VR eyeshade and manufacturing method of holographic display element
A holographic display and manufacturing method technology, applied in optical components, instruments, optics, etc., can solve problems such as small visual range and inability to see images, and achieve the effect of improving product performance and increasing visual range
Active Publication Date: 2020-11-13
CHANGZHOU RAYTECH OPTRONICS CO LTD
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Problems solved by technology
However, the human eye can only see the image at the converging point of the reflected light of the holographic display element. When the human eye moves to other areas, the image cannot be seen, that is, the visual range is relatively small
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[0035] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.
[0036] refer to Figure 1 to Figure 4 , Figure 1 to Figure 3 They all illustrate that in the manufacturing method of the holographic display element according to an embodiment of the present invention, the reference beam 20 is incident on the first surface 11 of the holographic material...
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The invention relates to a VR eyeshade and a manufacturing method of a holographic display element. The method comprises the following steps: providing a holographic material, wherein the reference light beam is incident on the first surface of the holographic material at a preset incident angle relative to the holographic material; at least two concentric light beams are emitted from different positions and incident on the second surface of the holographic material, and when the concentric light beams are incident on the second surface of the holographic material, the concentric light beams and the reference light beams are subjected to interference exposure to form a holographic grating. When the image source light is incident on the second surface of the holographic display element, theholographic grating has a memory function on the light angle of the concentric light beam, image source light rays can be reflected outwards according to the opposite direction of the concentric light beam incident on the second surface of the holographic material to form reflected light rays, that is to say, the image source can be reflected to at least two different positions, that is, the image source can be generated at different positions, which is equivalent to off-axis exit pupil expansion, the visual range of human eyes is greatly increased, and the product performance is improved.
Description
technical field [0001] The invention relates to the technical field of holographic display, in particular to a method for manufacturing a VR eye mask and a holographic display element. Background technique [0002] VR goggles belong to virtual reality head-mounted display devices, which use head-mounted display devices to close people's vision and hearing to the outside world, and guide users to have a feeling of being in a virtual environment. The display principle is that glasses films are pasted on the left and right lenses, and the glasses films specifically use holographic display elements. There is also an image source in the VR goggle, and the image source injects the light source on the holographic display elements. For the storage and recording function of the object light, the holographic display element reflects the reflected light of the image source in the opposite direction of the object light, gathers the reflected light to a point, and enters the retina of th...
Claims
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IPC IPC(8): G03H1/12G02B27/01G02B30/00
CPCG03H1/12G02B27/0172G02B30/00G03H2001/0088
Inventor 张必明
Owner CHANGZHOU RAYTECH OPTRONICS CO LTD