JPH04288517A - Stereoscopic viewer - Google Patents

Abstract

PURPOSE:To enable a person of any age to excellently observe a stereoscopic photograph at a bright view distance and also to easily form a stereoscopic image irrelevantly to the extent of eye width. CONSTITUTION:The stereoscopic viewer is equipped with binocular lenses 15 for observing the stereoscopic photograph 7 stereoscopically and said binocular lenses 15 are varied in thickness so as to vary in focal length vertically, so that the stereoscopic photograph 7 can be observed through lens parts matching the age. Further, two stereoscopic photographs 7 can easily be put on a center part by making said binocular lenses 15 eccentric in the left and right outward directions to absorb a difference in eye width.

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 using binocular lenses.

0002

[Prior Art] A stereo viewer is a device that observes a subject three-dimensionally by viewing two left and right photographs of the same subject taken with a camera at different positions through binocular lenses. is created by photographing with a dedicated stereo camera equipped with two photographing lenses, or by photographing with a single camera at different positions.

[0003] FIG. 6(a) shows the external appearance of the above-mentioned dedicated stereo camera. Two photographic lenses 4 and 5 are arranged. Then, by pressing the shutter button 3, the subject positioned in the finder 2 is simultaneously photographed on the film placed in the camera body 1 through the photographic lenses 4 and 5. The subject will be imprinted on the two images.

FIG. 6(b) shows the configuration of a conventional simple stereo viewer, in which two stereo photographs 7 printed from the above-mentioned film onto photographic paper are mounted on a photograph holder 6a of the viewer main body 6. is inserted, and binocular lenses 8a and 8b are arranged so as to observe this stereo photograph 7 at a clear viewing distance (approximately 25 cm). Therefore, if the stereo photograph 7 is viewed through the binocular lenses 8a and 8b, the subject can be observed as a three-dimensional image.

[0005]

[Problem to be solved by the invention] By the way, the above figure 6 (
In the conventional stereo viewer shown in b), convex lenses with a constant curvature are used as the binocular lenses 15a and 15b, and the problem with this binocular lens 15 is that not all users, young and old, can accurately adjust the focal length. there were. That is, as human eyes grow older, they become farsighted and the image of an object forms behind the retina, making it difficult to observe a stereoscopic photograph at a clear vision distance using the normal binocular lenses 15.

[0006] Furthermore, the two stereo photographs shown in FIG. 6(b) can be obtained by superimposing two photographs arranged at a predetermined interval with the human eye when viewed through binocular lenses 15. Although the images can be recognized as three-dimensional images, there is a problem in that the above-mentioned superimposition is difficult for people with narrow interpupillary distance (distance between both eyes).

The present invention has been made in view of the above-mentioned problems, and the first object is to provide a stereo viewer that allows people of all ages to observe stereo photographs well at a clear viewing distance. The second objective is to provide a stereo viewer that can easily form stereoscopic images regardless of the width of the interpupillary distance.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the invention according to claim 1 provides a stereo viewer equipped with binocular lenses for stereoscopically observing stereo photographs. It is characterized by changing the focal length in the vertical direction.

[0009] Furthermore, the invention according to claim 2 is a stereo viewer equipped with binocular lenses for stereoscopically observing stereo photographs, characterized in that the binocular lenses are decentered outward in the left-right direction.

0010

[Operation] According to the structure of the first claim, by using the upper side of the binocular lens, young people can focus stereo photography on the retina while keeping it at clear viewing distance, as in the past, On the other hand, by using the lower side, the clear vision distance moves to the rear, so the elderly can focus the stereo photograph on the retina while keeping it at the clear vision distance, allowing all users to observe stereoscopic images. becomes possible.

[0011] Furthermore, according to the configuration of the second claim, the two stereo photographs can be made to exist in the direction in which the center lines of both eyes extend, and even people with narrow eye width can easily view stereoscopic images. can be observed.

0012

[Embodiment] First, the overall structure of the embodiment will be explained with reference to FIGS. 2 and 3. FIG. 2 shows the configuration of the package-cum-stereo viewer according to the embodiment, and the main body case 10 is box-shaped made of paper or plastic material.
It is formed in a size that can accommodate a plurality of sets of stereo photographs 7 each having a set of two photographs printed thereon. This main case 10
is covered with a lid 11 that is slightly larger than the case 10 and made of the same material as the main case 10. and,
Inverted trapezoidal notches 12 are formed on the left and right sides of the main body case 10 so that the stereo photograph 7 can be easily inserted and taken out, and an anti-reflection film is formed on the inner surface of the main body case 10 to prevent light reflection. is preferred.

Further, a holder part 14 for holding the stereoscopic photograph 7 upright is formed on the rear side of the main body case 10, and this holder part 14 has a structure in which protruding pieces are provided from the left and right sides in parallel to the rear side. be done. Therefore, as shown in FIG. 2, the stereo photograph 7 can be held between the rear surface of the main body case 10 and the protruding piece of the holder part 14. On the other hand, binocular lenses 15a and 15b made of plastic material (or glass material) are attached to the front side of the case opposite to the rear side of the holder section 14. Stereo photo 7 was taken at clear viewing distance (approximately 25 cm).
). Furthermore, the main body case 10
The front side of the binocular lens 15 and the rear side of the holder part 14 are inclined at a predetermined angle, and the binocular lens 15 is set to face the vertical center of the stereo photograph 7 due to this inclination.

FIG. 1 shows a cross section of the stereo viewer described above, and as shown in the figure, the stereo photograph 7 is observed through binocular lenses 15 while holding the notch 12 in the hand. The binocular lens 15 of the stereo viewer is shown in detail in FIG. 4, and the binocular lens 15 is formed as a varifocal lens with different thicknesses in the vertical direction. Clear vision distance is about 2
The clear vision distance is approximately 50 from the thickness Acm for young people, which is 5cm.
The thickness is formed so as to change continuously up to the thickness Bcm for the elderly. Therefore, by using the upper side of the lens, young people can use the stereo photo 7 in Figure 1 as in the past.
can be focused and observed at clear viewing distance. On the other hand, by using the lower side of the lens, the elderly can move the focus position of the stereo photograph 7 observed at clear viewing distance to the front and focus the image on the retina.
Anyone, regardless of age, can observe a three-dimensional image using the stereo photograph 7.

Furthermore, in the embodiment, as shown in FIG. 4(c), the binocular lens 15 is a lens decentered in the left-right direction, and as shown in FIG. Binocular lenses 15a and 15b are arranged outwardly shifted by Smm. According to this, a stereo photograph can be observed at a clear viewing distance R (approximately 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 is displayed in the direction 200. Photo 7 can be seen as existing. In other words, the decentered binocular lens 15 is essentially in the same state as a conventional lens with a wedge-shaped prism placed on it, as shown by the chain line, and stereo photography is achieved by the same action as this prism. 7 comes to exist inside. Therefore,
It becomes easier to superimpose two photographs, and it becomes easier for anyone, including people with narrow eye distance, to perform stereoscopic observation.

In the above embodiment, the thickness of the binocular lens 15 is thinner on the upper side and thicker on the lower side, but it may be set in reverse such that the upper side is for elderly people and the lower side is for young people.

Furthermore, in the embodiment, an example was shown in which the binocular lens 15 of the present invention was applied to a stereo viewer that also serves as a package, but it can also be applied to various conventional stereo viewers or a slide device capable of stereoscopic observation. Can be done.

[0018]

As explained above, according to the invention of claim 1, since the thickness of the binocular lenses is changed in the vertical direction so that the focal length is changed, anyone regardless of age can take stereo photographs. can be focused at clear vision distance.

Further, according to the invention according to the second claim, since the binocular lenses are decentered outward in the left-right direction, it is not difficult to perform stereoscopic observation due to differences in interpupillary distance, and all users can easily It becomes possible to observe three-dimensional images.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the configuration of a stereo viewer according to an embodiment of the present invention.

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

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

FIG. 4 is a diagram showing the configuration of a binocular lens according to an example, in which FIG. 4(a) is a front view, FIG. 4(b) is a side view, and FIG. 4(c) is a top view.

FIG. 5 is a diagram showing a state when a stereo photograph is observed using the binocular lens of the example.

FIG. 6 is a diagram showing the configurations of a conventional stereo camera (Figure a) and a stereo viewer (Figure b).

[Explanation of symbols]

1...Camera body, 4,5... Photography lens, 6... Viewer body, 7…Stereo photography, 8a, 8b... Binocular lens, １０　…　Body case, 11... Lid, 14...Holder part, 15a, 15b...Binocular lenses.

Claims (2)

[Claims] 1. A stereo viewer equipped with binocular lenses for stereoscopically observing stereo photographs, characterized in that the thickness of the binocular lenses is varied so that the focal length changes in the vertical direction. 2. A stereo viewer equipped with binocular lenses for stereoscopically observing stereo photographs, characterized in that the binocular lenses are decentered outward in the left-right direction.