Hologram recording/reproducing device and...

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C369S112020

Reexamination Certificate

active

07965607

ABSTRACT:
A hologram recording/reproducing device includes a recording/reproducing optical unit performing recording and reproducing operations on a hologram recording/reproducing medium. The optical unit includes a laser light source emitting laser light; a spatial-light modulator generating signal light and reference light from the laser light, the signal light and reference light having a common light path; a phase mask disposed near the modulator or in a conjugate plane of the modulator and transmitting at least the reference light; and an objective lens including a first lens portion and a second lens portion. The first lens portion is disposed at an inner peripheral portion of the objective lens and serves as a Fourier transformation lens focusing the signal light to a predetermined point. The second lens portion is disposed at an outer peripheral portion of the objective lens and has focuses continuously or discretely disposed in an optical-axis direction of the objective lens and at portions in the medium near the predetermined point.

REFERENCES:
patent: 4224480 (1980-09-01), Satoh et al.
patent: 5719691 (1998-02-01), Curtis et al.
patent: 5943145 (1999-08-01), Curtis et al.
patent: 6108110 (2000-08-01), Orlov et al.
patent: 2002/0085250 (2002-07-01), Kim et al.
patent: 2005/0141388 (2005-06-01), Yamatsu
patent: 2005/0185234 (2005-08-01), Kim
patent: 2005/0226120 (2005-10-01), Nishiwaki et al.
patent: 2006/0013104 (2006-01-01), Kihara et al.
patent: 2001-194626 (2001-07-01), None
patent: 2005-234579 (2005-09-01), None
patent: 2005-241674 (2005-09-01), None
Holographic Media Coming Soon, Achievement of 200G Bits in 2006, Nikkei Electronics, pp. 106-114, Jan. 17, 2005.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Hologram recording/reproducing device and... 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/reproducing device and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hologram recording/reproducing device and... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2741027

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.