Reproducing method and reproducing apparatus for optical recordi

Details Reproducing method and reproducing apparatus for optical recordi Reproducing method and reproducing apparatus for optical recordi

1993-07-26

1995-03-14

Neyzari, Ali

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 47, G11B 1722

Patent

active

053982231

ABSTRACT:
A technique for improving a number of reproducible times in reproduction of information from an optical recording medium having a recording layer which reacts in a photon mode. The power of a reproducing beam is set in proximity to P.sub.rep (W) appearing in the following expression (I) or within a range of P.sub.rep (W) appearing in the following expression (II): ##EQU1## In order to improve an S-N ratio, squeezed light having suppressed photon number fluctuation is employed as a reproducing beam at need. If improvement of the number of reproducible times is in preference to improvement of the S-N ratio, such squeezed light having suppressed photon number fluctuation is employed as a reproducing beam with power which is set within a range of P.sub.rep (W) appearing in the following expression (III): ##EQU2##

REFERENCES:
patent: 3900842 (1975-08-01), Calabro et al.
patent: 5329512 (1994-07-01), Fukimoto et al.

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