Optical: systems and elements – Holographic system or element – Hardware for producing a hologram
Reexamination Certificate
2006-09-26
2008-09-09
Cheng, Audrey Y. (Department: 2872)
Optical: systems and elements
Holographic system or element
Hardware for producing a hologram
C359S012000, C359S010000
Reexamination Certificate
active
07423792
ABSTRACT:
A single method and apparatus for producing many of the most common types of hologram from digital data is disclosed. The data are generated entirely by a computer as a 3-D (animated) model or from multiple 2-D camera images taken of a real 3-D (moving) object or scene from a plurality of different camera positions. The data are digitally processed and displayed on a small high resolution spatial light modulator (SLM). A compact low energy pulsed laser, is used to record composite holograms. The present invention permits the creation of restricted or full parallax master transmission or reflection type composite holograms, known as H1 holograms, that can be copied using traditional methods. Alternatively the same invention and apparatus permits the direct writing of hologram without the need to pass through the intermediate stage of the H1 transmission hologram.
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Brotherton-Ratcliffe David
Grichine Mikhail
Rodin Alexey
Vergnes Florian Michel Robert
Cheng Audrey Y.
Madan Mossman & Sriram P.C.
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