Sood Biswas, Nisha and Sarkar, Samir Kumar and Basuray, Amitabha (1996) Measurement of gradient refractive index profile using a birefringent lens. Optical Engineering, 35 (2). pp. 470-475. ISSN 0091-3286

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The shape, depth, and maximum change in refractive index profile are of the most important parameters to be controlled when developing gradient refractive index (GRIN) lens blanks. Generally refractive index profiles are measured by standard interferometers such as Mach-Zhender, Twyman, and Shearing interferometers. These methods generate a large amount of data and need rigorous computation. A new kind of deflectometery is reported that can measure a GRIN profile using the interference pattern generated by a birefringent lens. Results based on this method are presented for radial GRIN glasses developed by Ag+-Na+ and Na+-Li+ ion exchange in alkali aluminosilicate glasses. (C) 1996 Society of Photo-Optical Instrumentation Engineers.

Item Type: Article
Uncontrolled Keywords: Gradient refractive index profile; Birefringent lens; Deflectometry; Fringes
Subjects: Microstructure and Characterization
Divisions: Glass
Depositing User: Bidhan Chaudhuri
Date Deposited: 30 Jul 2012 10:12
Last Modified: 23 Mar 2016 13:13

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