High density optical head assembly

Details High density optical head assembly High density optical head assembly

1997-01-13

1998-07-14

Hindi, Nabil

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4423, 369110, G11B 700

Patent

active

057815240

ABSTRACT:
A magneto-optical (MO) head has a pair of Faraday rotators between a polarizing beam splitter (PBS) and an objective lens for focusing light onto a MO disk. The pair of Faraday rotators rotate the direction of polarization of the light by 90.degree. or pass the same as it is depending on the data area where data are read by the optical head. This enables the MO head for reproducing data recorded by a land-groove technique to reduce output level difference and cross-talk between a land area and a groove area, thereby improving C/N of the reproduced signal.

REFERENCES:
patent: 4451863 (1984-05-01), Yanagida et al.
patent: 4507773 (1985-03-01), McCann et al.
patent: 5237549 (1993-08-01), Shimozawa
patent: 5381395 (1995-01-01), Okada
patent: 5418774 (1995-05-01), O'Hara et al.
patent: 5432760 (1995-07-01), Yoshizawa et al.
"High Track Density Magneto-Optical Recording using a Crosstalk Canceler" Kayanuma et al. SPIE vol. 1316 Optical Data Storage (1990); pp. 35-39.
"Mo System Using a Short Wavelength Light Source" Fukumoto et al Proceedings of magneto-Optical Recording International Symposium; '94, J. Magn. Soc. Jpn., vol. 19; Supplement No. S1(1995) pp. 295-300.

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1890287