JP2000028964A - Stereoscopic viewer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily form a stereoscopic picture regardless of the width of a pupil distance by using a stereoscopic viewer. SOLUTION: This stereoscopic viewer is provided with a binoculars lens 15 for stereoscopically observing a stereoscopic photograph 7. By making the lens 15 deviated outside in a left and a right directions, two photographs 7 are made to be easy to be superposed at a central part so as to cope with the difference of the pupil distance. By changing the thickness of the lens 15 so that a focal distance is changed in an upper and a lower directions, the photograph 7 can be observed through a lens part respectively adjusted to young and old people.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereo viewer for stereoscopically observing a set of two stereo photographs with a binocular lens.

[0002]

2. Description of the Related Art A stereo viewer is a device for observing a subject in three dimensions by viewing two left and right photographs taken with a camera at different positions using a binocular lens. Is created by a method of shooting with a dedicated stereo camera equipped with two shooting lenses, or a method of changing the position with one camera and shooting.

FIG. 6 (a) shows an external view of the dedicated stereo camera. This stereo camera is provided on a front surface of a camera body 1 provided with a finder 2 and a shutter button 3 at an interval of about 70 mm. , Two photographing lenses 4 and 5 are provided. When the shutter button 3 is pressed, the subject positioned by the finder 2 is simultaneously photographed on the film disposed in the camera body 1 via the photographing lenses 4 and 5, and the film is captured from different angles. The two photographed subjects are imprinted.

FIG. 6 (b) shows the structure of a conventional stereo viewer of a simplified type. Two stereo photographs 7 printed on a photographic paper from the above-mentioned film are mounted on a photograph holder 6a of a viewer body 6. Are inserted, and the binocular lenses 8a and 8b are arranged so as to observe the stereo photograph 7 at a clear viewing distance (about 25 cm). Therefore, if the stereo photograph 7 is viewed with the binocular lenses 8a and 8b, the subject can be observed as a three-dimensional image.

[0005]

However, FIG.
In the conventional stereo viewer shown in FIG. 1B, convex lenses having a fixed curvature are used as the binocular lenses 8a and 8b, and this binocular lens 8 cannot be used by all young and old users to accurately adjust the focal length. was there.
That is, the human eye becomes hyperopic as the age increases, and an image of an object can be formed behind the retina. Therefore, it is difficult to observe a stereoscopic photograph with a normal binocular lens 8 at a clear visual distance.

Further, the two stereo photographs shown in FIG. 6 (b) are superimposed by superimposing two photographs arranged at a predetermined interval with human eyes when viewed through the binocular lens 8. Although the image can be recognized as a stereoscopic image, there is a problem that it is difficult to perform the above-described superimposition when the person has a narrow eye width (width between both eyes).

The present invention has been made in view of the above problems, and an object of the present invention is to provide a stereo viewer that can easily form a stereoscopic image regardless of the width of the interpupillary distance.

[0008]

To achieve the above object, the present invention provides a stereo viewer having a binocular lens for stereoscopically observing a stereo photograph, wherein the binocular lens is decentered outward in the left-right direction. It is characterized by the following.

[0009]

According to the above arrangement, two stereo photographs can exist as if they were in the center line extension direction of both eyes, so that even a person with a narrow eye width can easily observe a stereoscopic image. .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an overall configuration of an embodiment will be described with reference to FIGS. FIG. 2 shows a configuration of a package / stereo viewer according to the example.
The main body case 10 has a box shape made of a paper material or a plastic material, and is formed to have a size capable of storing a plurality of sets of stereo photographs 7 in which a pair of photographs is printed. The body case 10 is covered with a lid 11 which is slightly larger than the case 10 and made of the same material as the body case 10.
An inverted trapezoidal cut 12 is formed in the left and right side surfaces of the main body case 10 so that the stereo photograph 7 can be easily taken in and out.
It is preferable to form an anti-reflection film for preventing light reflection on the inner surface of the main body case 10.

A holder 14 for holding the stereophotograph 7 upright is formed on the rear side of the main body case 10, and the holder 14 is provided with a projecting piece parallel to the rear side from the left and right sides. Is done. Therefore, as shown in FIG. 3, the stereo photograph 7 can be held between the rear side surface of the main body case 10 and the projecting piece of the holder portion 14. On the other hand, binocular lenses 15a and 15b made of a plastic material (or glass material) are attached to the front surface of the case facing the rear surface of the holder portion 14. The binocular lenses 15a and 15b are set on the holder portion 14 by the binocular lenses 15a and 15b. Distance of the stereo photograph 7 (approx. 25 cm)
Can be set to Further, the front side surface of the binocular lens 15 and the rear side surface of the holder portion 14 in the main body case 10 are inclined by a predetermined angle, and the binocular lens 15 is set so as to face the vertical center of the stereo photograph 7 by this inclination. ing.

FIG. 4 shows a cross section of the stereo viewer. The stereo photograph 7 is observed from the binocular lens 15 by holding the cut 12 by hand as shown. The binocular lens 15 of the stereoviewer is shown in detail in FIG. 5, and the binocular lens 15 is formed as a varifocal lens so that the thickness thereof is different in the vertical direction. The clear vision distance is about 50cm from the thickness Acm for young people whose clear vision distance is about 25cm
It is formed so as to change continuously up to the thickness Bcm for the elderly. Therefore, a young person can use the upper side of the lens to focus on the stereo photograph 7 of FIG. On the other hand, by using the lower side of the lens, the elderly can shift the focal position of the stereo photograph 7 to be observed at a clear viewing distance to the front side and focus the image on the retina, regardless of age. Anyone can observe a stereoscopic image from the stereo photograph 7.

As shown in FIG. 1 or FIG. 5 (c), the binocular lens 15 of the embodiment is a lens which is decentered in the left-right direction, and as shown in FIG. The binocular lenses 15a and 15b are arranged so as to be shifted Smm outward. According to this, the stereo photograph can be observed at the clear viewing distance R (about 25 cm), and the stereo photograph 7 is superimposed on the center point O of both eyes at the clear viewing distance R, and the stereo photograph 7 can be viewed in the direction 200. Photo 7 can be seen as present. In other words, the decentered binocular lens 15 is substantially in the same state as a conventional lens having a wedge-shaped prism as indicated by a dashed line. 7 is present inside. Therefore,
It becomes easy to superimpose the two photographs, and it becomes easy for anyone including a person with a narrow pupil to perform stereoscopic observation.

In the above embodiment, the thickness of the binocular lens 15 is made thinner on the upper side and thicker on the lower side. However, the thickness may be reversed, and the upper side may be used for the elderly and the lower side may be used for the young.

In this embodiment, an example is shown in which the binocular lens 15 of the present invention is applied to a stereo viewer that is also used as a package. Can be.

[0016]

As described above, according to the present invention,
Since the binocular lens is decentered outward in the left-right direction, all users can easily observe a stereoscopic image without difficulty in stereoscopic observation due to a difference in interpupillary distance.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a state when a stereo photograph is observed with a stereo viewer according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the overall configuration of the package / stereo viewer of the embodiment.

FIG. 3 is a perspective view showing a state used as a stereo viewer in the embodiment.

FIG. 4 is a cross-sectional view of a stereo viewer of the embodiment.

5A and 5B are diagrams illustrating a configuration of a binocular lens according to an embodiment, wherein FIG. 5A is a front view, FIG. 5B is a side view, and FIG.

FIG. 6 is a diagram showing a configuration of a conventional stereo camera (FIG. A) and a stereo viewer (FIG. B).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Camera main body, 4,5 ... Shooting lens, 6 ... Viewer main body, 7 ... Stereo photograph, 8a, 8b, 8 ... Binocular lens, 10 ... Main body case, 11 ... Lid, 14 ... Holder part, 15a, 15b, 15 … Binocular lens.

Claims (1)

[Claims] 1. A stereo viewer having a binocular lens for stereoscopically observing a stereo photograph, wherein the binocular lens is decentered outward in the left-right direction.