amplifier circuit 727p of FIG.

The command amplifier 734p adds the command signal 730p to the output of the differential amplifier 733p, and the drive amplifier 73
Enter in 5p. The drive circuit 729p in FIG. 9 includes a drive amplifier 735p, transistors 736pa and 736pb, and a resistor 737p.

Resistors 738p and 739p and capacitor 7
40p is a well-known phase advance circuit, and is a compensating circuit 7 shown in FIG.
It corresponds to 28p.

The adding amplifier 741p is a sum of outputs of the current-voltage converting amplifiers 732pa and 732pb (position detecting element 78).
The sum of the amount of light received by p) is calculated and input to the light emitting element drive amplifier 742p.

Since the projection amount of the light projecting element 76p changes extremely unstablely with respect to temperature and the like, the differential amplifier 7 accordingly.
Although the position detection sensitivity of 33p changes, the light projecting element is driven by the total light receiving amount of the position detecting element 78p as described above (when the total light receiving amount decreases, the light receiving amount constant control that increases the light emitting amount of the light projecting element 76p). This reduces the change in position detection sensitivity.

FIG. 12 is a block diagram of an image stabilization camera control device including an image stabilization control circuit 65 including the correction optical means drive control circuit 64 of FIG. 9 and a shooting control circuit for controlling each part of the camera.

In FIG. 12, 11 is a vibration detecting means including the aforementioned angular displacement detecting means 83p and 83y consisting of a vibration gyro and an arithmetic circuit for processing the output signal of the detecting means, and 12 is a sample hold circuit 12a. Differential circuit 1
The sample-hold circuit 12a is an optical adjusting unit composed of 2b, and the sample-hold circuit 12a is always sampling.
b computes the difference of two identical outputs, the output of which is zero. Here, the SW1 signal generated from the release means 17 (ON when the release button provided on the camera body is pressed halfway
The exposure preparatory means 4 drives the lens for photometry, distance measurement, and focusing.
4 and then O according to the release button press
The exposure means 116 performs mirror up, shutter open / close, mirror down, etc. by the SW2 signal generated from the switch SW2 which becomes N. Further, when the SW1 signal generated from the release means 17 is input to the sample and hold circuit 12a to put the sample and hold circuit in the hold state, the differential circuit 12b sets the time to zero and outputs a continuous shake detection output (hereinafter, target value). Start output.

The drive means 15 is the circuit described with reference to FIGS. 9 and 11, and receives the position detection outputs (outputs of the position detection elements 78p, 78y) of the correction optical means 16 and the coils 79p,
Drive power is applied to 79y. The target value is input to the drive means as a command signal, and the correction optical means is drive-controlled faithfully to the target value.

The image stabilization sensitivity changing means 46 is the image stabilization switching means 1.
The amplification factor of the output of 2 is changed (first ratio). This amplification factor is changed by receiving the outputs of the zoom information output means 111 and the focus information output means 110.

In order to perform sufficient image stabilization, it is necessary to change the driving amount of the correction optical means according to the focal length of the lens. That is, it is necessary to change the correction amount of the correction optical means with respect to the amount of camera shake according to the focal length.

This is because the eccentricity sensitivity (correction amount on the image plane with respect to the drive amount of the correction optical device) of the correction optical device is changed depending on the focal length. For example, in the case of the zoom telephoto, sufficient image stabilization is performed. If the ratio of the drive amount of the correction optical means to the amount of camera shake is 1, this ratio is 1 / when zoom wide.
If you don't put it in 4th place, you won't be able to provide sufficient vibration isolation. If this ratio is left at 1, the image stabilization correction amount becomes too large when the zoom is wide, and conversely, vibration is applied.

The ratio changing means 47 is the image stabilization sensitivity changing means 4.
The amplifier 47a (second ratio) and the amplifier 47a for further changing the amplification of the target value from 6 (reducing the amplification rate to the 2 / 3rd place)
Circuit 47b that obtains the difference between the output of the control signal and the target value of the image stabilization sensitivity changing means 46, a sample hold circuit 47c that holds the output of the differential circuit 47b when the SW2 signal is input, the output of the sample hold circuit 47c and the image stabilization. The differential circuit 47d for obtaining the difference between the target values of the sensitivity changing means 46 and the switch means for connecting the terminal 47g to the switch 47e only when the SW2 signal is input (usually connected to the terminal 47f and inputting the signal of the ratio change inhibiting means 114). (Always connected to terminal 47g)
The target value of the second ratio is given to the driving means 15 until the SW2 signal is input, and the target value is switched to the first ratio while the SW2 signal is being input.

The differential circuits 47b and 47d and the sample hold circuit 47c hold the output of the sample hold circuit 47c when the SW2 signal is input, and calculate the difference between the output of the amplifier 47a and the target value (the output of the image stabilization sensitivity changing means 46). By storing the difference and obtaining the difference between the difference and the target value by the amplifier 47d and setting it as a new target value, the continuity before and after the switching by the switch 47e when the SW2 signal is input is maintained. The amplification factor of the amplifier 47a is further calculated by the zoom information output means 111,
It is variable according to the output of the focus information output means 110. For example, the first ratio output is amplified to ⅔ during zoom tele, and is amplified to ⅓ during zoom wide.

Until the SW2 signal is input (until shooting), the target value is reduced to ⅔ of the true target value (first ratio) to reduce the driving amount of the correction optical means and save power. , It also supports fine framing by reducing the vibration isolation accuracy (no vibration isolation when fine framing is changed). Then, sufficient image stabilization is performed only during exposure (when the SW2 signal is input) to prevent image deterioration due to blurring on the film surface.

In zoom tele, if the second ratio is set to 1/3 of the first ratio until the SW2 signal is input, the photographer cannot feel the image stabilization performance. However, when zoom wide, you can't feel the slight camera shake, so when you are looking through the viewfinder (from SW1 signal to SW
(Up to 2 signals) only needs to be shaken
In such a case, the second ratio may be reduced to 1/3 of the first ratio.

According to the above configuration, more power saving can be achieved.

The ratio change inhibiting means 114 inhibits the first ratio image stabilization from being changed to the second ratio image stabilization by the operation of the photographer. That is, even when the SW1 signal is generated, sufficient vibration isolation is performed at the first ratio, and it is used when the subject is sufficiently observed.

The output of the ratio change inhibiting means 114 is input to the switch 47e of the ratio changing means 47, and the switch 47e is fixed to the terminal 47g. The output of the ratio change prohibiting means 114 is input to the ratio change prohibiting means 112 and indicates that the ratio change is prohibited. The timer 2 (113) outputs the SW2 signal for a certain period from the time when the SW2 signal is input from the release means 17, and resets the ratio change prohibiting means 114 at the trailing edge of the signal. Therefore, the prohibition of changing the ratio is lifted for each shooting. Of course, the ratio change prohibition can also be canceled by the photographer's operation.

[0049]

As described above, in the image stabilization of the conventional still camera, the SW1 signal generated by half-pressing the release button for exposure preparation and the SW2 signal generated by pressing the release button for exposure are pressed. It is controlled by a signal. Therefore, in a camera system in which the lens barrel having a vibration isolation device can be attached to and detached from the camera body, it is necessary to communicate SW1 and SW2 signals between the lens barrel and the camera body.

However, the lens barrel having the image stabilizing device is not limited to the camera body for exclusive use (having the function of supporting the image stabilizing device), but also for the other camera body (having the function of communicating with the image stabilizing control circuit of the lens barrel). It is desirable as a service for users who own cameras of older models to allow them to be used for camera bodies with different mount diameters by using a camera body with a different mount diameter, etc. SW1 signal and SW2 from the adapter and camera body that do not have the function of the shaker
This is not possible because the signaling communication cannot be retrieved.

Therefore, it is conceivable to provide a switch corresponding to SW1 on the lens barrel side so as to perform image stabilization while the photographer is pressing the switch regardless of the operation of the camera. Similarly, if a switch corresponding to SW2 is provided on the lens barrel side, the photographer must operate not only the camera immediately before exposure but also that switch, which makes the operation cumbersome and makes the camera system poor in operability. Not only that, but also because the forgetting of the switch causes deterioration of the vibration isolation accuracy, such a concept is not suitable for practical use.

The object of the present invention is to add an image stabilization control function to a camera body having no image stabilization control function (that is, not having a function of communicating the SW1 signal and the SW2 signal to a lens barrel having an image stabilization device). It is to provide a camera control device capable.

[0053]

Means for Solving the Problems SW1 signal and SW
In order to attach a lens barrel with a vibration isolation device to a camera body of a type that cannot send two signals to the vibration isolation device control circuit so that the camera body also has a vibration isolation function, the SW1 signal Also, it is necessary to provide the lens barrel or the image stabilizing device with a signal generating means for generating a signal that replaces the SW2 signal, but the signal generating means has a function that does not complicate the camera operation at the time of photographing. It is desirable to have it.

In the present invention, based on the above concept, SW
By using a vibration sensor provided in the anti-vibration device as a generation source of a signal corresponding to the 1 signal and the SW2 signal, the vibration of each mechanism in the camera body and the lens barrel caused by the shooting preparation operation and the shooting operation The SW1 signal and the SW2 are detected by determining the operation and the operation timing of each part of the camera from the detected signal.
Since the means for generating the alternative signal of the signal is provided in the control circuit of the image stabilizing device or the control circuit of the lens barrel, the image stabilizing device can be applied to the camera body of the type where the image stabilizing device cannot be originally installed. You can now wear and use.

[0055]

Embodiments of the present invention will be described below with reference to FIGS.

<First Embodiment> FIG. 1 shows the configuration of a first embodiment of a camera control apparatus according to the present invention.

In FIG. 1, reference numeral 11 is a vibration detection means including a shake detection sensor for detecting the vibration angular velocity and vibration displacement of the camera and a sensor output calculation circuit for processing the output signal of the sensor, and 12 is a sample hold circuit 12a. The image stabilization switching means including the differential circuit 12b, 18 is an image stabilization on switch operated by the camera user, 15 is drive means for controlling the drive of the correction optical means, and 16 is the position detection of the correction lens and the correction lens. Compensation optical means including drive coil, 19
Is a vibration discriminating means including a band-pass filter, 46 is an anti-vibration sensitivity changing means for changing the amplification factor of the output of the anti-vibration switching means 12, and 47 is a ratio changing means. Anti-vibration ON SW18
Except for the vibration discriminating means 19, the configuration is almost the same as that of the conventional example. The ratio changing means 47 further amplifies and changes the target value from the image stabilization sensitivity changing means 46 (drops the amplification factor to 2/3), the output of the amplifier 47a and the image stabilization sensitivity. A differential circuit 47b for obtaining the difference between the target values of the changing means 46, a sample hold circuit 47c for holding the output of the differential circuit 47b when the timer 4 (115) signal is input,
A differential circuit 47d for obtaining the difference between the output of the sample hold circuit 47c and the target value of the image stabilization sensitivity changing means 46, and the timer 4
(115) Switch the terminal 47g to the switch 47 only when a signal is input.
switch means connected to e (usually connected to the terminal 47f and always connected to the terminal 47g when the signal of the ratio change prohibiting means 114 is input), and the driving means 15 up to the timer 4 (115) signal input. The target value of the second ratio is given, and the target value of the first ratio is switched while the timer 4 (115) signal is being input.

The differential circuits 47b and 47d and the sample and hold circuit 47c are the timer 4 from the timer 2 (113).
(115) When the signal is input, the output of the sample hold circuit 47c is held, the difference between the output of the amplifier 47a and the target value (the output of the image stabilization sensitivity changing means 46) is stored, and the difference between the difference and the target value is amplified. By obtaining the new target value by 47d, the continuity before and after the switching by the switch 47e at the time of inputting the signal of the timer 4 (115) is maintained. Further, the amplification factor of the amplifier 47a is variable according to the outputs of the zoom information output unit 111 and the focus information output unit 110. For example, at the time of zoom tele, the first ratio output is amplified to ⅔ to zoom. When wide, it is amplified to 1/3.

The image stabilization ON SW 18 is a switch corresponding to the switch SW1 of the camera body, and while the switch 18 is being pressed, an output for putting the sample hold circuit 12a of the image stabilization switching means 12 in the hold state is generated.

The ratio change prohibiting means 114 prohibits the first ratio image stabilization to be changed to the second ratio image stabilization by the operation of the photographer. That is, it is used when the subject is sufficiently observed by performing sufficient image stabilization at the first ratio before the switch SW2 is turned on.

The output of the ratio change inhibiting means 114 is input to the switch 47e of the ratio changing means 47, and the switch 47e is fixed to the terminal 47g. Further, the output of the ratio change prohibition means 114 is inputted to the ratio change prohibition display means 112 and displays that the ratio change is prohibited. The timer 2 (113) outputs for a fixed period in synchronization with the SW2 of the camera body being turned on, and the ratio change prohibiting means 114 is reset at the fall of the output. Therefore, the prohibition of changing the ratio is lifted for each shooting. Of course, the ratio change prohibition can also be canceled by the photographer's operation.

All the functions shown in FIG. 1 are contained in the control unit for the camera body and the detachable lens barrel. In this embodiment, signals from the camera body (SW1 and SW2 from the release means 17 in FIG. 12) are used. Signal) is not sent to the control device. Therefore, the exposure preparation means 44 and the exposure means 116 shown in FIG. 12 are omitted in the configuration of FIG.

In the configuration of FIG. 1, the vibration detecting means 11
The shake angular velocity output is input to the vibration determination means 19.
The vibration discriminating means 19 is composed of a known bandpass filter and a comparison circuit, and detects that the camera is just before exposure.
That is, the vibration discriminating means 19 constitutes a camera operation discriminating means.

Therefore, immediately before the exposure, when the mirror in the camera body jumps up and the vibration is detected by the shake detection sensor,
The vibration discriminating means 19 discriminates from the output signal of the sensor that the camera is in a state immediately before exposure.

FIG. 2 is an output obtained by observing the output of the angular velocity meter of the vibration detecting means through the bandpass filter 21. Normally, the output does not change as shown in the right figure, but the camera user presses the release switch ( When SW2 is turned on), the mirror is raised, and when the mirror collides at the top dead center, the vibration is detected and output by the angular velocity meter (left figure). Where SEN
SOR is the output of the angular velocity meter, MIRROR is the movement of the mirror, and the X contact is the X contact output of the camera. The vibration discriminating means 19 compares the output of the angular velocity meter with the threshold value V ₁ and discriminates that the mirror is raised (SW2 discrimination 22).

The vibration discriminating means 19 discriminating immediately before the exposure as described above outputs the signal to the timer 4, and the timer 4
Is output for a certain period (t ₄ , for example, 0.5 seconds) from the time when the signal is input from the vibration determination means 19. Then, the output holds the sample hold circuit 47c in the ratio changing means 47 and connects the switch 47e to the terminal 47g in the same manner as the SW2 signal of the release means 17 in FIG.
Anti-vibration is performed at the first ratio.

In the structure shown in FIG. 1, when the camera user turns on a main switch (not shown), the constituent elements of each block start to operate, and the image stabilization ON SW 18 provided in the lens.
While the camera user is pressing, image stabilization is performed at the second ratio. Therefore, after the camera user fully presses the release button (for exposure), highly accurate image stabilization is performed at the first ratio only during the t ₄ period, and image blurring on the film surface is almost completely prevented. It will be.

In the conventional configuration shown in FIG. 12, the release signals SW1 and SW2 sent from the camera body are used to change the image stabilization ratio. However, according to the configuration of the present embodiment, the release signal is used. Since the lens barrel with the anti-vibration device can be attached to various camera bodies, it becomes unnecessary.

<Second Embodiment> FIG. 3 shows a second embodiment of the present invention. The present embodiment differs from the first embodiment in that the image stabilization ratio is changed by discriminating both immediately before and after the exposure. As described with reference to FIG. 2, the angular velocimeter detects and outputs the vibration of the mirror up and the vibration when the mirror is down, and the outputs are paired. Therefore, by treating the first output of the gyro as mirror up and the second output as mirror down, it is possible to detect the end of exposure immediately before exposure.

In the configuration of this embodiment, the output of the vibration discriminating means 19 is input to the counter 31, as shown in FIG.
The counter 31 sequentially outputs v ₁ ,
The output of v ₂ is generated, and at the time of output of v ₁ , the sample hold circuit 47c is placed in the hold state and the switch 47
e is connected to the terminal 47g for vibration isolation at the first ratio, and when v ₂ output and no output are made, the sample hold circuit 47c is returned to the sampling state and the switch 47e is connected to the terminal 47g.
It is connected to f to provide vibration isolation at the second ratio. Also, timer 5
In (32), counting is started after the output of the vibration discriminating means 19 is input, and the counter 31 is reset after a fixed period t ₅ (for example, 1 second). This is because the counter 31 is reset after shooting (including continuous shooting) to prepare for the next shooting.

[0071] According to the above configuration, it is possible to perform image stabilization in a second ratio imaging end early after antivibration a t ₄ period from shooting end as in the example of FIG. 1 in a first ratio Since it does not continue, the photographer feels good and saves power.

<Third Embodiment> A configuration having another means for detecting the end of exposure immediately before exposure is shown in FIG. 4 as a third embodiment. The configuration of the present embodiment is different from the first and second embodiments in that two threshold values are used to discriminate immediately before and immediately after exposure.

Referring to the left diagram of FIG. 5, it can be seen that the output when the mirror is down is larger than the output of the angular velocity meter when the mirror is up. Therefore, by comparing the two threshold values V ₁ and V ₂ with the output of the angular velocity meter, it can be surely discriminated whether the exposure is just before the exposure or the exposure is completed. The vibration discriminating means 19 of this embodiment outputs v ₁ when the threshold value is V ₁ and v ₂ when the threshold value is V ₂ , and outputs the first ratio and the second ratio as in the example of FIG. Switch over.

In the vibration discriminating means 19, as shown in FIG.
A second bandpass filter 42 and a film feeding determination means 43 are provided. This is because a large amount of electric power is required for a long time at the time of feeding the film (mainly at the time of rewinding), and during this period, the vibration isolation is forcibly stopped to save electric power.

Due to the vibration during the film feeding, the output of the angular velocity meter through the bandpass filter 42 produces the output as shown in the left diagram of FIG. 6, so this output is compared with the threshold value V ₃ to feed the film. It is possible to determine whether it is medium or not. When the threshold value V ₃ is exceeded, the vibration discriminating means 19 is operated for a certain period.
Produces the output of v ₃ .

When the film feeding is started and the v ₃ signal is output, this output resets the image stabilization ON SW 18 (that is, stops the image stabilization) and the locking means (corresponding to the locking device 63 shown in FIG. 9). ) 41 is activated to lock the correction optical means 16. That is, in any state, when the film feeding starts, the image stabilization is stopped and the correction optical means is locked.

The correction optical means is locked here in order to prevent the correction optical means from malfunctioning due to insufficient power supply to the correction optical means because electric power is used for film feeding. Further, when the power supply to the correction optical means is cut off, the correction lens, which has been stable at the neutral position until now, is prevented from falling due to gravity.

The resetting of the image stabilization ON SW 18 and the locking of the correction optical means by the locking means 41 are performed by the vibration discriminating means 1.
This is performed at the time of outputting v _{2 of} 9, that is, at the end of exposure.

That is, the photographer turns on the image stabilization S for each photographing.
It is necessary to insert W18 and restart the anti-vibration, but it is possible to prevent wasteful power consumption by continuing the anti-vibration.

The v ₁ output of the vibration discriminating means 19, that is, the detection signal immediately before exposure not only performs the image stabilization at the first ratio as in the example of FIGS. 1 and 3, but also serves as described below. .

The v ₁ output of the vibration discriminating means 19 causes the sample and hold circuit 12a of the image stabilization switching means 12 to hold again. Therefore, immediately before the exposure, the target value of the image stabilization switching means 12 is returned to zero and the output is started again. This is because the correction optical means is returned to the center and the image stabilization is started again. The position of the correction optical means may move away from the center while continuing the image stabilizing operation. This is because it is necessary to drive the correction optical means with an amplitude in order to correct a large blur, and thus when the image is taken at a great distance from the center, the optical aberration deteriorates even though the vibration isolation accuracy is high. There is a possibility of doing. Therefore, it is necessary to return the correction optical means to the center immediately before the exposure.

<Embodiment 4> FIG. 7 shows a fourth embodiment of the present invention. This embodiment is different from the above-mentioned embodiment in that the vibration of the mirror down, the mirror up, the vibration of the film feeding is not the shake detection sensor which is the vibration detection means, but the vibration detection means.
This is the impact detection sensor 53 that is configured by a separately provided semiconductor acceleration sensor or the like.

The impact detection sensor is extremely small,
Therefore, the mounting position on the lens barrel can be arbitrarily selected. Therefore, it is possible to detect extremely stably by mounting the lens on the lens barrel where the vibrations of the mirror down, the mirror shock, and the film feeding are most felt.

Further, in the present embodiment, the signal of the prohibiting means 51 is inputted to the vibration discriminating means 19. This prohibition means 51
Emits a signal when operated by the camera user, and by operating the prohibiting means 51, it is possible to prevent the image stabilization characteristic from being changed by the mirror up / down or the film feeding vibration. When the prohibition means 51 is operated, the prohibition display means 52 displays that the output of the vibration discrimination means 19 is stopped.

Further, the ratio changing operation means 54 is the prohibition means 51.
Is operated to manually change the ratio, and the photographer can switch between the first ratio and the second ratio. Therefore, in the configuration of this embodiment, the image stabilization characteristic can be set regardless of the operating state of the camera.

The camera control device of the present invention described in each of the above embodiments may be mounted on any of the lens barrel, the adapter, the accessory and the camera body. By attaching the lens barrel or adapter equipped with the camera control device of the present invention to the camera body, even if the camera body originally does not have a vibration control device control function, the lens barrel or the By installing the adapter, the vibration control device control function is added, and the installation of the vibration control device becomes effective.

Further, since the camera body equipped with the camera control device of the present invention is a camera body having a vibration control device control function as it is, a camera with a vibration control device is obtained by mounting the vibration control device.

The vibration isolator does not have to be formed integrally with the lens barrel, but may be composed of the vibration isolator alone and may be an adapter. Further, the camera control device of the present invention may be mounted on the single unit of the image stabilization device.

[0089]

As described above, the camera control device of the present invention controls the image stabilization device control circuit without taking in the ON signals of the two switches interlocking with the operation of the release button of the camera body. Since the lens barrel or adapter equipped with the camera control device of the present invention is mounted on a camera body that does not have a function for supporting the image stabilization device, the camera body is provided with the function for supporting the image stabilization device. It is possible to provide an anti-vibration camera using a camera body that originally has no anti-vibration device compatible function. Therefore, a camera user who owns an old-fashioned camera system that does not have a vibration-proof device support function also purchases an adapter or a lens barrel (interchangeable lens) equipped with the camera control device of the present invention and mounts it on the old-fashioned camera body. As a result, a camera with a vibration isolation device can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram of a camera control device according to a first embodiment of the present invention.

FIG. 2 is a detailed view and a function of a part of the configuration shown in FIG.

FIG. 3 is a block diagram of a camera control device according to a second embodiment of the present invention.

FIG. 4 is a block diagram of a camera control device according to a third embodiment of the present invention.

FIG. 5 is a diagram showing details and functions of a part of the configuration shown in FIG.

FIG. 6 is a diagram showing details and functions of a part of the configuration shown in FIG. 4;

FIG. 7 is a block diagram of a camera controller according to a fourth embodiment of the present invention.

FIG. 8 is a diagram for explaining an outline of a camera anti-vibration device of a prior art proposed by the present applicant.

9 is a diagram schematically showing a correction optical system and a drive control means of the correction optical system of a prior art camera image stabilizing device configured based on the configuration of FIG.

10 is an exploded perspective view showing details of the mechanical structure of the correction optical system shown in FIG.

11 is a diagram showing a specific circuit example of the correction optical system drive control means shown in FIG.

FIG. 12 is a block diagram showing a control device of a conventional image stabilization camera including the electrical configuration shown in FIGS. 9 and 11.

[Explanation of symbols]

11 ... Vibration detecting means 12 ... Anti-vibration switching means 12a ... Sample-hold circuit 12b ... Differential circuit 15 ... Driving means 16 ... Correction optical means 17 ... Release means 18 ... Anti-vibration ON switch 19 ... Vibration discriminating means 21 ... Band pass filter 22 ... SW2 discriminating means 31 ... Counter 32 ... Timer 41 ... Locking means 42 ... Band pass filter 43 ... Feed discriminating means 44 ... Exposure preparing means 46 ... Anti-vibration sensitivity changing means 47 ... Ratio changing means 51 ... Prohibiting means 53 ... impact detecting means 54 ... ratio changing operation means 61, 62 ... magnetic pole unit 63 ... locking device (locking means) 71, 80 ... correction lens 72 ... correction lens support frame 76p, 76y ... light projecting element 78p, 78y ...
Position detection element 81 ... Correction lens holding frame 82 ... Outer cylinder 83p, 83y ... Angular displacement detection means 84 ... Inner cylinder 85 ... Correction optical means 86p, 86y, 79p, 79y ... Coil 87p, 87y ... Position detection means 110 ... Focus information Output means 111 ... Zoom information output means 112 ... Ratio change prohibition display means 113 ... Timer 114 ... Ratio change prohibition means 115 ... Locking means

Claims (17)

[Claims] 1. A camera control device for a camera having vibration detection means or capable of detachably mounting the vibration detection means, wherein the camera control device is based on an output signal of the vibration detection means. It has a camera operation determination means for determining the operation of each part of the camera, and a command means for generating a control signal for each part of the camera according to the determination result of the camera operation determination means. Camera control device. 2. A camera body having a first control means, a lens barrel having a second control means, the lens barrel having a vibration detecting means, or the vibration detecting means being attached or detached. A camera control device for a camera, which has a TTL viewfinder optical system and a mirror inside the camera body, the camera control device comprising: Camera operation determination means for determining the operation of each part of the camera based on the output signal, and command means for sending a control signal to the first and second control means in accordance with the determination result of the camera operation determination means, A camera control device comprising: 3. The camera operation determination means determines from the output of the vibration detection means when the mirror is raised that the camera is in a state immediately before the exposure operation, and the command means raises the mirror. 3. The camera control device according to claim 2, wherein a control signal indicating the fact is sent to the first and second control means. 4. The camera operation determination means has a function of determining that the camera is in an exposure end state based on an output signal of the vibration detection means when the mirror descends. The camera control device according to claim 2, wherein 5. The camera operation determining means determines an odd number of vibrations when the mirror is raised and an even number of times when the vibrations when the mirror is raised and when the mirrors are lowered are generated a plurality of times within a predetermined period. 3. The camera control device according to claim 2, wherein the camera control device has a function of determining vibration when the mirror descends. 6. The camera operation judging means has a function of judging that a film is being fed in the camera based on an output signal of the vibration detecting means. The camera control device according to item 1 or 2. 7. An anti-vibration device having vibration detection means and correction optical means for correcting image blurring on an image plane is detachably or fixedly installed, and the TT is provided.
A camera control device for a camera having an L finder optical system and a raising and lowering mirror, which is based on a vibration detection result of the camera mirror up, mirror down, and film feeding by the vibration detection means. A camera control device having an image stabilization control means for controlling correction optical means and the like. 8. The camera control device according to claim 7, wherein when the vibration of the mirror-up is detected, the image stabilization characteristic is changed within a first predetermined time. 9. The anti-vibration is stopped within a predetermined time when the vibration of the mirror down is detected.
Camera controller. 10. The camera control device according to claim 7, wherein when the vibration of the film feeding is detected, the image stabilization is stopped within a predetermined time. 11. The camera control device according to claim 7, wherein the locking means locks the correction optical means when the image stabilization is stopped. 12. The anti-vibration is stopped within a predetermined time and the correction optical means is locked when at least one of the vibration of the mirror down and the vibration of the film feeding is detected. Camera controller. 13. The camera control device according to claim 7, wherein when the vibration of the mirror up is detected, the image stabilization is stopped within a predetermined time. 14. The anti-vibration device has a shock detecting means different from the vibration detecting means, and the shock detecting means detects vibrations of mirror up, mirror down, and film feeding. The camera control device according to claim 7, which is provided. 15. The camera control device according to claim 2, wherein the vibration detecting means is provided in a device that is detachable from the camera body. 16. The camera control device according to claim 2, wherein the camera control device is provided on the lens barrel. 17. The method according to claim 1, further comprising a function for prohibiting camera control by vibration detection.
Camera controller.