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Optical structure of holographic 3D virtual reality glasses

A three-dimensional virtual and optical structure technology, applied in optics, optical components, instruments, etc., can solve problems such as the inconsistency between the interaction distance and the imaging distance, the three-dimensional sense is not realistic enough, and it cannot be adapted to the wearer, so as to achieve a good three-dimensional observation effect and observation The effect of short distance and low power requirements

Active Publication Date: 2019-12-06
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing virtual reality glasses use binocular parallax spectroscopic stereoscopic display technology. The disadvantages are that the stereoscopic effect is not realistic enough, the interaction distance is inconsistent with the imaging distance, and cannot be adapted to all wearers with pupillary distances, and the glasses are worn for a long time. It will cause dizziness, and virtual reality glasses with traditional imaging principles are prone to visual fatigue

Method used

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  • Optical structure of holographic 3D virtual reality glasses
  • Optical structure of holographic 3D virtual reality glasses
  • Optical structure of holographic 3D virtual reality glasses

Examples

Experimental program
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Effect test

Embodiment 1

[0027] In this example, see Figure 1~4 , a kind of optical structure of holographic three-dimensional virtual reality glasses, which mainly includes a readout light source 2 and two sets of optical path systems installed in the glasses frame 11, and the power supply supplies power for the readout light source 2 and two sets of optical path systems, wherein the first set of optical path systems and The second set of optical path systems is composed of a set of 4f system filtering structures using Fourier transform. The 4f system filtering structure using Fourier transform is mainly composed of an optical modulator 1 and an optical 4f system Fourier lens group. According to calculations, the two sets of optical path systems generate The imaging distance of the holographic image is different, and a three-dimensional holographic image is presented at different distances in front of the corresponding optical 4f system Fourier lens group. Through the corresponding eyepiece 7, the c...

Embodiment 2

[0039] This embodiment is basically the same as Embodiment 1, especially in that:

[0040] In this embodiment, each optical path system uses the transmissive optical modulator 1 to form the imaging optical path, so no light splitting structure is needed, and the structure is simpler and more compact. In the 4f system filtering structure using Fourier transform, the optical 4f system Fourier lens group is made up of a diaphragm 9 with a small hole and a convex lens assembly, the diaphragm 9 is arranged at the focal point of the first convex lens 13-1, and the The second convex lens 13-2 is arranged at the double focal length of the first convex lens 13-1 to form a 4f optical system. The diffracted image light emitted from the light modulator 1 enters the first convex lens 13-1, and then enters through the diaphragm 9 to the second convex lens 13-2, and then enter the observer's eye 8 through the eyepiece 7. The two sets of optical path systems correspond to the two three-dimens...

Embodiment 3

[0042] This embodiment is basically the same as the previous embodiment, and the special features are:

[0043] In this embodiment, the readout light source 2 adopts an LED lamp as a light source. Using a relatively low-power LED lamp as the light source does not require a beam expander, and improves the safety of the optical system on the premise of saving energy.

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Abstract

The invention discloses a holographic 3D virtual reality glasses optical structure. A hologram is borne on a spatial light modulator, light of a read light source is subjected to light beam adjustment to be parallel light beams to reproduce 3D images, read 3D images goes through an optical 4f system and an aperture with a small hole, a high order image is filtered, only a low order optimal image is maintained, and the light goes through a lens as an eye lens and then enters into an eye of people. Two sets of optical paths are employed and are corresponding to a left eye and a right eye of the people, and two generated 3D images enter into the left eye and the right eye of the people according to the observation habit of people. In order to allow an optical path system to be suitably worn on a head, the light beams are subjected to necessary reflection, and the system is integrated as a small size portable system, and a holographic true 3D virtual reality glasses system is formed. According to the holographic 3D virtual reality glasses optical structure, the 3D effect is more real, a problem of uncoordinated interaction distance and imaging distance is solved, due to the existence of a hologram viewing field angle, the differences of different individual pupil distances can be allowed, and a dizzy feeling is avoided.

Description

technical field [0001] The invention relates to a display, in particular to a holographic three-dimensional display, and to a wearable virtual reality glasses device, which is applied to the technical field of holographic display devices. Background technique [0002] Holographic glasses are a head-mounted display based on holographic display technology, which requires the use of holographic optical elements HOE, and its core component is a light modulator (Spatial Light Modulator, SLM). [0003] An optical modulator is an optical device that can modulate the spatial distribution of light waves. Its function is to change the amplitude, phase, polarization state and wavelength of light waves in space. The computer-made computational hologram CGH can be diffracted into a three-dimensional holographic image through transmission or reflection. [0004] Holographic display technology is an ultimate three-dimensional display technology, which is different from three-dimensional d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/01G02B27/22
CPCG02B27/0172G02B30/27G02B2027/0174G02B2027/0178
Inventor 高洪跃许凡周文郑志强姚秋香刘攀刘吉成
Owner SHANGHAI UNIV
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