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

Two-wavelength laser-diode interferometry that uses phase-shifting techniques

Not Accessible

Your library or personal account may give you access

Abstract

Two-wavelength phase-measuring interferometry with dual laser-diode sources has been developed that is based on a phase-shifting method that uses two wavelengths varied stepwise by separately changing the currents in two laser diodes. A synthetic wavelength is produced by the addition of two single-wavelength interferograms without the need for auxiliary techniques. The phases are equally shifted in opposite directions to each other on an unbalanced interferometer. The fringe shifts that result from modulated phases are monitored with an electronic sensor to ensure accuracy. Our experimental result shows measurements of the profile of a step object with a 4.6-μm synthetic wavelength.

© 1991 Optical Society of America

Full Article  |  PDF Article
More Like This
Two-wavelength phase-shifting interferometry insensitive to the intensity modulation of dual laser diodes

Ribun Onodera and Yukihiro Ishii
Appl. Opt. 33(22) 5052-5061 (1994)

Laser-diode phase-shifting interferometry with a self-pumped phase-conjugate mirror

Yukihiro Ishii and Ichiro Uehira
Opt. Lett. 18(17) 1459-1461 (1993)

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 (5)

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