JP2542096Y2 - Stereo camera - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereo camera, and more particularly to a camera for photographing on a reversal film for observation with a rewind type viewer.

[0002]

2. Description of the Related Art A stereo camera is for taking a photograph for stereoscopic observation. This type of stereo camera is provided with, for example, two photographing lenses, and is capable of photographing the same subject at two different positions on the left and right. Can be. The two stereo photographs can be observed three-dimensionally by observing the subject with a binocular lens of a stereo viewer. The stereoscopic observation is performed by using a photograph printed on photographic paper.
In some cases, it is mounted on a reversal film, which is a positive film, so that the film can be wound up and rewinded.

FIG. 3A shows the appearance of the above-mentioned take-up / rewind type stereo viewer, and the upper surface of the viewer main body 1 is connected to take-up reels 2a and 2b provided inside. Operation dials 3a and 3b are provided.
A positive type reversal film 4 is disposed on the take-up reels 2a and 2b. The film 4 is rewindable and can be moved in the left and right directions by the operation dials 3a and 3b. . On the front side of the viewer body 1, two binocular lenses 5a and 5b are attached at an interval of about 70 mm corresponding to the interpupillary distance. Therefore,
As shown in FIG. 3B, a pair of stereo photographs taken on the film 4 is converted into binocular lenses 5a and 5b.
In this case, the subject on the stereo photograph is observed three-dimensionally.

[0004]

In the case of performing stereo observation with a film photograph as described above, unless the exposure conditions are limited to a predetermined range at the time of photographing, a stereoscopic photograph in a good state is viewed. There is a problem that you can not. That is, in the case of a reversal film, since the film itself is used as a stereo photograph, it may not be possible to make subsequent adjustments as compared with the case of printing on photographic paper, and the photographing state of the photograph must be good.

[0005] In particular, a simple camera (such as a one-time use camera) has a fixed shutter speed and does not have an automatic exposure device or the like. Therefore, photographing conditions are selected according to the brightness (luminance) of the subject. In some cases, the subject may be underexposed (under) or overexposed (over) depending on the subject, and a stereo camera for taking a film photograph for a viewer using a reversal film as a simple camera. It is a barrier.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a stereo camera capable of taking a stereo photograph for a reversal film under favorable exposure conditions even with a simple camera. It is in.

[0007]

In order to achieve the above-mentioned object, the present invention provides a stereo camera which simultaneously shoots a set of two photographs through two photographing lenses arranged at a predetermined interval. to detect the required object luminance in photographing by a reversal film, a plurality of transmittance of light is different
The optical member for detecting the luminance in which the area is set is provided.
Exposure of the subject in the transmitted light path of each area of the detection optical member
A display indicating the degree of achievement of the condition is placed, and this display is
The light transmitted through the optical member is recognized by the photographer .

[0008]

According to the above arrangement, it is detected by various luminance detecting means whether or not the brightness of the subject is within a luminance range which satisfies a preset exposure condition in the camera. If so, for example, an OK (OK) mark is displayed near the finder.

[0009]

FIG. 1A shows a stereo camera according to a first embodiment, which is manufactured as a simple camera (single-use camera). The camera body 10 is formed by a through hole. A finder lens 12a and a shutter 13 are provided, and photographing lenses 14a and 14b arranged at an interval of about 30 mm are provided on the front surface thereof. Conventionally, the distance between the two photographing lenses 14a and 14b is generally set to about 7
Although it was set to 0 mm, it has been confirmed that shortening this interval does not affect the taking of a stereoscopic photograph, so in this embodiment, this interval is set to about 30 mm to reduce the size of the camera. .

In the vicinity of the finder 12, an optical wedge 15 is provided as a luminance detecting means for detecting luminance and a display means. The optical wedge 15 is provided to be exposed on the front of the camera as shown in FIG. The configuration is such that the back surface of the optical wedge 15 is visible when looking through the finder 12. The optical wedge 15 has a light transmittance that varies stepwise in, for example, the horizontal direction, and detects the brightness (brightness) of light from a subject depending on where a predetermined brightness position is. Can be.

FIG. 2B is a view of the optical wedge 15 as viewed from the back side. In the first embodiment, the optical wedge 15 is configured so that the brightness changes in three stages. On the back side of the optical wedge 15, an "OK" mark 15a is provided at a center portion which shows an intermediate transmittance and a brightness for obtaining the best exposure for taking a stereo photograph with a reversal film, To indicate underexposure
The strobe mark (or ×) shown on the left side of
Mark may be used) to indicate the degree of overexposure.
Is marked with a triangle mark on the lower right side . Therefore, when the brightness of the subject is low and the exposure is insufficient, the OK display is not performed. When the brightness of the subject is high and the exposure is excessive, the OK display is performed.
Along with the display, a double triangle mark will be displayed. The mark 15a may be a mark of another character or symbol such as "OK", and the same applies to other marks.

According to the optical wedge 15 of the first embodiment, when the double triangle mark is not visible and only the OK display is visible,
It will be understood that the exposure conditions are appropriate and that the photographing can be performed in an optimal state. Therefore, when either the underexposure or the overexposure is displayed by the strobe mark or the triangular mark, it is possible to set the appropriate subject brightness by changing the photographing conditions. In the above description, the photographing state under the condition that the exposure is excessive is small, and the condition under the condition that the exposure is rather low is common in many cases. It is also possible to use one that distinguishes.

[0013] FIG. 2 is a configuration is shown in the second embodiment, the second embodiment is obtained using a selenium photocell as a brightness detecting means in the simple camera attached strobe. The camera shown in FIG. 2A has a structure in which a strobe 16 is mounted in addition to the structure shown in FIG. 1, and a selenium detecting element 17 is provided as a luminance detecting means near the finder 12 on the front of the camera. .

FIG. 2B shows the selenium detecting element 17.
The selenium detecting element 17 is a selenium photovoltaic cell 1 in which a lattice is provided on the back side of a compound eye lens 18.
9. The selenium photocell 19 can perform a photoelectric conversion and output a relatively large current. A light emitting diode (LED) 20 is connected to the selenium detecting element 17, and the light emitting diode 20 is connected to the finder 1 in the camera body 10.
2 and the light emitting diode 20
As shown in FIG. 3C, a display board 22 on which characters "OK" are printed is attached at a position visible from the viewfinder 12. The light emitting diode 20 is set so as to emit light by the current generated by the selenium photocell 19 when the selenium detecting element 17 detects the brightness that provides the optimum exposure for obtaining a film photograph.

According to the second embodiment, the luminance of a subject when a stereo photograph is taken is detected by the selenium detecting element 17, and when the brightness for achieving a good exposure state is detected, the luminance is generated by the selenium detecting element 17. The light emitting diode 20 emits light by the applied current. Therefore, as shown in FIG. 3C, when a good exposure state is detected, the display panel 22 is turned on by the light emitting diode 20.
Is displayed, and an exposure state can be displayed without using a power supply battery. And in the case of the second embodiment,
If OK is not displayed on the display panel 22 due to insufficient exposure, the photographing can be performed under the optimal exposure condition using the strobe 16.

In the above embodiment, the optical wedge 15 or the selenium detecting element 17 is used as the means for detecting the luminance. However, other photovoltaic elements or photoconductive elements can be used as the detecting means. The same applies to the means.

[0017]

[Effect of the Invention] As described above, the invention of the first claim is provided.
According to the luminosity which set a plurality of areas with different light transmittance
The optical member for detecting the brightness is provided and each of the optical members for detecting the luminance is provided.
In the transmitted light path of the area, the degree of achievement of the exposure condition of the subject
Display, and the display recognizes the display with transmitted light.
Because of this, it is possible to take a picture under exposure conditions suitable for a reversal film, and there is an advantage that a good stereo photograph can be obtained even with a simple camera.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a stereo camera according to a first embodiment of the present invention, wherein FIG. 1 (a) is an external perspective view, and FIG. 1 (b) is a configuration of an optical wedge as a luminance detection unit and a display unit. FIG.

FIGS. 2A and 2B are diagrams showing a configuration of a second embodiment, wherein FIG. 2A is an external perspective view, FIG. 2B is a diagram showing a configuration when a selenium detecting element is used as a luminance detecting means, and FIG. () Is a diagram showing a display state of whether or not the exposure condition is possible.

FIG. 3 is a diagram showing a configuration of a conventional stereo viewer (FIG. 3A) and a diagram showing a state of stereoscopic observation (FIG. 3B).

[Explanation of symbols]

1 ... viewer body, 4 ... film, 10 ...
Camera body, 12 finder, 15 optical wedge, 17 selenium detecting element, 19 selenium photocell, 20 light emitting diode, 22 display panel.

Claims (1)

(57) [Scope of request for utility model registration] 1. A stereo camera for photographing a predetermined two set of photos via two photographic lenses arranged at intervals at the same time, in order to detect the required object luminance in photographing by reversal film, Set multiple areas with different light transmittance
The optical member for detecting the luminance is provided, and the image pickup is provided in the transmission optical path of each area of the optical member for detecting the luminance.
A display showing the degree of achievement of the body exposure condition is placed, and this table is displayed.
A photographer is made to recognize the indication by light transmitted through the optical member .