Pseudo-random phase plates

Details Pseudo-random phase plates Pseudo-random phase plates

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4493..150e&link_type=abstract

Proc. SPIE Vol. 4493, p. 150-155, High-Resolution Wavefront Control: Methods, Devices, and Applications III, John D. Gonglewski;

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Well-characterized test conditions are essential for validating the engineering design of an adaptive optical system. A technique for fabricating high-resolution, well- characterized pseudo-random phase plates that addresses this need is described. Among other uses, these phase plates can be used to test adaptive optics systems under controlled conditions. Machining a surface whose relief height is proportional to the desired phase forms a pixellated phase plate. Using Lexitek's Near-Index-MatchTM approach, a sandwich of two materials is formed that produces the desired phase. Phase plates with 20 micron pixels have been fabricated using a 4096 X 4096 pixel grid. Results are presented.

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