Recording medium and information recording and reproducing appar

Details Recording medium and information recording and reproducing appar Recording medium and information recording and reproducing appar

1993-01-14

1994-07-19

Hannaher, Constantine

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692754, 369112, G11B 724

Patent

active

053316266

ABSTRACT:
A recording medium from which recorded information is reproduced by irradiating a read-out light, including an information recording surface and a plurality of information pits formed on the information recording surface. The information pits are formed by fine diffraction gratings having a grating constant (d) less than one half of the wavelength (.lambda.) of the read-out light. The fine diffraction gratings have a plurality of grating directions, each of the plurality of grating directions corresponding to the information to be recorded.

REFERENCES:
patent: 4586173 (1986-04-01), Ando
patent: 4868808 (1989-09-01), Tinet
patent: 5132953 (1992-07-01), Matsubayashi

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