JP2001343677A - Camera incorporating filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera capable of securing quick photographing performance in the midst of operating a filter without using a high speed filter driving device. SOLUTION: The control of a filter control means for moving a polarizing filter to the inside and the outside of a photographing optical path, focusing control by a focusing control means and exposure control by an exposure control means are controlled to be overlapped time-sequentially.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a built-in photographic lens filter.

[0002]

2. Description of the Related Art Conventionally, in a TTL single-lens reflex camera, since light passing through a photographing lens is guided to a finder, when a polarizing filter or the like is used, a polarizing filter or the like is provided at the tip of a lens barrel of the photographing lens and is used. The photographer manually rotates the polarizing filter around the axis parallel to the optical axis of the photographing lens while looking through the viewfinder of the camera (part of the polarizing filter, etc.). This filter has a structure in which the filter part can be rotated with respect to the mounting part), and the finder screen is visually checked so that a desired filter effect can be obtained, and the rotational position of the polarizing filter or the like is adjusted and photographed. In order to eliminate the inconvenience of attaching and detaching the filter, Japanese Patent Application Laid-Open No. 8-334809 discloses that a built-in filter is electrically moved in and out of the optical path of the taking lens.

In Japanese Patent Application Laid-Open No. 5-34116, two polarizing filters are arranged in a lens barrel such as an interchangeable lens for a video camera, and one of the filters is rotated by an actuator to adjust the light amount of the interchangeable lens, especially the mirror lens. It is disclosed to be performed continuously.

Further, in the lens shutter camera, the optical axis of the photographing lens and the optical axis of the finder are different, so that light passing through the photographing lens cannot be observed, and the effect of a polarizing filter or the like attached to the leading end of the photographing lens cannot be confirmed through the finder. For this reason, the photographer adjusts the rotational position by eye using an index provided on a rotating frame such as a polarizing filter, and performs photographing.

Therefore, in Japanese Utility Model Laid-Open Publication No. Hei 3-60323, in a lens shutter camera, a polarizing filter is provided on the front surface of both a photographing lens and a finder so as to be synchronously rotatable, and a photographer manually rotates the polarizing filter on the photographing lens side. If so, the polarizing filter on the finder side also rotates in synchronization, so that the effect of the polarizing filter during photographing can be confirmed through the finder.

Further, recently, there has been proposed a camera which automatically adjusts the effect of the filter by moving the filter into and out of the photographing optical path and the effect of the filter.

[0007] This will be described below.

FIG. 30 is a structural view of a principal part of the lens shutter camera as viewed from above, FIG. 31 is a perspective view of the external appearance of the lens shutter camera, and FIG. 32 is a perspective view of the principal part, in which the filter has entered the optical path of the taking lens. Represents FIG. 33 is a perspective view of a main part, showing a state where the filter is retracted outside the optical path of the taking lens. FIG. 34 is a block diagram showing components. Figures 35, 36
Is an operation flowchart.

In these figures, reference numeral 41 denotes a camera body, and all the main parts shown in FIGS. 32 and 33 are provided in the camera body 41. Reference numeral 42 denotes a photographing lens capable of close-up (macro) photographing, 43 denotes a polarizing filter, 44 denotes a filter holding frame which holds and fixes the polarizing filter 43, and has an axis parallel to the optical axis of the photographing lens at the outer front side (subject side). A gear 44a (hereinafter, referred to as a filter gear) that is rotatably supported by the filter support member 45 and receives rotational power on the rear side (film surface side) of the outer periphery is provided.

Reference numeral 45a denotes an advancing / retreating guide portion of the filter supporting member 45, which is provided with an elongated hole 45b which fits with two flanged guide pins 46 implanted in a camera body (not shown). It is slidably held by the camera body (not shown) with the guide pin flange 46a and the camera body (not shown) slidable by the guide pin and the long hole 45b.

Reference numeral 45c denotes a rack gear provided at the upper end of the advance / retreat guide portion 45a of the filter support member 45, 45d denotes a spring hook provided at the lower end of the advance / retreat guide portion 45a of the filter support member 45, and 47a denotes a camera body (not shown). A spring hook 47b provided is a stopper provided on the camera body (not shown). As shown in FIG. 32, the rotation center of the polarizing filter is in contact with the right end 45e of the advance / retreat guide 45a of the filter support member 45. And the optical axis of the photographing lens substantially coincide with each other.

Reference numeral 48 denotes a tension coil spring which is hung between both spring hooks 45d and 47a, and generates tension so that the right end 45e of the filter support member 45 and the stopper 47b come into contact with each other in the state shown in FIG. Reference numeral 49 denotes a filter driving electromagnetic motor (fixed to a camera body (not shown); hereinafter, referred to as a filter driving motor); 410, a motor worm gear;
The first two-stage gear 412 composed of the bevel gear 411a and the small gear 411b meshing with the first gear 412 is a second two-stage gear, and the large gear 412
a meshes with the small gear 411b, and the small gear 412b becomes the sun gear and meshes with the planetary gear 413.

A planet arm 414 holds the planet gear 413 so as to revolve around the sun gear 412b. 415
Denotes an idler gear, which includes a planetary gear 413 and a filter gear 44.
Connect between a. The gears 411, 412, 415 are rotatably supported by a camera body (not shown). The forward / reverse rotation of the filter driving motor 9 causes the planetary gear 413 to rotate.
Revolves clockwise or counterclockwise around sun gear 412b, and idler gear 415 or rack gear 45
The rotation of the polarizing filter 43 and the forward and backward movements into and out of the optical path of the photographing lens are performed. These 45c, 48, 49,
410, 411, 412, 413, and 414 constitute filter advancing / retreating means.

A phase plate 416 is fixed to the rear end of the filter holding frame 44 (after the filter gear 44a) concentrically with the rotation axis of the polarization filter and has a donut shape that does not block the polarization filter section. The phase plate 416 is made of a thin film such as a lith film, and has a continuous pattern of a light transmitting portion and a light shielding portion. Reference numeral 416a (FIG. 33) denotes an initial position portion where the light transmitting portion is continuous during a rotation angle larger than the other portions, and a filter rotation position detecting means provided directly above the taking lens optical axis with the phase plate 416 interposed therebetween. The pulse generated when the polarization filter is rotated is counted from the initial position by the photo interrupter 417, and the rotation position of the polarization filter is determined.

Reference numeral 418 denotes a photometric lens, and 419, a photometric sensor (SPC) having a well-known backlight detection function capable of detecting the output of the center and outer periphery of the sensor light receiving surface separately and integrated with a photometric IC. I have. Both the photometric lens 418 and the photometric sensor 419 immediately after the polarizing filter 43 (on the film surface side)
And the light passing through the polarizing filter 43 can be measured. In addition, the upper side of the lens 42a having little effect on the photographing screen (a rectangular screen which is long in the horizontal direction and short in the vertical direction) is cut to secure a space for disposing the photometric sensor.
The light metering lens 418 and the light metering sensor 419 are configured so that a light-shielding tube (not shown) does not adversely affect photographing light and light metering.

Reference numeral 420 denotes a filter advance / retreat detection switch, which is OFF when the polarizing filter 43 enters the optical path of the taking lens.
Turns ON when retreating out of the optical path.

Reference numeral 421 denotes a programmable lens shutter which serves both as an aperture and a shutter, and is arranged behind the polarizing filter 43 (on the film surface side) so as not to block the optical path to the photometric sensor.

Reference numeral 422 denotes a filter effect setting means provided on the upper surface of the camera exterior. The filter effect setting means 422 is a rotary knob by which the photographer can selectively set the effect of the polarizing filter 43, and the polarizing filter 43 moves out of the optical path of the photographing lens. Evacuate “OF
When the "F" position or any other position is selected, the polarizing filter 43 enters the optical path of the photographing lens and is set at a "MAX" position where the polarizing filter has a maximum effect and a rotating position where the polarizing filter has a minimum effect. “MIN” position, “1/2” position set to a rotation position that is half of the maximum and minimum of the polarization filter effect, “1 /” position set to a rotation position that is a quarter of the maximum and minimum of the polarization filter effect There is provided a "4/4" position and a "3/4" position which is set at a rotational position that is three quarters of the maximum and minimum of the polarizing filter effect.

423 is an index to be used when selecting each of the above positions, 424 is a finder objective window, 425 is an autofocus light emission window, 426 is an autofocus light reception window, 427 is a strobe light emission window, 428 is a release button, and 429 is a release button. A film take-up spool 430 is a film, and 431 is a film cartridge (patrone). In FIG. 34, reference numeral 432 denotes control means (CPU) for controlling the entire camera, which functions as a calculation means for performing various calculations based on photometric values obtained by photometry by rotating a polarization filter, and a specific filter rotation position and the like. It also has a function as storage means for storing.

Reference numeral 433 denotes a distance measuring sensor such as a known active autofocus position detecting element (PSD) which receives reflected light from a subject of infrared light emitted from a light emitting element (IRED or the like) not shown. Then, the subject distance is calculated from the light receiving position. All of the distance measurement calculation and focus adjustment control are performed by the control unit 432, and the focus adjustment is performed by moving the focus adjustment lens 42b by a lens drive motor (not shown). These form an automatic focusing device.

Reference numeral 434 denotes a motor drive circuit for driving the filter drive motor 49; 435, a strobe circuit for generating a high voltage for emitting a strobe; and 436, a strobe light emitting unit.

Next, the operation of the above configuration will be described with reference to FIGS.
A description will be given along a flowchart (continuation of the flowchart in FIG. 35).

[Step 1 (S1)] When a main switch (not shown) is turned on, power is supplied to the camera, the photographing lens barrel is extended to a predetermined position, and the photographing preparation is in an initial state.

[Step 2 (S2)] The setting state of the filter effect setting means 422 is monitored. If the setting state is OFF, the polarization filter 43 is set to be retracted out of the optical path of the photographing lens, and the process proceeds to step 3. If it is not OFF, it is determined that the polarization filter 43 has been set to a predetermined state (any of MAX, 3/4, 1/2, 1/4, and MIN positions) in which it has entered the optical path of the photographing lens. move on.

[Step 3 (S3)] The state of the filter advance / retreat detection switch 420 is monitored, and the polarization filter 43
It is checked whether or not is surely retracted out of the optical path of the photographing lens (whether in the state of FIG. 33). If the switch 420 is ON, it is confirmed that the polarization filter 43 is retracted, and the process proceeds to step 7. If the switch 420 is OFF, the polarization filter 43
Is determined to have entered the photographic lens optical path (the state shown in FIG. 32), and the process proceeds to step 4.

[Step 4 (S4)] A command is sent from the control means 432 to the motor drive circuit 434 to reverse the filter drive motor 49, and the filter drive motor 49 rotates reversely. In the state of FIG. 32, the power of the motor 49 is rotated from the motor worm gear 410 to the first second gear 411 in the clockwise direction and the second second gear 412 in the counterclockwise direction to rotate the planetary gear 413 around the sun gear 412b. Revolve clockwise.

Therefore, the planetary gear 413, which has meshed with the idler gear 415, meshes with the rack gear 45c, resists the tension of the tension coil spring 48, and engages with the elongated hole 45b provided in the advance / retreat guide portion 45a with the guide pin. The filter supporting member 45 guided by 46 is rotated until the polarizing filter 43 moves to a position (state in FIG. 33) where the polarizing filter 43 is completely retracted out of the optical path of the taking lens.

[Step 5 (S5)] The state of the filter advance / retreat detection switch 420 is monitored again, and it is checked whether the polarizing filter 43 has reliably retracted out of the optical path of the taking lens (the state shown in FIG. 33). If the switch 420 is ON, the retreat of the polarizing filter 43 is confirmed, and the process proceeds to step S6. If the switch 420 is OFF, it is determined that the polarizing filter 43 has not yet retreated outside the optical path of the taking lens, and Step 4 is repeated.

[Step 6 (S6)] A command to stop the filter drive motor 49 is sent from the control means 432 to the motor drive circuit 434, and the filter drive motor 49 stops. Here, tension is applied to the filter support member 45 by the tension coil spring 48 so that the filter support member 45 always enters the photographing lens optical path.
3, the second speed gear 412, the first speed gear 411, and the motor worm gear 410 mesh with each other in the speed increasing direction so that the final speed increasing gear is a worm gear. , Are held in the state of FIG.

In consideration of the possibility that a large shock may be applied to the camera and the gears may be disengaged, the advance / retreat guide 45a of the filter support member 45 is locked and held in the state shown in FIG. It is also possible to provide a locking mechanism (not shown) that releases the locking by the forward rotation of the motor 49. Next, proceed to step 7.

[Step 7 (S7)] It is determined whether the release button 428 of the camera has been pressed to the first stroke and the first stroke switch SW-1 has been turned on. If it is ON, go to step 8. 1st stroke switch SW-
If 1 is OFF, the process jumps to step 44.

[Step 8 (S8)] Control means 432
Captures the photometric output from the photometric sensor 419 integrated with the photometric IC, performs AE photometric calculation, and determines an exposure control value.

[Step 9 (S9)] Control means 432
Discloses a known active auto-focus mechanism, in which a light emitting element IRED (not shown) is turned on to project light to a subject, and infrared reflected light from the subject is measured by a distance measuring sensor (PSD).
In step 433, the output based on the position of the received light is fetched, AF distance calculation is performed, and the photographing lens drive amount for focusing is determined.

[Step 10 (S10)] When the strobe auto mode is selected by the strobe mode setting means (not shown), it is determined by the AE photometry operation in step 8 that the subject has low brightness requiring strobe light emission. At this time, if the flash mode forced-flash is selected by the flash mode setting means (not shown), it is determined that the flash fires, and the process proceeds to step 36. If it is determined that the strobe does not emit light, the process proceeds to step S11.

[Step 11 (S11)] It is determined whether or not the release button 428 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned on. ON
If so, proceed to step 12. 2nd stroke switch
If SW-2 is OFF, the process returns to step 2.

[Step 12 (S12)] The photographing lens 42 (focusing lens 42b) is driven based on the photographing lens driving amount based on the AF distance measurement calculation result in step 9 to adjust the focus.

[Step 13 (S13)] Based on the exposure control value determined in step 8, the aperture of the lens shutter 421 and the shutter speed are controlled to perform exposure.

[Step 14 (S14)] After the exposure,
The photographing lens 42 driven for focus adjustment is returned to the initial position.

[Step 15 (S15)] The film is wound up by one frame to prepare for the next photographing. Step 2 after winding up
Return to

[Step 16 (S16)] After it is determined in step 2 that the filter effect setting means 422 is other than OFF, the release button 428 of the camera is pressed to the first stroke and the first stroke switch SW-1 is turned on. Is determined. If it is ON, the process proceeds to step S17. If the first stroke switch SW-1 is OFF, step 44
Fly up to.

[Step 17 (S17)] Control means 43
2 to the motor drive circuit 434 to the filter drive motor 49
Is sent to rotate the filter drive motor 49 forward.
Turns forward. At first, in the state shown in FIG. 33, the power of the motor 49 is rotated from the motor worm gear 410 to the first second gear 411 in the counterclockwise direction, the second second gear 412 to the clockwise direction, and the planetary gear 413 to the sun. Revolve clockwise around gear 412b.

Therefore, the planetary gear 413 meshed with the rack gear 45c is disengaged, and the
The filter support member 45 pulled by the tension coil spring 48 at the same time as meshing with the
The right end 45e of a is moved to a position where it comes into contact with the stopper 47b, the polarizing filter 43 enters a predetermined position in the optical path of the taking lens, and the filter gear 44a meshes with the idler gear 415 to be in the state of FIG. 32
In this case, there is no operation from the state shown in FIG. 33).

After that, the motor 49 continues to rotate forward, and rotates the filter gear 44a counterclockwise.
The polarization filter 43 held by the filter holding frame 44 integral with the lens a is rotated counterclockwise around an axis substantially coincident with the optical axis of the taking lens 42.

[Step 18 (S18)] Control means 43
2 captures the photometric output from the photometric sensor 419 that receives the subject light passing through the polarizing filter 43 while rotating the polarizing filter 43, and performs AE photometric calculation.

[Step 19 (S19)] Step 18
At the same time, the control means 432 controls the light emitting element IRED (not shown) constituting a known active auto focus mechanism.
Is turned on, light is projected on the object, the reflected light from the object is received by the distance measuring sensor (PSD) 433, the output of the position is received, and the change in the photographing optical path length by inserting the polarizing filter 43 in the photographing lens 42 is obtained. Consideration and correction
An F-distance calculation is performed to determine a photographing lens driving amount for focusing.

[Step 20 (S20)] Step 1
At the same time as 8 and 19, the control means 432
The maximum value and the minimum value of the photometric output from the CPU are detected and calculated, and the photometric output is associated with the pulse count from the initial position of the filter rotational position detecting means (photo interrupter) 417, so that the photometric output is the maximum value and the minimum value. Are stored, the rotational position of the polarizing filter 43 at the time of is indicated.

[Step 21 (S21)] If the strobe mode setting means (not shown) selects strobe forced light emission, it is determined that the strobe light will be emitted, and the routine proceeds to step 40. If the strobe does not emit light, the flow advances to step S22.

[Step 22 (S22)] Step 18
AE photometric calculation by the photometric sensor (SPC) 419
When the difference in the photometric output between the center and the outer periphery of the light receiving surface of the sensor becomes larger than a predetermined value, it is determined that the backlight photography is less effective with the effect of the polarizing filter 43, and the process returns to step S4. Perform the evacuation operation to the outside. If not, the process proceeds to step S23.

[Step 23 (S23)] Step 18
In the AE photometric calculation in step (a), if it is determined that the low-luminance subject photography in which the maximum value of the photometric output when the polarizing filter 43 enters is smaller than the predetermined value A, the shutter exposure time becomes longer and the camera shake becomes longer if the photographing is performed as it is. Since there is a possibility that strobe light emission is required, the process returns to step 4 and the retreat operation of the polarizing filter 43 out of the optical path of the photographing lens is performed. If it is not smaller than the predetermined value A, the process proceeds to step 24.

[Step 24 (S24)] Step 18
If the difference between the maximum value and the minimum value of the photometric output when entering the polarizing filter 43 is smaller than the predetermined value B, it is determined that the effect of the polarizing filter is small.
Then, the retracting operation of the polarizing filter 43 out of the optical path of the taking lens is performed. If not smaller than the predetermined value B, step 2
Go to 5.

[Step 25 (S25)] The setting state of the filter effect setting means 422 is monitored, and if it is set to MAX, the flow proceeds to step 26. Otherwise, go to step 27.

[Step 26 (S26)] Step 20
A control signal is transmitted from the control means 432 to the motor drive circuit 434 so that the polarization filter 43 is set at the storage position at which the photometric output at which the effect of the polarization filter at which the effect is greatest has the minimum value is obtained. The pulse of the detection means (photo interrupter) 417 is counted,
When the desired position is obtained, the drive of the filter drive motor 49 is stopped. Thereafter, the process proceeds to step 11.

[Step 27 (S27)] The setting state of the filter effect setting means 422 is monitored, and if it is set to 3/4, the flow proceeds to step 28. Otherwise, go to step 29.

[Step 28 (S28)] Step 20
The filter rotation angle between the storage position at which the photometric output at the minimum value and the storage position at which the photometric output attains the maximum value is divided into four equal parts, and the effect of the polarizing filter that is closer to the minimum value side is two. (The filter effect is MAX-MIN 3
A control signal is transmitted from the control means 432 to the motor drive circuit 434 so as to set the polarization filter 43 at the (/ 4 image) position, the pulses of the filter rotation position detection means (photo interrupter) 47 from the initial position are counted, and the desired position is obtained. Is stopped, the drive of the filter drive motor 9 is stopped. Thereafter, the process proceeds to step 11.

[Step 29 (S29)] The setting state of the filter effect setting means 422 is monitored, and if it is set to 1/2, the flow proceeds to step 30. Otherwise, go to step 31.

[Step 30 (S30)] Step 20
The filter rotation angle between the storage position at which the photometric output at the minimum indicates the minimum value and the storage position at which the photometric output indicates the maximum value is divided into four equal parts, and the effect of the polarizing filter is intermediate (the filter effect is MAX. A control signal is transmitted from the control means 432 to the motor drive circuit 434 so as to set the polarization filter 43 at the position of (イ メ ー ジ image of −MIN), and the filter rotation position detection means (photo interrupter) 41 from the initial position is set.
The pulse of 7 is counted, and when the desired position is obtained, the driving of the filter driving motor 49 is stopped. Thereafter, the process proceeds to step 11.

[Step 31 (S31)] The setting state of the filter effect setting means 422 is monitored, and if it is set to 1/4, the flow proceeds to step 32. Otherwise, go to step 33.

[Step 32 (S32)] Step 20
The filter rotation angle between the storage position at which the photometric output at the minimum value of the photometric output and the storage position at which the photometric output at the maximum value is divided into quarters, and the effect of the polarizing filter closer to the maximum value side is two. (The filter effect is 1 of MAX-MIN)
A control signal is transmitted from the control means 432 to the motor drive circuit 434 to set the polarization filter 43 at the (/ 4 image) position, and the pulses of the filter rotation position detection means (photo interrupter) 417 from the initial position are counted.
When the desired position is obtained, the drive of the filter drive motor 49 is stopped. Thereafter, the process proceeds to step 11.

[Step 33 (S33)] The setting state of the filter effect setting means 422 is monitored, and if it is set to MIN, the flow proceeds to step 34. Otherwise, go to step 35.

[Step 34 (S34)] Step 20
A control signal is transmitted from the control means 432 to the motor drive circuit 434 so that the polarization filter 43 is set at the storage position where the photometric output with the smallest effect of the polarization filter 43 has the maximum value. The pulses of the position detecting means (photo interrupter) 417 are counted, and when the desired position is obtained, the filter driving motor 49 is counted.
Stop driving. Thereafter, the process proceeds to step 11.

[Step 35 (S35)] It is determined that a problem such as poor contact of the filter effect setting means 422 has occurred.
The control signal is transmitted from the control means 432 to the motor drive circuit 434, and the drive of the filter drive motor 49 is stopped at the initial rotation position of the polarization filter 43 based on the pulse of the filter rotation position detection means (photo interrupter) 417. After that, the operation of the camera is prohibited.

[Step 36 (S36)] Step 10
If it is determined that the strobe light is emitted and the calculated distance measurement value obtained in step 9 is larger than a predetermined close distance C that enters the macro shooting area, it is determined that shooting is performed at a normal distance, and step S9 is performed. Proceed to 37. If not, it is regarded as close-up shooting (macro shooting), and step 4
Proceed to 1.

[Step 37 (S37)] It is determined whether the release button 428 of the camera is pressed to the second stroke and the second stroke switch SW-2 is turned on. ON
If so, proceed to step 38. 2nd stroke switch
If SW-2 is OFF, the process returns to step 2.

[Step 38 (S38)] If the flow has passed through the flow of step 9, the flow proceeds to step 9;
The focusing lens is driven by driving the photographing lens 2 (focusing lens 2b) based on the photographing lens driving amount based on the result of the F distance measurement calculation.

[Step 39 (S39)] If the flow has passed through the flow of step 8, the process proceeds to step 8, and if the flow has passed through the flow of step 18, the lens is controlled based on the exposure control value determined in step 18. By controlling the aperture of the shutter 421 and the shutter time, the flash is emitted to perform exposure. Thereafter, the process proceeds to step S14.

[Step 40 (S40)] Step 21
After it is determined that the strobe light is emitted, step 19
If it is determined that the calculated distance measurement value obtained in is larger than the predetermined close distance C that enters the macro shooting area, it is determined that shooting is performed at a normal distance, and the process returns to step 4 to return to the polarization filter 43.
Of the taking lens out of the optical path. Otherwise, it is regarded as close-range shooting (macro shooting), and the process proceeds to step 41.

[Step 41 (S41)] Control means 43
2 to the motor drive circuit 434 to the filter drive motor 49
Is sent to rotate the filter drive motor 49 forward.
Turns forward. In the case of the state shown in FIG. 33 at the beginning after step 36, the power of the motor 49 is changed from the motor worm gear 410 to the first two-stage gear 411 in the counterclockwise direction.
Rotating the two-stage gear 412 clockwise causes the planetary gear 413 to revolve clockwise around the sun gear 412b. Therefore, the planetary gear 413 meshed with the rack gear 45c
Is disengaged and meshes with the idler gear 415, and at the same time, the filter support member 45 pulled by the tension coil spring 48 moves the right end 45e of the advance / retreat guide portion 45a to a position where it abuts the stopper 47b. When the filter gear 44a enters the predetermined position in the optical path of the photographing lens and the filter gear 44a meshes with the idler gear 415, the state shown in FIG. 32 is reached (the state shown in FIG. There is no operation from). After that, the motor 49 continues to rotate forward, and rotates the filter gear 44a counterclockwise.
The polarizing filter 43 held by the filter holding frame 44 integral with the filter 4a is rotated counterclockwise around an axis substantially coincident with the optical axis of the photographing lens.

[Step 42 (S42)] The position of the built-in strobe of the camera is substantially determined, and the light emitted from the strobe is reflected by a nearby subject (a mainly flat subject such as a copy having a particularly smooth surface). And a polarizing filter 4 that can most effectively cut the light into the taking lens.
The control means 432 controls the motor driving circuit 4 so that the polarization filter 43 is set at the pre-stored rotational position of the motor 3.
The control signal is transmitted to 34, the pulse of the filter rotational position detecting means (photo interrupter) 417 from the initial position is counted, and when the desired position is obtained, the driving of the filter driving motor 49 is stopped. Thereafter, the process proceeds to step 37.

[Step 44 (S44)] The state of the main switch (not shown) is monitored. If it is ON, the process returns to step 2 and repeats thereafter. If OFF, step 45
Proceed to.

[Step 45 (S45)] The photographing lens barrel is retracted, and the power supply to the camera is cut off.

By proposing the above-described camera system, it is possible to automatically perform the operation of attaching the filter to the photographing optical system and the operation of adjusting the filter to exert the effect of the filter, which were bothersome. It is becoming.

For this reason, in the conventional camera, the photographer must manually rotate the polarizing filter or the like to a desired position while checking the filter effect of the polarizing filter or the like through a finder and visually confirming each time. The inconvenience of trouble has been solved.

Further, at the time of photographing when a polarizing filter or the like becomes unnecessary (for example, when the brightness of the object is low, the effect of the polarizing filter such as backlight is small, or when the amount of light emitted by the polarizing filter or the like is lost in ordinary flash photographing, etc.) ) The photographer must judge by himself and remove the polarizing filter etc. by hand by screwing it off by hand. Conversely, when photographing that needs the polarizing filter etc. suddenly, the polarized light in the filter case is closed. It is necessary to take out the filter etc. and screw it into the photographic lens by hand each time, which is very troublesome and inferior in quick shooting performance,
The major inconvenience of missing a photo opportunity has also been resolved.

[0074]

In a camera which incorporates a polarizing filter as described above and which can be moved forward and backward by electric drive of the polarizing filter, there is a possibility that a photo opportunity may be missed during the operation of the filter. The quick-shot performance of the camera is impaired. Therefore, it cannot be said that the camera is easy to use for a camera user who wants the quick shooting and the usability of the conventional camera.

As described above, the conventional camera with a built-in polarizing filter has an additional function that lowers its original performance, and it is not an ideal state of improved function. Has become an obstacle.

As means for making the quick shooting performance when the shutter is released during the filter operation equivalent to that of a camera having no built-in filter, the release time lag due to the filter operation is determined by AF.
It is necessary to increase the speed until processing can be performed within other release time lags such as AE and AE, but in order to realize this, it is unavoidable to increase the size and cost of the filter is not.

Accordingly, an object of the present invention is to provide a camera with a built-in polarizing filter to ensure quick shooting during filter operation and to improve the stability of a power supply without using a high-speed filter driving device, thereby providing a highly convenient polarization filter. An object of the present invention is to realize electric drive of a system or mechanism with a built-in filter.

That is, a first object of the present invention is to improve the quick shooting performance of a camera having a built-in filter and electrically driving the filter.

A second object of the present invention is to stabilize the power supply of a camera having a built-in filter for electrically driving the filter.

[0080]

According to a first aspect of the present invention, there is provided:
Filter driving means for moving the filter optical system inside and outside the photographing optical path, filter control means for controlling the filter driving means, focusing control means for controlling the focusing operation, and exposure control means for controlling the exposure operation In the camera with a built-in filter, control of the filter control means;
It is characterized by having a general control means for controlling at least one of the focus control by the focus control means and the exposure control by the exposure control means so as to be able to overlap in time series. With this configuration, the first object is achieved.

According to a second aspect of the present invention, there is provided a filter driving means for moving a filter optical system inside and outside a photographing optical path, a filter control means for controlling the filter driving means, and a focusing control means for controlling a focusing operation. A camera with a built-in filter having exposure control means for controlling an exposure operation, wherein the filter control means is configured to control the filter when at least one of a focusing operation and an exposure operation is required during drive control of the filter optical system. The drive control of the optical system is interrupted, and the control of the focus control means and the exposure control means is started. With this configuration, the second object is achieved.

According to a third structure of the present invention, in the second structure, the filter control means continuously controls the filter optical system after the control of the focusing control means or the exposure control means is completed. It is characterized by the following. With this configuration, the second object is achieved.

According to a fourth aspect of the present invention, there is provided a filter driving means for moving a filter optical system inside and outside a photographing optical path, a filter control means for controlling the filter driving means, and a focusing control means for controlling a focusing operation. A camera with a built-in filter having an exposure control means for controlling an exposure operation, comprising a general control means for inhibiting the operation of the filter optical system during at least one of the focus control and the exposure control. . With this configuration, the second
Achieve the objectives.

According to a fifth configuration of the present invention, in a camera with a filter having a filter optical system in a photographing optical path, a filter effect adjustment drive unit for adjusting the effect of the filter optical system, and a drive control of the filter effect adjustment drive unit. Filter control means for performing focusing control means for controlling a focusing operation;
Exposure control means for performing an exposure operation, control of the filter control means, and general control means for controlling at least one of the control by the focus control means or the control by the exposure control means so as to be able to overlap in time series, It is characterized by having. With this configuration, the first object is achieved.

According to a sixth aspect of the present invention, there is provided a filter built-in camera having a filter optical system in a photographing optical path, a filter effect adjusting driving means for adjusting the effect of the filter, and a filter for driving and controlling the filter effect adjusting driving means. Control means, a focus control means for controlling a focusing operation, and an exposure control means for performing an exposure operation, wherein the filter control means performs at least one of focusing and exposure operations during drive control of the filter optical system. In this case, the drive control of the filter optical system is interrupted, and the control by the focusing control means and the exposure control means is performed. With this configuration, the second object is achieved.

According to a seventh aspect of the present invention, in the sixth aspect, the filter control means controls the filter optical system after the focus control means or the exposure control means completes the control. It is characterized in that it is performed continuously.
With this configuration, the second object is achieved.

In an eighth aspect of the present invention, in a camera with a filter having a filter optical system in a photographing optical path, a filter effect adjustment driving means for adjusting the effect of the filter optical system, and drive control of the filter effect adjustment drive means. Filter control means for controlling the focus operation, exposure control means for controlling the focus operation or exposure control means for performing the exposure operation, and control for inhibiting control of the filter control means during at least one of the focus control and the exposure control. It has a control means. With this configuration, the second object is achieved.

A ninth configuration of the present invention is a filter driving means for moving a filter optical system inside and outside a photographing optical path, a filter effect adjusting driving means for adjusting the effect of the filter optical system, the filter driving means, and the filter driving means. Filter control means for controlling the filter effect adjustment driving means, exposure control means for controlling the exposure operation, and general control means for controlling the control of the filter control means and the exposure control so as to be able to overlap in time series. The overall control means has a function of complementing the exposure operation when the control of the filter control means overlaps with the exposure control in a time-series manner.
With this configuration, the first object is achieved.

A tenth structure of the present invention is characterized in that, in the ninth structure described above, there is provided a means for selecting operation or non-operation of a function complementary to the exposure operation.

An eleventh aspect of the present invention is the ninth or tenth aspect, characterized in that the ninth or tenth aspect has means for selecting a function for complementing the exposure operation.

The twelfth structure of the present invention is different from the ninth and first embodiments described above.
In the zeroth or eleventh configuration, the function of complementing the exposure operation is a flash device.

The thirteenth structure of the present invention is different from the ninth and first embodiments described above.
In the zeroth or eleventh configuration, the function of complementing the exposure operation is an image blur correction device.

The fourteenth structure of the present invention is different from the ninth and first embodiments described above.
In the zeroth or eleventh configuration, the function of complementing the exposure operation is an exposure correction device.

According to a fifteenth aspect of the present invention, in the fourteenth aspect, the exposure correction amount for complementing the exposure operation is changed according to the state of the filter.

According to a sixteenth aspect of the present invention, there is provided a filter driving means for moving a filter optical system inside and outside of a photographing optical path, a filter effect adjusting driving means for adjusting an effect of the filter optical system, the filter driving means and the filter driving means. Filter control means for controlling the filter effect adjustment driving means, exposure control means for controlling the exposure operation, and general control means for controlling the control of the filter control means and the exposure control so as to be able to overlap in time series. The control unit controls that, when the control of the filter control unit overlaps with the exposure control in a time-series manner, the control unit performs exposure overlapping with the filter control, and performs the exposure operation again after the end of the filter control. Features.

According to a seventeenth aspect of the present invention, in the sixteenth aspect, when the control of the filter control means overlaps the control of the exposure control means in time series, the exposure operation is performed again after the end of the filter control. It is characterized by having selection means for selecting to perform.

[0097]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment will be described with reference to FIGS.

FIG. 1 is a structural view of a main part of a lens shutter camera viewed from above. FIG. 2 is an external perspective view of the lens shutter camera. FIG. 3 is a perspective view of a main part, showing a state in which the filter has entered the optical path of the taking lens. FIG. 4 is a perspective view of a main part, showing a state where the filter is retracted outside the optical path of the taking lens. FIG. 5 is a block diagram showing components. 6 to 9 are operation flowcharts.

In these figures, reference numeral 11 denotes a camera body, and the main parts shown in FIGS.
It is provided in. Reference numeral 12 denotes a photographing lens capable of close-up (macro) photographing, 13 denotes a polarizing filter, 14 denotes a filter holding frame, which holds and fixes the polarizing filter 13, and has an axis parallel to the optical axis of the photographing lens on the outer peripheral front side (subject side). A gear 14a (filter gear) which is rotatably supported by the filter support member 15 and receives rotational power on the rear side (film surface side) is provided.

Reference numeral 15a denotes an advancing / retreating guide portion of the filter supporting member 15, which is provided with an elongated hole 15b which fits with two flanged guide pins 16 implanted in a camera body (not shown). It is slidably interposed between the camera body (not shown) and the guide pin flange 16a and slidable by the elongated hole 15b, and is regulated by a camera body (not shown) with a slight gap in the optical axis direction.

Reference numeral 15c denotes a rack gear provided at the upper end of the advance / retreat guide portion 15a of the filter support member 15, 15d denotes a spring hook provided at the lower end of the advance / retreat guide portion 15a of the filter support member 15, and 17a denotes a camera body (not shown). A spring hook 17b provided is a stopper provided on a camera body (not shown), and as shown in FIG.
The center of rotation of the polarizing filter substantially coincides with the optical axis of the taking lens in a state of contact with the right end 15e of the advancing / retreating guide portion 15a. A tension coil spring 18 is hung between both spring hooks 15d and 17a.
Tension is generated so that 5e and the stopper 17b come into contact with each other.

Reference numeral 19 denotes a filter driving electromagnetic motor (fixed to a camera body (not shown); hereinafter, referred to as a filter driving motor); 110, a motor worm gear;
Is a first two-stage gear composed of a bevel gear 111a and a small gear 111b whose large gear meshes with the motor worm gear 110;
Reference numeral 2 denotes a second two-stage gear in which the large gear 112a meshes with the small gear 111b, and the small gear 112b becomes the sun gear and the planetary gear 11
Meshes with 3. Reference numeral 114 denotes a planet arm which holds the planet gear 113 so as to revolve around the sun gear 112b. An idler gear 115 connects between the planetary gear 113 and the filter gear 14a. The gears 111, 112, and 115 are rotatably supported by a camera body (not shown).

The planetary gear 113 revolves clockwise or counterclockwise around the sun gear 112b by the forward / reverse rotation of the filter drive motor 9, and the idler gear 115
Alternatively, it engages with the rack gear 15c to rotate the polarizing filter 13 and to move in and out of the optical path of the taking lens. These members 15c, 18, 19, 110, 111, 112,
Reference numerals 113 and 114 constitute a means for moving the filter forward and backward.

A phase plate 116 is fixed to the rear end of the filter holding frame 14 (after the filter gear 14a) concentrically with the rotation axis of the polarization filter and has a donut shape that does not block the polarization filter section. The phase plate 116 is made of a thin film such as a lith film, and has a continuous pattern of light-transmitting portions and light-shielding portions.

Reference numeral 116a (FIG. 4) denotes an initial position portion where the light transmitting portion is continuous during a rotation angle larger than the other portions, and a filter rotation provided directly above the photographic lens optical axis with the phase plate 116 interposed therebetween. The pulse generated when the polarizing filter is rotated is counted from the initial position by the photo interrupter 117 as the position detecting means, and the rotational position of the polarizing filter is determined.

Reference numeral 118 denotes a photometric lens, and 119, a photometric sensor (SPC) having a well-known backlight detection function capable of detecting the output of the center and outer periphery of the sensor light receiving surface separately, and integrated with a photometric IC. I have. Immediately after the polarizing filter 13 (the film surface side) for both the photometric lens 118 and the photometric sensor 119
And the light passing through the polarizing filter 13 can be measured. The upper side of the lens 12a, which has little effect on the photographing screen (a rectangular screen which is long in the horizontal direction and short in the vertical direction), is cut to secure a space for disposing the photometric sensor, and the photometric lens 118 and the photometric sensor 119 are not shown. The cylinder does not adversely affect the photographing light and the photometry.

A filter advance / retreat detection switch 120 is turned off when the polarizing filter enters the optical path of the taking lens, and turned on when retracted outside the optical path. Reference numeral 121 denotes a programmable lens shutter that serves both as an aperture and a shutter.
It is arranged so as not to block the optical path to the photometric sensor behind (on the film surface side).

Reference numeral 122 denotes a filter effect setting means provided on the upper surface of the camera exterior. The filter effect setting means is a rotary knob which allows the photographer to selectively set the effect of the polarizing filter 13, and the polarizing filter 13 is moved outside the optical path of the photographing lens. Evacuate “OF
When the "F" position or any other position is selected, the polarizing filter 13 enters the optical path of the photographing lens and is set at a rotational position where the polarizing filter has a maximum effect, and a "MAX" position where the polarizing filter has a minimum effect. "MIN" position, "1/2" position set to a rotation position that is half of the maximum and minimum of the polarization filter effect, and "1" set to a rotation position that is a quarter of the maximum and minimum of the polarization filter effect A "/ 4" position, and a "3/4" position for setting the rotation position to be three-quarters of the maximum and minimum of the polarization filter effect are provided.

Reference numeral 123 denotes an index for selecting each of the above positions, reference numeral 124 denotes a finder objective window, reference numeral 125 denotes an autofocus projection window, reference numeral 126 denotes an autofocus light receiving window, reference numeral 127 denotes a flash emission window, reference numeral 128 denotes a release button, and reference numeral 129 denotes a release button. A film take-up spool, 130 is a film, and 131 is a film cartridge.

Reference numeral 132 denotes control means (CPU) for controlling the entire camera, which functions as a calculation means for performing various calculations based on the photometric value obtained by photometry by rotating the polarization filter, and stores a specific filter rotation position and the like. It also has a function as storage means for performing the operation.

Reference numeral 133 denotes a distance measuring sensor such as a known active auto focus position detecting element (PSD) which receives reflected light from a subject of infrared light emitted from a light emitting element (IRED or the like) not shown. Then, the subject distance is calculated from the light receiving position. The distance measurement calculation and focus adjustment control are all performed by the control unit 132, and the focus adjustment is performed by moving the focus adjustment lens 12b by a lens drive motor (not shown). These form an automatic focusing device.

Reference numeral 134 denotes a motor drive circuit for driving the filter drive motor 19, 135 denotes a strobe circuit for generating a high voltage for emitting strobe light, and 136 denotes a strobe light emitting unit.

Next, the operation of the above configuration will be described with reference to the flowcharts of FIGS.

[Step 1 (S1)] When a main switch (not shown) is turned on, power is supplied to the camera, the photographic lens barrel is extended to a predetermined position, and the photographic preparation is in an initial state.

[Step 2 (S2)] The setting state of the filter effect setting means 122 is monitored. If the setting state is OFF, the polarization filter 13 is set to be retracted out of the optical path of the photographing lens, and the process proceeds to step 3. If it is not OFF, it is determined that the polarization filter 13 has been set to a predetermined state (one of MAX, 3/4, 1/2, 1/4, and MIN positions) in which it has entered the optical path of the taking lens. Proceed to.

[Step 3 (S3)] The state of the filter advance / retreat detection switch 120 is monitored, and the polarization filter 13
It is checked whether or not is surely retracted out of the optical path of the taking lens (the state of FIG. 4). If the switch 120 is ON, the retreat of the polarizing filter 13 is confirmed, and the process proceeds to step S7. If the switch 120 is OFF, the polarization filter 13
Is determined to have entered the optical path of the taking lens (the state shown in FIG. 3), and the process proceeds to step 4a.

[Step 4a (S4a)] Controller 13
2 to the motor drive circuit 134 to the filter drive motor 19
Command to reverse the rotation of the filter drive motor 19
Reverses. In the state shown in FIG. 3, the power of the motor 19 is rotated from the motor worm gear 110 to the first two-stage gear 111 in the clockwise direction and the second two-stage gear 112 to the counterclockwise direction, and the planetary gear 113 is rotated around the sun gear 112b. Revolve clockwise. Therefore, the planetary gear 113, which has been meshing with the idler gear 115, meshes with the rack gear 15c.
A position where the polarizing filter 13 completely retracts the filter support member 15 guided by the elongated hole 15b provided in the advance / retreat guide portion 15a and the guide pin 16 out of the optical path of the taking lens against the tension of the tension coil spring 18 ( (The state of FIG. 4). Then, step 4b shown in FIG.
(Indicated by “a” in FIG. 6).

[Step 4b (S4b)] It is determined whether the release button 128 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned on. ON
If so, proceed to step 4c. 2nd stroke switch
If SW-2 is OFF, proceed to step 5.

[Step 4c (S4c)] Since the release button 128 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON, the control means 132 sends the filter drive motor to the motor drive circuit 134. A command is sent to stop 19, the filter drive motor 19 stops, and the routine jumps to step 8.

[Step 5 (S5)] The state of the filter advance / retreat detection switch 120 is monitored again, and it is checked whether the polarizing filter 13 has reliably retracted out of the optical path of the taking lens (whether the state shown in FIG. 4). If the switch 120 is ON, the retreat of the polarizing filter 13 is confirmed, and the process proceeds to step S6. If the switch 120 is OFF, it is determined that the polarizing filter 13 has not yet retreated outside the optical path of the taking lens, and Step 4 is repeated.

[Step 6 (S6)] A command to stop the filter drive motor 19 is sent from the control means 132 to the motor drive circuit 134, and the filter drive motor 19 stops. Here, tension is applied to the filter support member 15 by the tension coil spring 18 so that the filter support member 15 always enters the photographing lens optical path.
3, the second speed gear 112, the first speed gear 111, and the motor worm gear 110 mesh with each other in the speed increasing direction so that the last speed increasing gear is a worm gear. , Are held in the state of FIG.
Incidentally, in consideration of the possibility that a large shock is applied to the camera to disengage these gears, the advance / retreat guide portion 15a of the filter support member 15 is locked and held in the state of FIG. A locking mechanism (not shown) may be provided to release the locking by the forward rotation of. Next, proceed to step 7.

[Step 7 (S7)] It is determined whether the release button 128 of the camera has been pressed to the first stroke and the first stroke switch SW-1 has been turned on. If it is ON, go to step 8. 1st stroke switch SW-1
If is OFF, the process jumps to step 44.

[Step 8 (S8)] Control means 132
Captures the photometric output from the photometric sensor 119 integrated with the photometric IC, performs AE photometric calculation, and determines an exposure control value.

[Step 9 (S9)] Control means 132
Discloses a known active auto-focus mechanism, in which a light emitting element IRED (not shown) is turned on to project light to a subject, and infrared reflected light from the subject is measured by a distance measuring sensor (PSD).
In step 133, the output based on the received light position is fetched, AF distance calculation is performed, and the photographing lens drive amount for focusing is determined.

[Step 10 (S10)] When the strobe auto mode is selected by the strobe mode setting means (not shown), the AE photometry calculation in step 8 determines that the subject has low brightness requiring strobe light emission. Sometimes
If the strobe mode setting means (not shown) selects the strobe forced light emission, it is determined that the strobe light will be emitted, and the process proceeds to step 36. If it is determined that the strobe does not emit light, the process proceeds to step S11.

[Step 11 (S11)] It is determined whether or not the release button 128 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned on. ON
If so, proceed to step 12. 2nd stroke switch
If SW-2 is OFF, the process returns to step 2.

[Step 12 (S12)] The photographing lens 12 (focus adjustment lens 12b) is driven based on the photographing lens drive amount based on the AF distance measurement calculation result in step 9 to adjust the focus.

[Step 13 (S13)] Based on the exposure control value determined in step 8, the aperture of the lens shutter 121 and the shutter speed are controlled to perform exposure.

[Step 14 (S14)] After the exposure is completed,
The photographing lens 12 driven for focus adjustment is returned to the initial position.

[Step 15 (S15)] The film is wound up by one frame to prepare for the next photographing. Step 2 after winding up
Return to

[Step 16 (S16)] After it is determined in step 2 that the filter effect setting means 122 is other than OFF, the release button 128 of the camera is pressed to the first stroke and the first stroke switch SW-1 is turned on. Is determined. If it is ON, the process proceeds to step 17a. First
Step 4 if the stroke switch SW-1 is OFF
Fly up to 4.

[Step 17a (S17a)] A command is sent from the control means 132 to the motor drive circuit 134 to rotate the filter drive motor 19 forward, and the filter drive motor 19 rotates forward and proceeds to step 17b shown in FIG. (FIG. 6
Middle "b").

[Step 17b (S17b)] It is determined whether or not the release button 128 of the camera is pressed to the second stroke and the second stroke switch SW-2 is turned on.
If it is ON, the process proceeds to step 17d. If the second stroke switch SW-2 is OFF, the process proceeds to step 17c.

[Step 17c (S17c)] It is determined whether or not the polarization filter 13 has been rotated by a predetermined amount. When the rotation by the predetermined amount is completed, the process jumps to step 18. If the rotation by the predetermined amount is not completed, the process jumps to step 17a.

If the state is initially as shown in FIG. 4 in steps 17a-17c, the power of the motor 19 is changed from the motor worm gear 110 to the first two-stage gear 111 counterclockwise and to the second two-stage gear 112 clockwise. To revolve the planetary gear 113 clockwise around the sun gear 112b.

Therefore, the planetary gear 113 meshed with the rack gear 15c is disengaged, and the idler gear 1
The filter support member 15 pulled by the tension coil spring 18 at the same time as meshing with the
3A is moved to a position where it contacts the stopper 17b, the polarizing filter 13 enters a predetermined position in the optical path of the taking lens, and the filter gear 14a meshes with the idler gear 115, resulting in the state of FIG. In the case of the state of FIG. 3, there is no operation from the state of FIG. 4).

Thereafter, the motor 19 continues to rotate forward, and rotates the filter gear 14a in the counterclockwise direction.
The polarization filter 13 held by the filter holding frame 14 integral with the lens a is rotated by a predetermined amount counterclockwise around an axis substantially coincident with the optical axis of the taking lens 12.

[Step 17d (S17d)] Since the release button 128 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 19 is sent from the control means 132 to the motor drive circuit 134, the filter drive motor 19 stops, and the routine jumps to step 8.

[Step 18 (S18)] Control means 13
Reference numeral 2 captures the photometric output from the photometric sensor 119 that receives the subject light that has passed through the polarizing filter 13 while rotating the polarizing filter 13, and performs AE photometric calculation.

[Step 19 (S19)] Step 18
At the same time, the control means 132 controls a light emitting element IRED (not shown) constituting a known active auto focus mechanism.
Is turned on, light is projected on the object, the reflected light from the object is received by the distance measuring sensor (PSD) 133, and the output based on the position is received. Consideration and correction
An F-distance calculation is performed to determine a photographing lens driving amount for focusing.

[Step 20 (S20)] Step 1
At the same time as 8 and 19, the control means 132
Detects and calculates the maximum and minimum values of the photometric output from the camera, associates the photometric output with the number of pulses counted from the initial position of the filter rotational position detecting means (photo interrupter) 117, and sets the photometric output to the maximum and minimum values. Are stored, the rotational position of the polarizing filter 13 when the above is indicated.

[Step 21 (S21)] When the strobe mode setting means (not shown) selects strobe forced light emission, it is determined that the strobe light will be emitted, and the flow advances to step S10. If the strobe does not emit light, the flow advances to step S22.

[Step 22 (S22)] Step 18
Photometry sensor (SPC) 119
If the photometric output difference between the center and the outer periphery of the light receiving surface of the sensor becomes larger than a predetermined value, it is determined that the backlight photography is less effective for the polarizing filter 13 and the process returns to step 4 to return to the photographing lens optical path of the polarizing filter 13. Perform the evacuation operation to the outside. If not, the process proceeds to step S23.

[Step 23 (S23)] Step 18
In the AE photometric calculation in step (a), when it is determined that the low-luminance subject photography in which the maximum value of the photometric output when entering the polarizing filter 13 is smaller than the predetermined value A is taken, the shutter exposure time becomes long and the camera shake may occur if the photography is performed as it is. Since it is necessary to emit strobe light, the process returns to step 4a, and the polarizing filter 13 is retracted out of the optical path of the taking lens. If it is not smaller than the predetermined value A, the process proceeds to step 24.

[Step 24 (S24)] Step 18
When the difference between the maximum value and the minimum value of the photometric output when the polarization filter 13 enters is smaller than the predetermined value B, it is determined that the effect of the polarization filter is small. Of the taking lens out of the optical path. If it is not smaller than the predetermined value B, the process proceeds to step 25.

[Step 25 (S25)] The setting state of the filter effect setting means 122 is monitored, and if it is set to MAX, the flow proceeds to step 26a shown in FIG. Otherwise, go to step 27.

[Step 26a (S26a)] From the control means 132 to the motor drive circuit 134, the polarization filter 13 is set to the storage position where the photometric output with the greatest effect of the polarization filter in step 20 shows the minimum value. The control signal is transmitted, and the pulse of the filter rotational position detecting means (photo interrupter) 117 from the initial position is counted.

[Step 26b (S26b)] It is determined whether or not the release button 128 of the camera is pressed to the second stroke and the second stroke switch SW-2 is turned on.
If it is ON, the process proceeds to step 26e. If the second stroke switch SW-2 is OFF, the process proceeds to step 26c.

[Step 26c (S26c)] If the desired position is obtained by counting the pulses of the filter rotation position detecting means (photo interrupter) 117 from the initial position, the flow advances to step 26d. When the pulse count of the filter rotation position detecting means (photo interrupter) 117 is not at the desired position, the flow returns to 26b.

[Step 26d (S26d)] The drive of the filter drive motor 19 is stopped, and the process proceeds to step 11.

[Step 26e (S26e)] Since the release button 128 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 19 is sent from the control means 132 to the motor drive circuit 134, the filter drive motor 19 stops, and the routine jumps to step 12.

[Step 27 (S27)] The setting state of the filter effect setting means 122 is monitored, and if it is set to 3/4, the flow advances to step 28a shown in FIG. Otherwise, go to step 29.

[Step 28a (S28a)] The filter rotation angle between the storage position where the photometric output shows the minimum value and the storage position where the photometric output shows the maximum value in step 20 is divided into four equal parts. The effect of the polarizing filter shifted to the minimum value side is the second largest (the filter effect is MAX-MIN
The control signal is transmitted from the control means 132 to the motor drive circuit 134 so as to set the polarization filter 13 at the position (3/4 image), and the pulse of the filter rotation position detection means (photo interrupter) 17 from the initial position is counted.

[Step 28b (S28b)] It is determined whether or not the release button 128 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned ON.
If it is ON, the process proceeds to step 28e. If the second stroke switch SW-2 is OFF, the process proceeds to step 28c.

[Step 28c (S28c)] If the desired position is obtained from the initial position of the filter rotation position detecting means (photo interrupter) 117, the process proceeds to step 28d. If the pulse count of the filter rotation position detecting means (photo interrupter) 117 is not at the desired position, the process returns to step 28b.

[Step 28d (S28d)] The drive of the filter drive motor 19 is stopped, and then the flow proceeds to step 11.

[Step 28eS28e] When the release button 128 of the camera is pressed to the second stroke,
Since the stroke switch SW-2 is determined to be ON, a command to stop the filter drive motor 19 is sent from the control means 132 to the motor drive circuit 134, the filter drive motor 19 stops, and the routine jumps to step 12.

[Step 29 (S29)] The setting state of the filter effect setting means 122 is monitored, and if it is set to 1/2, the flow advances to step 30a shown in FIG. Otherwise, go to step 31.

[Step 30a (S30a)] The filter rotation angle between the storage position where the photometric output shows the minimum value and the storage position where the photometric output shows the maximum value in step 20 is divided into four equal parts. A control signal is transmitted from the control means 132 to the motor drive circuit 134 to set the polarization filter 13 at a position where the effect of the polarization filter is intermediate (the filter effect is a half image of MAX-MIN), and the filter is rotated from the initial position. Position detecting means (photo interrupter)
117 pulses are counted.

[Step 30b (S30b)] It is determined whether or not the release button 128 of the camera is pressed to the second stroke and the second stroke switch SW-2 is turned on.
If it is ON, the process proceeds to step 30e. If the second stroke switch SW-2 is OFF, the process proceeds to step 30c.

[Step 30c (S30c)] If the desired position is obtained from the initial position of the filter rotation position detecting means (photo interrupter) 117, the process proceeds to step 30d. If the pulse count of the filter rotation position detecting means (photo interrupter) 117 is not at the desired position, the process returns to step 30b.

[Step 30d (S30d)] The drive of the filter drive motor 19 is stopped, and then the process proceeds to step 11.

[Step 30e (S30e)] Since the release button 128 of the camera is pushed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 19 is sent from the control means 132 to the motor drive circuit 134, the filter drive motor 19 stops, and the routine jumps to step 12.

[Step 31 (S31)] The setting state of the filter effect setting means 122 is monitored, and if it is set to 1/4, the flow advances to step 32a shown in FIG. Otherwise, go to step 33.

[Step 32a (S32a)] The filter rotation angle between the storage position where the photometric output shows the minimum value and the storage position where the photometric output shows the maximum value in step 20 is divided into four equal parts. The effect of the polarizing filter shifted to the maximum value side is the second smallest (the filter effect is MAX-MIN
A control signal is transmitted from the control means 132 to the motor drive circuit 134 so as to set the polarization filter 13 at a position (１ ／ image of the above), and the pulses of the filter rotation position detection means (photo interrupter) 117 from the initial position are counted.

[Step 32b (S32b)] It is determined whether or not the release button 128 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned ON.
If it is ON, the process proceeds to step 32e. If the second stroke switch SW-2 is OFF, the process proceeds to step 32c.

[Step 32c (S32c)] If the desired position is obtained by counting the pulses of the filter rotation position detecting means (photo interrupter) 117 from the initial position, the flow advances to step 32d. If the pulse count of the filter rotation position detection means (photo interrupter) 117 is not at the desired position, the flow returns to step 32b.

[Step 32d (S32d)] The drive of the filter drive motor 19 is stopped, and then the flow proceeds to step 11.

[Step 32e (S32e)] Since the release button 128 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 19 is sent from the control means 132 to the motor drive circuit 134, the filter drive motor 19 stops, and the routine jumps to step 12.

[Step 33 (S33)] The setting state of the filter effect setting means 122 is monitored, and if it is set to MIN, the flow advances to step 34a shown in FIG. Otherwise, go to step 35.

[Step 34a (S34a)] From the control means 132, the motor drive circuit 134 is set so that the polarization filter 13 is set at the storage position where the photometric output with the smallest effect of the polarization filter 13 at step 20 shows the maximum value. The control signal is transmitted, and the pulse of the filter rotational position detecting means (photo interrupter) 117 from the initial position is counted.

[Step 34b (S34b)] It is determined whether or not the release button 128 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned on.
If it is ON, the process proceeds to step 34e. If the second stroke switch SW-2 is off, the process proceeds to step 34c.

[Step 34c (S34c)] If the desired position is obtained from the initial position of the filter rotation position detecting means (photo interrupter) 117, the process proceeds to step 34d. When the pulse count of the filter rotation position detection means (photo interrupter) 117 is not at the desired position, the process returns to step 34b.

[Step 34d (S34d)] The drive of the filter drive motor 19 is stopped, and then the flow proceeds to step 11.

[Step 34e (S34e)] Since the release button 128 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been determined to be ON,
A command to stop the filter drive motor 19 is sent from the control means 132 to the motor drive circuit 134, the filter drive motor 19 stops, and the routine jumps to step 12.

[Step 35 (S35)] It is determined that a problem such as poor contact of the filter effect setting means 122 has occurred.
The control signal is transmitted from the control means 132 to the motor drive circuit 134, and the drive of the filter drive motor 19 is stopped at the rotation initial position of the polarization filter 13 based on the pulse of the filter rotation position detection means (photo interrupter) 117. After that, the operation of the camera is prohibited.

[Step 36 (S36)] Step 10
If it is determined that the strobe light is emitted and the calculated distance measurement value obtained in step 9 is larger than a predetermined close distance C that enters the macro shooting area, it is determined that shooting is performed at a normal distance, and step S9 is performed. Proceed to 37. If not, it is regarded as close-up shooting (macro shooting), and step 4
Proceed to 1.

[Step 37 (S37)] It is determined whether or not the release button 28 of the camera is pressed to the second stroke and the second stroke switch SW-2 is turned on. If it is ON, the process proceeds to step 38. 2nd stroke switch SW
If -2 is OFF, the process returns to step 2.

[Step 38 (S38)] If the flow has passed through the flow of step 9, the process proceeds to step 9 and step 19
The flow of the photographing lens 2 based on the photographing lens driving amount based on the AF distance measurement calculation result of step 19
(Focus adjusting lens 2b) is driven to adjust the focus.

[Step 39 (S39)] If the flow has passed through the flow of step 8, step 8 is executed.
In this case, the aperture of the lens shutter 121 and the shutter speed are controlled based on the exposure control value determined in step 18, and the flash is emitted to perform exposure. Thereafter, the process proceeds to step S14.

[Step 40 (S40)] Step 21
After it is determined that the strobe light is emitted, step 19
When it is determined that the calculated distance measurement value obtained in the step (c) is larger than the predetermined close distance C that enters the macro shooting area, it is determined that shooting is performed at a normal distance, and the process returns to step 4 to return to the polarization filter 13.
Of the taking lens out of the optical path. Otherwise, it is regarded as close-range shooting (macro shooting), and the process proceeds to step S11.

[Step 41 (S41)] Control means 13
2 to the motor drive circuit 134 to the filter drive motor 19
Is sent to rotate the filter drive motor 19 in the forward direction.
Turns forward. In the state shown in FIG. 4 at the beginning after step 36, the power of the motor 19 is rotated from the motor worm gear 110 to the first second gear 111 in a counterclockwise direction and the second second gear 112 to a clockwise direction. The planetary gear 113 revolves clockwise around the sun gear 112b. Therefore, the planetary gear 113 meshed with the rack gear 15c is disengaged and meshes with the idler gear 115, and at the same time, the filter supporting member 15 pulled by the tension coil spring 18 pushes the right end 15e of the advance / retreat guide 15a to the stopper 17b. 3 and the polarizing filter 13 enters a predetermined position in the optical path of the taking lens, and the filter gear 14a meshes with the idler gear 115 to be in the state shown in FIG. 3 (from the beginning of FIG. If the state is the state, there is no operation from the state of FIG. After that, the motor 19 continues to rotate forward, and rotates the filter gear 14a counterclockwise.
The rotation of the polarizing filter 13 held by the filter holding frame 14 integrated with the imaging lens 12 in a counterclockwise direction around an axis substantially coincident with the optical axis of the taking lens 12. Then, step 42 shown in FIG.
Proceed to a.

[Step 42a (S42a)] The position is substantially determined by the positional relationship of the built-in strobe of the camera, and the light emitted from the strobe is reflected by a close subject (a mainly flat subject such as a copy having a particularly smooth surface). Then, a control signal is transmitted from the control means 132 to the motor drive circuit 134 so as to set the polarization filter 13 to a pre-stored rotational position of the polarization filter 13 which can most effectively prevent the light from entering the photographing lens, The pulse of the filter rotational position detecting means (photo interrupter) 117 from the initial position is counted.

[Step 42b (S42b)] It is determined whether the release button 128 of the camera is pressed to the second stroke and the second stroke switch SW-2 is turned on.
If it is ON, the process proceeds to step 42e. If the second stroke switch SW-2 is OFF, the process proceeds to step 42c.

[Step 42c (S42c)] If the pulse count of the filter rotational position detecting means (photo interrupter) 117 from the initial position has reached a desired position, the flow advances to step 42d. If the pulse count of the filter rotation position detecting means (photo interrupter) 117 is not at the desired position, the process returns to step 42b.

[Step 42d (S42d)] The drive of the filter drive motor 19 is stopped, and then the flow proceeds to step 11.

[Step 42e (S42e)] Since the release button 128 of the camera is pushed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 19 is sent from the control means 132 to the motor drive circuit 134, the filter drive motor 19 stops, and the routine jumps to step 11.

[Step 44 (S44)] The state of the main switch (not shown) is monitored. If it is ON, the process returns to step 2 and repeats thereafter. If OFF, step 45
Proceed to.

[Step 45 (S45)] The photographing lens barrel is retracted, and the power supply to the camera is cut off.

The above steps 4 (4a to 4c), 17
(17a-17d), 26 (26a-26e), 28
(28a-28e), 30 (30a-30e), 32
(32a-32e), 34 (34a-34e), 42
By providing the general control means having the camera sequences (42a to 42e), the control of the filter can be overlapped in time series with at least one of the focus control and the exposure control, and the release time lag can be reduced.

Also, the above step 4 (4a-4c),
17 (17a-17d), 26 (26a-26e), 2
8 (28a to 28e), 30 (30a to 30e), 32
(32a-32e), 34 (34a-34e), 42
By providing the general control means having the camera sequence of (42a to 42e), when the control of the filter overlaps at least one of the focusing control and the exposure control in time series, the control of the filter is stopped, and the filter driving motor is stopped. By restarting post-exposure filter control without supplying power to the power supply, efficiency and stabilization of the power supply during focusing control and exposure control can be achieved.

As described above, according to the first embodiment, in a camera capable of automatically performing an operation of attaching a filter to a photographing optical system and an operation of adjusting a filter for exhibiting the effect of the filter, the operation of the filter during the operation of the filter. By reducing the possibility of missing a photo opportunity and securing the original quick shooting performance of the camera, it is possible to realize a camera that is easy to use for camera users who want the quick shooting performance and feeling of use of a conventional camera.

The additional function of a built-in filter does not cause an increase in the size and cost of the camera and does not reduce the original performance of quick shooting, and the efficiency of the power supply during focusing control and exposure control is improved. By realizing the improvement of the stability, it is possible to easily incorporate the polarization filter and make it electrically driven.

The above embodiment is not limited to a camera, but has the same effect in a lens and camera system having the same configuration.

(Second Embodiment) A second embodiment will be described with reference to FIGS.

FIG. 10 is a main part configuration diagram of the lens shutter camera viewed from above. FIG. 11 is an external perspective view of a lens shutter camera. FIG. 12 is a perspective view of a main part, showing a state where the filter has entered the optical path of the taking lens. FIG. 13 is a perspective view of a main part, showing a state where the filter is retracted outside the optical path of the taking lens. FIG. 14 is a block diagram showing components. 15 to 19 are operation flowcharts.

In these figures, reference numeral 21 denotes a camera body, and all the main parts shown in FIGS. 10 and 11 are provided in the camera body 21. Reference numeral 22 denotes a photographing lens capable of close-up (macro) photographing, reference numeral 23 denotes a polarizing filter, reference numeral 24 denotes a filter holding frame which holds and fixes the polarizing filter 23, and an axis which is parallel to the optical axis of the photographing lens at the outer front side (subject side). A gear 24a (filter gear) that is rotatably supported by the filter support member 25 and receives rotational power on the rear side (film surface side) of the outer periphery is provided.

Reference numeral 25a denotes an advancing / retreating guide portion of the filter supporting member 25, which is provided with an elongated hole 25b fitted with two flanged guide pins 26 implanted in a camera body (not shown). It is slidably interposed between the camera body (not shown) and the guide pin flange 26a and slidable by the elongated hole 25b, and is regulated by the camera body (not shown) with a slight gap in the optical axis direction.

Reference numeral 25c denotes a rack gear provided at the upper end of the advance / retreat guide portion 25a of the filter support member 25, 25d denotes a spring hook provided at the lower end of the advance / retreat guide portion 25a of the filter support member 25, and 27a denotes a camera body (not shown). A spring hook 27b provided is a stopper provided on the camera body (not shown), and as shown in FIG.
5, the rotation center of the polarizing filter and the optical axis of the photographing lens substantially coincide with each other in a state of contact with the right end 25e of the forward / backward guide portion 25a.

Numeral 28 denotes a tension coil spring, which is a double spring hook.
The tension is generated between 5d and 27a so that 25e and stopper 27b come into contact with each other in the state of FIG.

Reference numeral 29 denotes a filter driving electromagnetic motor (fixed to a camera body (not shown); hereinafter, referred to as a filter driving motor); 210, a motor worm gear;
21 is a first two-stage gear composed of a bevel gear 211a and a small gear 211b whose large gear meshes with the motor worm gear 210;
Reference numeral 2 denotes a second two-stage gear in which the large gear 212a meshes with the small gear 211b, and the small gear 212b becomes the sun gear and the planetary gear 21
Meshes with 3. Reference numeral 214 denotes a planetary arm which holds the planetary gear 213 so as to revolve around the sun gear 212b.

An idler gear 215 connects between the planet gear 213 and the filter gear 24a. Gear 211, 21
Reference numerals 2 and 215 are rotatably supported by a camera body (not shown). Further, the planetary gear 213 revolves clockwise or counterclockwise around the sun gear 212b by forward / reverse rotation of the filter drive motor 9, meshes with the idler gear 215 or the rack gear 25c, rotates the polarizing filter 23, and rotates the taking lens. It moves in and out of the optical path. These 25
c, 28, 29, 210, 211, 212, 213, 2
14 constitutes a filter moving means.

A phase plate 216 is fixed to the rear end of the filter holding frame 24 (after the filter gear 24a) concentrically with the axis of rotation of the polarizing filter and has a donut shape that does not block the polarizing filter section. The phase plate 216 is made of a thin film such as a lith film, and has a continuous pattern of a light-transmitting portion and a light-shielding portion.

Reference numeral 216a (FIG. 13) is an initial position portion where the light transmitting portion is continuous during a rotation angle larger than the other portions, and a filter rotation position provided immediately above the photographic lens optical axis with the phase plate 216 interposed therebetween. Photointerrupter 21 as detection means
According to 7, the pulses generated when the polarization filter is rotated are counted from the initial position to determine the rotation position of the polarization filter.

Reference numeral 218 denotes a photometric lens, and 219, a photometric sensor (SPC) having a well-known backlight detection function capable of detecting the output of the center and outer periphery of the light receiving surface of the sensor separately.
C and integrated. Both the photometric lens 218 and the photometric sensor 219 are disposed immediately after the polarizing filter 23 (on the film surface side), and can measure light passing through the polarizing filter 23.

The upper side of the lens 22a which has little effect on the photographing screen (a rectangular screen which is long in the horizontal direction and short in the vertical direction) is cut to secure a space for disposing the photometric sensor.
The light metering lens 218 and the light metering sensor 219 have a light-shielding tube (not shown) so as not to adversely affect the photographing light and the light metering.

Reference numeral 220 denotes a filter advance / retreat detection switch, which is turned off when the polarizing filter enters the photographic lens optical path and turned on when retracted outside the optical path. Reference numeral 221 denotes a programmable lens shutter that also serves as an aperture and a shutter, and is arranged behind the polarizing filter 23 (on the film surface side) so as not to block the optical path to the photometric sensor.

Reference numeral 222 denotes a filter effect setting means provided on the upper surface of the camera exterior. The filter effect setting means 222 is a rotary knob which allows the photographer to selectively set the effect of the polarizing filter 23. Polarization filter 2 when selecting the OFF position to retract and other positions
3 enters the optical path of the photographing lens and sets a “MAX” position for setting a rotation position where the polarization filter has the maximum effect, and a “MI” position for setting a rotation position where the polarization filter has the minimum effect.
"N" position, "1/2" position set at a rotation position that is half of the maximum and minimum of the polarizing filter effect, and "1/4" position set at a rotation position that is a quarter of the maximum and minimum of the polarizing filter effect The position is set to a rotation position that is three-quarters of the maximum and minimum of the polarization filter effect.
4 "positions are provided.

223 is an index to be selected when selecting each of the above positions, 224 is a finder objective window, 225 is an autofocus light emission window, 226 is an autofocus light reception window, 227 is a strobe light emission window, 228 is a release button, and 229 is a release button. The film take-up spool 230 is a film, and 231 is a film cartridge.

Reference numeral 232 denotes control means (CPU) for controlling the entire camera, which functions as a calculation means for performing various calculations based on the photometric value obtained by photometry by rotating the polarization filter, and a specific filter rotation position and filter control. It also has a function as a storage unit for storing a complement mode and the like.

Reference numeral 233 denotes a well-known distance measuring sensor such as a position detecting element (PSD) for active auto focus, which receives infrared light reflected from a subject and projected from an unillustrated light projecting element (such as an IRED). Then, the subject distance is calculated from the light receiving position. All of the distance measurement calculation and focus adjustment control are performed by the control unit 232, and the focus adjustment is performed by moving the focus adjustment lens 22b by a lens drive motor (not shown). These form an automatic focusing device.

Reference numeral 234 denotes a motor drive circuit for driving the filter drive motor 29, reference numeral 235 denotes a flash circuit for generating a high voltage for emitting a flash, and reference numeral 236 denotes a flash light emitting unit.

In the present embodiment, reference numeral 240 denotes a filter complement setting means provided on the upper surface of the camera exterior, which is a rotary knob by which the photographer can selectively set a complement function of filter control complement. Function "OFF"
When selecting a position or any other position, select "Strobe complement" to select the flash as a filter control complement function, select "Exposure compensation complement" to select the exposure compensation as a filter control complement function, and automatically select the filter control complement function. An "auto complement" position is provided. An index 241 is used when selecting each of the positions.

Next, the operation of the above configuration will be described with reference to FIGS.
Will be described along the flowchart of FIG.

[Step 1 (S1)] When a main switch (not shown) is turned on, power is supplied to the camera, the photographing lens barrel is extended to a predetermined position, and the photographing preparation is in an initial state.

[Step 2 (S2)] The setting state of the filter effect setting means 222 is monitored. If the setting state is OFF, the polarization filter 23 is set to be retracted out of the optical path of the photographing lens, and the flow advances to step 3. If it is not OFF, it is determined that the polarization filter 23 has been set to a predetermined state (any of MAX, 3/4, 1/2, 1/4, and MIN positions) that has entered the optical path of the taking lens. Proceed to.

[Step 3 (S3)] The state of the filter advance / retreat detection switch 220 is monitored, and the polarization filter 23
Is checked to ensure that it has been retracted out of the optical path of the taking lens (the state shown in FIG. 13). If the switch 220 is ON, the retreat of the polarizing filter 23 is confirmed, and the process proceeds to step S7. If the switch 220 is OFF, the polarization filter 23
Is determined to have entered the optical path of the taking lens (the state shown in FIG. 12), and the process proceeds to step 4a (details are shown in FIG. 17).

[Step 4a (S4a)] Controller 23
2 to the motor drive circuit 234 to the filter drive motor 29
Command is sent to reverse the
Reverses. In the state shown in FIG. 12, the power of the motor 29 is rotated from the motor worm gear 210 to the first two-stage gear 211 clockwise and the second two-stage gear 212 counterclockwise, and the planetary gear 213 is rotated around the sun gear 212b. Revolve clockwise.

Therefore, the planetary gear 213 which has meshed with the idler gear 215 so far meshes with the rack gear 25c, and resists the tension of the tension coil spring 28, and the elongated hole 25b provided in the advance / retreat guide portion 25a and the guide pin. The filter support member 25 guided by 26 is rotated until the polarizing filter 23 moves to a position (the state shown in FIG. 13) where the polarizing filter 23 is completely retracted out of the optical path of the taking lens.

[Step 4b (S4b)] It is determined whether the release button 228 of the camera is pressed to the second stroke and the second stroke switch SW-2 is turned on. ON
If so, proceed to step 4c. 2nd stroke switch
If SW-2 is OFF, proceed to step 5.

[Step 4c (S4c)] Since the release button 228 of the camera is pushed to the second stroke and the second stroke switch SW-2 is determined to be ON, the filter driving motor is sent from the control means 232 to the motor driving circuit 234. The command to stop the filter 29 is sent, the filter drive motor 29 is stopped, the filter control complement mode shown in FIG. 19 is set to ON, and the routine jumps to step S8.

[Step 5 (S5)] The state of the filter advance / retreat detection switch 220 is monitored again, and it is checked whether the polarizing filter 23 has reliably retracted out of the optical path of the taking lens (whether the state shown in FIG. 13). If the switch 220 is ON, the retreat of the polarizing filter 23 is confirmed, and the process proceeds to step 6. If the switch 220 is OFF, it is determined that the polarizing filter 23 has not yet retreated outside the optical path of the taking lens, and Step 4 is repeated.

[Step 6 (S6)] A command to stop the filter drive motor 29 is sent from the control means 232 to the motor drive circuit 234, and the filter drive motor 29 stops. Here, tension is applied to the filter support member 25 by the tension coil spring 28 so that the filter support member 25 always enters the photographing lens optical path.
3. Since the second speed gear 212, the first speed gear 211, and the motor worm gear 210 mesh with each other in the speed increasing direction so that the last speed increasing gear is a worm gear, the gear 28 does not reverse with the tension of the spring 28. , Are held in the state of FIG.

In consideration of a possibility that a large shock is applied to the camera and the gears may be disengaged from each other, the advance / retreat guide portion 25a of the filter support member 25 should be moved to the position shown in FIG.
A locking mechanism (not shown) may be provided so as to lock and hold in the state of 3 and release the lock by the forward rotation of the filter drive motor 29. Next, proceed to step 7.

[Step 7 (S7)] It is determined whether the release button 228 of the camera has been pressed to the first stroke and the first stroke switch SW-1 has been turned on. If it is ON, go to step 8. 1st stroke switch SW-1
If is OFF, the process jumps to step 44.

[Step 8 (S8)] Control means 232
Captures the photometric output from the photometric sensor 219 integrated with the photometric IC, performs AE photometric calculation, and determines an exposure control value.

[Step 9a (S9a)] Control means 23
Reference numeral 2 denotes a light-emitting element IRED (not shown) which constitutes a known active auto-focus mechanism, emits light to a subject, and detects infrared reflected light from the subject by a distance measuring sensor (PSD).
The output based on the position received at 233 is taken, AF distance calculation is performed to determine the drive amount of the photographing lens for focusing, and the process proceeds to the complement mode of step 9b shown in FIG.

[Step 9b (S9b)] Control means 23
2 uses the storage unit and the filter complement setting unit in the control unit 232 to determine whether to enable the filter control complement mode. If the filter complement setting means is other than the "OFF" position and the filter control complement mode is on, the process jumps to 9c. Otherwise, jump to 20.

[Step 9c (S9c)] It is determined whether the flash complement position is selected by the filter complement setting means. If YES, the process jumps to step 36, and if NO, the process jumps to step 9d.

[Step 9d (S9d)] It is determined whether or not the exposure correction complement position has been selected by the filter complement setting means. If YES, the flow jumps to 9e, and if NO, the flow jumps to 9f.

[Step 9e (S9e)] The exposure correction value is obtained according to the state of the polarizing filter 23, and the exposure control value is reset accordingly, and the routine jumps to step 10.

[Step 9f (S9f)] The method of complementing the filter control is determined according to the state of the polarizing filter 23, the exposure control value, and the result of the AF ranging calculation. 9c when strobe is selected as the filter control complement function
If the exposure correction is selected, jump to 9d.

[Step 10 (S10)] If the strobe auto mode is selected by the strobe mode setting means (not shown), it is determined by the AE photometry calculation in step 8 that the subject has low brightness requiring strobe light emission. Sometimes
If the strobe mode setting means (not shown) selects the strobe forced light emission, it is determined that the strobe light will be emitted, and the process proceeds to step 36. If it is determined that the strobe does not emit light, the process proceeds to step S11.

[Step 11 (S11)] It is determined whether the release button 228 of the camera is pressed to the second stroke and the second stroke switch SW-2 is turned on. ON
If so, proceed to step 12. 2nd stroke switch
If SW-2 is OFF, the process returns to step 2.

[Step 12 (S12)] The photographing lens 22 (focus adjusting lens 22b) is driven based on the photographing lens drive amount based on the AF distance measurement calculation result in step 9 to adjust the focus.

[Step 13 (S13)] The lens shutter 221 is operated based on the exposure control value determined in step 8.
The aperture and shutter speed are controlled to perform exposure, and the process proceeds to step 14a shown in FIG.

[Step 14a (S14a)] The filter control complement mode is set to OFF.

[Step 14b (S14b)] After the exposure is completed, the photographing lens 22 driven for focus adjustment is returned to the initial position.

[Step 15 (S15)] The film is wound up by one frame to prepare for the next photographing. Step 2 after winding up
Return to

[Step 16 (S16)] After it is determined in step 2 that the filter effect setting means 222 is other than OFF, the release button 228 of the camera is pressed to the first stroke and the first stroke switch SW-1 is turned on. Is determined. If it is ON, the process proceeds to step S17. If the first stroke switch SW-1 is OFF, step 44
Fly up to.

[Step 17a (S17a)] A command is sent from the control means 232 to the motor drive circuit 234 to rotate the filter drive motor 29 forward, and the filter drive motor 29 rotates forward. Then, step 17b shown in FIG.
(Indicated by "b" in FIG. 15).

[Step 17b (S17b)] It is determined whether the release button 228 of the camera is pressed to the second stroke and the second stroke switch SW-2 is turned on.
If it is ON, the process proceeds to step 17d. If the second stroke switch SW-2 is OFF, the process proceeds to step 17c.

[Step 17c (S17c)] It is determined whether or not the polarization filter 23 has been rotated by a predetermined amount. When the rotation by the predetermined amount is completed, the process jumps to step 18. If the rotation by the predetermined amount is not completed, the process jumps to step 17a. Step 17a
Due to −17d, when the state is initially as shown in FIG. 13,
The power of the motor 29 is transmitted from the motor worm gear 210 to the first
The two-stage gear 211 is rotated counterclockwise, the second two-stage gear 212 is rotated clockwise, and the planetary gear 213 is rotated by the sun gear 212b.
Revolve clockwise around. Therefore, the planetary gear 213 meshed with the rack gear 25c is disengaged and meshes with the idler gear 215. At the same time, the filter supporting member 25 pulled by the pulling coil spring 28 pushes the right end 25e of the advance / retreat guide portion 25a to the stopper 27b.
And the polarizing filter 23 enters a predetermined position in the optical path of the taking lens, and the filter gear 24a meshes with the idler gear 215 to be in the state shown in FIG. 12 (the state shown in FIG. Is the aforementioned Figure 1
There is no operation from the state of No. 3). After that, the motor 29 continues to rotate forward, and rotates the filter gear 24a counterclockwise.
The polarizing filter 23 held by the filter holding frame 24 integrated with the filter gear 24a is rotated by a predetermined amount counterclockwise around an axis substantially coincident with the optical axis of the taking lens 22.

[Step 17d (S17d)] Since the release button 228 of the camera is pushed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 29 is sent from the control means 232 to the motor drive circuit 234, the filter drive motor 29 is stopped, the filter control complement mode is set to ON, and the routine jumps to step S8.

[Step 18 (S18)] Control means 23
2 captures the photometric output from the photometric sensor 219 that receives the subject light that has passed through the polarizing filter 23 while rotating the polarizing filter 23, and performs AE photometric calculation.

[Step 19 (S19)] Step 18
At the same time, the control means 232 controls a light emitting element IRED (not shown) constituting a known active auto focus mechanism.
Is turned on, light is projected on the object, the reflected light from the object is received by a distance measuring sensor (PSD) 233, and the output of the position is received. Consideration and correction
An F-distance calculation is performed to determine a photographing lens driving amount for focusing.

[Step 20 (S20)] Step 1
At the same time as 8 and 19, the control means 232
The maximum value and the minimum value of the photometric output from the CPU are detected and calculated, and the photometric output is associated with the pulse count from the initial position of the filter rotational position detecting means (photo interrupter) 217, so that the photometric output is the maximum value and the minimum value. Are stored, the rotational position of the polarizing filter 23 when the above is indicated.

[Step 21 (S21)] If the strobe mode is selected by the strobe mode setting means (not shown), it is determined that the strobe emits light, and the flow advances to step S20. If the strobe does not emit light, the flow advances to step S22.

[Step 22 (S22)] Step 28
Photometric sensor (SPC) 219 by AE photometric calculation in
When the difference between the photometric output between the center and the outer periphery of the light receiving surface of the sensor is larger than a predetermined value, it is determined that the backlight photography is less effective with the effect of the polarizing filter 23, and the process returns to step 4, and the photographing lens optical path of the polarizing filter 23 Perform the evacuation operation to the outside. If not, the process proceeds to step S23.

[Step 23 (S23)] Step 18
In the AE photometric calculation in step (a), when it is determined that the low-luminance subject photography in which the maximum value of the photometric output when the polarizing filter 13 enters is smaller than the predetermined value A, if the photographing is performed as it is, the shutter exposure time becomes longer and the camera shake becomes longer. Since there is a possibility that the strobe light needs to be emitted, the process returns to step 4 and the retreat operation of the polarizing filter 13 out of the optical path of the taking lens is performed. If it is not smaller than the predetermined value A, the process proceeds to step 24.

[Step 24 (S24)] Step 18
If the difference between the maximum value and the minimum value of the photometric output when entering the polarizing filter 23 is smaller than the predetermined value B, it is determined that the effect of the polarizing filter is small.
Then, the retracting operation of the polarizing filter 23 out of the optical path of the photographing lens is performed. If not smaller than the predetermined value B, step 2
Go to 5.

[Step 25 (S25)] The setting state of the filter effect setting means 222 is monitored, and if it is set to MAX, the flow advances to step 26a shown in FIG. Otherwise, go to step 27.

[Step 26a (S26a)] The control means 232 controls the motor drive circuit 234 so that the polarization filter 23 is set at the storage position where the photometric output with the greatest effect of the polarization filter in step 20 shows the minimum value. A signal is transmitted, and pulses of the filter rotational position detecting means (photo interrupter) 217 from the initial position are counted.

[Step 26b (S26b)] It is determined whether or not the release button 228 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned on.
If it is ON, the process proceeds to step 26e. If the second stroke switch SW-2 is OFF, the process proceeds to step 26c.

[Step 26c (S26c)] If the desired position has been obtained from the initial position of the filter rotation position detecting means (photo interrupter) 217, the process proceeds to step 26d. If the pulse count of the filter rotation position detection means (photo interrupter) 217 is not at the desired position, the process returns to 26b.

[Step 26d (S26d)] The drive of the filter drive motor 29 is stopped, and the process proceeds to step 11.

[Step 26e (S26e)] Since the release button 228 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 29 is sent from the control means 232 to the motor drive circuit 234, the filter drive motor 29 is stopped, the filter control complement mode is set to ON, and the routine jumps to step 9b.

[Step 27 (S27)] The setting state of the filter effect setting means 222 is monitored, and if it is set to 3/4, the flow advances to step 28a shown in FIG. Otherwise, go to step 29.

[Step 28a (S28a)] The filter rotation angle between the storage position at which the photometric output shows the minimum value in step 20 and the storage position at which the photometric output shows the maximum value is divided into four equal parts. The effect of the polarizing filter shifted to the minimum value side is the second largest (the filter effect is MAX-MIN
The control signal is transmitted from the control means 232 to the motor drive circuit 234 so as to set the polarization filter 23 at the position (3/4 image), and the pulse of the filter rotation position detection means (photo interrupter) 27 from the initial position is counted.

[Step 28b (S28b)] It is determined whether the release button 228 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned on.
If it is ON, the process proceeds to step 28e. If the second stroke switch SW-2 is OFF, the process proceeds to step 28c.

[Step 28c (S28c)] If the pulse count of the filter rotational position detecting means (photo interrupter) 217 from the initial position reaches a desired position, the flow advances to step 28d. If the pulse count of the filter rotation position detecting means (photo interrupter) 217 is not at the desired position, the process returns to step 28b.

[Step 28d (S28d)] The drive of the filter drive motor 29 is stopped, and then the flow proceeds to step 11.

[Step 28e (S28e)] Since the release button 228 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 29 is sent from the control means 232 to the motor drive circuit 234, the filter drive motor 29 is stopped, the filter control complement mode is set to ON, and the routine jumps to step 9b.

[Step 29 (S29)] The setting state of the filter effect setting means 222 is monitored, and if it is set to 1/2, the flow advances to step 30a shown in FIG. Otherwise, go to step 31.

[Step 30a (S30a)] The filter rotation angle between the storage position at which the photometric output shows the minimum value in step 20 and the storage position at which the photometric output shows the maximum value is divided into four equal parts. A control signal is transmitted from the control means 232 to the motor drive circuit 234 so that the polarization filter 23 is set at a position where the effect of the polarization filter is intermediate (the filter effect is a half image of MAX-MIN), and the filter is rotated from the initial position. Position detecting means (photo interrupter)
217 pulses are counted.

[Step 30b (S30b)] It is determined whether or not the release button 228 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned ON.
If it is ON, the process proceeds to step 30e. If the second stroke switch SW-2 is OFF, the process proceeds to step 30c.

[Step 30c (S30c)] If the pulse count of the filter rotational position detecting means (photo interrupter) 217 from the initial position reaches a desired position, the flow advances to step 30d. If the pulse count of the filter rotation position detection means (photo interrupter) 217 is not at the desired position, the process returns to step 30b.

[Step 30d (S30d)] The drive of the filter drive motor 29 is stopped, and then the flow proceeds to step 11.

[Step 30e (S30e)] Since the release button 228 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 29 is sent from the control means 232 to the motor drive circuit 234, the filter drive motor 29 is stopped, the filter control complement mode is set to ON, and the routine jumps to step 9b.

[Step 31 (S31)] The setting state of the filter effect setting means 222 is monitored, and if it is set to 1/4, the flow advances to step 32a shown in FIG. Otherwise, go to step 33.

[Step 32a (S32a)] The filter rotation angle between the storage position where the photometric output shows the minimum value and the storage position where the photometric output shows the maximum value in step 20 is divided into four equal parts. The effect of the polarizing filter shifted to the maximum value side is the second smallest (the filter effect is MAX-MIN
A control signal is transmitted from the control means 232 to the motor drive circuit 234 so as to set the polarization filter 23 at a position of (１ ／ image of), and the pulses of the filter rotation position detection means (photo interrupter) 217 from the initial position are counted.

[Step 32b (S32b)] It is determined whether or not the release button 228 of the camera is pressed to the second stroke and the second stroke switch SW-2 is turned on.
If it is ON, the process proceeds to step 32e. If the second stroke switch SW-2 is OFF, the process proceeds to step 32c.

[Step 32c (S32c)] If a desired position is obtained from the initial position of the filter rotation position detecting means (photo interrupter) 217, the process proceeds to step 32d. If the pulse count of the filter rotation position detection means (photo interrupter) 217 is not at the desired position, the process returns to step 32b.

[Step 32d (S32d)] The drive of the filter drive motor 29 is stopped, and then the flow proceeds to step 11.

[Step 32e (S32e)] Since the release button 228 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 29 is sent from the control means 232 to the motor drive circuit 234, the filter drive motor 29 is stopped, the filter control complement mode is set to ON, and the routine jumps to step 9b.

[Step 33 (S33)] The setting state of the filter effect setting means 222 is monitored, and if it is set to MIN, the flow advances to step 34a shown in FIG. Otherwise, go to step 35.

[Step 34a (S34a)] From the control means 232, the motor drive circuit 234 is set so that the polarization filter 23 is set to the storage position where the photometric output with the smallest effect of the polarization filter 23 in step 20 shows the maximum value. The control signal is transmitted, and the pulse of the filter rotational position detecting means (photo interrupter) 217 from the initial position is counted.

[Step 34b (S34b)] It is determined whether or not the release button 228 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned on.
If it is ON, the process proceeds to step 34e. If the second stroke switch SW-2 is off, the process proceeds to step 34c.

[Step 34c (S34c)] If the desired position of the pulse count of the filter rotation position detecting means (photo interrupter) 217 from the initial position is obtained, the flow advances to step 34d. If the pulse count of the filter rotation position detecting means (photo interrupter) 217 is not at the desired position, the process returns to step 34b.

[Step 34d (S34d)] The drive of the filter drive motor 29 is stopped, and then the flow proceeds to step 11.

[Step 34e (S34e)] Since the release button 228 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 29 is sent from the control means 232 to the motor drive circuit 234, the filter drive motor 29 is stopped, the filter control complement mode is set to ON, and the routine jumps to step 9b.

[Step 35 (S35)] It is determined that a problem such as poor contact of the filter effect setting means 222 has occurred.
The control signal is transmitted from the control means 232 to the motor drive circuit 234, and the drive of the filter drive motor 29 is stopped at the initial rotation position of the polarization filter 23 based on the pulse of the filter rotation position detection means (photo interrupter) 217. After that, the operation of the camera is prohibited.

[Step 36 (S36)] Step 40
If it is determined that the strobe light is emitted and the calculated distance measurement value obtained in step 9 is larger than a predetermined close distance C that enters the macro shooting area, it is determined that shooting is performed at a normal distance, and step S9 is performed. Proceed to 37. If not, it is regarded as close-up shooting (macro shooting), and step 4
Proceed to 1.

[Step 37 (S37)] It is determined whether the release button 28 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned on. If it is ON, the process proceeds to step 38. 2nd stroke switch SW
If -2 is OFF, the process returns to step 2.

[Step 38 (S38)] If the flow has passed through the flow of step 9, the process proceeds to step 9 and step 19
The flow of the photographing lens 2 based on the photographing lens driving amount based on the AF distance measurement calculation result of step 19
(Focus adjusting lens 2b) is driven to adjust the focus.

[Step 39 (S39)] If the flow has passed through the flow of step 8, step 8 is executed.
In this case, the aperture of the lens shutter 221 and the shutter speed are controlled based on the exposure control value determined in step 18, and a flash is emitted to perform exposure. Thereafter, the process proceeds to step S14.

[Step 40 (S40)] Step 21
After it is determined that the strobe light is emitted, step 19
If it is determined that the calculated distance measurement value obtained in is larger than the predetermined close distance C that enters the macro shooting area, it is determined that shooting is performed at a normal distance, and the process returns to step 4 to return to the polarizing filter 23.
Of the taking lens out of the optical path. Otherwise, it is regarded as close-range shooting (macro shooting), and the process proceeds to step S11.

[Step 41 (S41)] Control means 23
2 to the motor drive circuit 234 to the filter drive motor 29
Is sent to rotate the filter drive motor 29 in the forward direction.
Turns forward. In the state shown in FIG. 12 at the beginning after step 36, the power of the motor 29 is transmitted from the motor worm gear 210 to the first two-stage gear 211 in the counterclockwise direction.
Rotating the two-stage gear 212 clockwise causes the planetary gear 213 to revolve clockwise around the sun gear 212b.

Therefore, the planetary gear 213 meshed with the rack gear 25c is disengaged from the rack gear 25c, and
Engage with 15. At the same time, the filter supporting member 25 pulled by the tension coil spring 28 is
The right end 25e of 5a is moved to a position where it comes into contact with the stopper 27b, the polarizing filter 23 enters a predetermined position in the optical path of the taking lens, and the filter gear 24a meshes with the idler gear 215, resulting in the state of FIG. 12 (step 40).
If the state is as shown in FIG. 12 from the beginning after passing through, there is no operation from the state of FIG.

After that, the motor 29 continues to rotate forward and rotates the filter gear 24a counterclockwise.
The polarization filter 23 held by the filter holding frame 24 integral with the lens a is rotated counterclockwise around an axis substantially coincident with the optical axis of the taking lens 22. Then, the process proceeds to step 42a shown in FIG.

[Step 42a (S42a)] The position is substantially determined by the positional relationship of the built-in strobe of the camera, and the light emitted from the strobe is reflected by a close subject (a mainly flat subject such as a copy having a particularly smooth surface). Then, a control signal is transmitted from the control means 232 to the motor drive circuit 234 so as to set the polarization filter 23 to a pre-stored rotational position of the polarization filter 23 which can most effectively cut the light into the photographing lens, The pulse of the filter rotational position detecting means (photo interrupter) 217 from the initial position is counted.

[Step 42b (S42b)] It is determined whether the release button 228 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned on.
If it is ON, the process proceeds to step 42e. If the second stroke switch SW-2 is OFF, the process proceeds to step 42c.

[Step 42c (S42c)] If the desired position is obtained from the initial position of the filter rotation position detecting means (photo interrupter) 217, the process proceeds to step 42d. If the pulse count of the filter rotation position detection means (photo interrupter) 217 is not at the desired position, the process returns to step 42b.

[Step 42d (S42d)] The drive of the filter drive motor 29 is stopped, and then the flow proceeds to step 11.

[Step 42e (S42e)] Since the release button 228 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 29 is sent from the control means 232 to the motor drive circuit 234, the filter drive motor 29 is stopped, the filter control complement mode is set to ON, and the routine jumps to step 9b.

[Step 44 (S44)] The state of the main switch (not shown) is monitored. If it is ON, the process returns to step 2 and repeats thereafter. If OFF, step 45
Proceed to.

[Step 45 (S45)] The photographing lens barrel is retracted, and the power supply to the camera is cut off.

In the built-in filter electric drive camera, steps 4 (S4a to S4c) and 9 (S9b to S9)
g), 17 (S17a-17d), 26 (26a-26
e), 28 (28a to 28e), 30 (30a to 30)
e), 32 (32a to 32e), 34 (34a to 34)
e) and 42 (42a to 42e) by providing a general control means having a camera sequence, when filter control can overlap with at least one of focus control and exposure control in a time series manner, filter control is not performed. Although the image quality is reduced due to a decrease in the amount of exposure due to the completeness, the release time lag can be reduced while suppressing the image quality from being reduced by using the filter control complement function.

In the above-described embodiment, the filter complementing function is not limited to the strobe and the exposure correction. For example, an image blur correction mechanism may be used.

The above embodiment is not limited to a camera, but has the same effect in a lens and camera system having a similar configuration.

(Third Embodiment) A third embodiment will be described with reference to FIGS.

FIG. 20 is a main part configuration diagram of the lens shutter camera viewed from above. FIG. 21 is an external perspective view of the lens shutter camera. FIG. 22 is a perspective view of a main part, showing a state in which the filter has entered the optical path of the taking lens. FIG. 23 is a perspective view of a main part, showing a state where the filter is retracted outside the optical path of the taking lens. FIG. 24 is a block diagram showing components. 25 to 29 are operation flowcharts.

In these figures, reference numeral 31 denotes a camera body, and all the essential parts shown in FIGS. 22 and 23 are provided in the camera body 31. Reference numeral 32 denotes a photographing lens capable of close-up (macro) photographing, 33 denotes a polarizing filter, 34 denotes a filter holding frame that holds and fixes the polarizing filter 33, and an axis parallel to the optical axis of the photographing lens at the outer front side (subject side). A gear 34a (filter gear) which is rotatably supported by the filter support member 35 and receives rotational power on the rear side (film surface side) is provided.

An advancing / retreating guide portion 35a of the filter support member 35 is provided with an elongated hole 35b fitted with two flanged guide pins 36 implanted in a camera body (not shown). It is slidably interposed between the camera body (not shown) and the guide pin flange 36a slidably by the camera body (not shown) and is supported by the camera body (not shown) with a slight gap.

Reference numeral 35c denotes a rack gear provided at the upper end of the advance / retreat guide portion 35a of the filter support member 35, 35d denotes a spring hook provided at the lower end of the advance / retreat guide portion 35a of the filter support member 35, and 37a denotes a camera body (not shown). A spring hook 37b provided is a stopper provided on the camera body (not shown), as shown in FIG.
The rotation center of the polarizing filter and the optical axis of the photographing lens substantially coincide with each other when in contact with the right end 35e of the advancing / retreating guide portion 35a. Reference numeral 38 denotes a tension coil spring which is hung between both spring hooks 35d and 37a, and generates tension so that the stopper 35b abuts on the stopper 35e in the state shown in FIG.

Reference numeral 39 denotes a filter driving electromagnetic motor (fixed to a camera body (not shown); hereinafter, referred to as a filter driving motor); 310, a motor worm gear;
Is a first two-stage gear 31 composed of a bevel gear 311a and a small gear 311b in which a large gear meshes with the motor worm gear 310;
Reference numeral 2 denotes a second two-stage gear in which a large gear 312a meshes with a small gear 311b, and the small gear 312b becomes a sun gear and the planetary gear 31
Meshes with 3. Reference numeral 314 denotes a planet arm which holds the planet gear 313 so as to revolve around the sun gear 312b.

An idler gear 315 connects between the planet gear 313 and the filter gear 34a. Gears 311, 31
Reference numerals 2 and 315 are rotatably supported by a camera body (not shown). Further, the planetary gear 313 revolves clockwise or counterclockwise around the sun gear 312b by forward / reverse rotation of the filter drive motor 9, meshes with the idler gear 315 or the rack gear 35c, and rotates the polarizing filter 33 and the photographing lens. It moves in and out of the optical path. These 35
c, 38, 39, 310, 311, 312, 313, 3
14 constitutes a filter moving means.

A phase plate 316 is fixed to the rear end of the filter holding frame 34 (after the filter gear 34a) concentrically with the rotation axis of the polarizing filter and has a donut shape that does not block the polarizing filter section. The phase plate 316 is made of a thin film such as a lith film, and has a continuous pattern of light-transmitting portions and light-shielding portions. Reference numeral 316a (FIG. 23) denotes an initial position portion where the light transmitting portion is continuous during a rotation angle larger than the other portions, and is a filter rotation position detecting means provided directly above the taking lens optical axis with the phase plate 316 interposed therebetween. A certain photo interrupter 317 counts pulses generated when the polarization filter rotates, from the initial position, and determines the rotation position of the polarization filter.

Reference numeral 318 denotes a photometric lens; and 319, a photometric sensor (SPC) having a well-known backlight detection function capable of detecting the output of the center and outer periphery of the light receiving surface of the sensor separately.
C and integrated. Both the photometric lens 318 and the photometric sensor 319 are disposed immediately after the polarizing filter 33 (on the film surface side), and can measure light passing through the polarizing filter 33. The upper side of the lens 32a that has little effect on the photographing screen (a rectangular screen that is long in the horizontal direction and short in the vertical direction) is cut to secure a space for disposing the photometric sensor, and the photometric lens 318 and the photometric sensor 319 are not shown. The cylinder does not adversely affect the photographing light and the photometry.

Reference numeral 320 denotes a filter advance / retreat detection switch which is turned off when the polarizing filter enters the optical path of the photographic lens, and turned on when retracted outside the optical path. Reference numeral 321 denotes a programmable lens shutter which also serves as a stop and a shutter, and is arranged behind the polarizing filter 33 (on the film surface side) so as not to block the optical path to the photometric sensor.

Reference numeral 322 denotes a filter effect setting means provided on the upper surface of the camera exterior. The filter effect setting means is a rotary knob which allows the photographer to selectively set the effect of the polarizing filter 33. Evacuate “OF
When the "F" position or any other position is selected, the polarizing filter 33 enters the optical path of the photographing lens and is set at a "MAX" position where the polarizing filter has a maximum effect and a rotating position where the polarizing filter has a minimum effect. “MIN” position, “1/2” position set to a rotation position that is half of the maximum and minimum of the polarization filter effect, “1 /” position set to a rotation position that is a quarter of the maximum and minimum of the polarization filter effect There is provided a "4/4" position and a "3/4" position which is set at a rotational position that is three quarters of the maximum and minimum of the polarizing filter effect.

Reference numeral 123 denotes an index to be used when selecting each of the above positions, 324 denotes a finder objective window, 325 denotes an autofocus projection window, 326 denotes an autofocus light reception window, 327 denotes a flash emission window, 328 denotes a release button, and 329 denotes a release button. A film take-up spool 330 is a film, and 331 is a film cartridge.

Reference numeral 332 denotes control means (CPU) for controlling the entire camera, which functions as a calculation means for performing various calculations on the basis of photometric values obtained by photometry by rotating a polarization filter, and a specific filter rotation position and filter control. It also has a function as storage means for storing an incomplete mode or the like.

Reference numeral 333 denotes a distance measuring sensor such as a known active autofocus position detecting element (PSD) which receives reflected light from a subject of infrared light projected from a light emitting element (IRED or the like) not shown. Then, the subject distance is calculated from the light receiving position. All of the distance measurement calculation and focus adjustment control are performed by the control unit 332, and the focus adjustment is performed by moving the focus adjustment lens 32b by a lens drive motor (not shown). These form an automatic focusing device.

Reference numeral 334 denotes a motor drive circuit for driving the filter drive motor 39; 335, a strobe circuit for generating a high voltage for emitting strobe light; and 336, a strobe light emitting section.

In the present embodiment, reference numeral 340 denotes a re-exposure setting means provided on the upper surface of the camera exterior. The re-exposure setting means 340 is a push button which allows the photographer to selectively set the re-exposure function. A re-exposure function OFF position is provided.

Next, the operation of the above configuration will be described with reference to FIGS.
Will be described along the flowchart of FIG.

[Step 1 (S1)] When a main switch (not shown) is turned on, power is supplied to the camera, the photographing lens barrel is extended to a predetermined position, and the photographing preparation is in an initial state.

[Step 2 (S2)] The setting state of the filter effect setting means 322 is monitored. If the setting is OFF, the polarization filter 33 is set to be retracted out of the optical path of the photographing lens, and the flow advances to step S3. If it is not OFF, it is determined that the polarization filter 33 has been set to a predetermined state (any of MAX, 3/4, 1/2, 1/4, and MIN positions) in which the polarization filter 33 has entered the optical path of the photographing lens. Proceed to.

[Step 3 (S3)] The state of the filter advance / retreat detection switch 320 is monitored, and the polarization filter 33
Is checked to ensure that it has been retracted out of the optical path of the taking lens (the state shown in FIG. 23). If the switch 320 is ON, the retreat of the polarizing filter 33 is confirmed, and the process proceeds to step S7. If the switch 320 is OFF, the polarization filter 33
Is determined to have entered the optical path of the taking lens (the state shown in FIG. 22), and the process proceeds to step 4a.

[Step 4a (S4a)] Control means 33
2 to the motor drive circuit 334 to the filter drive motor 39
Command is sent to reverse the filter drive motor 39
Reverses. In the state of FIG. 22, the power of the motor 39 is rotated from the motor worm gear 310 by rotating the first two-stage gear 311 clockwise and the second two-stage gear 312 counterclockwise to rotate the planetary gear 313 around the sun gear 312b. Revolve clockwise.

Therefore, the planetary gear 313, which has been meshing with the idler gear 315, meshes with the rack gear 35c, and resists the tension of the tension coil spring 38 to the elongated hole 35b provided in the advance / retreat guide portion 35a. The filter support member 35 guided by 36 is rotated until the polarizing filter 33 is moved to a position (the state shown in FIG. 23) in which the polarizing filter 33 is completely retracted out of the optical path of the taking lens. Then, the process proceeds to step 4b shown in FIG.

[Step 4b (S4b)] It is determined whether the release button 328 of the camera is pressed to the second stroke and the second stroke switch SW-2 is turned on. ON
If so, proceed to step 4c. 2nd stroke switch
If SW-2 is OFF, proceed to step 5.

[Step 4c (S4c)] Since the release button 328 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON, the control means 332 sends the filter drive motor to the motor drive circuit 334. A command is sent to stop 39, the filter drive motor 39 stops, the filter control incomplete mode is turned on, and the routine jumps to step 8.

[Step 5 (S5)] The state of the filter advance / retreat detection switch 320 is monitored again, and it is checked whether the polarizing filter 33 has reliably retracted out of the optical path of the photographing lens (whether the state shown in FIG. 23). If the switch 320 is ON, the retreat of the polarizing filter 33 is confirmed, and the process proceeds to step S6. If the switch 320 is OFF, it is determined that the polarizing filter 33 has not retreated outside the optical path of the taking lens, and Step 4 is repeated.

[Step 6 (S6)] A command to stop the filter drive motor 39 is sent from the control means 332 to the motor drive circuit 334, and the filter drive motor 39 stops. Here, tension is applied to the filter support member 35 by the tension coil spring 38 so that the filter support member 35 always enters the photographing lens optical path.
3, the second speed gear 312, the first speed gear 311, and the motor worm gear 310 mesh with each other in the speed increasing direction so that the last speed increasing gear is a worm gear. , Are held in the state of FIG.

In consideration of the possibility that a large shock is applied to the camera and the gears may be disengaged from each other, the advance / retreat guide portion 35a of the filter support member 35 should be moved to the position shown in FIG.
A locking mechanism (not shown) may be provided so as to lock and hold in the state of 3 and release the lock by the forward rotation of the filter drive motor 39.

Next, the routine proceeds to step 7.

[Step 7 (S7)] It is determined whether the release button 328 of the camera has been pressed to the first stroke and the first stroke switch SW-1 has been turned on. If it is ON, go to step 8. 1st stroke switch SW-1
If is OFF, the process jumps to step 44.

[Step 8 (S8)] Control means 332
Captures a photometric output from a photometric sensor 319 integrated with a photometric IC, performs AE photometric calculation, and determines an exposure control value.

[Step 9 (S9)] Control means 332
Discloses a known active auto-focus mechanism, in which a light emitting element IRED (not shown) is turned on to project light to a subject, and infrared reflected light from the subject is measured by a distance measuring sensor (PSD).
In step 333, the output based on the position of the received light is fetched, AF distance calculation is performed, and the photographing lens drive amount for focusing is determined.

[Step 10 (S10)] If the strobe auto mode is selected by the strobe mode setting means (not shown), it is determined by the AE photometry calculation in step 8 that the subject has low brightness requiring strobe light emission. Sometimes
If the strobe mode setting means (not shown) selects the strobe forced light emission, it is determined that the strobe light will be emitted, and the process proceeds to step 36. If it is determined that the strobe does not emit light, the process proceeds to step S11.

[Step 11 (S11)] It is determined whether or not the release button 328 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned on. ON
If so, proceed to step 12. 2nd stroke switch
If SW-2 is OFF, the process returns to step 2.

[Step 12 (S12)] The photographing lens 32 (focus adjustment lens 32b) is driven based on the photographing lens drive amount based on the AF distance measurement calculation result in step 9 to adjust the focus.

[Step 13 (S13)] Based on the exposure control value determined in step 8, the aperture of the lens shutter 321 and the shutter speed are controlled to perform exposure.

[Step 14 (S14)] After the exposure is completed,
The photographing lens 32 driven for focus adjustment is returned to the initial position.

[Step 15a (S15a)] The film is wound up by one frame.
Move to step 15b shown in FIG.

[Step 15b (S15b)] It is determined whether the filter control incomplete mode is ON and the re-exposure setting means is in the re-exposure function ON position. If NO, the process proceeds to 15c, and if YES, the process proceeds to 15d.

[Step 15c (S15c)] The incomplete filter control mode is turned off, and the routine jumps to step 2.

[Step 15d (S15d)] Incomplete filter control is completed, and the filter control incomplete mode is turned off.

[Step 15f (S15f)] When the strobe auto mode is selected by the strobe mode setting means (not shown), it is determined by the AE photometry calculation in step 8 that the subject has low brightness requiring strobe light emission. When the flash mode is selected by the flash mode setting unit (not shown), it is determined that the flash unit fires.
Proceed to step 38. If it is determined that the strobe does not emit light, the process proceeds to step S12.

[Step 16 (S16)] After it is determined in step 2 that the filter effect setting means 322 is other than OFF, the release button 328 of the camera is pressed to the first stroke and the first stroke switch SW-1 is turned on. Is determined. If it is ON, the process proceeds to step 17a. First
Step 4 if the stroke switch SW-1 is OFF
Fly up to 4.

[Step 17a (S17a)] A command is sent from the control means 332 to the motor drive circuit 334 to rotate the filter drive motor 39 forward, and the filter drive motor 39 rotates forward. Then, step 17b shown in FIG.
(Indicated by “b” in FIG. 25).

[Step 17b (S17b)] It is determined whether or not the release button 328 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned ON.
If it is ON, the process proceeds to step 37d. If the second stroke switch SW-2 is OFF, the process proceeds to step 17c.

[Step 17c (S17c)] It is determined whether or not the polarization filter 33 has rotated a predetermined amount. When the rotation by the predetermined amount is completed, the process jumps to step 18. If the rotation by the predetermined amount is not completed, the process jumps to step 17a. Step 17a
Due to −17c, when the state is initially as shown in FIG. 23,
The power of the motor 39 is transmitted from the motor worm gear 310 to the first
The two-stage gear 311 is rotated counterclockwise, the second two-stage gear 312 is rotated clockwise, and the planetary gear 313 is rotated by the sun gear 312b.
Revolve clockwise around.

Therefore, the planetary gear 313 meshed with the rack gear 35c is disengaged, and the idler gear 3
Engage with 15. At the same time, the filter support member 35 pulled by the tension coil spring 38 is moved forward and backward by the guide portion 3.
The right end 35e of 5a is moved to a position where it comes into contact with the stopper 37b, the polarizing filter 33 enters a predetermined position in the optical path of the taking lens, and the filter gear 34a meshes with the idler gear 315 to be in the state of FIG. 2
In the case of state 2, there is no operation from the state of FIG.

Thereafter, the motor 39 continues to rotate forward, and rotates the filter gear 34a counterclockwise.
The polarizing filter 33 held by the filter holding frame 34 integral with the lens a is rotated by a predetermined amount counterclockwise around an axis substantially coincident with the optical axis of the taking lens 32.

[Step 17d (S17d)] Since the release button 328 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 39 is sent from the control means 332 to the motor drive circuit 334, the filter drive motor 39 stops, and the filter control incomplete mode is turned on.
And skip to step 8.

[Step 18 (S18)] Control means 33
2 captures the photometric output from the photometric sensor 319 that receives the subject light passing through the polarizing filter 33 while rotating the polarizing filter 33, and performs AE photometric calculation.

[Step 19 (S19)] Step 18
At the same time, the control means 332 controls a light emitting element IRED (not shown) constituting a known active auto focus mechanism.
Is turned on, light is projected on the object, the reflected light from the object is received by the distance measuring sensor (PSD) 333, and the output based on the position of the light is captured. Consideration and correction
An F-distance calculation is performed to determine a photographing lens driving amount for focusing.

[Step 20 (S20)] Step 1
At the same time as 8 and 19, the control means 332
The maximum value and the minimum value of the photometric output from the CPU are detected and calculated, and the photometric output is associated with the pulse count from the initial position of the filter rotation position detecting means (photo interrupter) 317, so that the photometric output is the maximum value and the minimum value. Are stored respectively when the polarization filter 33 is displayed.

[Step 21 (S21)] If the strobe mode setting means (not shown) selects strobe forced light emission, it is determined that the strobe light will be emitted, and the flow advances to step S40. If the strobe does not emit light, the flow advances to step S22.

[Step 22 (S22)] Step 18
AE photometric calculation by the photometric sensor (SPC) 319
If the photometric output difference between the center and the outer periphery of the light receiving surface of the sensor becomes larger than a predetermined value, it is determined that the backlight photography is less effective for the polarizing filter 33, and the process returns to step 4 to return to the photographing lens optical path of the polarizing filter 33. Perform the evacuation operation to the outside. If not, the process proceeds to step S23.

[Step 23 (S23)] Step 18
In the AE photometric calculation in step, when it is determined that the low-luminance subject photography in which the maximum photometric output value when the polarizing filter 33 enters is smaller than the predetermined value A, the shutter exposure time becomes longer and the camera shake becomes longer if the photographing is performed as it is. Since there is a possibility that the strobe light needs to be emitted, the process returns to step 4, and the retracting operation of the polarizing filter 33 out of the optical path of the photographing lens is performed. If it is not smaller than the predetermined value A, the process proceeds to step 24.

[Step 24 (S24)] Step 18
If the difference between the maximum value and the minimum value of the photometric output when entering the polarizing filter 33 is smaller than the predetermined value B, it is determined that the effect of the polarizing filter is small.
Then, the retracting operation of the polarizing filter 33 out of the optical path of the photographing lens is performed. If not smaller than the predetermined value B, step 2
Go to 5.

[Step 25 (S25)] The setting state of the filter effect setting means 322 is monitored, and if it is set to MAX, the flow advances to step 26a shown in FIG. Otherwise, go to step 27.

[Step 26a (S26a)] The control means 332 controls the motor drive circuit 334 to set the polarization filter 33 at the storage position where the photometric output with the greatest effect of the polarization filter in step 20 shows the minimum value. A signal is transmitted, and pulses of the filter rotation position detection means (photo interrupter) 317 from the initial position are counted.

[Step 26b (S26b)] It is determined whether the release button 328 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned ON.
If it is ON, the process proceeds to step 26e. If the second stroke switch SW-2 is OFF, the process proceeds to step 26c.

[Step 26c (S26c)] If the desired position is obtained from the initial position of the filter rotation position detecting means (photo interrupter) 317, the process proceeds to step 26d. When the pulse count of the filter rotation position detection means (photo interrupter) 317 is not at the desired position, the flow returns to 26b.

[Step 26d (S26d)] The drive of the filter drive motor 39 is stopped, and then the flow proceeds to step 11.

[Step 26e (S26e)] Since the release button 328 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 39 is sent from the control means 332 to the motor drive circuit 334, the filter drive motor 39 is stopped, and the filter control incomplete mode is set to O.
Set to N and skip to step 12.

[Step 27 (S27)] The setting state of the filter effect setting means 322 is monitored, and if it is set to 3/4, the flow advances to step 28a shown in FIG. Otherwise, go to step 29.

[Step 28a (S28a)] The filter rotation angle between the storage position at which the photometric output shows the minimum value and the storage position at which the photometric output shows the maximum value in step 20 is divided into four equal parts. The effect of the polarizing filter shifted to the minimum value side is the second largest (the filter effect is MAX-MIN
A control signal is transmitted from the control means 332 to the motor drive circuit 334 so as to set the polarization filter 33 at the position (3/4 image), and the pulses of the filter rotation position detection means (photo interrupter) 37 from the initial position are counted.

[Step 28b (S28b)] It is determined whether or not the release button 328 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned on.
If it is ON, the process proceeds to step 28e. If the second stroke switch SW-2 is OFF, the process proceeds to step 28c.

[Step 28c (S28c)] If the desired position is obtained from the initial position of the filter rotation position detecting means (photo interrupter) 317, the process proceeds to step 28d. When the pulse count of the filter rotation position detection means (photo interrupter) 317 is not at the desired position, the process returns to step 28b.

[Step 28d (S28d)] The drive of the filter drive motor 39 is stopped.

[Step 28e (S28e)] Since the release button 328 of the camera is pushed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 39 is sent from the control means 332 to the motor drive circuit 334, the filter drive motor 39 stops, and the filter control incomplete mode is turned on.
And jump to step 12.

[Step 29 (S29)] The setting state of the filter effect setting means 322 is monitored, and if it is set to 1/2, the flow advances to step 30a shown in FIG. Otherwise, go to step 31.

[Step 30a (S30a)] The filter rotation angle between the storage position at which the photometric output shows the minimum value in step 20 and the storage position at which the photometric output shows the maximum value is divided into four equal parts. A control signal is transmitted from the control means 332 to the motor drive circuit 334 to set the polarizing filter 33 at a position where the effect of the polarizing filter is intermediate (the filtering effect is a half image of MAX-MIN), and the filter is rotated from the initial position. Position detecting means (photo interrupter)
317 pulses are counted.

[Step 30b (S30b)] It is determined whether or not the release button 328 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned ON.
If it is ON, the process proceeds to step 30e. If the second stroke switch SW-2 is OFF, the process proceeds to step 30c.

[Step 30c (S30c)] If the pulse count of the filter rotational position detecting means (photo interrupter) 317 from the initial position has reached a desired position, the flow advances to step 30d. If the pulse count of the filter rotation position detecting means (photo interrupter) 317 is not at the desired position, the process returns to step 30b.

[Step 30d (S30d)] The drive of the filter drive motor 39 is stopped, and then the flow proceeds to step 11.

[Step 30e (S30e)] Since the release button 328 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 39 is sent from the control means 332 to the motor drive circuit 334, the filter drive motor 39 stops, and the filter control incomplete mode is turned on.
And jump to step 12.

[Step 31 (S31)] The setting state of the filter effect setting means 322 is monitored, and if it is set to 1/4, the flow advances to step 32a shown in FIG. Otherwise, go to step 33.

[Step 32a (S32a)] The filter rotation angle between the storage position at which the photometric output shows the minimum value in step 20 and the storage position at which the photometric output shows the maximum value is divided into four equal parts. The effect of the polarizing filter shifted to the maximum value side is the second smallest (the filter effect is MAX-MIN
The control signal is transmitted from the control means 332 to the motor drive circuit 334 so as to set the polarization filter 33 at the position of (１ ／ image of), and the pulses of the filter rotation position detection means (photo interrupter) 317 from the initial position are counted.

[Step 32b (S32b)] It is determined whether the release button 328 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned ON.
If it is ON, the process proceeds to step 32e. If the second stroke switch SW-2 is OFF, the process proceeds to step 32c.

[Step 32c (S32c)] If the desired position is obtained from the initial position of the filter rotation position detecting means (photo interrupter) 317, the process proceeds to step 32d. If the pulse count of the filter rotation position detecting means (photo interrupter) 317 is not at the desired position, the process returns to step 32b.

[Step 32d (S32d)] The drive of the filter drive motor 39 is stopped.

[Step 32e (S32e)] Since the release button 328 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 39 is sent from the control means 332 to the motor drive circuit 334, the filter drive motor 39 is stopped, and the filter control incomplete mode is set to O.
Set to N and skip to step 12.

[Step 33 (S33)] The setting state of the filter effect setting means 322 is monitored, and if it is set to MIN, the flow advances to step 34a shown in FIG. Otherwise, go to step 35.

[Step 34a (S34a)] The control means 332 sends a signal to the motor drive circuit 334 so that the polarization filter 33 is set at the storage position where the photometric output with the smallest effect of the polarization filter 33 at step 20 shows the maximum value. The control signal is transmitted, and the pulse of the filter rotation position detection means (photo interrupter) 317 from the initial position is counted.

[Step 34b (S34b)] It is determined whether the release button 328 of the camera is pressed to the second stroke and the second stroke switch SW-2 is turned on.
If it is ON, the process proceeds to step 34e. If the second stroke switch SW-2 is off, the process proceeds to step 34c.

[Step 34c (S34c)] If the desired position is obtained for the pulse count of the filter rotation position detecting means (photo interrupter) 317 from the initial position, the flow advances to step 34d. If the pulse count of the filter rotation position detection means (photo interrupter) 317 is not at the desired position, the flow returns to step 34b.

[Step 34d (S34d)] The drive of the filter drive motor 39 is stopped, and then the flow proceeds to step 11.

[Step 34e (S34e)] Since the release button 328 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON,
A command to stop the filter drive motor 39 is sent from the control means 332 to the motor drive circuit 334, the filter drive motor 39 stops, and the filter control incomplete mode is turned on.
And jump to step 12.

[Step 35 (S35)] It is determined that a problem such as poor contact of the filter effect setting means 322 has occurred.
A control signal is transmitted from the control means 332 to the motor drive circuit 334, and the drive of the filter drive motor 39 is stopped at the rotation initial position of the polarization filter 33 based on the pulse of the filter rotation position detection means (photo interrupter) 317. After that, the operation of the camera is prohibited.

[Step 36 (S36)] Step 40
If it is determined that the strobe light is emitted and the calculated distance measurement value obtained in step 9 is larger than a predetermined close distance C that enters the macro shooting area, it is determined that shooting is performed at a normal distance, and step S9 is performed. Proceed to 37. If not, it is regarded as close-up shooting (macro shooting), and step 4
Proceed to 1.

[Step 37 (S37)] It is determined whether the release button 28 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned on. If it is ON, the process proceeds to step 38. 2nd stroke switch SW
If -2 is OFF, the process returns to step 2.

[Step 38 (S38)] If the flow has passed through the flow of step 9, the process proceeds to step 9 and step 19
The flow of the photographing lens 2 based on the photographing lens driving amount based on the AF distance measurement calculation result of step 19
(Focus adjusting lens 2b) is driven to adjust the focus.

[Step 39 (S39)] If the flow has passed through the flow of step 8, the process proceeds to step 8 and step 18
, The aperture of the lens shutter 321 and the shutter speed are controlled based on the exposure control value determined in step 18, and the flash is emitted to perform exposure. Thereafter, the process proceeds to step S14.

[Step 40 (S40)] Step 21
After it is determined that the strobe light is emitted, step 19
When it is determined that the calculated distance measurement value obtained in step (1) is larger than the predetermined close distance C that enters the macro image capturing area, it is determined that the image is captured at a normal distance, and the process returns to step S4.
Of the taking lens out of the optical path. Otherwise, it is regarded as close-range shooting (macro shooting), and the process proceeds to step S11.

[Step 41 (S41)] Control means 33
2 to the motor drive circuit 334 to the filter drive motor 39
Is sent to rotate the filter drive motor 39 forward.
Turns forward. In the state shown in FIG. 23 at the beginning after step 36, the power of the motor 39 is transmitted from the motor worm gear 310 to the first two-stage gear 311 in the counterclockwise direction.
Rotating the two-stage gear 312 clockwise causes the planetary gear 313 to revolve clockwise around the sun gear 312b.

Therefore, the planetary gear 313 meshed with the rack gear 35c is disengaged, and the idler gear 3
Engage with 15. At the same time, the filter support member 35 pulled by the tension coil spring 38 is moved forward and backward by the guide portion 3.
The right end 35e of 5a is moved to a position where it comes into contact with the stopper 37b, the polarizing filter 33 enters a predetermined position in the optical path of the taking lens, and the filter gear 34a meshes with the idler gear 315 to be in the state of FIG. 22 (step 40).
If the state is as shown in FIG. 22 from the beginning after passing through, there is no operation from the state of FIG.

After that, the motor 39 continues to rotate forward and rotates the filter gear 34a counterclockwise.
The polarization filter 33 held by the filter holding frame 34 integral with the lens a is rotated counterclockwise around an axis substantially coincident with the optical axis of the photographing lens 32. Then, the process proceeds to step 42a shown in FIG.

[Step 42a (S42a)] The position is substantially determined by the positional relationship of the built-in strobe of the camera, and the light emitted from the strobe is reflected by a close subject (a mainly flat subject such as a copy having a particularly smooth surface). Then, a control signal is transmitted from the control means 332 to the motor drive circuit 334 so as to set the polarization filter 33 to a pre-stored rotation position of the polarization filter 33 which can most effectively prevent the light from entering the photographing lens, The pulse of the filter rotation position detection means (photo interrupter) 317 from the initial position is counted.

[Step 42b (S42b)] It is determined whether the release button 328 of the camera has been pressed to the second stroke and the second stroke switch SW-2 has been turned on.
If it is ON, the process proceeds to step 42e. If the second stroke switch SW-2 is OFF, the process proceeds to step 42c.

[Step 42c (S42c)] If the desired position has been obtained from the initial position of the filter rotation position detection means (photo interrupter) 317, the process proceeds to step 42d. If the pulse count of the filter rotation position detection means (photo interrupter) 317 is not at the desired position, the process returns to step 42b.

[Step 42d (S42d)] The drive of the filter drive motor 39 is stopped, and the flow advances to step 37.

[Step 42e (S42e)] Since the release button 328 of the camera is pressed to the second stroke and the second stroke switch SW-2 is determined to be ON, the control means 332 sends the filter drive motor to the motor drive circuit 334. A command is sent to stop 39, the filter drive motor 39 stops, the incomplete filter control mode is set to ON, and the routine jumps to step 38.

[Step 44 (S44)] The state of the main switch (not shown) is monitored. If it is ON, the process returns to step 2 and repeats thereafter. If OFF, step 45
Proceed to.

[Step 45 (S45)] The photographing lens barrel is retracted, and the power supply to the camera is cut off.

The above steps 4 (4b, 4c), 15
(15b-15d, 15f), 17 (17b-17
d), 26 (26a to 26e), 28 (28a to 28)
e), 30 (30a-30e), 32 (32a-32)
e), 34 (34a to 34e), 42 (42a to 42)
e) By providing the general control means having the camera sequence, when the control of the filter can be overlapped in time series with at least one of the focus control and the exposure control, the filter control is incomplete because the filter control is incomplete. By photographing in a state where the image quality is degraded due to a decrease in image quality, and then automatically exposing again after the end of the filter control, it is possible to automatically provide a photograph that prioritizes the shutter time lag and a photograph that prioritizes the image quality. .

Thus, when the filter is driven incompletely by the motorized camera with the built-in filter and the drive is incomplete,
The problem of the release time lag and the image quality can be mitigated, and the convenience for the user can be improved.

Note that the present invention is not limited to the camera described in the above embodiment, and has the same effect in a lens and camera system having the same configuration.

[0405]

As described above, according to the present invention, in a camera having a built-in polarizing filter, it is possible to secure the quick shooting performance during the filter operation and to improve the stability of the power supply without using a high-speed filter driving device. In addition, it is possible to realize a highly convenient system or mechanism with a built-in polarizing filter that is electrically driven.

According to the first aspect of the present invention, the driving of the filter and at least one of the focus control and the exposure control are controlled in a time-series manner so as to be able to be overlapped in time series, thereby improving the quick shooting during the filter operation. I'm trying.

According to the second aspect of the invention, when the driving of the filter overlaps with the focusing control and the exposure control, the control of the filter is interrupted to stabilize the power supply.

According to the third aspect of the invention, when the filter control overlaps with, for example, the focusing control or the exposure control, the control of the filter is interrupted. However, the control of the filter is resumed after the focusing or the exposure control. As a result, the quick shooting performance during the operation of the filter and the stabilization of the power supply are obtained, and the use of a controlled filter becomes possible.

According to the invention of claim 4, for example, during the control of the focusing control or the exposure control, the control of the filter is prohibited, so that the power supply can be stabilized.

According to the fifth aspect of the present invention, since the filter is controlled so as to be able to overlap with the control by the focus control means or the control by the exposure control means in a time-series manner, it is possible to obtain a quick shooting during the filter operation. it can.

According to the sixth aspect of the present invention, when a focus and an exposure operation are requested during the drive control of the filter optical system,
Since the drive control of the filter optical system is interrupted and the control by the focusing control unit and the exposure control unit is performed, the stability of the power supply can be improved.

According to the seventh aspect of the present invention, after the drive control of the filter optical system is interrupted and the control of the focusing control means and the exposure control means is completed, the control of the filter optical system is continued. Thus, the stability of the power supply can be improved.

According to the eighth aspect of the invention, for example, the control of the filter effect adjustment is prohibited during the control of the focusing control or the exposure control, so that the stability of the power supply can be improved.

[0414] According to the ninth aspect of the present invention, when the control of the filter control means overlaps with the exposure control in a time-series manner, it has a function of complementing the exposure operation.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of a camera according to a first embodiment of the present invention.

FIG. 2 is an external perspective view of the camera of FIG.

FIG. 3 is a perspective view of a main part of the camera of FIG. 1 in a state where a filter has entered the optical path of a taking lens.

FIG. 4 is a perspective view of a main part of the camera of FIG. 1 in a state where the filter is retracted outside the optical path of the taking lens.

FIG. 5 is a block diagram showing components of the camera shown in FIG. 1;

FIG. 6 is an operation flowchart of the camera of FIG. 1;

FIG. 7 is a flowchart showing a continuation of the flow of FIG. 6;

FIG. 8 is a flowchart showing details of the flow in FIGS. 6 and 7;

FIG. 9 is a flowchart showing details of the flows in FIGS. 6 and 7;

FIG. 10 is a sectional view showing a configuration of a camera according to a second embodiment of the present invention.

11 is an external perspective view of the camera shown in FIG.

12 is a perspective view of a main part of the camera of FIG. 10 in a state where a filter has entered the optical path of the taking lens.

13 is a perspective view of a main part of the camera shown in FIG. 10 in a state where the filter is retracted outside the optical path of the taking lens.

FIG. 14 is a block diagram showing components of the camera shown in FIG. 10;

FIG. 15 is an operation flowchart of the camera in FIG. 10;

FIG. 16 is a flowchart showing a continuation of the flow of FIG. 15;

FIG. 17 is a flowchart showing details of the flow in FIGS. 15 and 16;

FIG. 18 is a flowchart showing details of the flow in FIGS. 15 and 16;

FIG. 19 is a flowchart showing details of the flow in FIGS. 15 and 16;

FIG. 20 is a sectional view showing a configuration of a camera according to a third embodiment of the present invention.

21 is an external perspective view of the camera shown in FIG. 20.

FIG. 22 is a perspective view of a main part of the camera of FIG. 20 in a state where the filter has entered the optical path of the taking lens;

23 is a perspective view of a main part of the camera of FIG. 20 in a state where the filter is retracted outside the optical path of the taking lens.

FIG. 24 is a block diagram showing components of the camera shown in FIG. 20;

FIG. 25 is an operation flowchart of the camera in FIG. 20;

FIG. 26 is a flowchart showing a continuation of the flow of FIG. 25;

FIG. 27 is a flowchart showing details of the flow in FIGS.

FIG. 28 is a flowchart showing details of the flow in FIGS. 25 and 26;

FIG. 29 is a flowchart showing details of the flow in FIGS. 25 and 26;

FIG. 30 is a sectional view showing a configuration of a camera in a conventional example.

FIG. 31 is an external perspective view of the camera shown in FIG. 30;

32 is a perspective view of a main part of the camera of FIG. 30 in a state where the filter has entered the optical path of the taking lens.

FIG. 33 is a perspective view of a main part of the camera of FIG. 30 with the filter retracted outside the optical path of the taking lens;

FIG. 34 is a block diagram showing components of the camera in FIG. 30;

FIG. 35 is an operation flowchart of a camera in a conventional example.

FIG. 36 is a flowchart showing a continuation of the flow in FIG. 35;

[Description of Signs] 11 camera body 12 photographing lens 13 polarizing filter 14 filter holding frame 15 filter supporting member 19 filter electromagnetic motor 116 phase plate 117 photointerrupter 118 photometric lens 119 photometric sensor 120: Filter advance / retreat detection switch 122: Filter effect setting means 132: Control means (CPU) 134: Motor drive circuit

Claims (17)

[Claims] 1. A filter driving means for moving a filter optical system inside and outside a photographing optical path, a filter control means for controlling the filter driving means, a focus control means for controlling a focusing operation, and a control for an exposure operation. In a camera with a built-in filter having exposure control means, control of the filter control means and control of at least one of focus control by the focus control means or exposure control by the exposure control means can be overlapped in time series. A camera with a built-in filter, comprising a general control means for causing the camera to have a filter. 2. A filter driving means for moving a filter optical system inside and outside a photographing optical path, a filter control means for controlling the filter driving means, a focus control means for controlling a focusing operation, and a control for an exposure operation. In a camera with a built-in filter having an exposure control unit, the filter control unit interrupts the drive control of the filter optical system when at least one of a focusing operation and an exposure operation is requested during the drive control of the filter optical system. A camera with a built-in filter, wherein control of the focus control means or the exposure control means is started. 3. The camera with a built-in filter according to claim 2, wherein said filter control means continuously controls said filter optical system after control of said focus control means or exposure control means is completed. 4. A filter driving means for moving a filter optical system inside and outside a photographing optical path, a filter control means for controlling the filter driving means, a focus control means for controlling a focusing operation, and a control for an exposure operation. A camera with a built-in filter having exposure control means, comprising: a general control means for prohibiting the operation of the filter optical system during at least one of the focusing control and the exposure control. 5. A camera with a built-in filter having a filter optical system in a photographing optical path, comprising: a filter effect adjustment drive unit for adjusting an effect of the filter optical system; and a filter control unit for driving and controlling the filter effect adjustment drive unit. A focus control unit for controlling a focusing operation, an exposure control unit for performing an exposure operation, a control of the filter control unit, a control by the focus control unit or a control by the exposure control unit, and a time series. A camera with a built-in filter, comprising: general control means for performing control so as to be able to overlap. 6. A filter built-in camera having a filter optical system in a photographing optical path, a filter effect adjustment driving unit for adjusting an effect of the filter, a filter control unit for driving and controlling the filter effect adjustment driving unit, and a focusing operation. Focusing control means for controlling the, and exposure control means for performing an exposure operation, the filter control means at least focusing during the drive control of the filter optical system, if any of the exposure operation is required, A camera with a built-in filter, wherein drive control of the filter optical system is interrupted, and control is performed by the focusing control unit or the exposure control unit. 7. A camera with a built-in filter according to claim 6, wherein said filter control means continuously controls said filter optical system after control of said focus control means or exposure control means is completed. 8. A camera with a built-in filter having a filter optical system in a photographing optical path, a filter effect adjustment driving unit for adjusting an effect of the filter optical system, and a filter control unit for driving and controlling the filter effect adjustment drive unit. Focus control means for controlling a focus operation, exposure control means for performing an exposure operation, and general control means for inhibiting control of the filter control means during at least one of the focus control and the exposure control. A camera with a built-in filter. 9. A filter driving means for moving the filter optical system inside and outside the photographing optical path, a filter effect adjustment driving means for adjusting the effect of the filter optical system, and controlling the filter driving means and the filter effect adjustment driving means. Filter control means, an exposure control means for controlling the exposure operation, and a general control means for controlling the control of the filter control means and the exposure control so as to be able to overlap in time series, the general control means, A camera with a built-in filter, having a function of complementing an exposure operation when the control of the filter control means overlaps with the exposure control in a time-series manner. 10. The camera with a built-in filter according to claim 9, further comprising means for selecting operation or non-operation of a function that complements the exposure operation. 11. The camera with a built-in filter according to claim 9, further comprising means for selecting a function that complements the exposure operation. 12. The method according to claim 9, 10 or 11,
A camera with a built-in filter, wherein the function of complementing the exposure operation is a flash device. 13. The method according to claim 9, 10 or 11,
A camera with a built-in filter, wherein a function of complementing the exposure operation is an image blur correction device. 14. The method according to claim 9, 10 or 11,
A camera with a built-in filter, wherein the function of complementing the exposure operation is an exposure correction device. 15. The camera with a built-in filter according to claim 14, wherein an exposure correction amount for complementing the exposure operation is changed according to a state of the filter. 16. A filter driving means for moving a filter optical system inside and outside a photographing optical path, a filter effect adjustment driving means for adjusting an effect of the filter optical system, and controlling the filter driving means and the filter effect adjustment driving means. Filter control means, an exposure control means for controlling the exposure operation, and a general control means for controlling the control of the filter control means and the exposure control so as to be able to overlap in time series,
When the control of the filter control means overlaps with the exposure control in a time-series manner, the overall control means performs exposure overlapping with the filter control, and performs the exposure operation again after the end of the filter control. Camera with built-in filter. 17. A selector according to claim 16, further comprising a selector for selecting to perform the exposure operation again after the end of the filter control when the control of the filter controller overlaps the control of the exposure controller in a time-series manner. A camera with a built-in filter.