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Detection method of spatial light modulator

A technology of spatial light modulator and detection method, which is applied in the direction of optical instrument testing, machine/structural component testing, instruments, etc., and can solve problems such as uneven picture and spatial light modulator not meeting product requirements, etc.

Active Publication Date: 2019-10-29
APPOTRONICS CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the modulation process of some pixels in the spatial light modulator is abnormal, the non-laser light source (bulb or LED) projection equipment is not sensitive to these pixel-level abnormalities due to its low contrast, and the spatial light modulator can be considered to be working normally. ; However, in laser or laser phosphor projection systems, the contrast is very high, and the abnormality of some pixels will lead to obvious unevenness of the picture, that is, the spatial light modulator does not meet the product requirements

Method used

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  • Detection method of spatial light modulator
  • Detection method of spatial light modulator
  • Detection method of spatial light modulator

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Embodiment Construction

[0036] The method for detecting the spatial light modulator proposed by the present invention can be used for the detection of the spatial light modulator on the production line of the laser fluorescence projection equipment. The detection of the spatial light modulator reduces the probability of problems in the projection equipment and improves the projection quality. Product reliability.

[0037] see Figure 4 and Figure 5 , Figure 4 is a flow chart of the detection method of the spatial light modulator of the present invention, Figure 5 is to use Figure 4 A schematic structural diagram of the detection device 100 of the detection method shown. The detection device 100 includes a light source 101 , an illumination system 102 , a spatial light modulator 103 , a projection lens 104 , a screen 105 , a photographing device 106 , and a data processing device 107 .

[0038] The detection method includes the following steps S1-S5.

[0039]Step S1, providing illumination l...

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Abstract

The invention relates to a detection method of a spatial light modulator. The detection method comprises the following steps: providing illumination light; allowing the spatial light modulator to receive the illumination light to generate image light, wherein the spatial light modulator comprising a plurality of modulation units; projecting the image light to generate a projection image, wherein aplurality of pixel points of the projection image are in one-to-one correspondence with the plurality of modulation units; shooting the projection image to generate a shot image; and analyzing deviation angles of the plurality of modulation units of the spatial light modulator according to the shot image.

Description

technical field [0001] The invention relates to a detection method of a spatial light modulator. Background technique [0002] Existing projection systems generally include a light source device, a spatial light modulator (such as an LCOS spatial light modulator or a DMD spatial light modulator) and a projection lens. The light source device emits light in three colors such as red, green and blue. The image data performs image modulation on the light emitted by the light source device, and the projection lens projects the image light output by the spatial light modulator to display the projected image. However, the existing projection system may have a low contrast ratio, There is a need to improve. [0003] In the projection system, the spatial light modulator as a signal modulation component directly determines the effect of the projected picture. Currently commonly used spatial light modulators are LCD and DMD. Starting from the working principle of the spatial light mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02
CPCG01M11/00G01M11/02H04N5/70
Inventor 郭祖强鲁宁李屹
Owner APPOTRONICS CORP LTD