【摘要】 本文采用聚焦法,利用数字式选行器和采样保持器降低数据传输率,将光功率分布以电视视频信号的形式输入微型计算机,实现了预制棒折射率分布的自动化测量。更多还原

【Abstract】 This paper describes a measurement device based on the focusing method for refractive-index profiling of preforms. First, the intensity distribution of the transmitted light is detected by using a TV camera. Then, the TV singals are digitized to 12 bits and inputted to a micro-computer with the aid of a digital selector and a sampling holder. Finally, the refractive-index profile of the preform is obtained by processing the singals.更多还原