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Proceedings Paper

Blazed Holographic Gratings-Formation By Surface Waves And Replication By Metal Electroforming
Author(s): James J. Cowan
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Paper Abstract

The formation of a blazed holographic grating, using the interference of an ordinary plane wave with a surface wave is considered. The usual holographic recording arrangement has been modified such that a positive photoresist recording layer is coated on one face of a prism; one of the recording beams is totally reflected from the prism such that the surface wave thus formed enters the photoresist from the back side. The other recording beam also enters from the back side, but is an ordinary plane wave. The resulting interference fringes are inclined with respect to the normal. With this arrangement the profile can be contoured more precisely than usual and many variations in the shape of the profile are possible. Modifications of the method described here allow the formation of gratings on curved surfaces and in some cases correction for aberrations. Once a profile has been formed in this fashion in photoresist it is possible to replicate it exactly in a durable metal layer using electroforming techniques. Such gratings are applicable for use in specrometers where high beam intensities must be taken into account.

Paper Details

Date Published: 10 February 1981
PDF: 8 pages
Proc. SPIE 0240, Periodic Structures, Gratings, Moire Patterns, and Diffraction Phenomena I, (10 February 1981); doi: 10.1117/12.965627
Show Author Affiliations
James J. Cowan, Polaroid Corporation (United States)

Published in SPIE Proceedings Vol. 0240:
Periodic Structures, Gratings, Moire Patterns, and Diffraction Phenomena I
C. H. Chi; E. G. Loewen; C. L. O'Bryan III, Editor(s)

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