Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

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

Not Accessible

Your library or personal account may give you access

Abstract

We propose a simple multifrequency spatial-carrier and phase-shifting fringe-projection system based on two-wavelength lateral shearing interferometry (LSI). In this system a wedge-shaped plate lateral shearing interferometer is used and, owing to the presence of tilt, a finite number of fringes parallel to the direction of the shear appears; hence a significant spatial-carrier frequency is generated at the focus position. We further enhance the spatial-carrier frequency either by changing the wavelength of the laser light or by slight defocusing. A synthetic interferogram with low spatial-carrier frequency is obtained by use of laser light of two wavelengths simultaneously in the lateral shear interferometer. We obtain the phase-shifted fringe patterns from the same setup by simply moving the wedge plate in an in-plane parallel direction, using a linear translator. The fringe projection system was tested for measurement of the three-dimensional shape of a discontinuous object. The present system has many advantages; e.g., it is a common-path interferometry and hence is insensitive to external vibrations, is compact in size, and is relatively inexpensive.

© 2005 Optical Society of America

Full Article  |  PDF Article
More Like This
Liquid-crystal phase-shifting lateral shearing interferometer with improved fringe contrast for 3D surface profilometry

Dalip Singh Mehta, Mohammad Inam, Jai Prakash, and A. M. Biradar
Appl. Opt. 52(25) 6119-6125 (2013)

Phase-shifting lateral shearing interferometry using wedge-plate and interferometric grating

Reena Disawal, Jitendra Dhanotia, and Shashi Prakash
Appl. Opt. 53(31) 7534-7539 (2014)

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)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (12)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved