Optical: systems and elements – Holographic system or element – Using modulated or plural reference beams
Reexamination Certificate
2005-12-27
2005-12-27
Assaf, Fayez G. (Department: 2872)
Optical: systems and elements
Holographic system or element
Using modulated or plural reference beams
C359S011000, C359S030000, C359S028000, C369S103000, C365S125000
Reexamination Certificate
active
06980337
ABSTRACT:
A holographic apparatus includes a mask for modulating a signal beam to generate a modulated signal beam; a conical prism, which has a cone portion and a base portion, for refracting a reference beam to generate a refracted reference beam, wherein the refracted reference beam interferes with the modulated signal beam in a holographic medium to thereby record data thereon, the base portion facing the holographic medium. The holographic apparatus can be miniaturized by a positional relationship between the conical prism and the holographic medium.
REFERENCES:
patent: 4790612 (1988-12-01), Dickson
patent: 2003/0161246 (2003-08-01), Chuang
patent: 2004/0190358 (2004-09-01), Cho
patent: 2004-127352 (2004-04-01), None
Assaf Fayez G.
Bacon & Thomas PLLC
Daewoo Electronics Corp.
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