Computerized lateral-shear interferometer

Details Computerized lateral-shear interferometer Computerized lateral-shear interferometer

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3405..955h&link_type=abstract

Proc. SPIE Vol. 3405, p. 955-959, ROMOPTO '97: Fifth Conference on Optics, Valentin I. Vlad; Dan C. Dumitras; Eds.

Physics

Optics

Scientific paper

A lateral-shear interferometer, coupled with a computer for laser wavefront analysis, is described. A CCD camera is used to transfer the fringe images through a frame-grabber into a PC. 3D phase maps are obtained by fringe pattern processing using a new algorithm for direct spatial reconstruction of the optical phase. The program describes phase maps by Zernike polynomials yielding an analytical description of the wavefront aberration. A compact lateral-shear interferometer has been built using a laser diode as light source, a CCD camera and a rechargeable battery supply, which allows measurements in-situ, if necessary.

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