Laser image speckle measurement system and measurement method based on human eye characteristics

A technology of measurement system and measurement method, which is applied in the field of laser image speckle measurement system, can solve the problems of measurement error and inconsistency of human eye perception, and achieve the effect of accurate measurement

Active Publication Date: 2018-08-31
HANGZHOU HONGSHI TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention intends to provide a laser image speckle measurement system and measurement method based on human eye characteristics to solve the measurement error caused by the inconsistency between camera imaging and human eye perception when using a camera instead of human eyes for speckle evaluation question

Method used

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  • Laser image speckle measurement system and measurement method based on human eye characteristics
  • Laser image speckle measurement system and measurement method based on human eye characteristics

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Experimental program
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Embodiment 1

[0035] Such as figure 1 as shown,

[0036] The laser display system for displaying laser images includes a laser display device light modulator 101, a laser display device projection lens 102, and a screen 103,

[0037] The laser image speckle measurement system based on human eye characteristics provided in this embodiment includes

[0038] A lens 104 for imaging the laser image onto the photosensitive element 105,

[0039] A photosensitive element 105 for imaging the laser image acquired by the lens, and obtaining imaging image data after imaging,

[0040] A data processor 106 for calculating data representing speckle features of the laser image according to the imaging image data,

[0041] The effective aperture of the lens 104 is the size of the pupil of the human eye, and the focal length of the lens 104 is the focal length of the human eye,

[0042] The pixel size of the photosensitive element 105 is similar to the size of retinal cells of the human eye, and the ligh...

Embodiment 2

[0051] Such as figure 2 As shown, the measurement method of laser image speckle based on human eye characteristics provided in this embodiment includes steps:

[0052] Use the lens to image the laser image onto the photosensitive element;

[0053] Use the photosensitive element to image the laser image acquired by the lens to obtain imaging image data;

[0054] calculating and obtaining data characterizing the speckle feature of the laser image according to the imaging image data;

[0055] The effective aperture of the lens is set to the size of the pupil of the human eye, the focal length of the lens is set to the focal length of the human eye,

[0056] The pixel size of the photosensitive element is selected to approximate the size of the retinal cells of the human eye, and the light intensity response curve of the photosensitive element is corrected to a curve approximately in line with the human eye's perception of light intensity.

[0057] in

[0058] The distance be...

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Abstract

The invention discloses a measuring system and method for laser image speckles based on human eye features. The measuring system comprises a lens, a photosensitive element and a data processor, wherein the lens is used for imaging a laser image onto the photosensitive element, the photosensitive element is used for imaging the laser image obtained by the lens, and the data processor is used for obtaining data for representing speckle characteristics of the laser image according to imaging image data. The effective aperture of the lens is the size of the human eye pupil, the focal length of the lens is the focal length of the human eye, the pixel size of the photosensitive element approximates the size of the human eye retina cells, and a light intensity response curve of the photosensitive element is approximately matched with the light intensity sensing curve of the human eye. According to the measuring system and method, measurement of the laser image speckles is more accurate, and no equipment cost needs to be added.

Description

technical field [0001] The invention relates to the field of laser display. More specifically, it relates to a measurement system and method for laser image speckle based on human eye characteristics. Background technique [0002] As a new display technology, laser display has outstanding advantages in color gamut, contrast, and brightness compared with traditional display technologies. However, due to the coherence of laser light in laser display, there are interference patterns of granular distribution on the screen, which seriously reduces the image quality of laser display. Therefore, it is necessary to accurately measure the laser speckle characteristics of the laser display device, such as speckle contrast and speckle particle size, in order to objectively evaluate the performance index of the laser display device. Laser speckle can be divided into primary speckle and secondary speckle according to the imaging position. The primary speckle is the speckle formed by t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00G01M11/02
Inventor 孙敏远毕勇张文平刘新厚王东周王栋栋高伟男
Owner HANGZHOU HONGSHI TECH
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