Optical pickup apparatus

Details Optical pickup apparatus Optical pickup apparatus

1993-03-01

1995-04-25

Chin, Tommy P.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369116, G11B 7135

Patent

active

054105293

ABSTRACT:
An optical pickup apparatus for reading out information from an optical disk. The optical pickup includes a light source; and an optical device having a grating pattern for splitting a light beam from said the source into a zero-order diffracted beam and plus and minus first-order diffracted beams. The grating pattern has the center portion and one or more side portions. The efficiency of the center portion for the zero-order diffracted beam is greater than the efficiency of the side portions for the zero-order diffracted beam.

REFERENCES:
patent: 4766585 (1988-08-01), Fukumoto et al.
patent: 4885734 (1989-12-01), Yuzo
patent: 4945529 (1990-07-01), Ono et al.

Affiliated with

Also associated with

Rating

Optical pickup 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 Optical pickup apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pickup apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1572823