Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1998-04-30
2000-09-26
Hindi, Nabil
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369110, G11B 700
Patent
active
061250910
ABSTRACT:
An optical pickup apparatus comprises a first semiconductor laser, a first beam splitter which partially reflects or transmits a laser beam generated by the first semiconductor laser in a given direction, a second semiconductor laser which emits a laser beam having a different wave length from the laser beam of the first semiconductor laser, a second beam splitter which partially reflects or transmits the laser beam generated by the second semiconductor laser in a given direction, a single photodetector which receives laser beams from the first and second semiconductor lasers when the laser beams are reflected by a recording medium, and a first reflective portion which is formed on the first beam splitter. The first reflective portion partially reflects a given polarized light beam from the first semiconductor laser and transmits a polarized light beam from the second semiconductor laser beam, which differs from the given polarized light beam. A second reflective portion is formed on the second beam splitter. The second reflective portion partially reflects a given polarized light beam from the second semiconductor laser and transmits a polarized light beam from the first semiconductor laser beam, which differs from the given polarized light beam.
REFERENCES:
patent: 4908813 (1990-03-01), Ojima et al.
patent: 5627814 (1997-05-01), Lee
patent: 5661711 (1997-08-01), Tanaka et al.
patent: 5793734 (1998-08-01), Tsuchiya et al.
patent: 5835472 (1998-11-01), Horie et al.
patent: 5856965 (1999-06-01), Tsuchiya et al.
patent: 5933401 (1999-08-01), Lee et al.
patent: 5974020 (1999-10-01), Ju et al.
patent: 5999509 (1999-12-01), Sugiura et al.
Hindi Nabil
Sankyo Seiki Mfg Co., Ltd.
LandOfFree
Optical pickup apparatus for use with various types of optical d does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical pickup apparatus for use with various types of optical d, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pickup apparatus for use with various types of optical d will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2106100