Optical: systems and elements – Holographic system or element – Hardware for producing a hologram
Reexamination Certificate
2011-08-30
2011-08-30
Chang, Audrey Y (Department: 2872)
Optical: systems and elements
Holographic system or element
Hardware for producing a hologram
C359S010000, C359S011000, C359S032000
Reexamination Certificate
active
08009341
ABSTRACT:
In a holographic information recording and reproducing apparatus, an optical fiber guides a reference beam toward a recording medium for holographic recording, and a precision rotator is turned, so that the reference beam is incident on the recording medium at different angles and interferes with a data-carrying signal beam to complete the recording of holographic information on the recording medium. To reproduce the holographic information, the optical fiber guides a reading beam, and the reading beam is incident on the recording medium at an angle the same as the reference beam for the recording to reproduce the holographic information stored on the recording medium. With the optical fiber and the precision rotator, a simplified light path system and a wide range of incident angles for the reference and reading beams may be achieved, and the transmissive, reflective, and 90-degree holographic storage techniques may be integrated in one single apparatus.
REFERENCES:
patent: 6330088 (2001-12-01), Klug et al.
patent: 6522433 (2003-02-01), Kelsey et al.
patent: 7079469 (2006-07-01), Itoh et al.
patent: 2002/0163680 (2002-11-01), Zabka
Chiang Don Yau
Hsieh Mei Li
Hsu Ken Yuh
Lin Shiuan Huei
Wang Jui Hsin
Bacon & Thomas PLLC
Chang Audrey Y
CMC Magnetics Corporation
National Chiao Tung University
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