Method of use for an optical recording disk with a dye-containin

Details Method of use for an optical recording disk with a dye-containin Method of use for an optical recording disk with a dye-containin

1993-12-17

1995-09-05

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

3692754, G11B 7007

Patent

active

054485410

ABSTRACT:
With a dye recording layer having an index of refraction n of 2.0 to 2.6 formed on a substrate, that portion of the recording layer disposed in a groove is used as a recording track by restricting the groove to a width W.sub.G of 0.38 to 0.45 .mu.m and a depth D.sub.G of 1000 to 1700 .ANG. and that portion of the recording layer in the groove to a thickness T.sub.G of at least 2000 .ANG. for 2.0.ltoreq.n.ltoreq.2.3 or to W.sub.G of 0.38 to 0.45 .mu.m, D.sub.G of 1000 to 2300 .ANG., and T.sub.G of at least 2500 .ANG. for 2.3<n.ltoreq.2.6. Reproduction is performed by means of a CD player which is adapted to perform tracking control by detecting a tracking error signal by the differential phase technique. There is obtained a tracking control loop gain of -2 dB or higher relative to that of commercially available CD, ensuring stable and accurate tracking control.

REFERENCES:
patent: 4931336 (1990-06-01), Haneda
patent: 5060216 (1991-10-01), Suzuki et al.
patent: 5075147 (1991-12-01), Vsami et al.
patent: 5080946 (1992-01-01), Takagis et al.
patent: 5090009 (1992-02-01), Hamada et al.
National Technical Report; vol. 32, No. 4; 4 Aug. 1986.
Nikkei Electronics; Jan. 23, 1989 (No. 465); p. 107 The Functional Dye Department of the Kinki Chemical Society; Mar. 3, 1989; pp. 15-20.
SPIE; vol. 1078; Optical Recording Topical Meeting (1989); pp. 80-87.

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