Talbot moire deflectrometry with direct spatial reconstruction of optical phase

Angela Jianu; Adrian Petris; Carmen Popa; Dragos Popa; Valentin I. Vlad

doi:10.1117/12.312802

2 July 1998 Talbot moire deflectrometry with direct spatial reconstruction of optical phase

Angela Jianu, Adrian Petris, Carmen Popa, Dragos Popa, Valentin I. Vlad

Proceedings Volume 3405, ROMOPTO '97: Fifth Conference on Optics; (1998) https://doi.org/10.1117/12.312802
Event: ROMOPTO '97: Fifth Conference on Optics, 1997, Bucharest, Romania

Abstract

Improvements in Talbot-moire deflectometry are presented. A Talbot-moire interferometer, using a laser diode as light source, a single grating and a CCD camera, placed in one of the Talbot planes, was set-up. The computer yields a moire pattern by mixing the acquired Talbot image of the first grating with the reference generated by computer or stored as an undisturbed external grating Talbot image. For moire pattern processing, direct spatial reconstruction of optical phase, in spatial and Fourier domains, implemented in a high-level image processing language (IDL^TM), was employed. The theoretical limit of the relative error of Talbot-moire deflectometry was verified by measuring the focal length of a lenticular system with controlled-focal- length.

Citation Download Citation

Angela Jianu, Adrian Petris, Carmen Popa, Dragos Popa, and Valentin I. Vlad "Talbot moire deflectrometry with direct spatial reconstruction of optical phase", Proc. SPIE 3405, ROMOPTO '97: Fifth Conference on Optics, (2 July 1998); https://doi.org/10.1117/12.312802

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KEYWORDS

Moire patterns

Deflectometry

Image processing

Refractive index

Cameras

CCD cameras

Ronchi rulings

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