JPH0511214A - Optical element for stereoscopic spectacles and stereoscopic spectacles using the same - Google Patents

Abstract

PURPOSE:To provide the optical elements for the stereoscopic spectacles and the stereoscopic spectacles which enable an easy and excellent observation to be made regardless of the position and size of the image of a photograph to be observed. CONSTITUTION:The optical elements for the stereoscopic spectacles and the stereoscopic spectacles are used to observe images of a couple of photographs having parallax together stereoscopically; and the right and left optical elements 1L and 1R are formed in a plane almost triangular prism shape and the front surfaces 11 and rear surfaces 12 of the optical elements 1R and 1L are formed spherically having the same radius.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to stereoscopic spectacles, and more particularly to an optical element for stereoscopic spectacles used for stereoscopically observing a pair of images such as photographs having parallax, and a stereoscopic vision using the same. Regarding glasses.

[0002]

2. Description of the Related Art In general, a pair of left and right images having a parallax equivalent to the binocular distance are viewed individually by the left and right eyes, so that the left and right images are viewed by the viewer's potential stereoscopic ability. It is known to fuse stereoscopically and observe as a stereoscopic image. Although the above stereoscopic observation can be performed only with the naked eye, various stereoscopic glasses have been conventionally proposed so that they can be easily observed.For example, as an optical element for stereoscopic glasses, a convex lens or the like is used. Some use a triangular prism.

However, since a lens using a convex lens has a focal point, it is necessary to position (focus) the positions of the eyes, the lens, and the image such as a photograph to be observed at a predetermined position according to the focal length of the lens. is there. Therefore, there are restrictions on the position and size of an image such as a photograph that can be viewed stereoscopically, and in general, only the size of the left and right binocular distance (about 64 mm) can be observed. Even if the image is magnified by the convex lens, the size of the image is limited, and if magnified, the mess of the color net at the time of printing can be seen in the photograph of the printed matter, which is annoying. Furthermore, since the left and right images viewed through the lens are far apart, there is a problem in that the left and right images are stereoscopically fused, and the eyes are unnaturally forced to be fatigued.

On the other hand, in the case of using the triangular prism, the images observed through the prism can be brought close to each other, so that they are easy to stereoscopically fuse and fatigue is small. Moreover, it does not require focusing as in the case of using the above-mentioned lens, and has the advantage that there are few restrictions on the position and size of an image such as a photograph to be observed. On the other hand, the image becomes elongated in the vertical direction. There was a problem.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above problems, and it is possible to determine the position and size of an image such as a photograph to be observed without the image becoming thin as described above. An object of the present invention is to provide an optical element for stereoscopic spectacles and stereoscopic spectacles that can be easily observed regardless of the situation.

[0006]

In order to achieve the above object, the present invention has the following constitution. That is, the optical element for stereoscopic glasses according to the present invention is a stereoscopic optical element for stereoscopic glasses used for stereoscopically observing a pair of images such as photographs having parallax. It is characterized in that it is formed in a prism shape having a substantially triangular plane, and that the front surface and the rear surface of each optical element are formed in a spherical shape having the same radius. In addition, the stereoscopic glasses according to the present invention include the left and right optical elements configured as described above,
It is formed integrally or separately and is housed and held in the frame. The frame is formed, for example, in upper and lower parts and the optical element is positioned and held between them. Further, for example, the frame may be configured to be separated into left and right bodies and slidable in the left and right directions with respect to each other, and the separation distance between the left and right optical elements may be arbitrarily adjusted.

[0007]

As described above, the left and right optical elements for stereoscopic glasses are formed in the shape of a prism having a substantially triangular plane, and the front surface and the rear surface of each optical element are formed in a spherical shape having the same radius. Since there is no focal point as in the case of using a conventional lens, focusing is unnecessary, observation is possible regardless of the size of the image, and the image becomes thin as in the case of using a conventional prism. Can be prevented.

[0008]

1 is a cross-sectional plan view showing an embodiment of an optical element for stereoscopic glasses according to the present invention, and FIG. 2 is a line A- in FIG.
It is an A line sectional view. In the figure, 1L and 1R are left and right optical elements for stereoscopic spectacles, and each of the optical elements is formed of transparent synthetic resin such as methacrylic resin (PMMA) or glass symmetrically and in a plane substantially triangular shape. , Front surface of each of the optical elements 1L and 1R (observation image side) 1
1 and the rear surface (observer side) 12 are formed as spherical surfaces having the same radius. The radius dimensions of both spherical surfaces are appropriate, but in the embodiment, the radius r1 = r in FIGS.
2 = 35.45 mm, the center distance L1 in the left-right direction of both radii r1 and r2 is about 15 mm, the center distance L in the front-rear direction.
2 is set to about 7.2 mm.

When performing stereoscopic observation using the optical elements configured as described above, as shown in FIG. 3, the left and right optical elements are placed in front of the left and right eyes 3L and 3R of the observer. 1L and 1R are arranged and left and right images 4L and 4R such as photographs having a parallax with respect to each other are observed in front of them, and the images 5L and 5R at that time are the same as when the triangular prism is used. It is possible to bring them close to each other as shown by a broken line, and the observer can easily make stereoscopic fusion. In addition, the front and rear surfaces of each optical element on the left and right are formed as spherical surfaces, and the radii of both spherical surfaces have the same size, so there is no focus like a lens, and focusing is not necessary. By changing the distance between the observer and the observed image, an image of any size can be stereoscopically viewed. Generally, when the distance between the observer and the observed image is A and the distance between the centers of the left and right images is C,
The proper viewing distance is about A = 2C.

In order to construct stereoscopic glasses using the above optical elements, the left and right optical elements 1L and 1R may be held in a frame. The configuration is appropriate, but FIG. 4 shows the left and right optical elements. An example is shown in which 1L and 1R are integrally formed, the frame is divided into upper and lower halves 21 and 22, and the optical elements 1L and 1R are accommodated and held between the divided frames 21 and 22.

The optical elements 1L and 1R in the illustrated example are integrally formed of transparent methacrylic resin or the like, and divided frames 21 and 22 are provided at the intermediate portion and the left and right end portions between the optical elements 1L and 1R, respectively. The protrusions 1a and 1b for positioning are integrally formed. 1a1 and 1b1
Is a lightening recess for lightening the weight formed inside the positioning protrusions 1a and 1b. On the other hand, the divided frame 21
In the embodiment, 22 is formed of black opaque synthetic resin or the like, and the left and right optical elements 1L are formed on the mating surfaces.
The half-transparent windows 2c, 2c for 1R are formed, and the fitting recesses 2a, 2b for the positioning projections 1a, 1b are formed.

The protrusion 1a is provided in each of the fitting recesses 2a and 2b.
The optical elements 1L and 1R are accommodated and held between the two frames 21 and 22 by facing the two divided frames 21 and 22 with the 1b engaged, and the two divided frames 21 and 22 are aligned with each other. On the surface, a plurality of sets of small holes 2e for connecting the two frames to each other and a projection 2f fitted therein are provided so as to face each other. In particular,
In the illustrated example, the small holes 2e and the projections 2f are provided at symmetrical positions so that both frames 21 and 22 have the same shape.
For example, there is an advantage that only one type of mold is required for molding with synthetic resin or the like.

In the above embodiment, the left and right optical elements 1L.
Although 1R is formed integrally, it may be formed separately. Figure 5
Shows an example thereof, in which the left and right optical elements 1L and 1R are formed separately, and positioning projections 1a and 1b for the frame are integrally formed at both ends of each optical element 1L and 1R.・ 1b is the fitting recess 2a of the frame 21 ・ 22
It is adapted to be engaged with 2b, and other configurations are configured in the same manner as in the above-mentioned example.

Further, the frame 2 may be formed separately on the left and right sides. In that case, the left and right frames are configured to be movable in the left and right directions so that the distance between the left and right optical elements 1L and 1R can be adjusted. May be. FIG. 6 and FIG. 7 show an example thereof, and in this example, the left and right optical elements 1L and 1R are separately formed, and the frame 2 is divided into two parts 21L and 21R and 22L and 22R vertically and horizontally. It was done. The upper and lower split frames 21L and 22L and 21R and 22R are fitted in the fitting recesses 2a.
b with the protrusions 1a and 1b engaged with the small hole 2e.
The projection 2f and the projection 2f are press-fitted to each other, and the inner end portions 2g and 2h of the left and right divided frames 21L and 21R and 22L and 22R are superposed inward and outward so as to be movable in the left-right direction. 2g1 and 2h1 are stoppers for preventing slipping out.

With the above arrangement, it is possible to easily observe large and small images having different distances to the observed image by adjusting the distance between the left and right optical elements.
For example, when observing a large image (for example, a width of about 2 m to 3 m) projected by a slide or the like from a distance by the optical element configured as described above, a relatively small image (for example, a normal print of about B3). It has been confirmed by experiments that it is better to observe the left and right optical elements closer by 10 mm than the case of observing (such as photographs). In such a case, the left and right frames should be moved closer to each other. The distance between the left and right optical elements can be adjusted simply by moving them. Further, by adjusting the distance between the left and right optical elements, it is possible to correct individual differences in the binocular distance of the observer. Further, in the above embodiment, the divided frames 21L and 22R and 21L and 22
R and R have the same shape, and when each frame is molded of synthetic resin or the like, it can be manufactured by two types of molding dies.

The configuration of each of the above embodiments is an example,
Modifications can be made as appropriate without departing from the spirit of the present invention. Especially the positioning structure of the optical element with respect to the frame,
The combined structure of the divided frames, the structure in which the left and right frames are configured to be movable in the left and right direction to adjust the separation distance between the left and right optical elements, and the like are not limited to the configurations in the illustrated examples, and can be appropriately changed. Although the stereoscopic glasses of the illustrated example are formed by dividing the frame 2 into upper and lower halves, it is also possible to have a vertically integrated structure. Further, in the embodiments of FIGS. 6 and 7, the left and right frames are moved in the left and right directions, but the left and right frames may be bent in the front and back directions by, for example, hinges, if necessary. .

[0017]

As described above, the optical element for stereoscopic spectacles and the stereoscopic spectacles of the present invention have the above-mentioned structure, so that focusing is not required as in the case of using the conventional lens, and an image of The observation can be performed regardless of the size, and the stereoscopic observation can be favorably performed without the image becoming thin as in the case of using the prism.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of an optical element for stereoscopic glasses according to the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is an explanatory diagram showing a state where stereoscopic observation is performed by the optical element of the example.

FIG. 4 is a plan view showing an embodiment of stereoscopic glasses according to the present invention.

FIG. 5 is a plan view showing another embodiment of the stereoscopic glasses according to the present invention.

FIG. 6 is a plan view showing still another embodiment of the stereoscopic glasses according to the present invention.

FIG. 7 is a partially cutaway front view of the stereoscopic glasses according to the embodiment.

[Explanation of symbols]

1L, 1R Optical element 11 front 12 Rear 21 and 22 frames 3L, 3R eyes 4L, 4R observation image 5L, 5R image

Claims (5)

[Claims] 1. An optical element for stereoscopic spectacles used for stereoscopically merging a pair of images such as photographs having parallax and observing the stereoscopic eyeglasses, wherein the left and right optical elements are each formed into a substantially triangular prism shape in plan view. In addition, the optical element for stereoscopic spectacles is characterized in that the front surface and the rear surface of each optical element are formed in a spherical shape having the same radius. 2. A stereoscopic eyeglass formed by integrally forming the left and right optical elements according to claim 1 to be housed and held in a frame. 3. Stereoscopic eyeglasses, wherein the left and right optical elements according to claim 1 are separately formed and housed and held in respective frames. 4. The stereoscopic eyeglasses according to claim 2, wherein the frame is divided into upper and lower parts and the optical element is positioned and held between them. 5. The frame is configured so as to be separated into left and right bodies and to be movable in the left and right directions with respect to each other, so that a distance between the left and right optical elements can be arbitrarily adjusted. The stereoscopic glasses mentioned.