KR100228831B1 - Stereo camera - Google Patents

Abstract

An object of the present invention is to provide a stereo camera having an automatic quadrature correction function and having good operability for viewing the left and right screens with one finder. The left and right photographing lenses 4L and 4R are linearly obliquely moved by the optical axis distance / focus adjustment interlock mechanism, and are corrected to the distance between the optical axes suitable for the focal length. The composite prism 5, which inverts the outer half of each of the left and right photographic lenses and synthesizes one screen, is moved back and forth in conjunction with the focusing adjustment by the prism moving cam 16, regardless of the distance between the optical axes. Place the focal point on the center extension of the stereo camera in the center of the viewfinder screen. In response to the focus adjustment, the width of the subject image changes, and the image can be accurately focused by looking at the shape of the image.

Description

Stereo camera

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereo camera, and more particularly, to a stereo camera having a prism finder for synthesizing one screen by 1/2 of the photographed screens of the left and right lenses.

In stereo camera which put two photographing lenses together in one camera body, reflex type stereo camera which sees screen of each of right and left photography lenses by right and left separate pentaprism finder, one rangefinder type or real type expression ) You can see the depth of field by the finder.

인 것이 알려져 있다)을 넘는 스테레오 카메라에 있어서는, 2개의 파인더를 동시에 들여다 보는 것이 곤란하다.Although the reflex type stereo camera has the advantage of seeing a real shot image through a shooting lens, the structure of viewing two finders simultaneously with both eyes is hardly said to be more operable than the structure of viewing one finder with one eye. In particular, the left and right finder pitches are spaced between the human eyes due to limitations in the dimensions of the lens and the dimensions of the lens mount mechanism.

It is difficult to look at two finders at the same time in a stereo camera more than).

In addition, in a conventional stereo camera having fixed left and right lens intervals, non-redundant areas are generated on the outer sides of the left and right screens due to the difference in the depth of field of the left and right lenses, and at the time of mounting the overlapped area where a stereo effect is not obtained. The problem is that the screen loss is large because it needs to be masked.

Therefore, the applicant of the present application enters a composite prism by injecting the outer half (inner half on the film exposure surface) of each of the left and right photographic lenses into a composite prism, and synthesizes one screen with one finder. In the stereo camera that can be seen, the distance adjustment mechanism between the optical axis of the lens linked with the focusing mechanism is provided, and the stereo camera which controls the loss of the screen by always matching the depth of field of the left and right lenses at the focal length. (Japanese Patent Application No. Hei 8-053476).

Since this stereo camera has the same left and right depth of field at the focal length, the focus can be adjusted while observing the horizontal shift of the left and right half of the image of the finder screen synthesized into 1/2 of the left and right depth of field. When there is no misalignment on the subject that spans the left and right half of the screen, and when one normal image is obtained, the subject is in focus.

In FIG. 19, when (a) shows a circular subject, (b), (c), (d) shows a finder image of the stereo camera, and (a) shows the subject in the center of the finder screen, If the subject is in focus, the subject looks like an actual shape as shown in (b). If the subject is farther than the focusing distance, the object looks wider as shown in (c). If the subject is closer than the focusing distance, it is narrower as shown in (d). The focus can be adjusted by looking at the lateral shift of the image.

However, in reality, almost all the subjects in the screen are not located at the focal length, and many subjects are often mixed before and after the focal length. Therefore, when a subject is focused, the subject is closer to the subject in the same screen. Is taken in a state where the distance correction between the optical axes of the lens is insufficient. Since human eyes have a collimation effect of paying attention to a near subject, a stereo slide having multiple distances of subjects mixed with an image of a near subject rather than a subject at a confocal distance when viewed with a viewer. It may appear unnatural, and in order to correct this unnaturalness, it is necessary to properly mask the outer region of the left and right screens at the time of mounting.

Therefore, in other than close-up photography and near-field shots where no other subject exists between the main subject and the lens, it can be said that it is effective to suppress the screen loss if the left and right lenses are arranged so that the depth-of-field ranges match at the near distance rather than the focal length. have.

, 좌우의 노광면 피치가 66

인 조건의 경우의 지수곡선(A)을 제21도에 나타낸다.The exponential curve A shown by the dotted line in FIG. 20 represents the distance between the optical axes and the focusing control trajectory of the principal point of the left and right lenses, in which the depth of field of the left and right lenses always coincide in the focal length, and the focal length of the lens is 36

Left and right exposure surface pitch is 66

The exponential curve A in the case of phosphorus conditions is shown in FIG.

Here, assume that the lens is one thin lens,

fFocal Length of the Lens

f

LDistance from the subject to the pub of the lens

L

ifDistance from the focal point of the lens to the imaging position

if

if=f²/(L-f)이므로, 렌즈의 주름과 필름면과의 거리는 f+

if가 된다.Speaking of

Because if = f ² / (Lf), the distance between the wrinkle of the lens and the film surface is f +

is an if.

In addition, if the shift amount S1 of each of the left and right lenses for matching the shooting range from left to right is P ₁ , the pitch of the left and right exposure surfaces of the stereo camera is P ₁ ,

if)/(L+f+

if)S1 = (P1 / 2) × (f +

if) / (L + f +

if)

As the distance L from the subject to the main point of the lens decreases, the left and right lenses may be moved toward each other by the shift amount S1 calculated from the above equation, and the exponential curve A is the trajectory based on the above formula. .

In Fig. 21, the straight line B is the point where the left and right lenses are shifted inward from the exponential curve A at the infinite focal point position F ₁ , and the depth of field of the left and right lenses is shown at the shortest focal point position Fs. It is a straight line connecting the coincident points, and except for the shortest focal point position Fs, the depth of field of the left and right lenses is closer than the focal length. If the left and right lenses are moved along a line segment having a larger inner shift amount in the straight line B or the entire range of the focusing range, a perspective that is suitable for an actual shooting situation in which a different subject exists nearer than a subject at a focal length. The calibration result is obtained.

However, when the above-mentioned linearly movable optical axis-to-axis distance / focus adjusting mechanism is mounted on a stereo camera which combines one finder screen by the outer half of each of the left and right photographed screens described above, the shortest distance focal position Fs (straight line B ), Or in all focal ranges (in the case of a line segment with a large inner shift amount from the straight line B), the left and right lenses are shifted inward more than the position where the depth-of-field range coincides at the focal length, so that the subject screen at the focal length is focused. In spite of this, it appears wide as shown in Fig. 19 (c). Therefore, there arises a problem that it becomes impossible to focus on the subject while watching the deviation of the finder image.

Thus, the left and right shots can be viewed by one finder, and the stereo-to-optic distance / focus adjustment mechanism of the distance between the optical axes suitable for actual shooting conditions is provided, and the stereo can be precisely adjusted by the finder image. Since the technical problem to be solved arises in order to provide a camera, this invention aims at solving the said subject.

이격하는 방향으로 슬라이드가능하게 설치하여 프리즘 이동기구를 개장(介裝)하고, 상기 프리즘 이동기구와 광축간 거리/초점조절기구와의 연동기구를 설치하고, 상기 좌우의 촬영렌즈의 광축의 중간을 지나며, 상기 좌우 2개의 광축과 평행한 선상의 합초거리점이 항상 상기 프리즘 파인더의 화면의 좌우중심에 위치하도록 상기 광축간 거리/초점조절/프리즘 이동 연동기구를 구성한 것을 특징으로 하는 스테레오 카메라를 제공하는 것이다.The present invention proposes to achieve the above object, and is a stereo camera in which the optical systems of two single-eye reflex cameras are arranged in parallel on one camera body, each of which has an outer half of the left and right photographic lenses. Inter-axis distance / focus adjustment mechanism that includes a prism-type finder that combines one screen, and tilts the left and right photographing lenses along a line connecting the infinite focus position and the shortest distance focus position, which is further reduced. In a stereo camera which automatically corrects parallax, the left and right half of the finder image approaches the prism.

The prism moving mechanism is remodeled to be slidable in a spaced apart direction, and a linkage mechanism between the prism moving mechanism and the optical axis distance / focus adjusting mechanism is installed, and the middle of the optical axis of the left and right photographing lenses is provided. Passing, and the distance between the optical axis, the focus adjustment / prism movement linkage mechanism is configured so that the confocal distance line in parallel with the two left and right optical axis is always located in the left and right center of the screen of the prism finder. will be.

이격하는 방향으로 슬라이드가능하게 장착하여 상기 프리즘 이동기구를 개장한 것을 특징으로 하는 스테레오 카메라를 제공하는 것이다.Further, the prism-type finder is constituted by a plurality of prisms or a combination of prism and mirror, and the prism or mirror which combines the left and right 1/2 screens into one screen approaches the left and right half of the finder image.

The present invention provides a stereo camera, wherein the prism movement mechanism is retrofitted by slidably mounted in a spaced direction.

1 is a front view of a stereo camera showing an embodiment of the invention described in claim 1.

2 is a cross-sectional view of the stereo camera of FIG.

3 is a perspective view of the prism of the stereo camera of FIG.

4 shows the prism of FIG. 3, wherein (a) is a plan view, (b) is a front view, (c) is a bottom view, (d) is a rear view, and (e) is a line along AA in (b) Cross-section.

5 is a cross-sectional view of the lens shift cam mechanism in the stereo camera shown in FIG.

Fig. 6 shows a conventional example and is an explanatory diagram showing the relationship between a fixed prism and a finder screen.

7 is an explanatory diagram showing the relationship between the slide-type prism and the finder screen of FIG.

8 is a front view of a stereo camera, showing an embodiment of the invention described in claim 2 of the claims.

9 is a perspective view of a prism unit of the stereo camera of FIG.

FIG. 10 shows the prism unit of FIG. 9, wherein (a) is a plan view, (b) is a plan view, (c) is a front view, (d) is a bottom view, and (e) is a view along line AA of (b) (F) is a side view.

(A) is a top view of the center prism of FIG. 9, (b) is a sectional side view of the slide mechanism of a center prism.

FIG. 12 is an explanatory diagram for explaining the relationship between the prism unit and the finder screen of FIG. 8; FIG.

13 is a perspective view showing another embodiment of the prism unit.

14 is a perspective view showing another embodiment of the prism unit.

FIG. 15 shows the prism unit of FIG. 14, where (a) is a plan view, (b) is a front view, (c) is a bottom view, (d) is a rear view, and (e) is a line AA of (b) Sectional drawing, (f) is a side view.

(A) is a front view of the center prism of FIG. 14, (b) is a side cross-sectional view of the thalid mechanism of a center prism.

FIG. 17 is an explanatory diagram for explaining the relationship between the prism unit and the finder screen of FIG.

18 is a perspective view showing another embodiment of the prism unit.

19 (a) is an explanatory view showing a subject, and (b), (c), and (d) are viewfinder screens of a stereo camera having an optical axis distance / focus control linkage mechanism.

Fig. 20 is an explanatory diagram showing the distance between the optical axes / focal adjustment trajectories in which the depth of field of the left and right lenses always matches at the focal length in the stereo camera.

21 is an explanatory graph showing the trajectory of the main points of the left and right lenses, where A represents the exponential curve trajectory in which the depth of field of the left and right lenses always coincide at the focal length, and B is a linear trajectory with more shift amount.

* Explanation of symbols for main parts of the drawings

1: stereo camera 2: camera body

3L, 3R: lens board 4L, 4R: shooting lens

5: prism 6: eyepiece

7L, 7R: Reflex Mirror 8: 180 degree reflective prism

9L, 9R: 90 degree reflective prism section 10L, 10R: pivot

11L, 11R: Slide Guide 12: Center Slide Guide

13L, 13R: Guide Arm 14: Camshaft

15: guide arm 16: prism moving cam

17: Involute Cam 18: Knob

40: compression spring 41: cam shaft

42: prism movement cam 43: lever

44: triangular mirror 51: prism unit

52: fixed prism 53: center prism

54L, 54R: 90 degree reflective prism 55L, 55R: focus plate

56: slide guide 57: compression spring

58: cam shaft 59: prism moving cam

60: lever 61: tappet rod

62L, 62R: shooting lens 63: triangle mirror

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described in detail according to drawing. 1 and 2 show a stereo camera 1, photographing lenses 4L and 4R are provided on the left lens board 3L and the right lens board 3R on the front of the camera body 2, respectively. The prism 5 is arranged in the left and right centers of the body 2. The finder mechanism is constituted by the eyepiece 6, the prism 5 and the vertical reflex mirrors 7L and 7R disposed on the left and right of the prism 5.

As shown in FIG. 3 and FIG. 4, the prism 5 is formed integrally from the optical resin or the optical glass, and the 180 degree reflective prism portion 8 for displacing the light paths of incident light and reflected light up and down in parallel. Each of the left and right half of the lower incident surface of the cross-section) is formed by joining the 90 degree reflective prism portions 9L and 9R in the lateral direction. The vertical planes facing the outer lateral direction of the 90 degree reflective prism portions 9L and 9R are incident surfaces, and the overall width of the prism 5 is equal to or slightly wider than the width of the exposure screen of the stereo camera 1.

As shown in FIG. 2, the reflex mirrors 7L and 7R disposed on the left and right sides of the prism 5 rotate in the horizontal direction with the pivots 10L and 10R as their rotation centers, and at the time of imaging, It rotates in the lateral direction of the prism 5 from the standby position and retreats from the optical path between the lenses 4L and 4R and the film surface.

As shown in FIG. 3, when the reflex mirrors 7L and 7R are in the opposing position, the screens of the outer half (inner half of the exposure surface) of the photographing range of the left and right lenses are displayed in the reflex mirror ( They are inverted left and right by 7L and 7R and are incident on the 90 degree reflective prism portions 9L and 9R of the prism 5. Then, total reflection is performed three times by the reflecting surfaces RP1 of the 90 degree reflecting prism portions 9L and 9R and the reflecting surfaces RP2 and RP3 of the 180 degree reflecting prism portion 8, and the 180 degree reflecting prism portion 8 is provided. Image synthesized by the upper right image of the outer half of the photographing range of the left lens and the upper right image of the inner half of the photographing range of the right lens on the image projection surface 8a of the lens. ) Appears. In addition, when the mat surface is applied to the incidence surfaces of the 90 degree reflective prism portions 9L and 9R of the prism 5 to form a focal plane, the focus adjustment can be performed by observing the actual image formed on the focal plane. have.

As shown in FIG. 2, the prism 5 and the left and right lens boards 3L and 3R are coupled to the tiltable slide guides 11L and 11R formed on the front surface of the camera body 2, and the prism 5 is It is mounted on the center slide guide 12 and can move forward and backward. The slide guides 11L and 11R of the lens board have the trajectory of the main points of the photographing lenses 4L and 4R to be a straight line B shown in FIG. It is shaped.

Guide arms 13L and 13R extending rearward from the left and right lens boards 3L and 3R are coupled to the cam shaft 14 arranged in the left and right directions in the camera body 2. In addition, the prism 5 of the cam shaft 14 is provided with a guide arm 15 mounted on the bottom of the prism 5 by pushing the prism 5 to the rear (downward in FIG. 2) by a spring (not shown). It is pressed against 16.

5 shows the guide arm 13 and the cam shaft 14 of the lens board, and the groove of the rectangular cross section in which the involute cam 17 of the cam shaft 14 is formed in the guide arm 13 ( 13a), and the clearance between the involute cam 16 and the groove 13a of the rectangular cross section is as small as possible to eliminate backlash, thereby enabling very precise focusing.

By rotating the knob 18 provided at one end of the camshaft 14 shown in FIG. 2 with a finger, the left and right lens boards 3L and 3R incline back and forth, and move forward or backward in the approaching direction. In addition, the prism 5 also moves back and forth in response to the rotation of the cam shaft 14 similarly to the lens boards 3L and 3R.

The cam mechanism of the prism 5 passes through the left and right centers of the prism 5 at all positions on the linear trajectory B of the principal point of the lens shown in FIG. 21, and the optical axes of the two left and right photographing lenses 4L and 4R. The prism 5 is formed so as to move back and forth in synchronism with the photographing lenses 3L and 3R so that the point at the confocal distance on the line parallel to the line is always located at the left and right center of the screen of the finder. When the 3R) is advanced in the near focal direction, the prism 5 also moves forward in conjunction.

In addition, although illustration is abbreviate | omitted, the cam mechanism of a lens board and a prism can apply various forms, and is not limited to the said form.

Next, the relationship between the position of the prism 5 and the finder screen will be described. 6 is an explanatory diagram of a conventional prism fixed stereo camera, and FIG. 7 is an explanatory diagram of the stereo camera of the present invention.

As shown in FIG. 6, the image of the subject on the extension line passing through the left and right centers of the stereo camera is directed through the left and right photographing lenses 21L and 21R to the left and right centers of the respective exposure surfaces 22L and 22R, and is a reflex mirror. It is deflected by 23L and 23R and enters the incident surface of the side surface of the prism 24. The prism 24 is disposed at a position where the centers of the left and right screens coincide with each other at the center apex of the left and right 90 degree reflective prisms 25L and 25R. The photographing lenses 21L and 21R always move along the exponential curve A in which the left and right depth-of-field ranges always coincide in the focus adjustment range shown in FIG. Therefore, in the entire range of the positions of the photographing lenses 21L and 21R from the shortest photographing position to the infinity position, the subject at the focal length is located at the same position on the left and right screens, and as shown in FIG. You can focus by viewing the misalignment.

On the other hand, since the stereo camera 1 of the present invention linearly shifts the photographing lenses 4L and 4R, as shown in FIG. 7, when the linear B is moved, positions other than the shortest photographing distance are included. In the subject, the focal length is shifted inward on the exposure surface. Therefore, as shown in the same drawing, light from an object at infinity while focusing at infinity passes through the center of the photographing lenses 4L and 4R in parallel with the optical axis, and as shown by a solid line, a reflex mirror Although the light reflected by 7L and 7R and incident on the prism 5 are displaced to the rear (downward in the drawing) more than the case of focusing at a short distance, the prism 5 is photographed by the cam mechanism 4L and 4R. Retreat in conjunction with). The cam mechanism retracts the prism 5 to be equal to the amount of rearward displacement of the optical path, and the image of the confocal distance point on the extension line passing through the center of the stereo camera is irrespective of the left and right 90 degree reflective prism portions 9L and 9R regardless of the amount of lens export. Is coincided at the intersection of the center vertices, and as shown in FIG. 19 (b), it is viewed as one complete screen and can be focused by seeing the positional shift of the finder image as in the conventional stereo camera.

8 shows another embodiment, wherein the optical axis distance / focus adjusting mechanism of the stereo camera 31 has the same configuration as the stereo camera 1 of FIG. 2, and includes the lens boards 32L and 32R and the photographing lens 33L. , 33R is tilted along a straight line B, but the reflex mirrors 34L and 34R have a structure that rotates in a vertical direction with the rear portion as a normal single-lens reflex camera, and the left and right reflex mirrors ( The light reflected upward from 34L and 34R is incident on the prism unit 35 in the camera body.

The prism unit 35 is constituted by three prisms 36, 37L, and 37R, as shown in FIG. 9 and FIG. 10, and the central prism 36 has two 90 degree reflective prisms in plane M. As shown in FIG. It is a shape joined by a die, and it moves back and forth by the slide mechanism mentioned later. The prisms 37L and 37R disposed on the left and right of the center prism 36 are symmetrical, and are formed by joining two 90 degree radiating prisms rotated 90 degrees to each other. The overall width of the prism unit 35 is equal to or slightly wider than the pitch of the left and right optical path surfaces of the stereo camera 31, and the overall width of the center prism 36 is also equal to or slightly wider than the width of one screen.

The left and right prisms 37L and 37R are disposed on the left and right focus plates 38L and 38R, with the incidence surfaces of the lower surfaces facing the inner half regions of the focus plates 38L and 38R, and the focus plates 38L and 38R. The incident light passing through the beam is deflected toward the center to enter the side surface of the central prism 36. As shown in FIG. 9, the light beams incident from the lower side to the left and right prisms 37L and 37R are totally reflected three times to be rearward from the projection surface 36a of the center prism 36 (the front direction of the paper in the drawing). Comes out horizontally. In addition, you may abbreviate | omit the focusing plates 38L and 38R by making the lower surface of left and right prism 37L, 37R the focal plane of opaque glass shape.

The inverted left and right inverted images passing through the photographing lenses 33L and 33R are inverted up and down by the reflex mirrors 34L and 34R, and the images formed on the focus plates 38L and 38R are upright, left and right inverted images. Screens of the inner half of the focus plates 38L and 38R, that is, the outer half of each of the depth-of-field of the left and right photographing lenses 33L and 33R, are symmetrically reversed left and right by the central prism 36. Therefore, an upright half of the outside of the shooting range of the left photographing lens 33L is projected on the left half of the projection surface 36a of the center prism 36, and the right half of the projection surface 36a is projected. An upright image of the outer half of the photographing range of the right lens 33R is projected onto one screen to synthesize one screen.

11 shows the slide mechanism of the center prism 36, which is mounted on the slide guide 38 and pushed forward by the compression spring 40 (right side in the drawing). The cam shaft 41 is provided with a prism movement cam 42 on the same axis as the focal / optical axis distance adjustment cam (not shown) similar to the stereo camera 1 shown in FIG. 42 and the central prism 36 are connected via a lever 43.

Contrary to the stereo camera 1 shown in FIG. 2, the center prism 36 moves in the opposite direction to the forward and backward movement of the photographing lens by the rotational operation of the knob of the distance / focus adjustment mechanism between the optical axes. As shown, the image of the subject at the focal length of the extension line passing through the center of the stereo camera irrespective of the position of the photographing lenses 33L and 33R is the center vertex of the 90 degree reflective prism portion on the left and right of the center prism 36. In this case, as shown in Fig. 19 (b), it is shown as one complete screen, and focus adjustment by position shift of the finder image is possible.

FIG. 13 shows another embodiment of the prism unit shown in FIG. 9, in which a triangular mirror 44 having the same function as the central prism is disposed in place of the central prism 36, and the mirror 44 is placed in FIG. It is possible to adjust the focus by shifting the position of the finder image as shown in FIG. 12 by moving back and forth by the slide mechanism interlocked with the optical axis distance / focus adjusting mechanism shown in FIG.

14 and 15 show another embodiment of the prism unit, in which the prism unit 51 is constituted by a fixed prism 52 and an upper center prism 53 that slides up and down, as shown in FIG. Similar to the prism unit 35, the optical configuration is such that the light is totally reflected 90 degrees three times.

The fixed prism 52 is a shape in which symmetrical trapezoidal 90 degree reflective prism portions 54L and 54R are connected to the left and right sides of the central lower 90 degree reflective prism portion 54C, and the central prism 53 is a 90 degree reflective prism. Is a front M-shaped prism connected in parallel. The central prism 53 is inserted into the gap between the upper and lower trapezoidal 90 degree reflective prism portions 54L and 54R on the left and right of the fixed prism 52 and slides up and down.

As shown in Fig. 14, the left and right trapezoidal 90 degree reflective prism portions 54L and 54R of the fixed prism 52 provided on the focusing plates 55L and 55R are disposed on the left and right focusing plates 55L and 55R. Images of the inner 1/2 are incident and totally reflected three times by the reflecting surfaces RP1, RP2, and RP3, and synthesized into one screen by the left and right half-by-left screens on the vertical projection surface 52a in the lower center. Upright projection is projected.

FIG. 16 shows the slide mechanism of the center prism 53. The center prism 53 is mounted on the slide guide 56 and pushed downward by the compression spring 57. As shown in FIG. Similarly to the prism slide mechanism shown in FIG. 11, the cam shaft 58 is provided with a prism movement cam 59 on the same axis as the focus / optical axis distance adjustment cam (not shown), and the prism movement cam 59 The upper and upper central prisms 53 are connected via a lever 60 and a tappet lod 61.

The center prism 53 slides in the vertical direction with respect to the front-rear movement of the photographing lens by the rotation operation of the knob of the distance between the optical axes / focusing mechanism, and as shown in FIG. 17, the photographing lenses 62L and 62R are shortest. It moves from the lower position at the time of advancing to the shooting distance from the ascending position at the time of infinity photography. The image of the subject at the focal length on the extension line passing through the center of the stereo camera coincides at the center apex of the 90 degree reflective prism portions left and right of the upper center prism 53 irrespective of the position of the lens. It is shown as shown in Fig. 19, and if the focus is shifted, it is shown as 19th (c) and (d), and the focus can be adjusted by shifting the position of the finder image.

FIG. 18 is a triangular mirror 63 having the same function as the upper center prism 53 instead of the upper center prism 53 of the prism unit 51 shown in FIG. 14. FIG. The slide mechanism shown in Fig. 1 moves up and down in association with the distance / focus adjustment between the optical axes, and focus adjustment can be performed by shifting the position of the finder image as shown in FIG.

As described above, in the stereo camera of the present invention, a prism for synthesizing one finder screen by the outer half of the left and right photographing screens is moved in conjunction with the distance / focus adjusting mechanism between the optical axes to automatically correct the parallax. The focal length point in the middle of the optical axis of the left and right photographing lenses is always positioned at the left and right centers of the finder screen. Therefore, the subject at the focal length is seen as the actual state on the finder screen regardless of the setting of the distance between the optical axes for the focal length, and can be focused according to the state of the subject image. Therefore, it is possible to provide a stereo camera having high performance and good operability which eliminates the imperfection of parallax correction and the difficulty of focusing, which are disadvantages of the conventional stereo camera.

In addition, this invention is not limited to said embodiment, A various change is possible within the technical scope of this invention, and it is natural that this invention affects the changed.

Claims (2)

A stereo camera in which the optical systems of two single-eye reflex cameras are arranged in parallel on a single camera body, including a prism-type finder that combines one screen by the outer half of each of the left and right photographic lenses. In a stereo camera which automatically corrects parallax by installing an optical axis distance / focus control mechanism for tilting a photographic lens along a line connecting an infinite focal position and a shortest focal position with a smaller optical distance. The prism of the finder approaches the left and right half of the finder image.

The prism moving mechanism is remodeled to the prism, and a linkage mechanism between the prism moving mechanism and the optical axis distance / focus adjusting mechanism is installed to the prism, and the left and right photographing lenses The inter-axis distance / focus control / prism movement interlock mechanism is configured so that the line focus distance parallel to the two right and left optical axes is always located at the left and right center of the screen of the prism finder passing through the middle of the optical axis. A stereo camera characterized by. The prism or mirror according to claim 1, wherein the prism-type finder is constituted by a plurality of prisms or a combination of a prism and a mirror, and the left and right half of the finder image includes a prism or a mirror that combines the left and right half screens into one screen. Access

A stereo camera, wherein the prism movement mechanism is retrofitted by slidably mounted in a spaced direction.

Images