Method of bragg angle adjustments for copying holograms

Details Method of bragg angle adjustments for copying holograms Method of bragg angle adjustments for copying holograms

1983-10-11

1986-03-11

Arnold, Bruce Y.

G03H 120

Patent

active

045751927

ABSTRACT:
A method of copying a thick hologram, recorded at wavelength .lambda..sub.1, so that the copy can be efficiently read out with a beam .lambda..sub.3 at the same incident angle as used to efficiently read out the original. The method involves copying the hologram using wavelength .lambda..sub.2 at a predetermined incident angle, which incident angle provides fringe angles in the copy to yield maximum diffraction efficiency of the read-out beam .lambda..sub.3.

REFERENCES:
patent: 3639031 (1972-02-01), Lin
Caulfield, H. J., Handbook of Optical Holography, Academic Press, N.Y., 1, pp. 377-378.
Collier, R. J. et al., Optical Holography, Academic Press, 1971, pp. 228-264.
C. D. Leonard et al., "A Cook Book for Dichromated Gelatin Holograms" Technical Report T-79-17, U.S. Army Missile Research and Development Command, Jan. 1979.
B. J. Chang et al., "Dichromated Gelatin for the Fabrication of Holographic Optical Elements," Applied Optics, vol. 18, No. 14, Jul. 15, 1979, pp. 2407-2417.

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