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US 4,126,373 AGranted
Holographic identification elements and method and apparatus for manufacture thereof
AssigneeHoechst Aktiengesellschaft
InventorRoland Moraw
Life of this patent
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Abstract
An identification element having an integral holographic recording as part thereof and method and apparatus for manufacture. The identification element is formed using an interference pattern from an object and reference laser beam wherein information on the identification element forms the object to be recorded on light sensitive material which is firmly and durably combined with the identification element.
Claims18
A process for the manufacture of a holographic identification element comprising the steps of:
- (a) fixedly combining a light-sensitive recording material with an object carrying indicia thereon;
- (b) forming a reference beam and an object beam from a source of coherent light;
- (c) subsequent to step (a) directing said object beam onto said indicia of said object;
- (d) subsequent to step (c) directing the object beam reflected from the indicia of said object onto said light-sensitive recording material;
- and
- (e) simultaneously with step (d) directing said reference beam onto said light-sensitive recording material thereby producing a hologram of said indicia, whereby a holographic identification element is produced.
3 more elements
Dependencies are inferred from the claim text.