Metamaterial motion-sensing holographic element and design method thereof

A holographic element and design method technology, applied in the fields of micro-nano optics and optical holography, can solve the problems of difficulty in improving the image signal-to-noise ratio, troublesome device duplication, process complexity, etc. simple effect

Active Publication Date: 2016-01-27
CHINA INFORMATION COMM TECH GRP CORP
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Problems solved by technology

At present, the binary step structure with only one depth value is most commonly used, and its manufacturing process and replication technology are relatively simple; but because there are only two simple phase adjustment functions of 0 and π, its image signal-to-noise ratio (SNR) It is difficult to improve, so it puts great pressure on the subsequent narrow-band filtering, image processing, etc.
Holographic el

Method used

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  • Metamaterial motion-sensing holographic element and design method thereof
  • Metamaterial motion-sensing holographic element and design method thereof
  • Metamaterial motion-sensing holographic element and design method thereof

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Embodiment Construction

[0049]The technical solutions and technical effects of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0050] Somatosensory holographic elements need to divide the incident beam into a discrete array of random light spots in a set pattern, so a diffractive optical element designed with a periodic structure is required to generate separate diffraction orders. The somatosensory holographic element of the present invention adopts a periodic arrangement structure. In this embodiment, the somatosensory holographic element works in the projection mode.

[0051] figure 1 It is a schematic structural diagram of the silicon nanobrick array unit of the somatosensory holographic element in this embodiment, wherein, 1 represents a silicon nanobrick, and 2 represents a substrate; L is the length of the silicon nanobrick 1, W is the width of the silicon nanobrick 1, and H is The height of the silicon nano-bric...

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Abstract

The invention discloses a metamaterial motion-sensing holographic element and a design method thereof. The motion-sensing holographic element comprises a substrate, and periodically distributed silicon nano brick array units are etched on the work face of the substrate. The sizes of silicon nano bricks in the silicon nano brick array units are equal, the orientation angle phi(x,y) of the silicon nano bricks is theta(x,y)/2, theta(x,y) is the phase of corresponding pixels (x,y) of the silicon nano bricks, and center gaps between adjacent silicon nano bricks in the x direction and the y direction are equal. By means of the element and the design method, continuous phase modulation can be achieved on incident light. The process is simple, and the element has the outstanding advantages of being excellent in performance, high in stability, good in reliability, easy to manufacture and the like.

Description

technical field [0001] The invention belongs to the technical field of micro-nano optics and optical holography, and in particular relates to a metamaterial somatosensory holographic element and a design method thereof. Background technique [0002] Somatosensory technology is an active human motion recognition technology that has been popular in recent years. It uses optical cameras and image processing algorithms to quickly identify the characteristics of human movement. It can be applied to somatosensory games, human-computer interaction, video Important science and technology in the fields of monitoring and intelligent perception. The image in the somatosensory technology is not a simple scene image, but uses holographic technology to irradiate a beam of collimated laser light on the holographic element, and then forms a random array of light spots on the human body. The image processing algorithm recognizes human body movements in the image. It is the identification of...

Claims

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Application Information

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IPC IPC(8): G02B5/32G02B27/22G03H1/08
CPCG02B5/32G02B30/00G03H1/08
Inventor 郑国兴李子乐何平安李松田昕周辉张霜
Owner CHINA INFORMATION COMM TECH GRP CORP
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