JPH05107601A - Finder device - Google Patents

Abstract

PURPOSE:To execute relative positioning between reflecting members with high accuracy, and to prevent an optical axis from being deviated by providing a holding member for integrally holding two reflecting members arranged nearly in parallel with each other among plural reflecting members. CONSTITUTION:This finder device has plural reflecting members (mirrors) 10, 11, 13, 15, and 18 in an optical path, and is provided with the holding member (objective block) 31 to integrally hold two reflecting members 10 and 11 arranged nearly in parallel with each other among the plural reflecting members 10, 11, 13, 15, and 18. Since two reflecting members 10 and 11 are arranged nearly in parallel with each other, even though the position of the holding member 31 to integrally hold them is somewhat shifted, the position of the optical axis is hardly influenced. Thus, the relative positioning between two reflecting members 10 and 11 can be executed with high accuracy, and the optical axis is not shifted even though the entire holding member 31 is shifted by attaching error, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a finder device, and more particularly to a relay finder device applicable to a trimming system, a single-lens reflex camera (SLR) which can be used for panoramic photography and the like.

[0002]

2. Description of the Related Art Since a viewfinder including a relay optical system has a longer optical path than a viewfinder using a pentaprism, a plurality of reflecting members are provided for compactness. For example, there is known a device in which a polo mirror is used as a reflecting member in a finder using a relay optical system, but the polo mirror is composed of two sheets held integrally by a holding member so as to form an opening angle of 90 °. Made of flat mirrors.

[0003]

However, in the case where the two reflecting surfaces are formed by the mold of glass or plastic like the polo mirror, the relative positional relationship between the two reflecting surfaces can be manufactured with high accuracy. On the other hand, since the convergent light passes through a medium such as glass or plastic that is interposed between two parallel reflecting surfaces, the optical optical path becomes shorter than the physical length, especially when using a relay optical system. It is not effective for an optical system such as a viewfinder that requires a very long optical path to be compactly assembled. Also,
Even if the relative positioning between the two reflecting members is performed with high accuracy, if the mounting position of the reflecting member is misaligned due to the mounting error of the holding member, etc., the optical axis will shift, and the viewfinder field of view will actually be photographed. Problems such as out of range will occur.

The present invention has been made in view of such a point, and the relative positioning between the two reflecting members can be performed with high accuracy, and the entire holding member is displaced due to an attachment error or the like. Even if the optical axis is not displaced, it is an object to provide a compact finder device.

[0005]

In order to achieve the above object, a finder device of the present invention is a finder device having a plurality of reflecting members in an optical path, wherein the plurality of reflecting members are arranged substantially parallel to each other. The present invention is characterized in that it is provided with a holding member that holds the two formed reflective members together.

[0006]

According to this structure, since the two reflecting members are arranged substantially parallel to each other, even if the position of the holding member that integrally holds them is slightly changed, the position of the optical axis has almost no influence. I do not receive it.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a schematic configuration of a camera including a finder device to which the present invention is applied. In the figure, reference numeral 1 is a taking lens, which is usually detachable from the camera body 4. Reference numeral 2 denotes a main mirror that guides the light that has passed through the taking lens 1 toward an upper finder optical system 3, and is provided inside the camera body 4. 5 indicates a film. 6 is a part of the light from the taking lens 1
The AF sub-mirror is directed to the F (automatic focus detection) module 7.

The finder optical system 3 includes, in order from the upstream side of the light, a focusing plate 8 arranged at a position of a primary image plane where a primary image is formed by the taking lens 1, and a first condenser lens 9.
A first mirror 10 that directs the light from the condenser lens 9 forward, a second mirror 11 that directs the light from the first mirror 10 upward, and a reduced virtual image of the primary image of the focusing screen 8 as the focus. A relay system auxiliary lens 12 for forming light on the downstream side of the plate 8; and a third mirror 13 for directing the light from the relay system auxiliary lens 12 to the optical axis of the photographing lens 1 and to the rear. A zoom relay lens system 14 used for pseudo zoom, a fourth mirror 15 for directing light from the zoom relay lens system 14 downward, a second condenser lens 16, and a secondary image surface on which a secondary image is formed. A field frame 17 arranged at a position, and the light passing through the field frame 17 is directed rearward in parallel with the optical axis of the photographing lens.
An LCD (liquid crystal display element) 20, which is composed of a mirror 18 and a fixed eyepiece lens 19, and further creates display characters for so-called infinder display for displaying shutter speed, aperture value, etc. outside the field of view, An infinder submirror 21 and an infinder prism 22 are provided at the positions shown in the figure. In addition, 23 has shown the pupil position.

In this embodiment, the main mirror 2 and the first to fifth parts are arranged.
Mirrors 10, 11, 13, 15, 18 total 6 (even)
Since the mirror is used, the final viewfinder image is an erect image for the image to be captured.

The zoom relay lens system 14 is composed of a two-component, three-lens configuration lens system and moves while changing the relative relationship in correspondence with the trimming magnification by the pseudo zoom, so that the secondary image plane changes from the primary image plane. The image magnification on the secondary image plane with respect to the primary image plane can be changed while keeping the conjugate length up to the image plane constant.

The pseudo zoom and trimming magnification will be described. Recently, a trimming system applicable to a camera has been proposed. This system
For example, by copying information that specifies a predetermined range in the image forming area B of the film 141 shown in FIG. 14A, that is, a part of the area A, to a predetermined portion 142 of the emulsion surface of the film 141, This is a system in which the area A can be stretched at the time of printing to print on the area A ′ of the photographic printing paper 143 shown in FIG. 14B.

Specifically, in the trimming mode shooting, the trimming information is the predetermined portion 142 of the film 141.
Is recorded in the
This information is read, and enlargement zooming is performed by the printing apparatus according to the information.

Enlargement zooming based on this trimming information is called "electronic zoom (EZ)" or "pseudo zoom", and the ratio of the diagonal length of the area specified by the electronic zoom to the diagonal length of the film is called the trimming magnification.

In the trimming, the aspect ratio of the top, bottom, left and right of the photographing area is constant, but the area C except the upper and lower parts of the film shown in FIG. 14A is the photographing area, and the area C is used for printing. There is a system capable of panoramic photography in which the image is stretched and printed on photographic paper to obtain a landscape print than in normal photography, and a method is also proposed in which panoramic information is similarly written to a predetermined portion 142 of the film together with the trimming information. Has been done.

A trimming system in which a part of the entire image forming area of the film 5 is trimmed and stretched at the time of printing, and the entire image forming area B of the film shown in FIG. The WIDE state, the TELE state when a part of the area A is the shooting range, and the MI is the state where a certain size between the areas A and B is the shooting range.
In the DDLE state, since the light flux is restricted by the field frame 17, the zoom relay lens system 14 is in the position of the solid line in the WIDE state in FIG. 2, and the light flux passes from the taking lens 1 in the range of the solid line. Further, in the TELE state, the zoom relay lens system 14 is at the position indicated by the broken line, and the light flux passes within the range indicated by the broken line. Therefore, it is indicated that the range of the solid line on the film 5 is the shooting area in the WIDE state, and the range of the broken line on the film 5 is the shooting area in the TELE state. In the MIDDLE state, the zoom relay lens system 14 is located at an intermediate position between the WIDE state and the TELE state, and is shown by a photographing range of a predetermined size (not shown).

In this embodiment, the field frame 1 for restricting the field of view.
Since 7 is not on the focusing screen 8 which is the primary image surface but on the secondary image surface, it is not necessary to change the size of the visual field regulating member corresponding to the pseudo zoom.

Further, the relay optical system (relay system auxiliary lens 12 + zoom relay lens system 14) is a reduction optical system, whereby the secondary image plane can be made smaller than the primary image plane, and The optical path can be narrowed.
Moreover, since the focal length of the eyepiece lens 19 becomes short in order to make the magnification equivalent to that of the conventional finder optical system, the overall size can be made compact.

A flash light emitting section 24 is arranged on the back surface of the third mirror 13, and a flash condenser 25 is provided.
Is provided at the position shown.

FIG. 1 shows a detailed structure of a finder device using this optical system. The finder device
The objective block 31 is composed of three blocks: a zoom block 32 and an eyepiece block 33. The objective block 31 includes a focusing screen 8, a first condenser lens 9, and a first mirror 1.
0, the second mirror 11, and the relay system auxiliary lens 12 are held. The objective block 31 has a hermetically sealed structure including the focusing screen 8, the first mirror 10, the second mirror 11, the relay system auxiliary lens 12, and the side surface of the objective block 31, and dust on the focusing screen 8 which is an image plane. To prevent adhesion. The zoom block 32 includes a third mirror 1
3, a zoom relay lens system 14, a fourth mirror 15, and a second condenser lens 16 are held.

When shooting in the trimming mode, by zooming the zoom relay lens system 14 as described above, the actually printed range can be viewed as a finder image, and at that time, the information is displayed. By recording the trimming information on the film by the recording device 26 by an optical method, a magnetic method or the like, and reading the information at the time of printing, it is possible to print under the same conditions as at the time of photographing.

The zoom relay lens system 14 comprises, in order from the object side, a first component G1 composed of a biconvex positive lens, and a second component G2 composed of a biconvex positive lens and a concave / concave negative lens. These components are respectively the lens holder 3
It is fixed to 4,35. Here, a mechanism for driving the zoom relay lens system 14 will be described with reference to FIGS.
It will be explained based on. The lens holders 34 and 35 are movable only in the front-rear direction along the guide rod 41, and the pins 42 and 43 provided on the lens holders 34 and 35 are urged by the springs 44, respectively, so that the cam surfaces are moved. Four
The position is determined by abutting on 5, and 46. The cam plate 47 having the cam surfaces 45 and 46 cut is driven by a motor 55 via gears 48, 49, 50, 51, 52, 53 and 54. The gears 52 and 54 are worm gears, and achieve high-speed deceleration compactly. In addition, the surfaces 56 and 57 on the cam plate at both ends of the zoom range are
By contacting the projections 58 and 59 provided on the zoom block 32, accurate image magnification can be achieved at both ends of the zoom range. A contact piece 60 is fixed to the lens holder 34, and the zoom position can be detected by the conduction between the contact piece 60 and the pattern on the encoder substrate 61 fixed on the body. Therefore, the image magnification can be controlled by the microcomputer as described later. 3 shows the viewfinder in the WIDE state, and FIG. 4 shows the viewfinder in the TELE state.

By the way, generally, when a mirror is used in the optical path, it becomes difficult to match the optical axes of the optical systems in front of and behind the mirror. The greater the number of mirrors, the stronger this tendency. In the present embodiment, the visual field frame 17 (FIGS. 1 and 2) is arranged at the position of the secondary image plane for the above-mentioned reason as a visual field limiting mechanism for indicating the photographing range when the user looks through the finder. However, if the optical axis shifts, the field frame 17
The shooting range indicated by is shifted on the focusing screen 8 in the direction perpendicular to the optical axis, and an incorrect shooting range is indicated.

As means for correcting the deviation of the optical axis, means for moving and adjusting the field frame 17 in the direction perpendicular to the optical axis,
There is a means for changing and adjusting the angle of any of the reflecting mirrors in the optical path from the focusing screen 8 to the field frame 17.

A switching mechanism for the panoramic mode is incorporated in the visual field frame 17 as described later, and the entire switching mechanism must be moved in order to move the visual field frame 17. Therefore, the former method of moving the field frame 17 is not appropriate.

On the other hand, the latter means for adjusting the angle of the reflecting mirror has different effects depending on which mirror is used for the adjustment. When adjusting with a reflection mirror whose optical path is close to the primary image or secondary image, the amount of movement of the optical axis that is corrected with respect to the amount of swing of the angle of the mirror is small, so that there is no deviation The amount of swing of the reflection mirror must be increased to make the adjustment. For that purpose, it is necessary to widen a gap or the like for moving the mirror. Since the relay optical system is a reduction optical system as described above, the first mirror 10 near the primary image plane has the largest size, and the amount of movement of the optical axis that is corrected with respect to the amount of swing of the mirror angle in relation to magnification Is the least.

Therefore, especially the first mirror 10 on the primary image plane side.
When adjusting with, the amount of swing of the mirror angle to correct the misalignment of the optical axis becomes large, so a large space is required for the mirror to move, and the diopter can be adjusted vertically and horizontally in the viewfinder field. But one-sided blurring is likely to occur.

Therefore, in this embodiment, the third mirror 13 in front of the zoom relay lens system 14 is adjustable. The third mirror 13 is distant from both the focusing screen 8 and the field frame 17, and the amount of swing for adjustment is small, and one-sided blurring does not easily occur. Further, the third mirror 13 is smaller in size than the other mirrors and is located above and in front of the finder optical system 3, so that adjustment is easy.

This adjustment will be described with reference to FIG. FIG. 5A shows the holder 71 of the third mirror 13. The third mirror 13 is placed in the opening 72 at the center of the holder 71.
Is fixed, and screw holes 73,
74 and 75 are provided. And this holder 71
5 is fixed on the zoom block 32 at the screw holes 73 to 75 by screws through three springs, as shown in a vertical sectional view in FIG. The springs 77 and 78 and the screws 80 and 81 correspond to the screw holes 74 and 75, respectively, and the screw hole 73 corresponds to a spring and a screw (not shown). Then, each screw is adjusted so that the optical axis of the light guided upward from the relay system auxiliary lens 12 and the optical axis of the zoom relay lens system 14 coincide with each other.

Further, in this embodiment, the objective block 31 is used.
By fixing the two reflecting mirrors to each other, the error between the two mirrors is reduced and the deviation of the optical axis is reduced. As shown in FIG. 1, the objective block 31 includes a mounting surface 31 a of the first mirror 10 and a mounting surface 31 of the second mirror 11.
have b. The objective block 31 is integrally molded, and the positional relationship between the mounting surface 31a and the mounting surface 31b is manufactured with high accuracy. Therefore, the positional relationship between the first mirror 10 and the second mirror 11 can be attached with high accuracy.

As described above, the finder device according to the present embodiment is characterized in that it has a plurality of reflecting members such as the first mirror 10 in the optical path, and among the reflecting members, the first reflecting members are arranged substantially parallel to each other. The objective block 31 that integrally holds the mirror 10 and the second mirror 11 is provided as a holding member.

FIG. 6 shows a first mirror 10 and a second mirror 11.
2 is a schematic diagram showing the optical relationship with If, for example, the entire objective block 31 moves forward while the positional relationship between the first mirror 10 and the second mirror 11 is maintained, the first mirror will move to 1
The second mirror moves to the position of 0'to the position of 11 ', respectively, but the optical axis 27 reflected by the second mirror via the first mirror does not change. In FIG. 6, the first mirror 10 and the second mirror 11 are completely parallel, but if the inclination between the two mirrors is within a few degrees, the optical axis 27 hardly changes. In this way, if the reflecting surfaces that are arranged in the order of the finder optical path and are substantially parallel to each other are held with high precision, even if the entire block holding the two reflecting surfaces is slightly misaligned due to mounting error, The feature is that there is little misalignment of the axis.

In the present embodiment, the fourth mirror 15 and the fifth mirror 15
The mirror 18 is held in another block as shown in FIG. 1, but since these mirrors are also parallel mirrors arranged in the order of the finder optical path, the fourth mirror 15 and the fifth mirror 18 are formed by one block. Even if it is held, the same effect can be obtained.

As shown in FIG. 1, the eyepiece block 33 holds a fifth mirror 18 and an eyepiece lens 19.
Since the holder 36 of the eyepiece lens 19 is fixed to the eyepiece block 33 with the washer 37 interposed therebetween, the washer 37
The diopter can be adjusted by changing the thickness of the. In FIG. 1, the structure related to the viewfinder display is omitted.

The objective block 31 is the camera body 4
(FIG. 2), the zoom block 32 is the objective block 31,
The eyepiece blocks 33 are fixed to the zoom blocks 32, respectively, and the view frame 17 and a mechanism for limiting the view exist between the zoom blocks 32 and the eyepiece blocks 33.

FIG. 7 shows a visual field limiting mechanism provided near the visual field frame 17. When shooting in panorama mode, it is desirable that the viewfinder field of view matches the print.
The vertical direction is restricted. In the standard state of FIG. 7A, the finder field is formed by the field frame 17. Edges 104, 105, 1 of the field frame 17
In order to prevent the curved lines 06 and 107 from being bent due to the distortion caused by the eyepiece lens 19 (FIG. 1), the curved lines 06 and 107 are corrected to look like a straight line during observation.

Field limiting plates 91 and 92 above and below the field frame 17, respectively.
The elongated holes 116, 117, 118, and 119 of the above are engaged with the pins 112, 113, 114, and 115, respectively, so that the field limiting plates 91 and 92 can move only in the vertical direction. In the panoramic mode, the field limiting plates 91 and 92 move to the position shown in FIG. 7B to form a viewfinder field. Edge 1 of the field limiting plates 91, 92
08 and 109 are corrected so that they look like a straight line at the time of observation by forming a predetermined curved shape like the edges 104 and 105, but as shown in FIG. 7B, the edges 104 and 105 are corrected.
Since the correction is performed at a position different from
The edges 104 and 105 are formed with curved lines having a different shape. In reality, the edges 104, 105, 106, 107, 1
08 and 109 are part of a circle with a certain radius, and 1
The radii of the curves of 08 and 109 are larger than the radii of the curves of 104 and 105.

By writing "PANORA MA" or the like on the field limiting plate 91 or 92 or both, it is possible to easily display the mode in the viewfinder. 8 (A) and 8 (B), FIG. 7 (A) and FIG.
The appearance of the finder in the state shown in (B) is shown. In both cases, the distortion is corrected and the viewfinder field is rectangular. In the panorama mode (Fig. 8 (B)), "PANORAM" is displayed outside the field of view.
“A” is displayed, indicating that the camera is in the panorama mode.

As shown in FIG. 7, the pins 94 and 95 provided on the drive lever 93 are fitted into the long holes 96 and 97 of the visual field limiting plates 91 and 92, and the visual field is generated by the rotation of the drive lever 93. The limit plates 91 and 92 move vertically. The drive lever 93 is biased counterclockwise by the spring 98, that is, in the direction of closing the visual field limiting plate.
The lever 101 comes into contact with 0 to regulate the rotational position. The operation lever 99 has a click (not shown) so that it can be stopped at positions corresponding to the standard and panorama respectively. In the panorama mode, as shown in FIG.
The positions of the visual field limiting plates 91 and 92 are oblong holes 116, 117 and 1
The ends of 18, 119 are pins 112, 113, 114, 11
5, the pin 100 on the operation lever 99 and the lever 101 are separated from each other. With this, in the panorama mode, even if the position of the operation lever 99 is not accurate, the visual field limiting plates 91 and 92 can be accurately positioned. Further, a contact piece 110 is provided on the operation lever 99 and comes into contact with the contact piece 111 in the panorama mode to generate a panorama signal.

The field-of-view limiting plates 91, 9 which are separate members from the field-of-view frame 17 at the time of normal photographing are used to limit the field of view for the panoramic mode.
As described above, the visual field regulation having different edge shapes in the panorama mode and the normal photographing can be performed by performing the procedure in 2. Regarding the stopping positions of the moving field limiting plates 91 and 92, accuracy is required only in the state of FIG. 7B which is the panoramic mode. 7A, the field limiting plates 91 and 92 are hidden by the fixed field frame 17 at the time of the standard photographing, so that the stop position accuracy is not required, and as a result, the field limiting mechanism can be easily manufactured. Become.

Note that the information recording device 26 (FIG. 2) is the same when shooting in the panorama mode as in shooting in the trimming mode.
The panorama information is written by, and the panorama print is performed by reading this information at the time of printing.

FIG. 9 shows the appearance of a camera equipped with the finder device of this embodiment. In the figure, 121 is a power switch. A viewfinder zooming mode selector switch 122 switches between a continuous mode for continuously zooming and a step mode for discretely zooming at a plurality of points (three points of tele, middle, and wide in this embodiment). 123 is a panorama mode switch, 1
Reference numerals 24 and 125 are EZ keys used during viewfinder zooming, 126 is a shutter button, and 127 is a display plate for displaying the state of the camera. The panorama mode switch 123 is the operation portion of the operation lever 99 in FIG. 7.

FIG. 10 shows a block diagram of the camera of FIG. In the figure, EZ-TELE and EZ-WIDE signals are signals generated by the EZ keys 124 and 125.
The MODE signal is a signal generated by the mode changeover switch 122, and the PANORAMA signal is a signal generated by the panorama mode switch 123. Also, ENC
ODER-TELE, ENCODER-TELE-MI
DDLE, ENCODER-MIDDLE, ENCOD
ER-WIDE-MIDDLE, ENCODER-WI
Each signal of DE is a signal generated from the encoder substrate 61 (FIGS. 3 and 4), and the zoom relay lens system 14 (FIGS. 1 and 2) is TELE, between TELE and MIDDLE, and MIDDLD.
Between E, WIDE and MIDDLE, and in each state of WIDE, a signal corresponding to the state is generated.

11 and 12 are sequence diagrams of the step mode of this embodiment. The power switch 121 of FIG.
When is turned on, the flow starts from step # 100. PAN mode and EZmem in step # 101
“Ory” is information recorded in the memory 150 of FIG. 10, and is initialized when the power switch 121 is turned on.

Next, in step # 102, the viewfinder variable magnification optical system is first set to the WIDE state. This is immediately after the power switch 121 is turned on, and it is assumed that the user performs framing so that the user looks into the finder and puts the subject to be photographed in the field of view. This is because in the WIDE state, a wider range can be seen with the finder, and the subject can be easily searched for.

The routine below step # 103 is a routine which is repeatedly executed as an endless loop when the power switch 121 is in the ON state.
When it is detected that the power switch 121 is OFF in 103, the operation for ending the loop is started. Power switch 12
When 1 is OFF, the process proceeds to step # 104, and if the state of the viewfinder variable magnification optical system is not WIDE, W
In order to enter the IDE state, the process goes through step # 102, proceeds to step # 103 and step # 104, and ends at step # 105. The WIDE state when the power switch 121 is turned off is for standby when the power switch 121 is next turned on.
This is also because framing is easy to perform even when looking through the finder before turning on the power switch 121.

In step # 106, if the taking lens 1 (FIG. 2) is not attached, a determination is made to bring it into the WIDE state. If not attached, the process goes from step # 107 to step # 102 to enter the WIDE state. If it is not attached, the process goes to step # 108 and the viewfinder variable power optical system is always kept in the WIDE state. If the taking lens 1 is not attached, it is E
To prevent the lens from being unnecessarily moved due to the operation of the Z keys 124 and 125 (FIG. 9) and the battery consumption, and to make it easier to find the subject to be photographed in the WIDE state when the next photographing lens 1 is attached. This is because

Panorama mode switch 123 shown in FIG.
When is set to the panorama mode, the field of view for the panorama mode is linked with the panorama mode switch 123.
(FIG. 7 (B)), and the PANORAMA signal (FIG. 10) is generated. In step # 108, PAN
WID finder variable-magnification optical system with ORARA signal
Set to E state. The switch 123 is turned on immediately before the end of the change of the field of view, and after the end of the change of the field of view, the viewfinder magnification is continuously changed. The end of changing the field of view and the start of changing the magnification may overlap. For example, the start of changing the field of view and the start of changing the magnification may be performed at the same time.

When the PANORAMA signal is ON, the flag PANmode indicating that the panoramic photographing is performed is set to Yes in step # 109, and the WIDE state is set through step # 102. If the PANORAMA signal is ON, the process goes to step # 110 and the viewfinder variable magnification optical system is always kept in the WIDE state. In this embodiment, in order to indicate the shooting range of panoramic shooting, it is necessary to set the field frame linked to the panorama mode switch for panorama and set the viewfinder variable magnification optical system to the WIDE state. Therefore, PANORA
When the MA signal is ON, EZ keys 124 and 125
EZ-TELE, EZ generated by pressing (Fig. 9)
-Disable the WIDE signal (Fig. 10) and always keep the viewfinder variable magnification optical system in the WIDE state.

When the panorama mode switch is in the standard state, the field frame is as in the standard photographing as shown in FIG. 7 (A), and the PANORAMA signal is OFF,
The process proceeds from step # 108 to step # 110. PAN
When the ORAMA signal is ON, step # 109
After the PAN mode is set to Yes, PANORAM
When the signal A is turned off and the process goes to step # 110, the determination is Yes. At this time, step # 11
1. In step # 113, the lens is moved to the MIDDLE or TELE state depending on the contents recorded in the EZmemory. EZmemory is
The state of the viewfinder variable magnification optical system immediately before the PANORAMA signal is turned on is stored, and the panorama mode switch 123 is set to the panorama state. Further, when the standard state is set thereafter, the state immediately before the panorama mode switch 123 is set to the panorama mode can be restored. Thereby, for example, when selecting whether to shoot in the TELE state or the panoramic shooting state, the panorama mode switch 123 is set to the panorama mode, the field frame is switched to the panorama, and the PAN is set.
The finder variable-magnification optical system is TELed by the ORAMA signal.
By changing the state from E to the state of WIDE, it is possible to show the correct panorama shooting range. Then, when the panorama mode switch 123 is set to the standard state next time, the field frame is switched to the standard state and the viewfinder variable magnification optical system immediately returns to the TELE state without pressing the EZ key.

Steps # 116 to # 118 are a routine for moving the viewfinder variable magnification optical system to the TELE state when the autofocus device is switched from the autofocus state (AF) to the manual focus state (MF). .. When the user switches to the manual focus state, the user manually adjusts the focus while looking at the subject in the viewfinder, so the viewfinder magnification is high, and the TELE state is set so that the focus can be adjusted more accurately. The routine below step # 119 is E in FIG.
This is a routine for switching the viewfinder variable magnification optical system according to the EZ-TELE and EZ-WIDE signals generated when any one of the Z keys 124 and 125 is pressed. EZ-
In case of TELE signal, if the viewfinder variable magnification optical system is MIDDLE, go to TELE, if it is WIDE, MIDDLE
It is switched to E and does not change in the TELE state. EZ-W
With the IDE signal, the state of the viewfinder variable magnification optical system is TE
If it is LE, it switches to MIDDLE, and if it is MIDDLE, it switches to WIDE. If it is in WIDE state, it does not change. Step # 1
After changing the state of the viewfinder variable magnification optical system in 19 to # 130, the process returns to step # 103 and the same routine is repeated.

MoveWIDE, M in FIGS. 11 and 12
oveMIDDLE and MoveTELE are finder variable magnification optical systems WIDE, MIDDLE and TE, respectively.
This is a routine for moving the lens to LE.

As an example, FIG. 13 shows MoveMIDDLE.
Shows the routine of. The encoder board 61 for detecting the lens position shown in FIGS. 3 and 4 has a lens position of WIDE.
(Generate ENCODER-WIDE signal), MIDDLE
(Generate ENCODER-MIDDLE signal), TELE
Position (generate ENCODER-TELE signal) or between WIDE and MIDDLE (ENCODE
R-WIDE-MIDLE signal is generated), between TELE and MIDDLE (ENCODER-TELE-MI
The position of generating the DDLE signal) is detected. M
The oveMIDDLE routine returns E in step # 151.
If the NCODER-MIDDLE signal is generated, it is not necessary to move the lens, so stop the driver 155 and the motor 55 (Fig. 10) for moving the lens.
(# 152), the routine ends (# 153).

Step # 154 or Step # 155
, ENCODER-TELE signal or ENCODE
The lens is TE by the R-TELE-MIDDLE signal.
When it is detected that it is between the LE position or between TELE and WIDE, the lens is moved in the WIDE direction in step # 156, and the ENCODER-MIDDL is executed in step # 151.
This is repeated until the E signal is detected.

E in step # 157 and step # 158
NCODER-WIDE signal or ENCODER-WID
Depending on the E-TELE signal, the lens is in the WIDE position or W
When it is detected that it is between IDE and MIDDLE, the lens is moved in the TELE direction, and step # 151.
This is repeated until ENCODER-MIDDLE is detected at.

[0055]

As described above, according to the finder device of the present invention, the finder device has a plurality of reflecting members in the optical path, and two of the plurality of reflecting members are arranged substantially parallel to each other. Since the holding member that holds the reflecting member integrally is provided, relative positioning between the two reflecting members can be performed with high accuracy, and
It is possible to realize a finder device in which the optical axis does not shift even if the entire holding member shifts due to an attachment error or the like.

[Brief description of drawings]

FIG. 1 is a sectional view showing the structure of an embodiment of the present invention.

FIG. 2 is a sectional view showing a state in which an embodiment of the present invention is applied to a single-lens reflex camera.

FIG. 3 is a diagram for explaining how to drive a zoom relay lens system used in an embodiment of the present invention.

FIG. 4 is a diagram for explaining driving of a zoom relay lens system used in an embodiment of the present invention.

FIG. 5 is a diagram for explaining adjustment of the third mirror used in the embodiment of the present invention.

FIG. 6 is a diagram for explaining the relationship between the first mirror and the second mirror and the optical axis in the embodiment of the present invention.

FIG. 7 is a diagram for explaining a mechanism for limiting a visual field in the embodiment of the present invention.

FIG. 8 is a diagram showing the appearance of a finder that changes depending on the mechanism for limiting the visual field in the embodiment of the present invention.

FIG. 9 is a plan view showing the outer appearance of a single-lens reflex camera to which an embodiment of the present invention has been applied.

FIG. 10 is a block diagram showing a schematic configuration of an embodiment of the present invention.

FIG. 11 is a flowchart showing a sequence in a step mode according to the embodiment of the present invention.

FIG. 12 is a flowchart showing a sequence in step mode according to the embodiment of the present invention.

FIG. 13 is a flowchart showing a MoveMIDDLE routine in the flowcharts of the embodiments of the present invention shown in FIGS. 11 and 12;

FIG. 14 is a diagram for explaining a trimming system.

[Explanation of symbols]

 1 ... Shooting lens 2 ... Main mirror 3 ... Viewfinder optical system 4 ... Camera body 5 ... Film 6 ... AF sub-mirror 7 ... AF module 8 ... Focus plate 9 ... First condenser lens 10 ... First mirror 11 ... Second mirror 12 ... Relay system auxiliary lens 13 ... Third mirror 14 ... Zoom relay lens system 15 ... Fourth mirror 16 ... Second condenser lens 17 ... Field of view frame 18 ... Fifth mirror 19 ... Eyepiece 20 ... LCD 21 ... Infinder submirror 22 ... In Finder prism 23 ... Pupil position 24 ... Flash light emitting unit 25 ... Flash condenser 26 ... Information recording device (information writing device) 27 ... Optical axis 31 ... Objective block 31a, 31b ... Mounting surface 32 ... Zoom block 33 ... Eyepiece block 34, 35 ... Lens holder 36 ... Hol Da 37 ... Washer 41 ... Guide rod 42, 43 ... Pin 44 ... Spring 45, 46 ... Cam surface 47 ... Cam plates 48-54 ... Gear 55 ... Motor 56, 57 ... Cam plate surface 58, 59 ... Projection 60 ... Contact piece 61 ... Encoder board 71 ... Holder 72 ... Openings 73 to 75 ... Screw holes 77, 78 ... Spring 80, 81 ... Screws 91, 92 ... Field limiting plate 93 ... Drive lever 94, 95 ... Pins 96, 97 ... Long Hole 98 ... Spring 99 ... Drive lever 100 ... Pin 101 ... Lever 104-109 ... Edge 111 ... Contact piece 112-115 ... Pin 116-119 ... Oblong hole 121 ... Power switch 122 ... Mode change switch 123 ... Panorama mode switch 124, 125 ... EZ key 126 ... Shutter button 127 ... Display plate 141 ... Film 142 ... Milk Predetermined portion of the surface 143 ... printing paper 150 ... memory 155 ... driver

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Makoto Ando 2-3-13 Azuchi-cho, Chuo-ku, Osaka, Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Ken Yano 2-chome, Azuchi-cho, Chuo-ku, Osaka No. 13 Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Akira Funabashi 2-33 Azuchicho, Chuo-ku, Osaka City Osaka International Building Minolta Camera Co., Ltd.

Claims (1)

[Claims] 1. A finder device having a plurality of reflecting members in an optical path, comprising: a holding member for integrally holding two reflecting members arranged substantially parallel to each other among the plurality of reflecting members. Characteristic finder device.