Optical: systems and elements – Holographic system or element – Using modulated or plural reference beams
Reexamination Certificate
2006-02-22
2009-11-10
Allen, Stephone B (Department: 2872)
Optical: systems and elements
Holographic system or element
Using modulated or plural reference beams
C359S001000, C359S032000
Reexamination Certificate
active
07616362
ABSTRACT:
A hologram recording and reproducing apparatus includes a movable galvanomirror, a mirror controller and a reproduction unit. The galvanomirror guides a reference beam toward a hologram recording medium and changes the incident angle of the reference beam. The mirror controller causes the galvanomirror to move for adjusting the incident angle to a predetermined angle for hologram recording. In reproducing the recorded information, the mirror controller causes the galvanomirror to move, so that the incident angle continuously changes within a predetermined range including the predetermined angle. The reproduction unit receives a detection signal from an optical detector while the incident angle changes continuously. The detection signal corresponds to the intensity of a reflected beam from the hologram recording medium. The reproduction unit reproduces the recorded information, based on the detection signal, when the intensity of the reflected beam is over a predetermined level or reaches the maximum.
REFERENCES:
patent: 5777760 (1998-07-01), Hays et al.
patent: 5822090 (1998-10-01), Wilde
patent: 5838650 (1998-11-01), Campbell et al.
patent: 5850299 (1998-12-01), Lande et al.
patent: 5920536 (1999-07-01), Campbell et al.
patent: 6414763 (2002-07-01), Hesselink et al.
patent: 6490061 (2002-12-01), Tanaka et al.
patent: 6721076 (2004-04-01), King et al.
patent: 7251066 (2007-07-01), Chao et al.
patent: 2002/0075776 (2002-06-01), Kasazumi et al.
patent: 2003/0223101 (2003-12-01), Curtis et al.
patent: 10-97792 (1998-04-01), None
patent: 2002-216359 (2002-08-01), None
patent: WO 2004/112045 (2004-12-01), None
Tezuka Kouichi
Uno Kazushi
Yoshikawa Hiroyasu
Allen Stephone B
Callaway Jade R
Fujitsu Limited
Fujitsu Patent Center
LandOfFree
Hologram recording and reproducing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hologram recording and reproducing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hologram recording and reproducing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4062852