Laser differential confocal lens refractive index measurement

被引:5
|
作者
Zhao, Weiqian [1 ]
Wang, Yun [1 ]
Qiu, Lirong [1 ]
Guo, Haorong [1 ]
机构
[1] Beijing Inst Technol, Key Lab Photoelect Imaging Technol & Syst, Minist Educ China, Optoelect Coll, Beijing 100081, Peoples R China
基金
美国国家科学基金会;
关键词
PARAMETERS;
D O I
10.1364/AO.50.004769
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A new laser differential confocal lens refractive index measurement is proposed, which uses the absolute zero of the differential confocal axial intensity curve to precisely identify the positions of the objective when the measurement pencil is focused on the vertex of the test lens and the reflector with or without the test lens in the measurement light-path, and then uses aberration compensation and ray tracing facet iterative calculation to obtain the refractive index of the test lens, thereby achieving the high-precision noncontact measurement of lens refractive index. The theoretical analyses and preliminary experiments indicate that the accuracy of the approach can reach about 2.5 x 10(-4). (C) 2011 Optical Society of America
引用
收藏
页码:4769 / 4778
页数:10
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