Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1989-04-03
1992-10-06
Envall, Jr., Roy N.
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
369100, 369118, 369109, G11B 700
Patent
active
051538733
ABSTRACT:
Recording and/or reading of information on an optical record carrier is effected by scanning such record carrier with a radiation beam which is focussed by an objective lens into a scanning spot of a size which is diffraction-limited by the aperture of the objective lens. The effective size of the scanning spot is considerably reduced by including a layer of non-linear optical material in the record carrier, such material having an optical characteristic which changes with changes in intensity of the radiation incident thereon. The read/write resolution of information on the record carrier is thereby substantially increased.
REFERENCES:
patent: 4115809 (1978-09-01), Ueno
patent: 4242579 (1980-12-01), Bouwhuis
patent: 4414650 (1983-11-01), Ohta et al.
patent: 4460990 (1984-07-01), Opheij
patent: 4719615 (1988-01-01), Feyrer et al.
patent: 4771347 (1988-09-01), Horimai et al.
patent: 4792331 (1989-01-01), Watada et al.
patent: 4818666 (1989-04-01), Gravesteijn et al.
patent: 4853912 (1989-08-01), Akasaka et al.
patent: 4860274 (1989-08-01), Kobayashi
patent: 4965784 (1990-10-01), Land et al.
"Philips' Technical Review" 33 (1973) No. 7, pp. 178-180 and 186-189.
Translation of JP-63-81632.
Bouwhuis Gijsbertus
Holtslag Antonius H. M.
Spruit Johannes H. M.
van Uijen Cornelis M. J.
Envall Jr. Roy N.
Tran Thang V.
Treacy David R.
U.S. Philips Corporation
LandOfFree
Optical record carrier and method and apparatus for increasing t 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 record carrier and method and apparatus for increasing t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical record carrier and method and apparatus for increasing t will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1195922