JPH07225412A - Camera capable of compensating parallax - Google Patents

Abstract

PURPOSE:To provide a camera capable of compensating parallax caused between a photographing lens, a finder optical system and an object distance measuring means (AF system). CONSTITUTION:The camera capable of compensating the parallax caused between the photographing lens and the finder optical system has a finder unit 13 having at least the finder optical system and the object distance measuring means, a driving means constituted of a cam 16, a gear train 17, a motor 21, a photointerrupter 23 or the like so as to drive the finder unit 13 at a specified position for compensating the parallax and a control means which consists of a CPU or the like controlling the driving means based on the output of the object distance measuring means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera capable of parallax correction, and more particularly to a camera using a finder device capable of confirming a focused state, capable of correcting parallax occurring during close-up photography. Is.

[0002]

2. Description of the Related Art In a camera having a viewfinder optical system in addition to a taking lens, for example, a lens shutter type camera, the taking lens field of view and the viewfinder optical system are generally caused by the difference in the optical axis positions of the taking lens and the viewfinder optical system. Since deviation of the system field of view, that is, parallax occurs, it is necessary to correct the parallax when actually taking a picture. Therefore, various cameras capable of parallax correction have been proposed and put to practical use.

For example, the camera disclosed in Japanese Patent Application Laid-Open No. 2-51134, by interlocking with the focusing operation of the taking lens, tilts the optical axis of the taking lens with respect to the optical axis of the finder optical system. Parallax correction is performed.

Further, the camera disclosed in Japanese Unexamined Patent Publication No. 2-71230 discloses that the optical axis of the finder optical system is tilted with respect to the optical axis of the taking lens in association with the focusing operation of the taking lens. Parallax correction is performed.

[0005]

However, according to the means disclosed in the above-mentioned Japanese Patent Laid-Open No. 2-51134,
Since the parallax correction is performed by moving the optical axis of the taking lens to the optical axis side of the finder optical system, there is a drawback that the camera for moving the taking lens becomes large in size.

According to the means disclosed in JP-A-2-71230, the optical axis of the finder optical system is tilted toward the optical axis of the taking lens, so that the finder optical system is provided between the taking lens and the taking lens. It is possible to correct the parallax that occurs, but the object distance measuring means (auto focus (AF) system (IRE
There is a problem that the parallax that occurs between D)) and the viewfinder optical system cannot be resolved, and between the composition when looking through the viewfinder and the composition that is printed on the film when the shutter is actually pressed. In addition, there is a problem that a temporal parallax occurs.

An object of the present invention is to solve the above-mentioned conventional problems and correct parallax generated between the taking lens, the finder optical system and the object distance measuring means (autofocus (AF) system). Furthermore, it is to provide a parallax-correctable camera that has already been parallax-corrected when the user of the camera looks into the viewfinder.

[0008]

A parallax-correctable camera according to the present invention is a parallax-correctable camera that corrects parallax between a taking lens and a finder optical system, and at least a finder optical system and a subject distance measuring means. And a drive means for driving the finder unit to a predetermined position for correcting parallax, and a control means for controlling the drive means based on the output of the subject distance measuring means. The drive means is a rotation drive means for rotationally driving the finder unit, and the finder unit rotates about a predetermined rotation axis provided in the camera body having the taking lens. It is characterized by doing.

An optical system for moving at least a part of the viewfinder optical system, which has a viewfinder optical system and is rotatable about a rotary shaft provided in the camera body. Based on the output of the system moving means, the projection provided on a part of the finder optical system, the rotating means for rotating the finder unit in cooperation with the projection, and the output of the subject distance measuring means. Control means for controlling the movement amount of the optical system moving means, and by the movement of the optical system moving means,
The image forming position of the finder optical system is defined, and the finder unit is rotated about the protrusion to correct the parallax of the taking lens and the finder optical system. A photographing lens moving means for moving the photographing lens, and the photographing lens moving means is moved to a position based on the output of the subject distance measuring means by a part of the driving means for driving the optical system moving means. It is characterized by

[0010]

The entire finder unit having the finder optical system and the object distance measuring means is controlled by the control means based on the output of the object distance measuring means and the like, and the photographing lens, the finder optical system and the object distance are controlled. It is rotationally driven to a predetermined position for correcting parallax generated between the measuring means and the measuring means.

[0011]

The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a configuration diagram showing a real image type finder optical system of a finder device applied to a camera of the present invention.

As shown in FIG. 1, an objective lens system composed of two positive and negative (concave and convex) objective lenses 1 and 2, and a first prism 3 and a second prism 3 are provided behind an optical path passing through the objective lenses 1 and 2. An erecting image optical system including the prism 4 is provided.
The erecting image optical system is provided to convert the left and right and upside down images of the real image formed by the objective lens system into an erecting image, and the image forming surface is located behind the first prism 3. is there.

An eyepiece lens 5 is arranged behind the second prism so that the subject image can be magnified and viewed.

FIG. 2 is a block diagram showing a viewfinder unit applied to the camera of the first embodiment of the present invention.
FIG. 2 is a horizontal cross-sectional view of the finder unit in which the real image type finder optical system described in FIG.

As shown in FIG. 2, the real image type finder optical system described with reference to FIG. 1 is arranged substantially in the center of the finder unit 13 which is a casing. That is, two positive and negative (concave and convex) objective lenses 1 and 2 of the objective lens system, the first and second prisms 3 and 4 of the erecting image optical system, and the eyepiece lens 5 are arranged.

At both ends of the finder unit 13, subject distance measuring means (autofocus (AF) system) provided for measuring the distance to the subject by triangulation is provided. The subject distance measuring means (AF system) includes light-projecting and light-receiving lenses 7 and 8 arranged toward the front surface on both side ends of the finder unit 13, and the light-projecting and light-receiving lenses 7 and 8.
Light emitting and receiving elements 9, 1 provided at the rear of each
It is composed of 0 and 0.

At a position sandwiched between the light receiving lens 8 and the real image type finder optical system, a photometric lens 6 for performing photometry is arranged toward the front surface of the finder unit 13, and further. A photometric element 11 is provided behind it.

When the real image type finder optical system is a zoom type finder, the lenses 1 and 2 of the objective lens system move to change the focal length, and a finder due to a change in subject distance. The correction of the change in diopter is performed by moving the lens 1 in the optical axis direction of the real image type finder optical system.

FIG. 3 is a longitudinal sectional view of a main part of a finder device applied to the camera capable of parallax correction according to the first embodiment of the present invention, as viewed from the side. In the first embodiment, in the camera in which the finder unit 13 which is the case described in FIG. 2 is arranged, the entire finder unit 13 is rotated so that the optical axis of the real image type finder optical system. Is rotated toward the optical axis side of a taking lens (not shown) to correct parallax. The configuration will be described below.

As shown in FIG. 3, the finder unit 13 is composed of objective lenses 1 and 2 of an objective lens system, first and second prisms 3 and 4 of an erecting image optical system, an eyepiece lens 5 and the like. The above-mentioned real image type finder optical system of FIG. 1 and the subject distance measuring means (AF system) including the light projecting and receiving lenses 7, 8 and the light projecting and light receiving elements 9, 10 and the like (AF system). See FIG. 2).
A rotation center 14 on the lower side of the finder unit 13 is rotatably supported by a rotation shaft provided on the camera body, and on the rear side of the upper side of the finder unit 13, the camera is provided. The finder unit 13 as a whole is urged clockwise by an urging spring 15 whose one end is supported by the main body.

On the lower rear side of the finder unit 13, there is provided a rotation driving means which is a driving means for rotating the finder unit 13 to a predetermined position for correcting parallax. The rotation driving means includes a cam 16 which is a cam means, a gear train 17 which is a cam driving means, a motor 21, a photo interrupter 23 which is a rotation amount detecting means for detecting the rotation amount of the motor 21, and the like. That is, the finder unit 1
A cam surface of a cam 16 is arranged in contact with the lower part of the rear side of the cam 3, and the driving force of the motor 21 is transmitted to the cam 16 via a gear train 17.
At this time, the rotational driving force of the gear train 17 transmitted from the motor 21 has its driving direction changed by the rack portion below the cam 16, and the cam 16 is driven in the front-back direction of the optical axis of the real-image finder optical system. It is supposed to be done. The rotation amount of the motor 21 is determined by the photo interrupter 2
The rotation amount is detected by 3.

The rotation driving means is the subject distance measuring means (AF) provided in the finder unit 13.
Based on the output of the measurement result of the system), the output of the photo interrupter 23, and the like, the system control unit (not shown) provided in the camera body and including, for example, a CPU
The rotational drive is controlled by.

The parallax correction operation of the finder device of the camera according to the first embodiment having the above-described structure will be described below.
This will be described below.

First, the object distance measuring means (AF system) in the finder unit 13 measures the distance to the object, and object distance information is output according to the distance measurement result. Based on this output, the system control means of the camera body controls the rotation driving means, and the motor 21 is rotated by a predetermined amount.
Moves in the front-rear direction of the optical axis of the real-image finder optical system, and the entire finder unit 13 rotates counterclockwise about the rotation center 14 of the finder unit 13 that is pivotally supported by the rotation shaft of the camera body. To do.

Therefore, the finder unit 13 having at least the real image type finder optical system and the object distance measuring means (AF system) is rotationally driven in the optical axis direction of the taking lens so that the optical axis of the real image type finder optical system is changed. By tilting, parallax at close-up shooting is corrected.

According to the first embodiment, at least the finder optical system and the subject distance measuring means (AF system) are provided by driving the motor 21 according to the output of the subject distance measuring means, that is, the subject distance. By rotating the finder unit 13 and tilting the optical axis of the finder optical system in a direction intersecting the optical axis of the taking lens, parallax that occurs during close-up photography can be corrected.

Further, the finder optical system and the object distance measuring means (AF system) are unitized as the finder unit 13, so that the finder unit 1
By moving the entirety of 3, it is possible to simultaneously correct parallax generated between the taking lens, the finder optical system, and the subject distance measuring means (AF system).

FIG. 4 is a longitudinal sectional view of a main part of a camera according to a second embodiment of the present invention, which is a side view of the finder optical system and the taking lens. In the camera of the second embodiment, these operations are performed for focus adjustment (diopter adjustment) of the finder optical system, focus adjustment of the taking lens, and parallax correction occurring between the taking lens and the finder optical system. This is performed by one drive motor.

As shown in FIG. 4, the finder unit 13A applied to the second embodiment is similar to the finder unit 13 of the above-mentioned first embodiment in that the lower center of rotation 14A of the rear portion of the finder unit 13A is the same. Is rotatably supported by a rotating shaft (not shown) provided in the camera body, and the urging spring 1 is supported by the camera body at one end below the front side of the finder unit 13A.
The entire unit 13A is biased clockwise by 5A. And this finder unit 13A
Includes the finder optical system and subject distance measuring means (AF
system. And (not shown) are provided.

In the finder unit 13A,
A finder focus adjusting mechanism is provided for adjusting the focus of an image formed by the finder optical system (adjusting the diopter). This finder focus adjusting mechanism is configured as follows. That is, the objective lens 1A of the finder optical system is arranged with its upper end supported by the lens support member 25 and its lower end supported by the support nut 19. The lens support member 25
Is slidably supported by a suspension shaft 26, both ends of which are axially supported and fixed to the inner wall surface of the finder unit 13A, and is slidably supported.
One end of the reference numeral 9 is rotatably supported on the inner wall surface of the finder unit 13A, and the other end is screwed on a feed screw 18 which is an optical system moving means rotatably supported on the wall surface of the finder unit 13A. Have been combined. In addition,
One end of the feed screw 18 is rotatably supported so as to penetrate the wall surface of the finder unit 13A and project to the outside of the unit, and has a driving force of a motor 21A described later at its end. Connection means 32 for transmitting
Is provided. Therefore, the driving force in the rotation direction by the feed screw 18 is converted into the driving force in the front-rear direction by the support nut 19, and the objective lens 1A of the finder optical system is moved in the front-rear direction.

A projection 25b is provided on one end of the lens support member 25 so as to project toward the upper side of the finder unit 13A. This protrusion 2
The tip portion of 5b is arranged so as to always contact the cam surface of the cam 24 provided above the finder unit 13A. The cam 24 is fixed to the camera body and is a rotating means that rotates the finder unit 13A in cooperation with the protrusion 25b.

Further, in the camera body of the second embodiment, in addition to the finder focus adjusting mechanism, in order to adjust the focus of the subject image formed by the taking lens, the taking lens moving means is used. A lens focus adjustment mechanism is provided. The photographing lens focus adjusting mechanism is configured similarly to the finder focus adjusting mechanism. That is, the objective lens 20 of the taking lens is provided with its upper end supported by the lens support member 27 and its lower end supported by the support nut 30, and the lens support member 27 has its both ends attached to the camera body. The suspension nut 28 is rotatably supported and pierced so as to be slidably supported, and the support nut 30 is a photographing lens moving unit whose one end is rotatably supported by the camera body. It is supported by being screwed onto the feed screw 29. A spur gear, which is a part of the gear train 17A for transmitting the driving force of the motor 21A, is disposed at the other end of the feed screw 29, and the spur gear is connected to the motor 21A via the gear train 17A. It is connected and can rotate. The rotation driving force of the feed screw 29 is converted into a driving force in the front-back direction of the optical axis of the taking lens by the support nut 30, and the objective lens 20 of the taking lens is converted.
Is moved in the front-rear direction to focus the subject image formed on the surface of the film 25.

In order to transmit the driving force of the motor 21A to both the feed screw 18 of the finder focus adjusting mechanism and the feed screw 29 of the photographic lens focus adjusting mechanism, for example, a gear train, a chain, a belt or the like is used. Is provided so that the rotation amount of the motor 21A can be detected by the encoder 22 and the photo interrupter 31 and the like, and the finder optical system of the finder optical system by the feed screw 18 which is the optical system moving means is provided. The amount of extension of the objective lens 1 is provided in the camera body based on the output of the measurement result of the subject distance measuring means (AF system) provided in the finder unit 13A, the output of the photo interrupter 31, etc. It is controlled by a system control means (not shown) including a CPU and the like. It is adapted to be.

The operation of the finder optical system and the taking lens of the camera of the second embodiment constructed as above will be described below.

The subject distance measuring means (AF system) provided in the finder unit 13A measures the distance to the subject, and when the distance measurement result is output, the motor 21A is driven to rotate. Starting, the finder optical system and the objective lens of the taking lens are moved to a predetermined position where the subject image is focused. At this time, the system control means controls the rotation amount of the motor 21A which is the rotation driving means.

When the rotational driving of the motor 21A is started, the driving force is transmitted to the feed screw 18 of the finder optical system via the connecting means 32 and to the feed screw 29 of the photographing lens via the gear train 17A. To be done. Then, the rotational driving force of the feed screws 18 and 29 is equal to that of the support nuts 19 and 3.
The finder optical system supported by 0 and the objective lenses 1 and 20 of the photographing lens are moved in the front-back direction of the respective optical axes. Although the absolute value of the amount of extension of the objective lenses 1 and 20 at this time varies depending on the reduction ratio of the connecting means 32 and the like, the finder optical system side and the taking lens side are in a proportional relationship with each other. According to the distance, the finder focus adjusting mechanism and the photographing lens adjusting mechanism adjust the focus with different amounts of extension.

Since the projection 25b of the lens support member 25 is always in contact with the cam surface of the cam 24 supported by the camera body as the objective lens 1 moves, the entire finder unit 13A is , Center of rotation 14
It rotates counterclockwise about A as an axis. Then, the optical axis of the finder optical system is inclined toward the optical axis of the taking lens, and the optical axis of the finder optical system and the optical axis of the taking lens intersect, so that parallax correction during close-up photography is performed.

Therefore, the focus adjustment of the finder optical system and the photographing lens is simultaneously performed, and the parallax is corrected by rotating the finder unit 13A by the movement of the objective lens 1 of the finder optical system. .

According to the second embodiment, by driving one motor 21A provided in the camera body, the focus adjustment (diopter adjustment) of the finder optical system, the focus adjustment of the photographing lens, and the parallax are performed. Can be corrected at the same time.

The objective lens 1 of the finder optical system
Is extended by an amount of extension different from that of the objective lens 20 of the photographing lens according to the subject distance, so that the diopter does not change and the real image of the subject is always formed behind the first prism 3 (see FIG. 1). As a result, it is possible to realize a viewfinder that is easy to see, and at the same time, it is easy to observe a subject image, so that efficient photography can be performed.

FIG. 5 is a longitudinal sectional view of a main part of a finder device applied to a camera according to a third embodiment of the present invention, viewed from the side. The finder device of the camera of the third embodiment has basically the same configuration as the finder device of the second embodiment described above, but in the third embodiment, an optical system whose focal length is changeable. In the zoom finder, two objective lenses of the finder optical system are independently moved. less than,
The configuration will be described.

As shown in FIG. 5, the zoom finder unit 13B is rotatable about a rotation center 14B on a rotation shaft (not shown) of the camera body as in the first and second embodiments. The entire unit is urged clockwise by a urging spring 15B supported at one end by the camera body below the front side of the zoom finder unit 13B.

In the zoom finder unit 13B, a subject distance measuring means (AF system, not shown), a zoom finder optical system and the like are provided. The zoom finder optical system includes a first group frame 46 and a second group frame 4
In the first group frame 46, the objective lens 1 of the zoom finder optical system is provided in the lens support member 2.
The suspension shaft 26B is supported from above by 5B, and the lens support member 25B is slidably supported by penetrating a suspension shaft 26B whose both ends are supported and fixed to the inner wall surface of the first group frame 46. There is.

A projection 25Ba is provided at one end of the lens support member 25B on the side supporting the objective lens 1 toward the rear of the camera body in the optical axis direction of the zoom finder optical system. The tip portion of the protrusion 25Ba is arranged so as to always come into contact with the cam surface of the focus cam 51 provided behind the support member 25B. A gear portion is provided at a rear end portion of the focus cam 51, and the focus motor 49 is connected via the gear portion and a telescopic gear train 50, so that the driving force of the focus motor 49 is the focus. It is adapted to be transmitted to the cam 51.

A projection 25Bb is provided upward at the other end of the lens support member 25B. The tip portion of the projection 25Bb is a finder unit rotating means that is fixedly provided on the camera body above the zoom finder unit 13B, and is a rotation amount that changes the rotation amount of the finder unit depending on the focal length. It is arranged so as to always come into contact with the cam surface of the three-dimensional cam 24B which is the changing means. The solid cam 24B is, for example, a gear train, a chain,
It is connected to the zoom motor 41 via a connecting means 52 constituted by a belt or the like, and the driving force of the zoom motor 41 is transmitted to the three-dimensional cam 24B.

Above the first group frame 46 and the second group frame 48 forming the zoom finder optical system, a suspension shaft 47 is fixed to the inner wall surface of the zoom finder unit 13B with its both ends pivotally supported. This suspension shaft 4
7 penetrates the cylindrical portions 46a and 48a provided on the upper portions of the first group frame 46 and the second group frame 48, and the first and second groups 46a and 48a are formed.
The group frames 46 and 48 are slidably supported.

Further, a support nut 19B is provided below the first group frame 46, and the support nut 19B is provided.
And a feed screw 44, one end of which is rotatably supported, is screwed onto the inner wall surface of the zoom finder unit 13B, and a gear 42 is provided at the other end of the feed screw 44. The rotary drive force of the zoom motor 41 is transmitted.

A protrusion 48b is provided below the second group frame 48. The tip portion of the protrusion 48b is fitted into a non-linear groove provided on the peripheral surface of the cam shaft 45, one end of which is rotatably supported by the zoom finder unit 13B, and the other end thereof. Is provided with a gear 43, which transmits the rotational driving force of the zoom motor 41 to the feed screw 44 via the gear 42 to move the first group frame 46 in the front-back direction of the optical axis of the zoom finder optical system. The cam shaft 45 is rotated while being driven, and the second group frame 48 is driven in the front-rear direction of the optical axis of the zoom finder optical system. Further, the second motor is driven by the zoom motor 41. Due to the zooming operation, the first group frame 46 of the zoom finder optical system is extended and the lens supporting member 25 is moved.
B moves, and at the tip portion 25Bb thereof, the solid cam 24 is moved.
Since the cam surface of B is always in contact, the entire finder unit 13B rotates about the rotation center 14B.

The feed screw 44 and the cam shaft 45 are
Even if the same rotation is performed by the driving force of the zoom motor 41, the movement of the first group frame 46 by the feed screw 44 and the movement of the second group frame 48 by the cam shaft 45 are performed by the cam shaft 45. Because it has a non-linear groove,
Each of them behaves differently.

On the other hand, in order to adjust the focus (diopter adjustment) of the zoom finder, the amount of extension of the objective lens 1 of the first group frame 46 is, of course, changed depending on the subject distance. However, it must be changed depending on the focal length. The relationship between the amount of extension of the objective lens 1 and the subject distance and focal length at this time is shown in FIG.
It is shown in the graph of (a).

As shown in FIG. 6A, at the same object distance, the longer the focal length, the larger the amount of extension of the objective lens 1, but the rotation of the finder unit 13B for correcting parallax. Momentum is independent of focal length. However, in the third embodiment, since the finder unit 13B is rotated by the unfolding operation of the objective lens 1, the rotation amount of the finder unit 13B on the telephoto side is exceeded as it is. Will be lost.

Therefore, by rotating the three-dimensional cam 24B in conjunction with the zooming operation by the zoom motor 41, when the lens support member 25B and the objective lens 1 are extended by the three-dimensional cam 24, the objective lens 1 is telephoto. On the (Tele) side and wide-angle (Wide)
The rotation amount of the finder unit 13B must be different from that on the side.

Therefore, in the third embodiment, by connecting the zoom motor 41 to the three-dimensional cam 24B through the connecting means 52, the three-dimensional cam 24B is rotated in association with the zooming operation by the zoom motor 41. It is designed to move. The inclination of the cam surface of the three-dimensional cam 24B at this time is, as shown in the graph of FIG. 6B, the cam of the three-dimensional cam 24B so that it is smaller on the telephoto (Tele) side than on the wide-angle (Wide) side. By forming the surface, the amount of rotation of the zoom finder unit 13B, which does not depend on zooming but depends only on the subject distance, is determined. That is, the cam surface of the cam 24B is as shown in FIG.
The shape is as shown in (C) and (D).

FIG. 6C is an enlarged view of the main part of the connecting portion between the three-dimensional cam 24B and the connecting means 52 as seen from the direction AA of FIG. 5, and FIG. 6D shows the cam of the three-dimensional cam 24B. The front view at the time of seeing the inclined part of a surface from the B direction is shown.

As shown in FIG. 6C, the three-dimensional cam 24B.
A gear portion provided inside one end of the three-dimensional cam 24 meshes with a gear portion provided at one end of the connecting means 52.
B is rotated. And FIG. 6 (D)
As shown in FIG. 6, the inclination of the cam surface of the cam 24B at the time of close-up photography is formed so that the peak becomes lower on the telephoto (Tele) side than on the wide-angle (Wide) side. 6 (B), that is,
The inclination of the three-dimensional cam 24B is smaller on the telephoto (Tele) side than on the wide-angle (Wide) side.

Next, the operation of the zoom finder device for a camera according to the third embodiment having the above-mentioned structure will be described below.

First, when the zoom motor 41 is rotated for zooming operation, for example, when the zoom switch provided on the camera body is operated, the driving force thereof is the gear 4.
Via the cam shaft 45 and the feed screw 44.
By rotating each of them, a zooming operation is performed in which each of the second group frame 48 and the first group frame 46 of the zoom finder optical system is extended in the optical axis direction of the zoom finder optical system. At the same time, the focus motor 49 rotates based on the output of the distance measurement result by the distance measuring means (not shown) of the camera, and the focus cam 51 rotates via the telescopic gear train 50. Lens support member 2 in contact with the cam surface of 51
The projection 25Ba of 5B extends the objective lens 1 to adjust the focus of the zoom finder optical system.

Along with this, the lens supporting member 25B
Since the protruding portion 25Bb of the three-dimensional cam 24B is in contact with the cam surface of the three-dimensional cam 24B, the objective lens 1 of the first group frame 46 is extended, and the three-dimensional cam 24B zooms via the connecting means 52 as described above. Interlocked with the zooming operation of the motor 41, the motor 41 rotates by a rotation amount according to the focal length.

On the other hand, at the same time as the amount of extension of the objective lens 1 is adjusted according to the focal length, the finder unit 13B is caused to rotate by the cam 24B with the center of rotation 14 as an axis in conjunction with the extension operation of the objective lens 1. It rotates counterclockwise against the biasing force of 15. Therefore, the optical axis of the zoom finder optical system is tilted toward the optical axis of the taking lens to correct the parallax between the taking lens and the zoom finder optical system disposed in the finder unit 13B and the object distance measuring means. Is done.

According to the third embodiment, in the camera provided with the finder device having the zoom finder optical system, the rotation amount of the finder unit 13B is adjusted according to the subject distance and the focal length.
It is possible to correct parallax that occurs between the taking lens, the finder optical system, and the subject distance measuring means during close-up photography.

FIG. 7 is a block diagram of the camera of the fourth embodiment of the present invention. The camera of the fourth embodiment is basically a camera having the same configuration as that of the above-mentioned third embodiment, and all of the focus adjustment of the photographing lens, the diopter adjustment of the viewfinder, the parallax correction and the like are performed. The operation is performed by one motor (mechanical mechanism is not particularly shown).

As shown in FIG. 7, in the camera body, there is provided a system control means 78 for controlling the entire system, which is composed of, for example, a CPU, and the distance measurement connected to the system control means 78 is provided. The means 62 controls the light emitting / receiving lenses 63, 64 for measuring the distance to the subject by triangulation and the light emitting / receiving elements 65, 66 arranged behind them to perform the distance measurement. Further, both the objective optical system including the objective lenses 60 and 61 of the zoom finder optical system and both the first group lens 70 and the second group lens 71, which are photographing lenses including the two-group zoom, are brought into focus. Lens driving means 67 for driving
And zooming means 69 for changing the focal lengths of both the zoom finder optical system and the taking lens,
Each operation mechanism of the camera such as a lens position detecting means 68 for detecting the focus position of the objective lens optical system of the photographing lens and a zoom position detecting means 72 for detecting the focal length of the photographing lens is electrically connected to the system control means 78. Connected to each other.

The system control means 78 is an EEPROM for storing adjustment values for each camera.
(ROM capable of electrically writing and erasing information) 79
And a viewfinder display means 82 for displaying shooting information such as a focus indication in the viewfinder of the camera, a release button 80 including a half-press switch (1R) and a shooting switch (2R), and a user of the camera viewing the viewfinder. In order to detect what is looked into, each operating mechanism such as an eye sensor 81 including a light emitting / receiving element provided near the finder is electrically connected.

Next, the operation of the camera of the fourth embodiment having the above-described structure will be described below with reference to the flowchart of FIG.

As shown in Fig. 8, first, a power switch (POWER SW) provided in the camera body is turned on ((S1). Here, S indicates an operation step. .). Then, the eye sensor 81 provided near the finder operates to start detecting whether or not the finder of the camera is looked into (S2). Here, when the eye sensor 81 detects that the finder is being looked into by the user of the camera (when the eye sensor 81 is turned on), the distance measuring means 62 operates to change the distance to the subject. Distance measurement is performed and the subject distance 1 / l ₀ is detected (S3).

Next, the zoom position detecting means 72
Since the focal length f _{TL at} this time is output (S4), the system control means 78 calculates the lens extension amount K from the subject distance 1 / l ₀ and the focal length f _TL detected in steps S3 and S4. To the following predetermined formula (1)
(S5).

K = f (1 / l ₀ , f _TL ) (1) Then, by the lens driving means 67 and the lens position detecting means 68, the first lens group 70 of the photographing lens and the objective lens of the finder lens optical system. By moving 60, the finder is in focus regardless of the subject distance (S6). Then, at this time, similarly to the third embodiment, the parallax correction is completed by the three-dimensional cam 24B without depending on the focal length.

Next, when the release button 80 is half-pressed (1R) with the first stroke (S7), the in-viewfinder display means 82 displays the in-focus state to confirm the lens drive. The focus is locked and the camera is ready for shooting (S9).

On the other hand, when the release button 80 is not pressed halfway (1R) in step S7, the operations of steps S3 to S6 are repeated at predetermined intervals by the timer (S8). .

As described above, in step S9, when the in-viewfinder display means 23 is focused (S9), the user of the camera confirms that the real image of the subject is surely formed in the finder. After checking, press the second stroke of the release button 80. As a result, the photographing switch (2R) is turned on (S10), so the shutter is controlled so that the film is properly exposed by opening the shutter (S11), and when the exposure is completed. The film is fed (S12) for the next shooting, and the series of shooting processing is completed.

According to the fourth embodiment, the focus adjustment of the photographing lens, the diopter adjustment of the finder, and the parallax correction are performed by one motor, so that the driving mechanism is simplified. . Therefore, the manufacturing cost of the camera can be reduced, and the number of members provided in the camera body is reduced, so that the space in the camera can be saved.

Further, an eye sensor is provided in the vicinity of the finder to detect whether or not the user of the camera looks into the finder, thereby starting the photographing sequence, and at this point the parallax is already corrected. By doing so, it is possible to provide a parallax-correctable camera capable of starting photography faster and more easily.

[Supplementary Notes] (1) In a parallax-correctable camera for correcting parallax between a taking lens and a viewfinder optical system, the camera is formed separately from the camera body, and at least the viewfinder optical system and subject distance measuring means. A housing provided with, a driving means for driving the housing to a predetermined position for correcting parallax, and a control means for controlling the driving means based on the output of the subject distance measuring means. A parallax-correctable camera equipped.

The parallax-correctable camera is formed separately from the camera body, and has a housing provided with at least a finder optical system and subject distance measuring means (autofocus (AF) system). Based on the output of the subject distance measuring means (AF system), the driving means is controlled by the control means to drive the casing to a predetermined position, whereby a parallax generated between the taking lens and the viewfinder optical system. To correct.

As a result, the entire housing provided with the finder optical system and the subject distance measuring means (AF system) is driven toward the optical axis side of the taking lens, and therefore the finder optical system and the subject distance measuring means are used. It is possible to provide a camera capable of simultaneously correcting parallax generated between the (AF system) and the taking lens.

(2) The drive means is a rotation drive means for rotationally driving the casing, and the casing is provided on the camera body having the photographing lens and rotates about a rotation axis. The camera capable of parallax correction according to appendix 1.

The driving means of the parallax-correctable camera is such that the casing fixed to the camera body so as to be rotatable about a rotation axis is centered on the rotation axis.
Parallax is corrected by rotationally driving by the rotational driving means and driving the optical axis of the finder optical system to the optical axis side of the taking lens.

As a result, the entire housing provided with the finder optical system and the subject distance measuring means (AF system) is driven to rotate toward the optical axis of the taking lens, and the finder optical system and the subject distance measuring means are used. It is possible to provide a camera capable of simultaneously correcting parallax generated between the (AF system) and the taking lens.

(3) The rotation driving means is composed of a cam means that comes into contact with a part of the casing, and a cam driving means that drives the cam means. Camera.

By forming the rotation driving means of the parallax-correctable camera from the cam means and the cam driving means, the entire casing is driven, so the finder optical system and the object distance measuring means (AF system). It is possible to provide a camera capable of simultaneously correcting the parallax generated between the image pickup lens and the photographing lens in accordance with the focusing operation by the object distance measuring means.

(4) A finder unit which has a finder optical system and is rotatable about a rotation axis provided in the camera body, and at least a part of the finder optical system are moved. Based on the output of the optical system moving means, the projection provided on a part of the finder optical system, the cam means for rotating the finder unit in cooperation with the projection, and the output of the subject distance measuring means, A control means for controlling the amount of movement of the lens in the optical system moving means, wherein the image forming position of the finder optical system is defined by the movement of the lens in the optical system moving means, and the projection is centered. By rotating the viewfinder unit to correct the parallax of the taking lens and viewfinder optical system, parallax correction is possible. camera.

In the parallax-correctable camera, at least a part of the finder optical system provided in the finder unit is moved by the optical system moving means based on the output of the subject distance measuring means (AF system).
At this time, the moving amount of the lens in the optical system moving means is controlled by the control means. Then, by moving the lens in the optical system moving means, the image forming position of the finder optical system is regulated, and the finder unit is rotated by the cam means in cooperation with the protrusion provided on a part of the finder optical system. Then, correct the parallax of the taking lens and viewfinder optical system.

Thus, the finder unit having the finder optical system is moved by moving a part of the lenses of the finder optical system to define the image forming position of the finder optical system and to rotate the finder unit in conjunction with this. It is possible to provide a camera that can be moved to correct the parallax between the taking lens and the viewfinder optical system.

(5) A photographing lens moving means for moving the photographing lens is provided, and the photographing lens moving means outputs the object distance measuring means by a part of the driving means for driving the optical system moving means. The parallax-correctable camera according to Supplementary Note 4, which is moved to a position based on the above.

In the above parallax-correctable camera, the taking lens is provided with a taking lens moving means that is driven by a part of the driving means of the optical system moving means.
The object distance measuring means (AF system) is moved to a position based on the output.

As a result, the driving means for moving the taking lens and the finder optical system can be simplified, which contributes to downsizing of the camera. Further, it is possible to provide a camera capable of parallax correction that contributes to cost reduction.

(6) The camera capable of parallax correction according to the fourth or fifth aspect, wherein the subject distance measuring means is provided in the finder unit.

By providing the object distance measuring means (AF system) of the camera capable of parallax correction on the finder unit provided with the finder optical system, the finder optical system and the object distance measuring means (AF) are provided.
System) can be tilted toward the optical axis side of the taking lens at exactly the same time, so a parallax that occurs between the viewfinder optical system, subject distance measuring means (AF system) and taking lens can be corrected at the same time. Can be provided.

(7) The viewfinder optical system is an optical system capable of changing the focal length, and the rotating means has a rotating amount changing means for changing the rotating amount according to the focal length. ~ The parallax-correctable camera as described in any one of Supplementary Notes 6.

The finder optical system of the parallax-correctable camera is a zoom finder, and the rotation amount of the finder unit is changed by the rotation amount changing device according to the focal length.

As a result, even if the finder optical system is a zoom type finder, it is possible to provide a camera in which parallax correction is accurately performed without depending on the focal length.

(8) The parallax-correctable camera as set forth in appendix 7, wherein the rotation amount changing means is a three-dimensional cam that makes the rotation amount of the finder unit the same even when the subject distance is the same.

By using a stereoscopic cam as the rotation amount changing means of the finder unit of the camera capable of parallax correction, the rotation amount of the finder unit becomes the same when the object distance is the same regardless of the focal length. Therefore, even if the viewfinder optical system is a zoom type viewfinder, it is possible to provide a camera capable of more accurate parallax correction.

(9) An eye sensor is provided in the vicinity of the viewfinder window, and the subject distance measuring means is driven based on the viewfinder, and the photographing sequence is started. The camera capable of parallax correction according to any one of 1.

The parallax-correctable camera is provided with an eye sensor in the vicinity of the viewfinder window, which detects that the user of the camera has looked into the viewfinder and starts the photographing sequence.

As a result, the user of the camera does not need to perform complicated switch operations before taking a picture when taking a picture, and can simply look into the finder of the camera without being aware of the switch operation of the camera. Since the shooting sequence is started and the parallax correction has already been performed at this point, it is possible to provide a parallax-correctable camera capable of starting photography faster and easily.

[0097]

As described above, according to the present invention, the entire housing of the finder unit having the object distance measuring means (autofocus (AF) system), the finder optical system, etc. is rotated by the rotating means. By doing so, a parallax-correctable camera capable of simultaneously correcting parallax occurring between the taking lens, the viewfinder optical system, and the subject distance measuring means (autofocus (AF) system) with a simple configuration Can be provided.

Furthermore, by providing an eye sensor or the like near the finder, the camera user can start the photographing sequence just by looking into the finder.
Since the parallax correction has already been performed at this point, it is possible to provide a parallax-correctable camera capable of starting photography faster and more easily.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a real image type viewfinder optical system applied to a viewfinder device of a camera of the present invention.

FIG. 2 is a cross-sectional view of the viewfinder unit of the camera of the first embodiment of the present invention as seen from above.

FIG. 3 is a longitudinal sectional view of a main part of a finder portion of the camera of the first embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of a main part of a camera according to a second embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a main part of a camera according to a third embodiment of the present invention.

6A and 6B are diagrams showing the relationship between the amount of extension of the finder lens and the subject distance and the focal length in the camera of FIG. 5, and FIG. 6B shows the relationship between the tilt of the cam surface of the stereoscopic cam and the focal length. The figure which shows, (C) is the principal part enlarged view of the solid cam seen from the AA direction of the said FIG. 5, (D) is the front view which looked at the inclined part of the cam surface of a solid cam from the B direction.

FIG. 7 is a block configuration diagram of a camera of a fourth embodiment of the present invention.

8 is a flowchart showing the operation of the camera shown in FIG.

[Explanation of symbols]

1 ………… Objective lens (finder optical system) 5 ………… Eyepiece 13 ………… Finder unit 14 ………… Rotation center (rotating shaft) 15 ………… Biasing spring 16 ………… Cam (drive) Means, rotation driving means, rotation means,
Cam means 17 ... Gear train (cam drive means) 21 Motor (cam drive means) 23 Photo interrupter

Claims (4)

[Claims] 1. A camera capable of compensating for parallax between a taking lens and a finder optical system, comprising: a finder unit having at least a finder optical system and subject distance measuring means; and compensating the finder unit for parallax. A camera capable of parallax correction, comprising: a driving unit that drives the driving unit to a predetermined position, and a control unit that controls the driving unit based on an output of the subject distance measuring unit. 2. The drive means is a rotation drive means for rotationally driving the finder unit, and the finder unit rotates about a predetermined rotation axis provided in a camera body having the taking lens. The camera capable of parallax correction according to claim 1, wherein the camera is capable of parallax correction. 3. A finder unit which has a finder optical system and is rotatable about a rotary shaft provided in a camera body, and an optical system for moving at least a part of the finder optical system. Based on the output of the system moving means, the protrusion provided on a part of the finder optical system, the rotating means for rotating the finder unit in cooperation with the protrusion, and the output of the subject distance measuring means. Control means for controlling the amount of movement of the optical system moving means, by which the image forming position of the finder optical system is regulated by the movement of the optical system moving means, and the finder unit is rotated around the protrusion. A camera capable of parallax correction, which is moved to correct the parallax of the taking lens and the viewfinder optical system. 4. A photographing lens moving means for moving said photographing lens, said photographing lens moving means being a position based on an output of said subject distance measuring means by a part of driving means for driving said optical system moving means. 4. The parallax-correctable camera according to claim 3, wherein the camera is moved to.