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].重庆工商大学学报(自然科学版),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):