Multi-element prism for optical heads

Details Multi-element prism for optical heads Multi-element prism for optical heads

1996-10-31

1998-06-02

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369112, G11B 7085

Patent

active

057611629

ABSTRACT:
An apparatus for providing focus and tracking error signals for controlling an application of a radiation beam to a data track of an optical storage medium is disclosed. The present invention describes a multi-element optical prism having at least four separator elements with each separator element engaging at least three other separator elements and at least two separator elements surrounding two inner separator elements and engaging each other at spaced apart positions. This apparatus permits a single return path, a reduced cross talk between focus and tracking error signals, and a reduced track offset.

REFERENCES:
patent: 4712205 (1987-12-01), Smid et al.
patent: 5406541 (1995-04-01), Kay
patent: 5491675 (1996-02-01), Kay
patent: 5623462 (1997-04-01), Tezuka et al.
M.R. Latta et al., "Effect of Track Crossing on Focus Servo Signals: Feedthrough," SPIE Proceedings, vol. 1663, Optical Data Storage, 1992.
R. Katayama et al., "Multi-beam magneto-optical disk drive for parallel read/write operation," SPIE Proceedings, vol. 1078, Optical Data Storage Topical Meeting, Jan. 17-19, 1989.
Pp. 172-179 of A. Marchant, "Optical Recording: A Technical Overview," Addison-Wesley, Reading, Mass.

Affiliated with

Also associated with

Rating

Multi-element prism for optical heads does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-element prism for optical heads, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-element prism for optical heads will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1469070