Abstract

A simple and robust method for introducing a phase-shifting test procedure in a wedge-plate shearing interferometer is proposed. The output of the wedge-plate lateral shearing interferometer (LSI) is superposed onto a sinusoidal grating, forming a moiré pattern. The in-plane translation of grating perpendicular to the grating lines is used for introducing a known amount of phase shifts in the interferometer. Direct measurement of phase using a four-step phase-shifting method is undertaken. The applicability of this devised phase-shifting wedge-plate LSI has been successfully tested for setting the collimation position of optical beams. Good accuracy and precision are achieved.

© 2014 Optical Society of America

Simple phase-shifting method in a wedge-plate lateral-shearing interferometer

Jae Bong Song, Yun Woo Lee, In Won Lee, and Yong-Hee Lee
Appl. Opt. 43(20) 3989-3992 (2004)

Phase-shifting lateral shearing interferometer with two pairs of wedge plates

Hyun-Ho Lee, Jang-Hoon You, and Seung-Han Park
Opt. Lett. 28(22) 2243-2245 (2003)

Simple multifrequency and phase-shifting fringe-projection system based on two-wavelength lateral shearing interferometry for three-dimensional profilometry

Dalip Singh Mehta, Satish Kumar Dubey, M. Mosarraf Hossain, and Chandra Shakher
Appl. Opt. 44(35) 7515-7521 (2005)

Wedge-plate shearing interferometers for collimation testing: use of a moiré technique

J. Choi, Gerard M. Perera, M. D. Aggarwal, R. P. Shukla, and M. V. Mantravadi
Appl. Opt. 34(19) 3628-3638 (1995)

Thickness measurement of transparent glass plates using a lateral shearing cyclic path optical configuration setup and polarization phase shifting interferometry

Y. Pavan Kumar and Sanjib Chatterjee
Appl. Opt. 49(33) 6552-6557 (2010)