JPH05173265A - Stereo camera - Google Patents

Abstract

PURPOSE:To cause matching of exposure amounts of object light on both right and left sides with each other by a method wherein a finder and a stroboscope are prevented from being kicked when a stereo adapter is integrally formed in front of a camera body part where the finder and the stroboscope are laterally displaced from a photograph lens. CONSTITUTION:A stereo camera is provided with a camera body part 10 wherein a finder and a stroboscope 18 are arranged in a position laterally displaced from a photograph lens 16 and a stereo adapter 20 integrally attached to the front face of the camera body part 10. The stereo camera comprises the stereo adapter 20 having one-eyed optical systems 21 and 22 through which object light is caused to enter directly to the first lens part on the finder side or the stroboscope 18 side of first and second lens parts into which the photograph lens is equally divided by the longitudinal section passing the optical axis of the photograph lens 16 and object light laterally displaced from the aforesaid object light by a given distance is guided to the second lens part, and a means by which an amount of object light passing through the first lens part is decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereo camera,
In particular, it relates to a stereo camera in which a stereo adapter is integrally attached to the camera body.

[0002]

2. Description of the Related Art Generally, when taking a stereo picture with a conventional camera, a stereo adapter is attached to the front part of a taking lens. The stereo adapter has four mirrors, and separates the image incident on the lens optical path into right and left and forms an image on the left and right of one frame. In addition, various stereo cameras for stereo photography, which are formed by integrally fixing a stereo adapter on the front surface of the camera, have been proposed.

[0003]

By the way, in the case of a stereo camera in which a stereo adapter is fixed on the front surface of the camera, the light incident on the viewfinder and the light emitted from the strobe will not be an obstacle, that is, a hurt will occur. You need to configure the stereo adapter so that it does not occur. However, in order to avoid eclipse, there is a case where there is no space for disposing the two mirrors as one of the left and right optical systems of the stereo adapter.

If the left and right optical systems of the stereo adapter are made symmetrical and the stereo adapter is constructed so as not to be shaken, the size of the stereo adapter becomes smaller, and as a result, it is impossible to take a stereoscopic photograph having a stereoscopic effect. The problem arises. The present invention has been made in view of the above circumstances. When a stereo camera is configured by integrating a stereo adapter on the front surface of a camera body in which a viewfinder and a strobe are laterally displaced from a photographing lens. In addition, it is an object of the present invention to provide a stereo camera which can prevent the finder and the strobe from being shaken and can make the exposure amounts of the left and right subject light beams coincide with each other.

[0005]

In order to achieve the above-mentioned object, the present invention comprises a camera main body provided with a viewfinder or a strobe at a position laterally displaced from a photographing lens,
A stereo adapter integrally attached to the front surface of the camera body, wherein the viewfinder or the strobe is included in a first and a second lens section that is divided into two equal parts in a longitudinal section passing through the optical axis of the taking lens. Stereo adapter having a one-eye optical system that allows the subject light to be directly incident on the first lens unit on the side and guides the subject light laterally displaced from the subject light by a predetermined distance to the second lens unit. And means for reducing the light amount of the subject light passing through the first lens unit so that the exposure amounts of the left and right subject lights imaged via the taking lens are the same. I am trying.

[0006]

According to the present invention, the camera body is provided with a viewfinder and a strobe at a position laterally displaced from the photographing lens, and the stereo adapter is integrally fixed to the front surface of the camera body. I am trying to configure a stereo camera. The stereo adapter has only the optical system for one eye. That is, in order not to interfere with the light incident on the viewfinder or the light emitted from the strobe, the first section is divided into two equal parts in the vertical section passing through the optical axis of the taking lens.
Of the second lens portion, the subject light is guided as it is without interposing an optical system to the first lens portion on the finder side or the strobe side, and the optical system of one eye of the stereo adapter responds to the subject light. The subject light, which is laterally displaced by a predetermined distance, is guided to the second lens portion so that a photograph having a stereoscopic effect can be taken.

Further, since the subject light is directly incident on the first lens portion of the photographing lens and the subject light is incident on the lens portion via the optical system of the stereo adapter, the exposure amount is left and right. There is a big difference. Therefore, the light amount of the subject light passing through the first lens portion is reduced so that the exposure amounts of the left and right subject lights match.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a stereo camera according to the present invention will be described in detail below with reference to the accompanying drawings. 1 is a front view showing an embodiment of a stereo camera according to the present invention.
FIG. 2 is a sectional view taken along line 2-2 of FIG. 1.

As shown in these drawings, the stereo camera is mainly a box-shaped camera body 10
And a stereo adapter 20 integrally fixed to the camera body 10. Camera body 1
0 is a simple camera "Shooting Run Flash" that the applicant has provided with a lens on a 35mm size film.
It is configured almost the same as the (commercial name) and is hereinafter referred to as a "film unit with lens". As shown in FIG. 2, the lens-fitted film unit 10 includes a plastic unit body 11, a front cover 12, and a back cover 13 as main components. A cartridge chamber 14 and a film chamber 15 are formed on the left and right of the unit main body 11, and a plastic taking lens 16 is attached to the front surface via a lens holder 16A, and a shutter (not shown),
A film winding mechanism and the like are provided.

The front cover 12 and the back cover 13 are joined to the unit main body 11 from the front and back and then fixed by ultrasonic welding or the like, and the user can use the cartridge chamber 14 and the film chamber 15.
The inner film (not shown) cannot be taken out. Further, in FIG. 1, 17 is a finder and 18 is a strobe. The viewfinder 17 and the strobe 18 are shown in FIG.
It is disposed on the right side above, and is also inclined with respect to the camera body 10 as shown in FIG. That is,
Of the left and right lens portions that are divided into two equal parts in a vertical section passing through the optical axis of the taking lens 16, the optical axis I ₂ of the right lens portion in FIG.
And the optical axis I ₃ of the finder 17 and the strobe 18,
I ₄ is tilted so that it is substantially parallel to I ₄ .

The stereo adapter 20 includes the first mirror 2
An optical system for one eye composed of two mirrors, a first mirror 22 and a second mirror 22, and a plastic wall having a wall surface 24A which holds this optical system at a predetermined position and which coincides with a longitudinal section passing through the optical axis of the taking lens 16. It is composed of a housing 24,
It is accurately positioned and fixed on the front surface of the lens-equipped film unit 10.

This stereo adapter 20 includes a front cover 1
Although it protrudes more forward than 2, it is on the left side of the taking lens 16 as shown in FIGS. 1 and 2, so that the stereo adapter 20 enters the viewfinder area and strobe area, that is, the incident light to the viewfinder 17. Also, it does not interfere with the light emission from the strobe 18. Further, the stereo camera having the above configuration is packaged by the packaging body 30. The package 30 is formed of a printable cardboard, a thin plastic sheet, or the like, and is integrated with the lens-fitted film unit 10 and the stereo adapter 20.
Is formed in a shape that covers the front surface, the back surface, the side surfaces, the upper surface, and the lower surface.

As shown in FIG. 1, the packaging body 30 is formed with an opening 31, a viewfinder 17, an opening for the strobe 18, etc. corresponding to the left photographing area facing the first mirror 21 of the stereo adapter 20. . Furthermore, a not-shown perforation line for separation is provided on the side surface of the stereo adapter 20 facing the recess 26 (that is, the back surface of the first mirror 21).

Various designs can be applied to the surface of the packaging body 30, and the surfaces of the lens-equipped film unit 10 and the stereo adapter 20 covered by the packaging body 30 can be made into an inexpensive rough surface. .. Further, when the camera is used, the side surface of the package 30 is cut along the perforation for separating and is bent inward as shown by a chain double-dashed line in FIG. As a result, the concave portion 26 covered by the package 30 appears on the side of the stereo camera, and the concave portion 26 can be used as a fingerhold when the camera is held during photographing, and the camera can be easily held.

In FIG. 2, the lens portion on the left side of the taking lens 16 uses a first mirror 21 and a second mirror 22 of the stereo adapter 20 to display a subject image in a predetermined range centered on the optical axis I ₁ in one frame of the film. The image is formed in the right half, and the lens portion on the right side of the taking lens 16 forms an image of a subject in a predetermined range around the optical axis I ₂ in the left half of one frame of the film. That is, this stereo camera images a subject from a position separated by a distance L between the left and right optical axes I ₁ and I ₂ , and images the subject on the left and right of one frame of the film, respectively.

[0016] It should be noted that a stereoscopic object can be seen by viewing a photograph taken in stereo in this way with a stereo viewer. Now, the brightness of the subject light reflected by the two mirrors 21 and 22 of the stereo adapter 20 is reduced to about one half of that of the subject light that is transparent. Therefore, in the present invention, the light amount of the subject light passing through the right half lens portion of the taking lens 16 is reduced so that the exposure amounts of the left and right subject lights match.

FIG. 3A is an enlarged view showing a first embodiment of the aperture hole portion of the lens holder 16A shown in FIG. 2, and FIG. 3B is a front view thereof. As shown in these drawings, a semicircular ND filter 40 is provided in the aperture hole portion. As a result, the brightness of the transparent subject light incident on the right half lens portion of the taking lens 16 is reduced. The density of the ND filter 40 is selected so that the exposure amounts of the left and right subject light are the same. Also, this N
Not limited to the D filter 40, the right half lens portion of the taking lens 16 may be directly ND coated.

FIG. 4A is an enlarged view showing a second embodiment of the aperture hole portion of the lens holder 16A shown in FIG. 2, and FIG. 4B is a front view thereof. As shown in these drawings, a thin plate 42, which projects in a semicircular shape and is provided with a large number of small holes, is provided in the throttle hole portion. As a result, the brightness of the transparent subject light incident on the right half lens portion of the taking lens 16 is reduced. The total area (number of holes) of the holes formed in the thin plate 42 is designed so that the exposure amounts of the left and right subject light are the same. Also,
The shape of the hole is not limited to a circle, but a regular polygon such as a regular hexagon or regular octagon is desirable.

FIG. 5A is an enlarged view showing a second embodiment of the aperture hole portion of the lens holder 16A shown in FIG. 2, and FIG. 5B is a front view thereof. As shown in these drawings, the diaphragm hole is provided with a thin plate 44 that projects in a semicircular shape and has a large number of slits. Each slit has a fan shape that extends radially. As a result, like the thin plate 42 having the holes, the brightness of the transparent subject light incident on the right half lens portion of the taking lens 16 is reduced.

[0020]

As described above, according to the stereo camera of the present invention, the stereo adapter is integrated with the front surface of the camera body in which the viewfinder and the strobe are laterally displaced with respect to the taking lens. When configuring the camera, since the optical system of the stereo adapter was used for one eye, it is possible to prevent the incident light to the viewfinder and the light emission from the strobe from being obstructed, especially for the vignetting of the viewfinder and strobe, This is effective when it is not possible to secure a space for disposing the optical system for both eyes.

Further, among the left and right lens portions of the photographing lens, a means for reducing the light amount is provided on the side of the lens portion on which the transparent subject light is incident, so that the exposure amounts of the left and right subject light can be matched. This enables good stereo shooting.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a stereo camera according to the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

3 (A) is an enlarged view showing a first embodiment of the aperture hole portion of the lens holder shown in FIG. 2, and FIG. 3 (B) is a front view thereof.

4 (A) is an enlarged view showing a second embodiment of the aperture hole portion of the lens holder shown in FIG. 2, and FIG. 4 (B) is a front view thereof.

5 (A) is an enlarged view showing a third embodiment of the aperture hole portion of the lens holder shown in FIG. 2, and FIG. 5 (B) is a front view thereof.

[Explanation of symbols]

 10 ... Camera body (film unit with lens) 16 ... Shooting lens 17 ... Viewfinder 18 ... Strobe 20 ... Stereo adapter 21 ... First mirror 22 ... Second mirror 40 ... ND filter 42, 44 ... Thin plate

Claims (3)

[Claims] 1. A camera main body having a viewfinder or a strobe provided at a position laterally displaced from a photographing lens, and a stereo adapter integrally attached to a front surface of the camera main body, Of the first and second lens portions that are bisected in a longitudinal section that passes through the optical axis of the lens, the subject light is directly incident on the first lens portion on the finder side or the strobe side, and And a stereo adapter having a one-eye optical system that guides the subject light laterally displaced by a predetermined distance to the second lens unit, and the exposure amounts of the left and right subject lights imaged via the taking lens are the same. As described above, a stereo camera, comprising: a unit that reduces the amount of subject light passing through the first lens unit. 2. The stereo camera according to claim 1, wherein the means for reducing the amount of light is an ND filter formed in a semicircular shape. 3. The thin plate for reducing the amount of light is a thin plate which is semicircularly projected in a diaphragm hole and is provided with a large number of small holes or slits in proportion to the amount of light to be reduced. Stereo camera.