RU2224273C2 - Device for production of stereoscopic picture of objects - Google Patents

Abstract

FIELD: production of stereoscopic picture of objects. SUBSTANCE: has a source of picture (1) in the form of a single two-dimensional object and optical lens raster (2). The picture source (1) is located in the plane preset by the focal distance of lenses (4), having the maximum value of focal distance f_max in the meridional section, and the plane present by the focal distances of the lenses having the minimum value of focal distance f_min in the meridional section, is located between raster (2) and picture source (1). The value of focal distance f_min should be within f $\genfrac{}{}{0ex}{}{\text{1}}{\text{min}}$ ≤f_min≤f $\genfrac{}{}{0ex}{}{\text{2}}{\text{min}}$ , where

Description

 The invention relates to surround television, stereoscopy, surround photography, surround cinema, holography, surround printing, surround computer images, art.

 A device for obtaining a three-dimensional image of objects containing an image source and a lens raster, the lenses of which in the sagittal section are made with a variable radius of curvature (see RF patent 2098855 C1 dated 05.10.95), which allows to obtain a three-dimensional image according to the principle of formation of quasistereopairs.

 The disadvantage of this device is the inability to form a pre-screen surround image, because the imagery mechanism contains only an imaginary on-screen image and there is no actual pre-screen part of the image.

 A device for obtaining a three-dimensional image of objects containing an image source and optical lens rasters - the main and secondary, aperture in the meridional section, and the focal plane of the additional raster is located near the image created by the main raster (see RF patent application 98115465/28 from 10.08. 98).

 This device allows you to obtain a three-dimensional image with a pre-screen output, however, due to the lack of variable optical power of the raster in the sagittal section, the image has a horizontal scale unnatural for a real three-dimensional image (lack of quasi-parallax).

 In addition, due to the presence of two closely spaced linear structures in the observed image, moire may appear.

 Closest to the proposed device for obtaining a three-dimensional image of objects is a device for obtaining a three-dimensional image of objects, containing an image source and an optical lens raster, the lenses of which in the sagittal and meridional sections are made with a variable radius of curvature (see patent application of the Russian Federation 98108927/28 of 07.05 .98).

 This device provides a three-dimensional image.

 However, due to the fact that the image source in the meridional section is located between the raster and its focal plane, the image remains imaginary, which, taking into account the action of the sagittal component of the raster, on the one hand emphasizes the perspective and increases the effect of sagittal parallax, and on the other hand, does not the possibility of obtaining pre-screen image output.

 In addition, when placing the image source outside the focal plane of the raster, the on-screen perspective is also limited, since the effect of imaginary infinity remains unfulfilled.

 The purpose of this technical solution is to obtain a three-dimensional image with a pre-screen output, as well as increase the screen perspective to an imaginary infinity.

P - размер диагонали растра,
L - расстояние наилучшего видения глаза зрителя.This goal is achieved by the fact that in the device for obtaining a three-dimensional image of objects containing an image source in the form of a single two-dimensional object and an optical lens raster, the image source is placed in a plane defined by the focal lengths of the lenses having the maximum focal length value f _max in the meridional section, and the plane defined by the focal lengths of lenses having a meridian section a minimum value of the focal length f _min, is disposed between the raster and source Images CONTROL, wherein this plane corresponding to the focal distance value should be in the range: f _min ¹ ≤f _min ≥f _min ² where

P is the diagonal size of the raster,
L is the distance of the best vision of the viewer's eye.

The invention is illustrated by drawings, where:
- figure 1 shows the device in a meridional section;
- in FIG. 2 shows a layout of depth plans of the image created by the device.

A device for obtaining a three-dimensional image of objects according to a specific non-limiting embodiment of the invention, shown in FIG. 1 together with an image source 1 made in the form of a single two-dimensional object, and a lens raster 2, the lenses of which in sagittal and meridional sections are made with a variable radius of curvature, the image plane 3 of the image source 1 is parallel to the N plane, coinciding with the main planes of the lenses 4, 5, 6 of the meridional section of the raster 2 with focal lengths f _max , f _min ¹ , f _min ^2, respectively.

 This device for obtaining a three-dimensional image of objects operates as follows.

Since the plane 3 of the source 1 of the image is combined with the focal planes of the lens 4 with focal lengths f _max , the viewer 7, observing the points "a" and "b" in the meridional section (Fig. 1) of the plane 3, sees their images on the 8 coming from the points "a", "c" and passing through the center of the lens 4 and the pupil of the eye of the viewer 7. The viewer 7 perceives them as rays coming from an infinitely distant plan 9 (figure 2).

В неограничивающем примере при Р=510 мм, f_max=10 мм, f_min ¹=3,3 мм точка "с" участвует в формировании плана 11 (фиг.2), формирующего минимально значимый предъэкранный выход объемного изображения.Point c, also located in plane 3 at a distance f _max from plane N, viewer 4 will observe on line of sight 10, originating from point c and passing through the center of lens 5 and the pupil of the eye of viewer 7. To point c located from the N plane at a distance f _max , focused to the point "c '" located from the same plane at a distance of 0.001P, the focal length f _min ^{1 of the} lens 5 is determined by solving the equation of the lens (lens formula) relative to its focal length f _min ¹ and get:

In a non-limiting example, at P = 510 mm, f _max = 10 mm, f _min ¹ = 3.3 mm, the point "c" is involved in the formation of plan 11 (Fig. 2), which forms the minimum significant pre-screen output of a three-dimensional image.

В неограничивающем примере при Р=510 мм, f_max=10 мм, L=250 мм, f_min ²=9,8 мм, точка "d'" участвует в формировании плана 13 (фиг.2), формирующего максимально значимый предъэкранный выход объемного изображения, при этом план 13 находится на расстоянии наилучшего видения зрителя 7.The point "d" located in the plane 3 at a distance f _max from the plane N, the viewer 4 will observe on the line of sight 12 coming from the point "d" and passing through the center of the lens 5 and the pupil of the eye of the viewer 7. To point "d", located on the N plane at a distance of f _max , focused to the point "d" located from the same plane at a distance of 5P-L, the focal length f _min ^{2 of the} lens 5 is determined by solving the equation of the lens relative to its focal length, and get:

In a non-limiting example, when P = 510 mm, f _max = 10 mm, L = 250 mm, f _min ² = 9.8 mm, the point "d '" is involved in the formation of plan 13 (figure 2), which forms the most significant pre-screen output volumetric image, while the plan 13 is located at a distance of the best vision of the viewer 7.

 Taking into account the small size of the aperture of the eye of the viewer 7 and its removal when observing the image from the raster 2 by an amount of the order of five sizes of the diagonal of the raster 2, as well as the choice of lens sizes 4, 5, 6 of the raster 2, commensurate with the size of the resolution element of the image plane 3, arising when the raster 2 lenses are working, the inversion of the "c '" and "d'" points will not affect the final image.

 If the profile of the sections of the raster lenses has off-axis components of variable radius of curvature, as well as components with negative curvature, additional depth plans located between plans 9, 13 appear in the image, which leads to a more complete filling of the volume image with plans.

 In the sagittal section of the raster 2, a stereo pair of the image of the plane 3 of the source 2 is created, which is associated with the passage of light rays from the plane 3 into the right and left eye of the viewer 7 through the sections of the raster 2 through lenses with different values of the curvature of the optical surfaces. In the presence of secondary factors of volumetric vision in the original image, a volumetric effect arises when observing the image.

Claims (1)

A device for obtaining a three-dimensional image of objects containing an image source in the form of a single two-dimensional object and an optical lens raster, characterized in that the image source is placed in a plane defined by the focal lengths of the lenses, having in the meridional section the maximum value of the focal length f _max , and the plane specified focal length lens having a meridian section a minimum focal length f _min, is disposed between the raster and source image, thus with tvetstvuyuschee this plane focal length should be within

Where

P is the diagonal size of the raster; L is the distance of the best vision of the viewer's eye.

Images