JP2001264610A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy-to-use camera incorporating a polarizing filter. SOLUTION: After completing focusing operation (S7), a filter optical system is moved into a photographing optical path and a filter is rotated so that an optimum filter effect is obtained (S8 and S9). After completing the insertion and the rotation of the filter (S10 and S11), exposing a film surface is started (S12). After completing the exposure (S13), the filter is retreated (S14) and the film is wound (S16).

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 attached to a female screw provided at the tip of the photographing lens. The male screw of the section is screwed and fixed. In some filters such as a polarizing filter, the filter portion is configured to be rotatable with respect to the mounting portion, and the photographer manually adjusts the filter portion such as the polarizing filter while taking a look through the viewfinder of the camera. The camera is rotated around an axis parallel to the optical axis, and the finder screen is visually checked so that a desired filter effect can be obtained.

In such a configuration, there is an inconvenience of attaching and detaching a filter. To solve this problem, Japanese Patent Application Laid-Open No. 8-334809 discloses that a built-in filter is inserted into and out of an optical path of a photographic lens. It is disclosed that this reciprocating operation is performed electrically as well as reciprocating.

In Japanese Patent Application Laid-Open No. Hei 5-34116,
It discloses that 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 continuously adjust the light amount of the interchangeable lens, particularly the mirror lens.

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 tip 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.

In Japanese Utility Model Laid-Open Publication No. 3-60323, a polarizing filter is provided on the front surface of both a photographing lens and a finder in a lens shutter camera so as to be synchronously rotatable, and a photographer manually rotates the polarizing filter on the photographing lens side. Then, the polarizing filter on the finder side is also rotated 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 an example of which is shown in FIGS.
Shown in 6 is a main part configuration diagram of the lens shutter camera as viewed from above, FIG. 7 is an external perspective view of the lens shutter camera,
8 is a perspective view of a main part showing a state in which the filter has entered the optical path of the photographing lens, FIG. 9 is a perspective view of a main part showing a state in which the filter has retracted outside the optical path of the photographing lens, and FIG. 11 and 12 are operation flowcharts.

In these figures, reference numeral 41 denotes a camera body, and the main parts of the configuration shown in FIGS. 8 and 9 are all provided in the camera body 41.

Reference numeral 42 denotes a photographing lens capable of close-up (macro) photographing; 43, a polarizing filter; 44, a filter holding frame which holds and fixes the polarizing filter 43; A gear 44a (hereinafter, referred to as a filter gear) that is rotatably supported by the filter support member 45 about a parallel axis 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. 8, the rotation center of the polarizing filter is in contact with the right end 45e of the advance / retreat guide 45a of the filter supporting 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 advance / retreat guide 45a 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 (hereinafter, referred to as a filter driving motor) fixed to a camera body (not shown); 410, a motor worm gear; 411, a bevel gear 4 whose large gear meshes with the motor worm gear 410.
1st two-stage gear 412 consisting of 11a and small gear 411b
Is a second two-stage gear, in which the large gear 412a meshes with the small gear 411b, and the small gear 412b becomes the sun gear and the planetary gear 4
Engage with 13.

A planet arm 414 holds the planet gear 413 so as to revolve around the sun gear 412b. 415
Is an idler gear, and the planetary gear 413 and the filter gear 44
and a. The gears 411, 412, 415 are rotatably supported by a camera body (not shown).

The planetary gear 413 revolves clockwise or counterclockwise around the sun gear 412b by the forward / reverse rotation of the filter drive motor 49, and the idler gear 4 rotates.
The engagement between the gear 15 and the rack gear 45c is switched,
The rotation of the polarizing filter 43 and the forward / backward movement into and out of the optical path of the taking lens are performed.

These members 45c, 48, 49, 41
Reference numerals 0, 411, 412, 413, and 414 constitute filter advancing / retreating means.

Reference numeral 416 denotes a phase plate which is fixed concentrically with the rotation axis of the polarizing filter behind the filter holding frame 44, ie, behind the filter gear 44a, and is formed in a donut shape which does not block the polarizing filter portion. 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.

As shown in FIG. 9, reference numeral 416a denotes an initial position portion where the light transmitting portion is continuous during a rotation angle larger than that of the other portions, and is 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 as the filter rotation position detection means, 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 separately detecting the output of the center and outer periphery of the light receiving surface of the sensor.
It is integrated with.

Both the photometric lens 418 and photometric sensor 419 are disposed immediately after the polarizing filter 43 (on the film surface side).
The light passing through the polarizing filter 43 can be measured.

The upper side of the lens 42a shown in FIG. 6 which is less affected by, for example, a rectangular screen which is long in the horizontal direction and short in the vertical direction as a photographing screen is cut to secure an arrangement space for the photometric sensor. The light-measuring sensor 418 and the light-measuring sensor 419 are configured so as not to adversely affect the photographing light and the light measurement by a light-shielding tube (not shown).

Reference numeral 420 denotes a filter advancing / retracting detection switch, which is turned off when the polarizing filter enters the optical path of the photographing lens and turned on when retracted out of the optical path. Reference numeral 421 denotes a programmable lens shutter that also serves 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 has a rotary knob which allows the photographer to selectively set the effect of the polarizing filter 43, and moves the polarizing filter 43 out of the optical path of the photographing lens. When the OFF position to be retracted or any other position is selected, the polarizing filter 43 enters the optical path of the taking lens, and the MAX position is set to the rotational position where the polarizing filter has the maximum effect, and the MIN is set to the rotational position where the polarizing filter has the minimum effect. Position, 1/2 position to set the rotation position to be half of the maximum and minimum of the polarization filter effect, 1/4 position to set the rotation position to be the quarter of the maximum and minimum of the polarization filter effect,
A 3/4 position is provided to set the rotation position to be three quarters of the maximum and minimum of the polarization filter effect.

In FIG. 7, 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 emitting window, 426 is an autofocus light receiving window, 427 is a strobe light emitting window, and 428 is a release light. Button. In FIG. 6, reference numeral 429 denotes a film take-up spool, 430 denotes a film, and 431 denotes a film cartridge.

In FIG. 10, 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 polarizing filter, and a specific filter rotation position. It also has a function as storage means for storing the information.

Reference numeral 433 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. All of the distance measurement calculation and focus adjustment control for this purpose are performed by the control means 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. 434 is a motor drive circuit for driving the filter drive motor 49, 435 is a strobe circuit for generating a high voltage for emitting strobe light, and 436 is a strobe light emitting unit.

Next, the operation of the above configuration will be described with reference to the flowcharts shown in FIGS. In addition,
11 in FIG. 11 are respectively connected to in 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 422 is monitored. If the setting 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 one of the MAX, 3/4, 1/2, 1/4, and MIN positions) that has entered the optical path of the photographing lens, and the process proceeds to step 16. move on.

[Step 3 (S3)] The state of the filter advance / retreat detection switch 420 is monitored, and as shown in FIG. 9, it is checked whether or not the polarizing filter 43 is surely retracted out of the optical path of the taking lens. . 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, as shown in FIG. 8, it is determined that the polarization filter 43 has entered the optical path of the photographing lens, and the process proceeds to step 4.

[Step 4 (S4)] Control means 432
Sends a command to the motor drive circuit 434 to reverse the filter drive motor 49, and the filter drive motor 49 rotates reversely. In the state shown in FIG. 8, the power of the motor 49 is obtained by rotating the first second-stage gear 411 in the clockwise direction and the second second-stage gear 412 counterclockwise from the motor worm gear 410 to rotate the planetary gear 413 around the sun gear 412b. And revolve counterclockwise. For this reason, the planetary gear 413 which has been meshing with the idler gear 415 is switched so as to mesh with the rack gear 45c, and resists the tension of the tension coil spring 48 so as to resist the tension of the tension coil spring 48.
b and the filter support member 45 guided by the guide pin 46
As shown in FIG. 9, the polarizing filter 43 is rotated until it moves to a position where the polarizing filter 43 completely retracts 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 or not the polarizing filter 43 has reliably retracted out of the optical path of the taking lens as shown in FIG. Switch 420 is O
If N, 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)] Control means 432
Sends a command to the motor drive circuit 434 to stop the filter drive motor 49, 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.
13, 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. , In the state shown in 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 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 normal rotation of the motor. 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 switch SW-1 has been turned on. If it is ON, go to step 8. If the first switch SW-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 flash auto mode is selected by the flash mode setting means (not shown), it is determined by the AE photometry calculation in step 8 that the subject has low brightness that requires flash 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 36. If it is determined that the strobe does not emit light, the process proceeds to step S11.

[Step 11 (S11)] The release button 428 of the camera is pressed to the second stroke and
It is determined whether the switch SW-2 is turned on. If it is ON, the process proceeds to step 12, and if the second switch SW-2 is OFF, the process returns to step 2.

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

[Step 13 (S13)] Step 8
Lens shutter 421 based on the exposure control value determined in
The aperture and shutter time 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. After the winding is completed, the process returns to step 42.

[Step 16 (S16)] Step 4
After it is determined in step 2 that the filter effect setting means 422 is other than OFF, it is determined whether the release button 428 of the camera has been pressed to the first stroke and the first switch SW-1 has been turned ON. If it is ON, the process proceeds to step S17. 1st switch SW
If -1 is OFF, the process jumps to step 44.

[Step 17 (S17)] Control means 4
32 to the motor drive circuit 434 to the filter drive motor 4
9 is sent to rotate the filter driving motor 4 in the forward direction.
9 rotates forward. At first, in the state shown in FIG. 9, the power of the motor 49 rotates the first two-stage gear 411 counterclockwise and the second two-stage gear 412 from the motor worm gear 410 in the clockwise direction. Revolve clockwise around sun gear 412b.

Therefore, the planetary gear 413 meshed with the rack gear 45c is disengaged from the rack gear 45c and is switched to mesh with the idler gear 415. Simultaneously with this switching, 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 contacts the stopper 47b, and the polarizing filter 43 moves to a predetermined position in the optical path of the photographing lens. When the filter gear 44a enters, the idler gear 4
15 and the state shown in FIG. Note that if the state is as shown in FIG. 8 from the beginning, there is no operation from the state shown in FIG.

After that, the motor 49 continues to rotate forward to rotate the filter gear 44a in the counterclockwise direction.
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 taking lens 42.

[Step 18 (S18)] Control means 4
Reference numeral 32 denotes a photometric sensor 419 that receives the subject light that has passed through the polarizing filter 43 while rotating the polarizing filter 43.
AE photometric calculation is performed by taking in the photometric output from.

[Step 19 (S19)] Step 1
At the same time, the control means 432 turns on a light emitting element IRED (not shown) constituting a known active autofocus mechanism, emits light to a subject, and reflects infrared reflected light from the subject by a distance measuring sensor (PSD) 433. The output based on the received light position is taken in, and the polarizing filter
In consideration of the change in the photographing optical path length corresponding to the insertion of No. 3, AF distance measurement calculation is performed with correction, and the photographing lens drive amount for focusing is determined.

[Step 20 (S20)] Step 1
At the same time as 8 and 19, the control means 432
Detects and calculates the maximum and minimum values of the photometric output from the CPU, and associates the photometric output with the pulse count from the initial position of the photointerrupter 417, which is the filter rotational position detecting means, so that the photometric output has 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 the strobe forcible light emission, it is determined that the strobe fires, and the process proceeds to step 40. If the strobe does not fire, the process proceeds to step 22. .

[Step 22 (S22)] Step 1
8, 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 1
In the AE photometric calculation in step 8, if it is determined that the low-luminance subject is to be photographed in which the maximum photometric output value when the polarizing filter 43 enters is smaller than the predetermined value A, the shutter exposure time becomes long and the camera shake occurs Therefore, since it is necessary to emit strobe light, the flow returns to step 4 to perform the retracting operation of the polarizing filter 43 out of the optical path of the photographing lens, and if not smaller than the predetermined value A, the flow proceeds to step 24.

[Step 24 (S24)] Step 1
By the AE photometric calculation in step 8, when the difference between the maximum value and the minimum value of the photometric output when the polarizing filter 43 enters is smaller than the predetermined value B, it is determined that the effect of the polarizing filter is small. The retracting operation to the outside of the optical path of the taking lens at 43 is performed, and 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 422 is monitored, and if it is set to MAX, the process proceeds to step 26; otherwise, the process proceeds to step 27.

[Step 26 (S26)] Step 2
A control signal is transmitted from the control means 432 to the motor drive circuit 434 so that the polarization filter 43 is set to the storage position where the photometric output at which the effect of the polarization filter at 0 has the largest value shows the minimum value. The pulse of the detection means (photo interrupter) 417 is counted,
When the desired position is obtained, the driving of the filter driving motor 49 is stopped, and then the process proceeds to step S11.

[Step 27 (S27)] The setting state of the filter effect setting means 422 is monitored, and if it is set to 進 み, the process proceeds to step 28; otherwise, the process proceeds to step 29.

[Step 28 (S28)] Step 2
The filter rotation angle between the storage position at which the photometric output at 0 shows the minimum value and the storage position at which the photometric output shows the maximum value is divided into four equal parts. Second largest (Filter effect is 3 / MAX of MAX-MIN)
The 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 (image 4), and the pulses of the filter rotation position detection means (photo interrupter) 17 from the initial position are counted. At this time, the driving of the filter driving motor 9 is stopped, and then the process proceeds to step S11.

[Step 29 (S29)] The setting state of the filter effect setting means 422 is monitored, and if it is set to へ, the process proceeds to step 30; otherwise, the process proceeds to step 31.

[Step 30 (S30)] Step 2
The filter rotation angle between the storage position where the photometric output at 0 shows the minimum value and the storage position at which the photometric output shows the maximum value is divided into four equal parts, and the effect of the polarizing filter is intermediate (the filter effect is 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 a position (1/2 image of MAX-MIN), and a filter rotation position detection means (photo interrupter) 417 from the initial position is set.
Are counted, and when the desired position is obtained, the driving of the filter driving motor 49 is stopped.
Proceed to 1.

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

[Step 32 (S32)] Step 2
The filter rotation angle between the storage position at which the photometric output at 0 shows the minimum value and the storage position at which the photometric output shows the maximum value is divided into four equal parts, and the effect of the polarizing filter closer to the maximum value side is obtained. Second smallest (filter effect is 1 / MAX of MAX-MIN)
The control signal is transmitted from the control means 432 to the motor drive circuit 434 to set the polarization filter 43 at the position (image 4), and the pulse of the filter rotation position detection means (photo interrupter) 417 from the initial position is counted. At this point, the driving of the filter driving motor 49 is stopped, and then the process proceeds to step S11.

[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;

[Step 34 (S34)] Step 2
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 at which the effect of the polarization filter 43 at 0 has the minimum value shows the maximum value, and the filter rotation from the initial position is performed. The pulse of the photo interrupter 417, which is a position detecting means, is counted, and when the desired position is obtained, the filter driving motor 49 is counted.
Is stopped, and then the process proceeds to step 11.

[Step 35 (S35)] The control unit 432 transmits a control signal from the control unit 432 to the motor drive circuit 434 assuming that a defect such as a contact failure of the filter effect setting unit 422 has occurred, and the photo-interrupter 417 serving as a filter rotational position detection unit The drive of the filter drive motor 49 is stopped at the rotation initial position of the polarization filter 43 from the pulse of
After that, the operation of the camera is prohibited.

[Step 36 (S36)] Step 1
After it is determined that the strobe fires from 0, step 9
When 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, the normal distance shooting is considered, and the process proceeds to step 37. Otherwise, the close distance shooting is performed. (Macro shooting), and the process proceeds to step 41.

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

[Step 38 (S38)] Step 9
If it has passed through the flow of step 1, step 9 and step 1
9, the photographing lens 2 is calculated based on the photographing lens driving amount based on the AF distance measurement calculation result in step 19.
(Focus adjusting lens 2b) is driven to adjust the focus.

[Step 39 (S39)] Step 8
If the flow comes through the flow of step 1, step 8 and step 1
If the flow has passed through the flow of step 8, the aperture of the lens shutter 421 and the shutter time are controlled based on the exposure control value determined in step 18, the flash is fired, and exposure is performed.
Thereafter, the process proceeds to step S14.

[Step 40 (S40)] Step 2
Step 1 after it is determined that the strobe fires from step 1.
If it is determined that the calculated distance measurement value obtained in step 9 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 4.
The evacuation operation of the photographing lens 3 out of the optical path is performed. Otherwise, it is regarded as close-range shooting (macro shooting), and the process proceeds to step 41.

[Step 41 (S41)] Control means 4
32 to the motor drive circuit 434 to the filter drive motor 4
9 is sent to rotate the filter driving motor 4 in the forward direction.
9 rotates forward. In the state shown in FIG. 9 at the beginning after step 36, the power of the motor 49 is transmitted from the motor worm gear 410 to the first second gear 411 in the counterclockwise direction.
By rotating the second two-stage gear 412 clockwise, the planetary gear 41 is rotated.
3 revolve clockwise around sun gear 412b.

Therefore, the planetary gear 413 meshed with the rack gear 45c is disengaged from the rack gear 45c and is switched to mesh with the idler gear 415. At the same time as this switching, the filter support member 45 pulled by the tension coil spring 48 is moved to the right end 45 of the advance / retreat guide portion 45a.
e is moved to a position where it contacts 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, resulting in the state shown in FIG.

Incidentally, from the beginning through step 40, FIG.
In the state shown in FIG. 9, there is no operation from the state shown in FIG.

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 42 (S 42)] The position of the built-in flash of the camera is substantially determined, and the light emitted from the flash is reflected by a close subject, that is, a mainly flat subject such as a copy having a particularly smooth surface. Then, a control signal is transmitted from the control means 432 to the motor drive circuit 434 so as to set the polarization filter 43 to a pre-stored rotational position of the polarization filter 43 which can most effectively prevent the light from entering the photographing lens, Photointerrupter 417 serving as filter rotation position detection means from an initial position
Are counted, and when the desired position is obtained, the driving of the filter driving motor 49 is stopped.
Proceed to 7.

[Step 44 (S44)] The state of the main switch (not shown) is monitored, and 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.

According to the camera system described above, 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 exhibit the effect of the filter. This eliminates the inconvenience of having to manually rotate the polarizing filter, etc., to the desired position while checking the filter effect of the polarizing filter, etc., through the viewfinder, and checking with the eye each time. become.

Also, when taking a picture in which a polarizing filter or the like becomes unnecessary, for example, when the subject has low brightness, when the polarizing filter effect such as backlight is small, or when the amount of light emitted by the polarizing filter is lost in a normal flash photography, etc. It is necessary for the photographer to judge by himself and remove the polarizing filter etc. by hand by loosening the screw by hand. Conversely, when photographing that needs the polarizing filter etc. suddenly, it is stored in the filter case. The polarizing filter and the like must be taken out and screwed into the photographing lens by hand, which is very troublesome, and therefore, the inconvenience that the quick shooting performance is inferior and a shutter chance is missed has been solved.

[0079]

However, in a camera having a built-in filter such as a polarizing filter as described above and capable of moving forward and backward by electric drive, the size of the filter becomes large due to its structure, making it unsuitable for a compact camera. Or, the camera sequence has not been established and the camera system has become difficult to handle, and it cannot be said that the camera is easy to use for ordinary camera users.

An object of the invention according to the present application is to provide a camera having a built-in filter such as a polarizing filter, which realizes a system or mechanism that is easy for anyone to use.

[0081]

According to a first aspect of the present invention, there is provided a filter optical system capable of moving between inside and outside of a photographic optical path, and the filter optical system is provided from the end of exposure of the photographic film to the start of feeding of the photographic film. And a filter driving means for retreating to outside of the photographing optical path.

According to a second aspect of the present invention, there is provided a filter optical system, a filter control means for controlling the filter optical system, a focus control means for controlling a focusing operation, and the filter control means and the focus control means. Operating means for starting a control operation by the same operation; and general control means for performing general control so that control starts of the filter control means and the focus control means operated by operation of the operation means do not overlap in time series. A camera comprising:

A third invention is the camera according to the second invention, wherein the general control means controls the filter optical system by the filter control means after the focus control means is operated. .

According to a fourth aspect of the present invention, in the second aspect, the general control means causes the filter control means to control the filter optical system prior to the operation of the focusing control means. And there is a camera.

According to a fifth aspect of the present invention, in the second, third or fourth aspect, the filter control means has a filter advance / retreat drive means capable of moving between inside and outside of the photographing optical path. The camera is characterized in that the advance / retreat drive of the filter optical system by the filter advance / retreat drive means and the operation of the focusing control means are not simultaneously controlled.

In a sixth aspect based on the second, third or fourth aspect, the filter control means includes a filter adjustment drive means for adjusting the effect of the filter, and the general control means comprises a filter adjustment drive means. The adjustment driving of the filter optical system by the means and the operation of the focusing control means are not simultaneously controlled.

According to a seventh aspect of the present invention, in the sixth aspect, a filter adjustment driving means for adjusting an effect of the filter optical system, and a filter advance / retreat driving means for enabling the filter optical system to move between inside and outside of a photographing optical path. Are constituted by independent driving means.

An eighth aspect of the present invention is the camera according to the seventh aspect, wherein the filter adjustment driving means is also used as a driving means of another element provided in the camera.

A ninth aspect of the present invention is the camera according to the seventh aspect, wherein the filter advance / retreat driving means is also used as a driving means for another element provided in the camera.

A tenth aspect of the present invention is the camera according to the eighth aspect, wherein the filter adjustment drive means is also used as a drive means for focusing drive operation provided in the camera.

An eleventh aspect of the present invention is the camera according to the ninth aspect, wherein the filter advance / retreat driving means is also used as a film feeding driving means provided in the camera.

The twelfth invention is provided in a photographing optical path,
A camera is characterized in that a filter optical system whose effect is variable by being driven and a filter driving means for driving the effect of the filter optical system are also used as driving means for other elements of the camera.

A thirteenth aspect of the present invention is the camera according to the twelfth aspect, wherein the filter driving means is also used as an AF driving means for controlling focusing of the camera.

According to a fourteenth aspect, in the camera according to the twelfth aspect, the filter driving means is also used as a zoom driving means for controlling a focal length of the camera.

In a fifteenth aspect based on the fifth or seventh aspect, the filter advance / retreat driving means is provided so as to be movable in a direction orthogonal to the photographing optical axis, and is movable in the photographing optical path by a spring force. A filter support member that rotatably supports the filter, and a filter support member driving mechanism that moves the filter support member out of the imaging optical path against the spring force. A camera is provided with a driving source for adjusting a filter effect by rotating a filter.

In a sixteenth aspect based on the ninth or eleventh aspect, the filter advance / retreat driving means is provided so as to be movable in a direction orthogonal to the imaging optical axis, and is movable in the imaging optical path by a spring force. A filter support member that rotatably supports the filter, and a filter support member drive mechanism that moves the filter support member out of the imaging optical path against the spring force. The filter support member drive mechanism includes: And a first switching means for switchably transmitting a driving force to the filter supporting member and another driven body.

A seventeenth invention is the sixteenth invention according to the sixteenth invention, wherein the movement of the filter supporting member allows the driving force of a driving source provided on the camera body side to be varied with the filter so that the filter and another driven member are driven. A camera having a second switching means for switchably transmitting a signal to a body. According to the above configuration, it is noted that comfortable shooting can be performed by determining the use timing of the filter in accordance with another sequence of the camera, and further, the operation sequence of the camera is optimized to use the filter. It is possible to use an actuator that does not have the same function as the filter control, and to compact the filter drive control mechanism.

[0098]

(First Embodiment) FIGS. 1 to 3
Indicates the first embodiment.

FIG. 1 is an electric block diagram of a camera incorporating a filter device. Reference numeral 11 denotes a camera microcomputer, and 12 denotes exposure control means. The exposure control means 12 includes a photometric means for measuring the luminance of the subject, a shutter and its driving means, and a shutter driving amount detecting means. The photometric unit measures the luminance of the subject and outputs a photometric value signal 12 a to the camera microcomputer 11.

When the camera microcomputer 11 generates a shutter drive signal 11a for starting exposure, the exposure control means 12
Opens the shutter and starts exposure to the film. or,
The opening amount of the shutter is detected by a shutter driving amount detection unit provided in the exposure control unit 12, and is output to the camera microcomputer 11 as a signal 12b.

The camera microcomputer 11 changes the signal 11a based on the brightness of the object, the sensitivity of the film, the brightness of the photographing optical system, and the signal 12a obtained by the exposure detecting means (not shown) to appropriately drive the shutter. Is controlling.

Reference numeral 13 denotes a filter control means, which is an insertion / retreat driving means 13a for inserting or retracting the filter into the photographing optical system, and rotating the filter in the photographing optical system or at a position retracted from the photographing optical system. It comprises a rotation driving means 13b for changing the photographing effect.

The camera microcomputer 11 outputs to the filter control means 13 a signal 11b for driving the filter to be inserted or retracted into the photographing system, and the filter control means 13 inserts the filter into the photographing optical system or the photographing optical system. Evacuate system.

At this time, a signal 13c of the insertion / retraction detecting means for detecting that the filter has been securely inserted into the photographing optical system or has been securely retracted from the photographing optical system is output to the camera microcomputer 11. In response, the camera microcomputer 11 controls the insertion / retreat driving means 13a.

The filter is rotated to change its effect. The camera microcomputer 11 outputs a signal 11c to the filter control means 13, and in response, the filter control means 13 rotates the filter. At this time, a signal 13d of the rotation detecting means for detecting the rotation angle of the filter is output to the camera microcomputer 11, and the camera microcomputer 1
1 controls the signal 11c to rotate the filter.

Reference numeral 14 denotes a feeding control means for winding and rewinding the film in accordance with a feeding signal 11d from the camera microcomputer. Also, a signal 14a from the feeding state detecting means for detecting the feeding state of the film is output to the camera microcomputer 11, and the camera microcomputer 11 controls the feeding signal 11d based on this signal to perform appropriate feeding. I do.

Reference numeral 15 denotes a zoom control means of the camera, which changes the focal length of the photographing optical system in accordance with a signal 11e from the camera microcomputer 11. Also, the zoom control means 15 has a zoom detection means for detecting the current zoom position,
The signal 15a from the zoom detecting means is output to the camera microcomputer 11.

The camera microcomputer 11 performs the optimal control of the zoom drive on the basis of the signal 15a.
a is also used for focusing on the subject.

Reference numeral 16 denotes a focus control means, which is a focus detection means for measuring the distance to the subject and detecting the focus state, a lens moving in the optical axis direction for focusing, a focus drive means for driving the lens, and a focus drive state. It is composed of a lens position detecting means for detecting.

The camera microcomputer 11 detects the distance from the camera to the subject and the focus state by the focus detection means, outputs a signal 11f to the focus control means based on the signal 16a, and drives the focus drive means for focusing. I do.

The signal 16b of the lens position detecting means is output to the camera microcomputer 11,
Changes the signal 11f based on the signal so that the optimum focus driving is performed.

Reference numeral 17 denotes a release means, which is a signal 17 of the first switch sw1 which is turned on when the release button is half-pressed.
a, and the second to be turned on by pressing and releasing the release button
The signal 17b of the switch sw2 is input to the camera microcomputer 11, and the camera microcomputer 11
Focus control and exposure control are performed based on 17b.

FIG. 2 is a flow chart for explaining the operation of the present embodiment. This flow starts when the main switch of the camera is turned on. When the main switch is turned off, this flow is the same at any step of this flow. To end.

In this flow, in order to simplify the explanation, operations not directly related to the present invention, for example, opening the barrier of the photographing lens barrel in conjunction with the main switch or moving the photographing lens barrel from the collapsed state The operation to be extended is omitted.

In this flow, the filters are used only when necessary at the time of photographing to make the components of the present embodiment easy to understand.

[Step 1 (S1)] This flow starts when the main switch of the camera is turned on. Then, the camera extends the shooting barrel from the collapsed state, and opens the lens barrier.

[Step 2 (S2)] Release means 1
The control waits until the release button 7 is half-pressed and the signal 17a of the first switch sw1 is generated.

[Step 3 (S3)] The exposure control means 12 of the camera measures the luminance of the subject and sends photometric information to the camera microcomputer 11. In this step, it is determined whether or not a filter should be used at the time of photographing based on the brightness state of the subject, and if necessary, the rotation angle of the filter for obtaining the optimum filter effect is obtained. Does not show a case where no filter is used in order to make the part of the invention easy to understand, and a method of obtaining an optimum filter effect is omitted.

[Step 4 (S4)] The focus control means 16 detects the subject distance or the focus state of the subject, and sends a signal 16a thereof to the camera microcomputer 11.

[Step 5 (S5)] Release means 1
When the release button 7 is depressed and the signal 17b is generated, the process proceeds to step S6, and otherwise, the process proceeds to step S22.

[Step 6 (S6)] The focus control means 16 receives the drive signal 11f from the camera microcomputer 11 and controls the focus drive means to drive and control the photographing optical system so that the subject is focused.

[Step 7 (S7)] In step S6, the process waits until the photographic optical system comes into focus. Then, when the photographing optical system is in focus on the subject, the process proceeds to the next step.

[Step 8 (S8)] The insertion / retraction driving means 13a of the filter control means 13 inserts a filter into the photographing optical system.

As described above, by inserting the filter after the focusing driving is completed, it is possible to prevent the driving of both devices from being restricted in the driving power supply state by the simultaneous driving of the two devices.

[Step 9 (S9)] Before the insertion of the filter is not completed, the rotation driving means 13b of the filter control means 13 is driven to start the rotation of the filter in the photographing optical system, and the rotation is driven to the optimum rotation angle. I do.

[Step 10 (S10)] Wait until the filter is securely inserted into the photographing optical system.

[Step 11 (S11)] Wait until the filter is driven to the optimum rotation angle.

[Step 12 (S12)] The camera microcomputer 11 outputs a signal 11a to the exposure control means 12 based on the subject luminance signal 12a and the signal 12b, controls the drive of the shutter, and performs exposure on the film surface.

[Step 13 (S13)] Wait until the exposure is completed, and close the shutter when the exposure is completed.

[Step 14 (S14)] The insertion / retreat driving means 13a of the filter control means retreats the filter from the photographing optical system.

[Step 15 (S15)] The process waits until the filter is completely retracted from the photographing optical system.

[Step 16 (S16)] The feed control means 14 winds up the exposed film.

As described above, since the film is wound after the driving of the filter is surely completed, the driving of both of them is limited by the power supply restriction due to the simultaneous driving of the driving of the filter and the film feeding. Can be prevented.

[Step 17 (S17)] Wait until film winding is completed.

[Step 18 (S18)] The release button of the release means 17 is released, and the first switch sw1 is released.
Wait until the output of the signal 17a of the
When the output of has disappeared, the process returns to step S2.

[Step 19 (S19)] Step S
When the release button is not half-pressed in step S2, the process proceeds to step S19, in which it is determined whether or not the photographer has performed a zoom operation. When the user has not performed the zoom operation, the process returns to step S2. Proceed to.

[Step 20 (S20)] The camera microcomputer 11 outputs a signal 11e to the zoom control means 15 based on the input zoom operation signal and zoom drive signal 15a to perform zoom drive control.

[Step 21 (S21)] It waits until the zoom drive is completed, and returns to step S2 when the zoom drive is completed.

[Step 22 (S22)] Step S
In step 5, when the release button of the release means 17 is not fully pressed (when the signal 17b is not output),
Proceeding to step S22, it is detected whether or not the signal 17a of the first switch sw1, which is a half-press of the release button, has stopped outputting. For example, it is determined whether or not the operation of the release button is lost. When the output of the signal 17a is continued, the process returns to the step S5 (because there is still a possibility that the release button is pressed and released in this case),
When the output of has disappeared, the process returns to step S2.

As described above, the filter is inserted into the photographing optical system and rotated to the optimum angle until the focusing drive of the photographing lens is completed and the film winding operation is started. Since the camera is configured to be further retracted, it is possible to effectively use the power supply in the camera without performing simultaneous driving of each element of the camera, and to realize a comfortable operation.

In the above flow, when the filter is inserted into the photographing optical system, the filter is simultaneously rotated.

FIG. 3 illustrates the mechanism, in which a filter drive member 45 is provided integrally with a rotation drive motor 18 dedicated to filter rotation.

The rotary drive motor 18 is connected to the filter support member 4.
5, the gear 18a is always meshed with the gear 44a, so that the filter can be rotationally driven even when the filter is being inserted into the photographing optical system.

As a result, the driving for inserting the filter and the driving for rotating the filter can be simultaneously performed, thereby realizing a camera having a rapid shooting performance.

As described above, there is provided a filter driving means for retracting the filter optical system which can move inside and outside the photographing optical path to outside the photographing optical path from the end of exposure to the photographing film to the start of feeding of the photographing film.

Filter control means for controlling the filter optical system, focusing control means for controlling the focusing operation, operating means for starting the filtering operation and the focusing operation by the same operation, control of the filter and control of the focusing Camera microcomputer 1 which is a general control means for controlling so as not to overlap in time series
1, the filter control means controls the filter optical system after the operation of the focus control means.

More specifically, the filter control means has a filter advance / retreat drive means (insertion / retreat drive means) for moving the filter forward and backward in the photographing optical path, and the general control means comprises a filter advance / retreat drive means for driving the filter optical system by the filter advance / retreat drive means. And that the operation of the focus control means is not controlled simultaneously.

Further, the filter control means has a filter adjustment drive means (rotation drive means) for improving the effect of the filter, and the general control means is capable of adjusting and controlling the filter optical system by the filter adjustment drive means. The operation of the focus control means is not controlled simultaneously.

Further, a filter adjusting drive means (rotation drive means) for changing the effect of the filter optical system and a filter advance / retreat drive means (insertion / retreat drive means) for moving the filter optical system forward / backward in the photographing optical path are independent drive means. Make up.

With the above configuration, each camera element can be comfortably driven and controlled by a single power supply in the camera, and a camera with a built-in filter which is easy to handle and excellent in quick shooting can be realized.

(Second Embodiment) FIG. 4 shows a second embodiment.

FIG. 4 shows a flow chart of the present embodiment. In the first embodiment shown in FIG. 2, the filter is inserted and rotated after the focusing is completed. The focusing operation is performed after the insertion / rotation of the lens is completed.

In FIG. 4, when the release button is depressed in step S5, the filter is inserted in step S8, the filter is rotated in step S9, and the filter is securely inserted into the photographing optical system in step S10. Then, in step S11, the process waits until the rotation of the filter to the optimum rotation angle is completed.

Then, after that, the focusing drive of the lens is started in step S6, the process waits until the focusing is completed in step S7, and the exposure is started in step S12.

When the filter is driven before focusing as described above,
Even if the vibration caused by driving the filter affects the focusing lens,
Since the focus driving after the filter operation is performed, there is an advantage that the influence is eliminated.

As described above, the filter control means for controlling the filter optical system and the focus control means for controlling the focusing operation are provided with the operating means for starting the filtering operation and the focusing operation by the same operation. By using a configuration in which the filter optical system is controlled prior to the operation of the focusing control unit, a camera with a built-in filter that is inexpensive can be realized.

(Third Embodiment) FIG. 5 shows a third embodiment.

FIG. 5A is a perspective view of a filter driving mechanism, and FIG. 5B is a front view of the same. In this embodiment, AF driving means and feeding means in the camera are independent of the filter. The configuration is such that the filter is driven by also using the camera element.

In FIG. 5, the planetary gear 413 is engaged with the film winding gear 31. In this state, the filter driving motor 49 and the planetary gear 413 are connected to the gear 3
When the gear 31 is rotated in the direction in which it meshes with the shaft 1, the shaft 31a of the gear 31
The film is wound up through the. At this time,
Since the planetary gear 413 rotates clockwise and moves the filter support member 45 all the way to the left in the figure, the rack gear 45c is disengaged from the planetary gear 413 and slips. Only idles on the rack gear 45c, and the filter holding member 45 does not change from the state shown in FIG.

When the filter driving motor 49 rotates in the reverse direction, the planetary gear 413 is switched so as to mesh with the gear 31 and disengage from the rack gear 45c to mesh with the gear 32.

The gear 32 is connected to the film rewinding shaft 32a. If the filter driving motor 49 is continuously driven in this direction, the film is rewound.

The filter driving motor 49
When is rotated in the reverse direction, the planetary gear 413 is disengaged from the rack gear 49 as described above, and the polarizing filter 43 enters the lens optical path by the force of the tension coil spring 48.

The gear 33 is connected to an AF drive shaft 33a through the AF drive shaft 33a.
It is connected to a drive motor (not shown) and transmits a driving force for AF driving.

The gear 33 meshes with a gear 34 via a gear 35, and the gear 34 drives a lens for focusing via a drive transmission shaft 34a.

The arm member 3 is attached to the filter support member 45.
5b is rotatably mounted via a shaft 35c, and a gear 35 is rotatably mounted via a shaft 35b at the tip of the arm member 35b. Further, since the tension coil spring 36 is provided between the pin 35d on the arm 35b and the pin 45f on the filter support member 45, the arm 35b is rotationally biased counterclockwise in FIG. I have.

Therefore, as long as the polarizing filter 43 does not enter the optical path of the taking lens, the gear 33 meshes with the gear 34 via the gear 35 and can transmit the AF driving force to the lens.

When the polarizing filter 43 enters the optical path of the photographing lens, the gear 33 meshes with the filter gear 44a as shown in FIG.
The polarizing filter 43 is rotated by the driving force of.

At this time, the filter supporting member 45 is
5b, the arm 35b is rotated by the spring force of the spring 36 so as to mesh with the gear 33. The filter support member 45 is provided with a stopper pin 45g that regulates the rotation of the arm 35b that rotates counterclockwise. The filter support member 45 moves to the right in the drawing, and the arm 35b is attached to the stopper pin 45g. Upon contact, the gear 35 cannot rotate further in the counterclockwise direction, and moves in the right direction in the figure together with the filter support member 45, disengaging from the gear 33, and the driving force of the gear 33 is applied to the gear 34. As a result, the driving force of the gear 33 is used only for driving the polarizing filter 43.

In the above configuration, for example, a case where no polarizing filter is used is considered. At first, the polarizing filter 43 is in the position shown in FIG. Therefore, when photographing is performed as it is, the AF driving force of the gear 33 is transmitted to the gear 34 to drive the lens to focus.

After that, when the photographing is completed, the filter driving electromagnetic motor 49 starts driving in the film winding direction.

At this time, as described above, the rack gear 45c slides with the planetary gear 413, and the state of the polarizing filter in FIG. 5 does not change.

When the filter is used, the AF driving force of the gear 33 is transmitted to the gear 34, and after the lens is focused, the filter driving electromagnetic motor 49 is slightly driven in the film rewinding direction.

This driving amount is such that the planetary gear 413 is disengaged from the gear 31 and the rack gear 45c, and is not enough to engage with the gear 32 and start the film rewinding yet.

Then, the polarizing filter 43 enters into the photographing lens by the tension coil spring 48, and FIG.
The state shown in is shown.

Then, the gear 33 meshes with the filter gear 44a and disengages with the gear 34, so that the driving force of the AF motor from the gear 33 causes the polarization filter 4a to rotate.
Only the rotation drive of No. 3 is performed.

When the exposure of the film is completed, the filter driving electromagnetic motor 49 is rotated in the film winding direction, and the planetary gear 413 rotating clockwise in FIG. , The filter supporting member 4
5, the polarizing filter 43 is retracted from the optical path of the taking lens, and the film is wound up.

When all the frames have been taken out of the film or when film rewinding is performed by the photographer's instruction to rewind the film, the filter driving electromagnetic motor 49 is rotated in the film rewinding direction.

Then, the planetary gear 413 is engaged with the gear 32, and the film 49 is rewound by continuing to rotate the motor 49. At this time, the polarizing filter 43 enters the photographing optical path by the force of the tension spring, but there is no problem because the photographing is not being performed.

Then, the polarizing filter 43 is retracted from the photographing optical path again by the film winding sequence when the film is loaded on the camera.

In the present embodiment, the rotation of the polarizing filter 43 uses the AF driving force. However, the present invention is not limited to this. For example, a motor for zoom driving may be used to drive the gear 33. In this case, too, there is no problem because the sequence for performing exposure using a filter and the sequence for driving zoom are time-shifted.

As described above, the filter adjustment drive means for changing the effect of the filter optical system and the filter advance / retreat drive means for moving the filter optical system forward / backward in the photographing optical path are constituted by independent drive means, respectively. The driving means for the focus driving operation provided in the camera is also used, and the driving means for moving the filter forward and backward is also used as the driving means for driving the film feeding provided in the camera.

Also, the filter device can be reduced in size by using the filter driving means for driving the filter optical system having a variable effect by being provided and driven in the photographing optical path, also as the zoom driving means for controlling the focal length of the camera. This makes it possible to provide a camera with a built-in filter that is easy to handle.

[0183]

As described above, according to the present invention, a compact camera with a built-in filter that can be easily handled by a general camera user can be realized.

Focusing on the fact that the use timing of the filter is determined in accordance with another sequence of the camera, comfortable photographing becomes possible, and further, by optimizing the operation sequence of the camera, an actuator which is not used can be used. Can also be used for filter control, so that the filter drive control mechanism can be made compact.

[Brief description of the drawings]

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

FIG. 2 is a flowchart for explaining the operation of the camera according to the first embodiment of the present invention;

FIG. 3 is a perspective view showing a structure of a filter rotation mechanism according to the first embodiment of the present invention.

FIG. 4 is a flowchart for explaining the operation of the camera according to the second embodiment of the present invention;

5A and 5B show a third embodiment of the present invention, wherein FIG. 5A is a perspective view showing a structure of a filter rotation mechanism, and FIG. 5B is a front view showing a structure of the filter rotation mechanism.

FIG. 6 is a main part configuration diagram of a conventional lens shutter camera viewed from above.

FIG. 7 is an external perspective view of a lens shutter camera in a conventional example.

FIG. 8 is a perspective view of a main part showing a state in which a filter of a lens shutter camera in a conventional example has entered the optical path of a taking lens.

FIG. 9 is an essential part perspective view showing a state in which a filter of a lens shutter camera in a conventional example is retracted outside the optical path of a taking lens.

FIG. 10 is a block diagram showing a main part configuration of a lens shutter camera in a conventional example.

FIG. 11 is a flowchart for explaining the operation of a conventional lens shutter camera.

FIG. 12 is a flowchart integrated with FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Camera microcomputer 12 ... Exposure control means 13 ... Filter control means 14 ... Feed control means 15 ... Zoom control means 16 ... Focus control means 17 ... Release means

Claims (17)

[Claims] 1. A filter optical system capable of moving between inside and outside of a photographing optical path, and retracting the filter optical system out of the photographing optical path between the end of exposure to the photographing film and the start of feeding of the photographing film. A camera comprising filter driving means. 2. A filter optical system, filter control means for controlling the filter optical system, focus control means for controlling a focusing operation, and control of the filter control means and the focus control means by the same operation. Operating means for starting operation; and general control means for performing general control so that control starts of the filter control means and the focus control means operated by operation of the operation means do not overlap in time series. And the camera. 3. The camera according to claim 2, wherein the general control unit controls the filter optical system by the filter control unit after the focus control unit operates. 4. The system according to claim 2, wherein the overall control unit controls the filter optical system by the filter control unit prior to the operation of the focus control unit.
The described camera. 5. The filter control means includes a filter advance / retreat drive means capable of moving between inside and outside of a photographing optical path, and the general control means controls advance / retreat drive of a filter optical system by the filter advance / retreat drive means and focusing control. 5. A camera according to claim 2, wherein the operation of the means is not controlled simultaneously. 6. The filter control means includes a filter adjustment drive means for adjusting an effect of a filter, and the general control means includes an adjustment drive of a filter optical system by the filter adjustment drive means and a control of the focus control means. 6. The camera according to claim 2, 3, 4 or 5, wherein the operation is not controlled at the same time. 7. A filter adjusting drive unit for adjusting the effect of the filter optical system and a filter advance / retreat drive unit for enabling the filter optical system to move between inside and outside of a photographing optical path, each comprising independent drive units. The camera according to claim 6, wherein: 8. The camera according to claim 7, wherein the filter adjustment driving unit is also used as a driving unit of another element provided in the camera. 9. The camera according to claim 7, wherein said filter advance / retreat drive means is also used as drive means for another element provided in the camera. 10. The camera according to claim 8, wherein the filter adjustment drive unit also serves as a focus drive operation unit provided in the camera. 11. The camera according to claim 9, wherein the filter advance / retreat drive unit also serves as a film feed drive drive unit provided in the camera. 12. A filter optical system which is provided in a photographing optical path and has a variable effect when driven, and a filter driving means for driving the filter optical system with variable effects is a driving means for driving other elements of the camera. A camera that is also used as a camera. 13. The camera according to claim 12, wherein said filter driving means is also used as AF driving means for controlling focusing of the camera. 14. The camera according to claim 12, wherein said filter driving means is also used as a zoom driving means for controlling a focal length of the camera. 15. A filter support member provided movably in a direction orthogonal to a photographing optical axis, said filter advance / retreat driving means rotatably supporting said filter movable in a photographing optical path by a spring force. A filter support member driving mechanism for moving the filter support member out of the imaging optical path against the spring force, wherein the filter support member has a drive for rotating the filter to adjust a filter effect. 8. The camera according to claim 5, further comprising a source. 16. A filter support member provided movably in a direction orthogonal to a photographing optical axis, said filter advance / retreat driving means rotatably supporting said filter movable in a photographing optical path by a spring force. A filter supporting member driving mechanism for moving the filter supporting member out of the imaging optical path against the spring force, wherein the filter supporting member driving mechanism transmits a driving force to the filter supporting member and another driven body. The camera according to claim 9, further comprising a first switching unit configured to switchably transmit to the camera. 17. The movement of the filter supporting member,
17. The image forming apparatus according to claim 16, further comprising: second switching means for switchably transmitting a driving force of a driving source provided on the camera body side to the filter and another driven body for changing a filter effect. The camera according to.