1 November 1992 Incidence angle reducer for holgraphic optical elements used to improve laser detection systems
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Abstract
How special reflective devices reduce the angle of incidence of a laser beam irradiating a surface with the ability to decrease the incidence angle over a wide range of angles is described. To optimize the diffraction efficiency of a focusing holographic optical element (HOE), spread of the angle of incidence of an incoming laser beam about a preferred angle should be small. There is a constraint with thick HOEs in which a Bragg effect condition must be satisfied to achieve high diffraction efficiency. Angle reduction and applications of military interest are discussed. Ways to couple a reflection angle reducer component and an HOE to a photographic or TV camera are suggested.
Kenneth G. Leib, Kenneth G. Leib, Benjamin J. Pernick, Benjamin J. Pernick, } "Incidence angle reducer for holgraphic optical elements used to improve laser detection systems," Optical Engineering 31(11), (1 November 1992). https://doi.org/10.1117/12.59990 . Submission:
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