LED is made of chip and lens with a certain dioptric radius to form a light emitting system. To make the most use of the light emitting property of LED to achieve the super function of the photoelectric sensor made of LED, it is important to make the opti
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洪汝渝.基于面积加权法的LED光轴测量[J].智能科学与工程学报,2005,(3): HONG Ru-yu. Optical axis measurement test of LED with area weighted method[J]. Journal of Chongqing Technology and Business University(Natural Science Edition),2005,(3):