Holographic interferometry using photorefractive crystals for quantitative phase measurement on large objects

Marc P. Georges; Philippe C. Lemaire

doi:10.1117/12.236068

25 March 1996 Holographic interferometry using photorefractive crystals for quantitative phase measurement on large objects

Marc P. Georges, Philippe C. Lemaire

Author Affiliations +

Proceedings Volume 2652, Practical Holography X; (1996) https://doi.org/10.1117/12.236068
Event: Electronic Imaging: Science and Technology, 1996, San Jose, CA, United States

Abstract

We recently have presented a real-time holographic interferometer using sillenite crystals connected with phase-shifting for quantitative measurement of diffuse objects deformations. In our basic set-up, the crystal, sandwiched between two polarizers, is set in front of the optical head and followed by a CCD camera with an imaging objective. With this system, for conventional objects and using 2.2 Watts of Ar3+ laser power 512 nm, interferograms can be observed on object fields of about 30 cm X 20 cm (crystal size 1 cm X 1 cm and 26 mm objective focal length). In this paper we present investigations to increase the observed field in the existing system and to be able to use lower power lasers. Since setting the object at larger distances should lead to an unsufficient luminous level for hologram recording, we have proceeded by different ways. First, we use shorter focal length objective, giving a larger field- of-view, and larger crystals have to be used in this case to avoid vignetting. Second, we use a large aperture frontal objective in order to collect more light and that images the object on the crystal, the final image being observed through relay imagery.

Citation Download Citation

Marc P. Georges and Philippe C. Lemaire "Holographic interferometry using photorefractive crystals for quantitative phase measurement on large objects", Proc. SPIE 2652, Practical Holography X, (25 March 1996); https://doi.org/10.1117/12.236068

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available