Side lobe suppression in holograms using pre-exposure

Details Side lobe suppression in holograms using pre-exposure Side lobe suppression in holograms using pre-exposure

1984-12-21

1987-08-18

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Holographic process, composition, or product

Composition or product or process of making the same

430 1, 430271, 430273, 430274, 430289, 430327, 430394, 430494, G03C 166, G03C 502, G03H 106

Patent

active

046877207

ABSTRACT:
A holographic recording medium is treated to eliminate side lobes. The method involves exposing opposed surfaces of the medium with filtered incoherent light either before or after a holographic exposure with coherent light. The incoherent exposure produces controlled desensitization of the medium, resulting in a sensitivity profile which increases continuously to a maximum near the center of the layer. A hologram recorded in the layer has a refractive index modulation which is high in the center of the layer and which decreases toward the surfaces of the layer.

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