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Design method for uniform illumination of LED structural light source

A technology of LED structure and design method, applied in optics, optical components, instruments, etc., to achieve the effect of improving detection performance, broad industrial application prospects, and convenient use

Inactive Publication Date: 2019-08-06
SHANTOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, how to design and optimize LED array structured light sources is rarely mentioned in the literature

Method used

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  • Design method for uniform illumination of LED structural light source
  • Design method for uniform illumination of LED structural light source
  • Design method for uniform illumination of LED structural light source

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Experimental program
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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings.

[0047] The present invention takes the red LED produced by Nichia Company as an example when establishing a single LED illumination model. The experimental results show that the circular light spot displayed after irradiation has the highest brightness at the center of the light spot, and the brightness gradually decreases along the radial direction. Based on this experiment, an illumination model of a single LED is established.

[0048] In order to facilitate the establishment of a single LED illumination model in the present invention, the following combination figure 1 Make necessary explanations.

[0049] Such as figure 1 As shown, the coordinate system O-X-Y is established, the point O(0,0) is the origin of the coordinate system, and the X-axis is along the horizontal direction;

[0050] Such as figure 1 As shown, in the two-dimensional coordinate system of O...

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Abstract

The invention relates to the field of machine vision, in particular to a design method for uniform illumination of a light-emitting diode (LED) structural light source. LED arrays in the design methodare not arranged on one same plane. According to the method, an illumination model of a single LED and a luminance equation and an irradiance angle equation at any specified point in the field of view of the model are provided; an illumination model of a plurality of same-color-light LEDs and luminance superposition characteristics of the plurality of same-color-light LEDs at any specified pointare provided; and a uniform illumination design model of an LED structural light source and a uniform illumination design method of an LED annular array structural light source are put forward. The design method can be further decomposed into two sub methods to simplify the design process and reduce the design difficulty. The light source design method can be widely applied to the design process of the structural light source and has broad industrial application prospects.

Description

technical field [0001] The invention relates to the field of machine vision, in particular to a design method for uniform illumination of an LED structured light source. Background technique [0002] Due to the constraints of image processing costs, the quality of the acquired images will affect the design of the detection algorithm, and will also affect the accuracy and reliability of the visual inspection system. Therefore, obtaining high-quality images has become an important part of the visual inspection system. In the active visual inspection system, through precise lighting structure design, the target information and background information in the detected image can be accurately separated. Usually, different measured objects require different light sources to highlight the target information and background information more clearly. Therefore, due to the diversity of the measured objects, the lighting design methods of the light source are also different. Monocular v...

Claims

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Application Information

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IPC IPC(8): G02B27/00
CPCG02B27/0012
Inventor 吴福培谢晓扬朱树锴
Owner SHANTOU UNIV
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