Optical: systems and elements – Holographic system or element – Having multiple object beam or diffuse object illumination
Patent
1993-02-05
1994-09-13
Lerner, Martin
Optical: systems and elements
Holographic system or element
Having multiple object beam or diffuse object illumination
359 30, 359 34, G03H 104, G03H 102
Patent
active
053473760
ABSTRACT:
A method and apparatus for making a holographic shadowgram of an object are disclosed. The method and apparatus include a light source for generating and expanding a coherent light beam. The method and apparatus also include a reflector for reflecting the coherent light beam to simultaneously produce a diffuse object beam and a coherent reference beam such that differential vibration between the object and reference beams is substantially eliminated, and for illuminating the object with the object beam and creating an interference pattern between the object and reference beams. The method and apparatus further include a recorder for recording the interference pattern to produce the holographic shadowgram.
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Chen Hsuan S.
Wright Gregory A.
Lerner Martin
Saginaw Valley State University
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