Kumar Y Pavan, Chatterjee Sanjib
Department of Atomic Energy, Raja Ramanna Centre for Advanced Technology, Government of India, Indore 452013, India.
Appl Opt. 2012 Jun 1;51(16):3533-7. doi: 10.1364/AO.51.003533.
We present a simple technique for simultaneous determination of refractive index and thickness of moderately thick plane-parallel transparent glass plates (GPs) using a cyclic path optical configuration (CPOC) setup and a wedge shear plate as lateral shearing interferometer. The CPOC setup is used to simultaneously focus the counterpropagating converging beams at a common point at its hypotenuse arm. The apparent thickness and real thickness of the test GP are determined by observing three retrocollimation positions of the GP surfaces with respect to the common focus point. The RI is obtained by dividing the real thickness with apparent thickness of the GP. Presented in this paper are the results obtained for a test GP with a thickness of 14.983 mm and a RI of 1.515.
我们提出了一种简单的技术，使用循环路径光学配置（CPOC）装置和楔形剪切板作为横向剪切干涉仪，同时测定中等厚度的平面平行透明玻璃板（GPs）的折射率和厚度。CPOC装置用于在其斜边臂的公共点同时聚焦反向传播的会聚光束。通过观察测试GP表面相对于公共焦点的三个回准直位置来确定测试GP的表观厚度和实际厚度。折射率通过将GP的实际厚度除以表观厚度获得。本文给出了厚度为14.983mm、折射率为1.515的测试GP的测量结果。
