CN211857063U - Super-multi-viewpoint retina imaging device based on orthogonal polaroid - Google Patents
Super-multi-viewpoint retina imaging device based on orthogonal polaroid Download PDFInfo
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- CN211857063U CN211857063U CN202020195634.8U CN202020195634U CN211857063U CN 211857063 U CN211857063 U CN 211857063U CN 202020195634 U CN202020195634 U CN 202020195634U CN 211857063 U CN211857063 U CN 211857063U
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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
Technical Field
The utility model relates to a super multiple viewpoint technique and retina imaging technique, in particular to super multiple viewpoint retina image device based on quadrature polaroid.
Background
The near-to-eye display structure is adopted in the newly emerging AR/VR technology in recent years, namely, images are projected at the near-distance position of eyes of a viewer, meanwhile, fusion display of real and virtual images is realized through image fusion devices such as a semi-transparent semi-reflecting mirror, a planar waveguide and a free-form surface, the existing near-to-eye display equipment images a virtual image provided by a computer on a certain fixed plane in space, for a near-sighted or far-sighted patient, the near-sighted or far-sighted patient needs to wear both near-sighted or far-sighted glasses and AR equipment, great inconvenience is brought to the use of the near-sighted and far-sighted patients, and the viewing experience.
The retina imaging technology directly images an image on the retina of human eyes, clear images can be obtained on the retinas of normal people and patients with myopia or hyperopia, and clear imaging is always kept in the process of adjusting the focus of the human eyes, so that the retina imaging technology can superpose virtual images on any depth plane in space and changes along with the difference of the focusing depth of the human eyes. But at present, only retinal imaging of a single image can be realized, and a viewer can only see a 2D plane image. The super-multi-viewpoint technology is used as a 3D display technology, so that retina imaging and the super-multi-viewpoint technology are combined, virtual images and a real three-dimensional space can be organically fused, and the method is a new direction for developing an AR/VR technology.
Disclosure of Invention
The utility model discloses a super multiple viewpoint retina image device based on quadrature polaroid, as shown in figure 1, the device comprises pointolite, lens, quadrature polaroid, polarized light converter, transmission type display panel and half-transmitting half-reflecting 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.
The point light source is positioned at the foremost end of the device and provides a backlight source for the whole device;
the lens converges the light emitted by the point light source to generate a convergence point;
the cross polarizing plates are arranged in a two-dimensional matrix by unit cells with mutually orthogonal polarization directions, as shown in fig. 2, the polarization directions of adjacent unit cells are mutually orthogonal, and the size of the 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, the arrangement mode of the two parallax images is shown in figure 3, and pixels of the parallax images 1 and 2 are arranged at intervals in the horizontal direction and the vertical direction;
the orthogonal polaroid, the polarized light converter and the transmission type display panel are closely arranged;
the semi-transparent semi-reflecting mirror has a semi-transparent semi-reflecting function on incident light, light from the transmission type display panel enters human eyes after being reflected by the semi-transparent semi-reflecting mirror, and light from the real world enters human eyes after being transmitted by the semi-transparent semi-reflecting mirror, so that superimposed display of a virtual image and a real environment is realized.
The switching frequency of the polarized light converter meets the persistence effect of human eyes, two parallax images are obtained by a single eye, the retina imaging of ultra-multiple viewpoints is realized, more accurate focusing clues are provided for a viewer, and more real visual experience is obtained.
The utility model discloses an on quadrature polaroid and polarized light converter project two parallax image chronologies to the retina of people's eye, form the stereoscopic display effect that the monocular was looked more, for the monocular provides abundanter degree of depth clue, has still realized the effect that virtual stereoscopic image and real environment stack show simultaneously.
Drawings
FIG. 1 is a schematic view of the super-multi-viewpoint retinal imaging device based on the cross-polarization film of the present invention
FIG. 2 is a schematic view of the cross-polarization sheet structure of the present invention
FIG. 3 is a schematic view showing the arrangement of two parallax images displayed on the transmissive display panel according to the present invention
The reference numbers in the figures are:
1 point light source P, 2 lenses, 3 crossed polarizers, 4 polarized light converters, 5 transmission type display panels, 6 half mirrors, 7 convergence points, 8 human eye pupils, 9 retinas, 10 horizontal polarization, 11 vertical polarization, 12 pixels of parallax image 1, and 13 pixels of parallax image 2.
It should be understood that the above-described figures are merely schematic and are not drawn to scale.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings, in which exemplary embodiments of the present invention are shown. It is necessary to point out here that the following examples are only used for further illustration of the present invention, and should not be understood as limiting the scope of the present invention, and those skilled in the art can make some non-essential improvements and modifications to the present invention according to the above-mentioned contents of the present invention, and still belong to the scope of the present invention.
The utility model discloses a super multiple viewpoint retina image device based on quadrature polaroid, as shown in figure 1, the device comprises pointolite, lens, quadrature polaroid, polarized light converter, transmission type display panel and half-transmitting half-reflecting 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.
The point light source is positioned at the foremost end of the device and provides a backlight source for the whole device;
the lens converges the light emitted by the point light source to generate a convergence point;
the cross polarizing plates are arranged in a two-dimensional matrix by unit cells with mutually orthogonal polarization directions, as shown in fig. 2, the polarization directions of adjacent unit cells are mutually orthogonal, the size of the unit cell is the same as the pixel size on the transmission type display panel, in the embodiment, the size of the unit cell of the cross polarizing plate is the same as the pixel size of the transmission type display panel, and both are 0.6 mm;
the orthogonal polaroid modulates incident unpolarized light into polarized light of which adjacent units are orthogonal to each other;
the polarization converter realizes the change of the polarization direction of the incident polarized light through voltage switching, and in the embodiment, a TN liquid crystal box is adopted as the polarization converter;
the transmissive display panel, in this embodiment, adopts a liquid crystal panel as the transmissive display panel, which modulates the polarized light intensity in the horizontal direction, and displays two parallax images on the transmissive display panel, the arrangement of the two parallax images is as shown in fig. 3, and the pixels of the parallax images 1 and 2 are arranged at intervals in the horizontal and vertical directions;
the orthogonal polaroid, the polarized light converter and the transmission type display panel are closely arranged;
the semi-transparent semi-reflecting mirror has a semi-transparent semi-reflecting function on incident light, light from the transmission type display panel enters human eyes after being reflected by the semi-transparent semi-reflecting mirror, and light from the real world enters human eyes after being transmitted by the semi-transparent semi-reflecting mirror, so that superimposed display of a virtual image and a real environment is realized.
Light rays emitted by a point light source are converged by a lens, and then polarized by an orthogonal polarizer to obtain polarized light which is orthogonal to each other of adjacent units, a polarized light converter is used for rapidly switching the incident polarized light, the polarization direction of the incident polarized light is changed in a time sequence, at a certain moment, the orthogonal polarized light incident on a transmission type display panel is only horizontal polarized light, namely, half of the light rays of a unit cell can irradiate a parallax image 1 through the transmission type display panel, a convergence point is formed at the pupil of human eyes, and the parallax image 1 is clearly imaged on a 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, forms the same convergence point at the pupil of the human eye, and clearly images the parallax image 2 on the retina.
In this embodiment, the switching frequency of the polarization converter is 120HZ, which satisfies the persistence effect of human eyes, and a single eye obtains two parallax images, thereby realizing retina imaging from multiple viewpoints, providing a more accurate focusing cue for a viewer, and obtaining a more real visual experience.
The utility model discloses an on quadrature polaroid and polarized light converter project two parallax image chronologies to the retina of people's eye, form the stereoscopic display effect that the monocular was looked more, for the monocular provides abundanter degree of depth clue, has still realized the effect that virtual stereoscopic image and real environment stack show simultaneously.
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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113311583A (en) * | 2021-06-02 | 2021-08-27 | 西安邮电大学 | Near-to-eye display system with adjustable viewpoint parameters |
| CN115128811A (en) * | 2022-06-20 | 2022-09-30 | 中山大学 | Near-to-eye display module based on orthogonal characteristic pixel block |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113311583A (en) * | 2021-06-02 | 2021-08-27 | 西安邮电大学 | Near-to-eye display system with adjustable viewpoint parameters |
| CN115128811A (en) * | 2022-06-20 | 2022-09-30 | 中山大学 | Near-to-eye display module based on orthogonal characteristic pixel block |
| CN115128811B (en) * | 2022-06-20 | 2024-01-12 | 中山大学 | Near-to-eye display module based on orthogonal characteristic pixel blocks |
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