Cone array of Fourier lenses for contouring applications

Details Cone array of Fourier lenses for contouring applications Cone array of Fourier lenses for contouring applications

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991spie.1527..210g&link_type=abstract

Proc. SPIE Vol. 1527, p. 210-215, Current Developments in Optical Design and Optical Engineering, Robert E. Fischer; Warren J. S

Physics

Scientific paper

An application of Fourier transform lenses to surface topography detection is investigated. The field is illuminated in parallel using an array of three different wavelength laser diodes, and relative phase alteration is read out between cross-correlated electronic pixels. Diffraction theory of image formation is used to interpret the modulation in contrast. Speckle sensitivity to wavelength provides the basic technique for noise filtering.

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