Magneto-optical recording and/or reproducing device

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

369 4428, 369 4441, 369116, 369112, G11B 7085

Patent

active

053751094

ABSTRACT:
The two sets of data stored in pits and a magneto-optical layer of an optical recording/reproducing device can be read separately by the use of two lasers. The laser which reads/records the data stored in the pits operates at a wavelength .lambda..sub.1 approximately four times the depth of the pits. The laser which reads/records the data stored in the magneto-optical layer operates at a wavelength .lambda..sub.2 approximately twice the depth of the pits. The wavelength of the laser which reads the magneto-optical layer is adjusted and interference between the two signals is avoided.

REFERENCES:
patent: 4893298 (1990-01-01), Pasman et al.
patent: 4918679 (1990-04-01), Opheij et al.
patent: 5014253 (1991-05-01), Morimoto et al.
patent: 5191571 (1993-03-01), Fukumoto et al.
Nakamura et al, "Compact two-beam head with a hybrid two-wavelength laser array for magneto-optic recording" Japanese Journal of Applied Physics, Supplements, vol. 26, No. 26-4, 1987, Tokyo Japan, pp. 117-120.
Patent Abstracts of Japan, vol. 11 No. 37 (P-543) (2484), 4 Feb. 1987 & JP-A-61 206947 (Nippon Kogaku K.K.) 13 Sep. 1986.
Patent Abstracts of Japan, vol. 11 No. 112 (P-565) (2559), 9 Apr. 1987 & JP-A-61 206436 (Ricoh Co Ltd) 18 Nov. 1986.
Patent Abstracts of Japan, vol. 10 No. 160 (P-465) (2216), 7 Jun. 1986 & JP-A-61 013458 (Hitachi Seisakusho K.K.) 21 Jan. 1986.
Patent Abstracts of Japan, vol. 10 No. 202 (P-477) (2258), 15 Jul. 1986 & JP-A-61 042738 (Hikari Yokoekawa) 1 Mar. 1986.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Magneto-optical recording and/or reproducing device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magneto-optical recording and/or reproducing device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magneto-optical recording and/or reproducing device will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2389579

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.