Low-magnification polarization phase-shifting interference microscope for three-dimensional profilometry

Nandini Ghosh; Sanjukta Sarkar; Kallol Bhattacharya

doi:10.1117/1.OE.51.8.085601

3 August 2012 Low-magnification polarization phase-shifting interference microscope for three-dimensional profilometry

Nandini Ghosh, Sanjukta Sarkar, Kallol Bhattacharya

Author Affiliations +

Funded by: Centre of Scientific and Industrial Research, Ministry of Human Resources, Government of India

Optical Engineering, Vol. 51, Issue 8, 085601 (August 2012). https://doi.org/10.1117/1.OE.51.8.085601

Abstract

An interferometric technique for three-dimensional phase measurement of optically transparent microscopic phase samples is presented. An obliquely aligned polarizer-masked cube beam-splitter, an infinity-corrected microscope objective, and a couple of simple polarization phase-shifting components serve as the setup for such a measurement. Surface phase profiles are then extracted using standard phase-shifting algorithms. The salient features of the proposed technique are its simple design, in-line configuration, possibility of integration with standard microscopic systems, and inherent compensation of the substrate phase. Experimental results are presented. The overall lateral magnification is restricted due to the low numerical aperture offered by the microscope objective and cube beam-splitter combination.

Citation Download Citation

Nandini Ghosh, Sanjukta Sarkar, and Kallol Bhattacharya "Low-magnification polarization phase-shifting interference microscope for three-dimensional profilometry," Optical Engineering 51(8), 085601 (3 August 2012). https://doi.org/10.1117/1.OE.51.8.085601

Published: 3 August 2012

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