Holographic optical head

Details Holographic optical head Holographic optical head

1995-06-28

1998-05-26

Huber, Paul W.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369109, 369112, 369 4414, 369 4424, G11B 700

Patent

active

057577544

ABSTRACT:
A light beam emitted from a semiconductor laser element is collimated by a collimating lens, and is applied to an optical disk through a polarizing holographic beam splitter, a .lambda./4 plate and an objective lens, a light beam reflected by the optical disk is applied to the polarizing holographic beam splitter and is diffracted. Diffracted light beams of +1st order and -1st order are applied to two photodetectors, and a focus error signal is obtained on the basis of the diffracted light beam of +1st order and a tracking error signal is obtained on the basis of the diffracted light beam of -1st order.

REFERENCES:
patent: 4929823 (1990-05-01), Kato et al.
patent: 4945529 (1990-07-01), Omo et al.
patent: 5168485 (1992-12-01), Lehureau et al.
patent: 5231620 (1993-07-01), Ohuchida
patent: 5233444 (1993-08-01), Musha et al.
patent: 5367403 (1994-11-01), Yamamoto et al.
patent: 5406543 (1995-04-01), Kobayahsi et al.
patent: 5495461 (1996-02-01), Komma et al.

Affiliated with

Also associated with

Rating

Holographic optical head does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Holographic optical head, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Holographic optical head will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1971738