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

Two-wavelength Talbot effect and its application for three-dimensional step-height measurement

Not Accessible

Your library or personal account may give you access

Abstract

The phenomenon of Talbot self-image shift by changing the wavelength of the illuminating light is described and demonstrated experimentally. A periodic grating is illuminated by light with wavelengths λ1 and λ2 generated by two lasers, and the Talbot self-images are recorded along the longitudinal direction at individual wavelengths. The Talbot self-image shift due to the change in the wavelength of light is implemented for the measurement of the three-dimensional step height of a large discontinuous object without any phase ambiguity problem. Fourier-transform fringe analysis was used to determine the maximum contrast of the high-visibility bands for the measurement of the step height of the object. The main advantages of the proposed system are nonmechanical scanning, high stability because of its common path geometry, compactness, and a wide range of measurement as compared to interferometric three- dimensional profilers.

© 2006 Optical Society of America

Full Article  |  PDF Article
More Like This
Simultaneous three-dimensional step-height measurement and high-resolution tomographic imaging with a spectral interferometric microscope

Dalip Singh Mehta, Masaya Sugai, Hideki Hinosugi, Shohei Saito, Mitsuo Takeda, Takashi Kurokawa, Hideki Takahashi, Masahito Ando, Masataka Shishido, and Tetsuo Yoshizawa
Appl. Opt. 41(19) 3874-3885 (2002)

Step height measurement using two-wavelength phase-shifting interferometry

Katherine Creath
Appl. Opt. 26(14) 2810-2816 (1987)

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 (7)

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 (8)

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