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

Temporal phase unwrapping: application to surface profiling of discontinuous objects

Not Accessible

Your library or personal account may give you access

Abstract

The recently proposed technique of temporal phase unwrapping has been used to analyze the phase maps from a projected-fringe phase-shifting surface profilometer. A sequence of maps is acquired while the fringe pitch is changed; the phase at each pixel is then unwrapped over time independently of the other pixels in the image to provide an absolute measure of surface height. The main advantage is that objects containing height discontinuities are profiled as easily as smooth ones. This contrasts with the conventional spatial phase-unwrapping approach for which the phase jump across a height discontinuity is indeterminate to an integral multiple of 2π. The error in height is shown to decrease inversely with the number of phase maps used.

© 1997 Optical Society of America

Full Article  |  PDF Article
More Like This
Temporal phase-unwrapping algorithm for automated interferogram analysis

J. M. Huntley and H. Saldner
Appl. Opt. 32(17) 3047-3052 (1993)

Error-reduction methods for shape measurement by temporal phase unwrapping

J. M. Huntley and H. O. Saldner
J. Opt. Soc. Am. A 14(12) 3188-3196 (1997)

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 (10)

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