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

Digital speckle techniques for measuring light deflection profiles of inhomogeneous phase objects

Not Accessible

Your library or personal account may give you access

Abstract

Digital speckle pattern photography is applied to the measurement of light deflection profiles of inhomogeneous transparent objects by transmission of a He–Ne laser speckle field through the object. The speckles are recorded with a CCD camera, and the local displacements are evaluated by comparison of the deflected speckle field with the undeflected field by a digital cross-correlation technique. In this way a complete two-dimensional deflection field can be obtained from a single pair of CCD records. The basic technique and two experimental setups suitable for objects with a size larger than that of the CCD chip are described. These novel techniques are applied to determine profiles of the refractive index of a free-burning arc in air. In addition, a cinematographic setup is described, which allows the investigation of transient objects by means of a video tape recorder.

© 1997 Optical Society of America

Full Article  |  PDF Article
More Like This
Accuracy in electronic speckle photography

M. Sjödahl
Appl. Opt. 36(13) 2875-2885 (1997)

Automatic analysis of speckle photography fringes

M. Buendía, R. Cibrián, R. Salvador, C. Roldán, and J. M. Iñesta
Appl. Opt. 36(11) 2395-2400 (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 (11)

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 (4)

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