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US 4,076,371 AGranted
Holographic recording material for infrared radiation
AssigneeMax-Planck-Gesellschaft zur Forderung der Wissenschaften e.V.
InventorsWerner Braun, Gernot Decker, Horst Rohr
Life of this patent
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Abstract
A composite material for recording holograms with infrared radiation. The terial includes a substrate and an IR-absorbing recording layer. Infrared radiation is absorbed by the recording layer whereupon the optical thickness of recording layer is changed in the areas exposed to infrared radiation.
Claims3
A method for recording holograms, comprising the steps of:
- providing a substrate:
- providing on said substrate a single layer, said layer consisting of substantially pure gelatin capable of absorbing infrared radiation and having a thickness which is greater than the change in thickness caused by the contemplated exposure to the infrared radiation;
- generating a holographic pattern using infrared laser radiation;
- and
- exposing the layer to the holographic patterned infrared laser radiation to cause changes in the optical thickness thereof.
2 more elements
Dependencies are inferred from the claim text.