Low noise transmission holographic optical element

Details Low noise transmission holographic optical element Low noise transmission holographic optical element

1992-10-28

1994-05-24

Ben, Loha

Optical: systems and elements

Holographic system or element

Having particular recording medium

359 15, 359 28, 430 1, G03H 102, G03H 104, G02B 532

Patent

active

053154177

ABSTRACT:
A holographic recording medium is treated to reduce or eliminate unwanted extraneous diffraction in a volume transmission hologram. Surface regions of the medium are desensitized either before or after a holographic recording to reduce the contrast of the holographic fringe pattern along the surfaces, and thereby to eliminate planar phase grating effects. Treatments include applying a burst of gas or vapor to the surface, irradiating the surfaces with highly absorbed incoherent light, thermally treating the recording medium.

REFERENCES:
patent: 3660090 (1972-05-01), Curran et al.
patent: 3967963 (1976-07-01), Graube
patent: 4022618 (1977-05-01), Bartolini et al.
patent: 4029507 (1977-06-01), Wehner et al.
patent: 4815800 (1989-03-01), Chern et al.
patent: 4904554 (1990-02-01), Wreede
patent: 4995685 (1991-02-01), Armstrong et al.
patent: 4996120 (1991-02-01), Smothers et al.
patent: 5015049 (1991-05-01), Chang

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