CN211857063U - Ultra-multi-view retinal imaging device based on orthogonal polarizers - Google Patents

Abstract

The utility model discloses a super multiple viewpoint retina image device based on quadrature polaroid, the device comprise pointolite, lens, quadrature polaroid, polarized light converter, transmission type display panel and semi-transparent half mirror. After being converged by the lens, light rays emitted by the point light source sequentially pass through the orthogonal polarizer, the polarized light converter, the transmission type display panel and the semi-transmitting and semi-reflecting mirror, a convergence point is formed at the center of a pupil of a human eye, and finally an image is formed on a retina of the human eye. Two parallax images are projected to retinas of human eyes in a time sequence mode through the orthogonal polaroid and the polarized light converter, a monocular multi-view stereoscopic display effect is formed, richer depth clues are provided for a monocular, and meanwhile the effect of overlapping display of the virtual stereoscopic images and the real environment is achieved.

Description

Ultra-multi-view retinal imaging device based on orthogonal polarizers

technical field

The utility model relates to super-multi-viewpoint technology and retinal imaging technology, in particular to a super-multi-viewpoint retinal imaging device based on orthogonal polarizers.

Background technique

In recent years, the emerging AR/VR technologies all adopt the near-eye display structure, that is, the image is projected at the close distance of the viewer's eyes, and the fusion display of real and virtual images is realized through image fusion devices such as semi-transparent mirrors, planar waveguides, and free-form surfaces. , the existing near-sighted display devices all image the virtual image provided by the computer on a fixed plane in space. For myopic or hyperopia patients, they should wear both myopia or hyperopia glasses and AR equipment, which is a good solution for myopia and hyperopia. The patient's use brings great inconvenience and greatly reduces the viewing experience.

Retinal imaging technology directly images an image on the retina of the human eye. Both normal people and patients with myopia or hyperopia can obtain a clear image, and in the process of adjusting the focus of the human eye, the image is always clear, so the retina Imaging technology can superimpose virtual images on any depth surface in space, which changes with the focus depth of human eyes. However, currently only retinal imaging of a single image can be achieved, and the viewer can only see a 2D flat image. As a 3D display technology, super multi-viewpoint technology combines retinal imaging with super multi-viewpoint technology to realize the organic integration of virtual images and real three-dimensional space, which is a new direction for the development of AR/VR technology.

SUMMARY OF THE INVENTION

The utility model discloses a super multi-view retinal imaging device based on an orthogonal polarizer. As shown in FIG. 1 , the device consists of a point light source, a lens, an orthogonal polarizer, a polarized light converter, a transmission display panel and a half Transflective mirror composition. After the light emitted by the point light source is converged by the lens, it sequentially passes through the orthogonal polarizer, the polarized light converter, the transmissive display panel and the half mirror to form a convergence point in the center of the pupil of the human eye, and finally image on the retina of the human eye.

The point light source is located at the front end of the device and provides a backlight source for the entire device;

the lens converges the light emitted by the point light source to generate a convergence point;

The orthogonal polarizers are arranged in a two-dimensional matrix by cells whose polarization directions are orthogonal to each other. As shown in Figure 2, the polarization directions of adjacent cells are orthogonal to each other, and the cell size is the same as that of the pixels on the transmissive display panel. same size;

The orthogonal polarizer modulates the incident non-polarized light into mutually orthogonal polarized light of adjacent units;

The polarized light converter realizes the change of the polarization direction of the incident polarized light through voltage switching;

The transmissive display panel modulates the brightness of polarized light in a certain polarization direction, and two parallax images are displayed on the transmissive display panel. The arrangement of the two parallax images is shown in FIG. The pixels are arranged at periodic intervals in the horizontal and vertical directions;

The orthogonal polarizer, the polarized light converter and the transmissive display panel are closely arranged;

The half mirror has the function of half transmission and half reflection for incident light. The light from the transmissive display panel is reflected into the human eye through the half mirror, and the light from the real world passes through the half mirror. The transmission enters the human eye to realize the superimposed display of the virtual image and the real environment.

The switching frequency of the polarization converter satisfies the visual persistence effect of the human eye, obtaining two parallax images with one eye, realizing retinal imaging with super multi-view points, providing more accurate focusing clues for the viewer, and obtaining a more realistic visual experience.

The utility model projects two parallax images on the retina of the human eye through the orthogonal polarizer and the polarized light converter, so as to form a stereoscopic display effect of monocular multi-vision, provide richer depth clues for monocular, and realize virtual The effect of superimposing the stereoscopic image and the real environment.

Description of drawings

1 is a schematic diagram of a super multi-view retinal imaging device based on orthogonal polarizers of the present invention

Accompanying drawing 2 is the structural schematic diagram of the orthogonal polarizer of the present utility model

3 is a schematic diagram of the pixel arrangement of two parallax images displayed on the transmissive display panel of the present invention

The symbols in the above drawings are:

1 point light source P, 2 lenses, 3 cross polarizers, 4 polarization converters, 5 transmissive display panels, 6 half mirrors, 7 convergence points, 8 pupils, 9 retinas, 10 horizontal polarization, 11 Vertical polarization, 12 pixels of parallax image 1, 13 pixels of parallax image 2.

It should be understood that the above drawings are schematic only and are not drawn to scale.

Detailed ways

A typical embodiment of the cross-polarizer-based super multi-view retinal imaging device of the present invention will be described in detail below, and the present invention will be further described in detail. It is necessary to point out that the following examples are only used to further illustrate the present utility model, and should not be construed as limiting the scope of protection of the present utility model. Those skilled in the art make some improvements to the present utility model according to the above-mentioned contents of the present utility model. Non-essential improvements and adjustments still belong to the protection scope of the present invention.

The utility model discloses a super multi-view retinal imaging device based on an orthogonal polarizer. As shown in FIG. 1 , the device consists of a point light source, a lens, an orthogonal polarizer, a polarized light converter, a transmission display panel and a half Transflective mirror composition. After the light emitted by the point light source is converged by the lens, it sequentially passes through the orthogonal polarizer, the polarized light converter, the transmissive display panel and the half mirror, forming a convergence point in the center of the pupil of the human eye, and finally imaging on the retina of the human eye.

The point light source is located at the front end of the device and provides a backlight source for the entire device;

the lens converges the light emitted by the point light source to generate a convergence point;

The orthogonal polarizers are arranged in a two-dimensional matrix by cells whose polarization directions are orthogonal to each other. As shown in Figure 2, the polarization directions of adjacent cells are orthogonal to each other, and the cell size is the same as that of the pixels on the transmissive display panel. The size is the same. In this embodiment, the cell size of the orthogonal polarizer and the pixel size of the transmissive display panel are the same, both being 0.6mm;

The orthogonal polarizer modulates the incident non-polarized light into mutually orthogonal polarized light of adjacent units;

The polarized light converter realizes the change of the polarization direction of the incident polarized light through voltage switching. In this embodiment, a TN liquid crystal cell is used as the polarized light converter;

The transmissive display panel, in this embodiment, adopts a liquid crystal panel as the transmissive display panel, which modulates the brightness of the polarized light in the horizontal direction, and displays two parallax images on the transmissive display panel. The arrangement of the two parallax images As shown in FIG. 3, the pixels of the parallax images 1 and 2 are arranged at periodic intervals in the horizontal and vertical directions;

The orthogonal polarizer, the polarized light converter and the transmissive display panel are closely arranged;

The half mirror has the function of half transmission and half reflection for incident light. The light from the transmissive display panel is reflected into the human eye through the half mirror, and the light from the real world passes through the half mirror. The transmission enters the human eye to realize the superimposed display of the virtual image and the real environment.

The light emitted by the point light source is first converged by the lens, and then polarized by the orthogonal polarizer to obtain mutually orthogonal polarized light of adjacent units. The polarization converter switches the incident polarized light rapidly, and changes the polarization of the incident polarized light in sequence. At a certain moment, the orthogonally polarized light incident on the transmissive display panel is only horizontally polarized light, that is, the light of half of the cells can pass through the transmissive display panel and illuminate the parallax image 1, forming a convergence at the pupil of the human eye. point, the parallax image 1 is clearly imaged on the retina; at the next moment, the vertically polarized light, that is, the light of the other half of the cells, passes through the transmissive display panel, illuminates the parallax image 2, and forms the same convergence point at the pupil of the human eye. Parallax image 2 is clearly imaged on the retina.

In this embodiment, the switching frequency of the polarized light converter is 120 Hz, which satisfies the visual persistence effect of the human eye. Two parallax images are obtained with a single eye, realizing retinal imaging with super multiple viewpoints, and providing more accurate focusing clues for the viewer. Get a more realistic visual experience.

The utility model projects two parallax images on the retina of the human eye through the orthogonal polarizer and the polarized light converter, so as to form a stereoscopic display effect of monocular multi-vision, provide richer depth clues for monocular, and realize virtual The effect of superimposing the stereoscopic image and the real environment.

Claims (2)

1. The device is characterized by comprising a point light source, a lens, an orthogonal polarizer, a polarized light converter, a transmission type display panel and a semi-transparent and semi-reflective mirror, wherein light rays emitted by the point light source are converged by the lens and then sequentially pass through the orthogonal polarizer, the polarized light converter, the transmission type display panel and the semi-transparent and semi-reflective mirror, a convergence point is formed in the center of a pupil of a human eye, and finally an image is formed on the retina of the human eye.

2. The cross-polarizer-based hyper-multi-viewpoint retinal imaging device according to claim 1, wherein the point light source is located at the frontmost end of the device, providing a backlight for the entire device; the lens converges the light emitted by the point light source to generate a convergence point; the orthogonal polaroid is arranged in a two-dimensional matrix by unit cells with mutually orthogonal polarization directions, the polarization directions of adjacent unit cells are mutually orthogonal, and the size of each unit cell is the same as the size of a pixel on the transmission type display panel; the orthogonal polaroid modulates incident unpolarized light into polarized light of which adjacent units are orthogonal to each other; the polarized light converter realizes the change of the polarization direction of incident polarized light through voltage switching; the transmission type display panel modulates the polarized light brightness in a certain polarization direction, two parallax images are displayed on the transmission type display panel, and pixels of the parallax images 1 and 2 are arranged at intervals in the horizontal and vertical directions; the orthogonal polaroid, the polarized light conversion and the transmission type display panel are closely arranged; the half-transmitting and half-reflecting mirror has a half-transmitting and half-reflecting function on incident light, light rays from the transmission type display panel enter human eyes after being reflected by the half-transmitting and half-reflecting mirror, and light rays from the real world enter the human eyes after being transmitted by the half-transmitting and half-reflecting mirror.

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