Reflection holograms without transmission ghosts

Details Reflection holograms without transmission ghosts Reflection holograms without transmission ghosts

1991-06-26

1993-03-23

Lerner, Martin

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 22, 359 25, G02B 532, G03H 126, G03H 130

Patent

active

051969513

ABSTRACT:
A reflection hologram structure including a transparent substrate, and a pattern of shielded hologram containing regions and transparent regions disposed on the transparent substrate, the pattern being unresolvable to the viewer. The shielded hologram containing areas comprise hologram subregions and shielding subregions overlying the hologram subregions. The shielding subregions comprise for example, opaque regions or partially illumination transmissive regions.

REFERENCES:
patent: 3567305 (1971-03-01), Collier et al.
patent: 4094584 (1978-06-01), Hannan
patent: 4155627 (1979-05-01), Gale et al.
patent: 4547037 (1985-10-01), Case
patent: 4839250 (1989-06-01), Cowan

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