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Proceedings Paper

Cone array of Fourier lenses for contouring applications
Author(s): Ervin Goldfain
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Paper Abstract

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.

Paper Details

Date Published: 1 December 1991
PDF: 6 pages
Proc. SPIE 1527, Current Developments in Optical Design and Optical Engineering, (1 December 1991); doi: 10.1117/12.48651
Show Author Affiliations
Ervin Goldfain, Welch Allyn Inc. (United States)


Published in SPIE Proceedings Vol. 1527:
Current Developments in Optical Design and Optical Engineering
Robert E. Fischer; Warren J. Smith, Editor(s)

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