Method and apparatus for initializing optical recording medium

Details Method and apparatus for initializing optical recording medium Method and apparatus for initializing optical recording medium

1997-02-14

2000-05-09

Angebranndt, Martin

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making named article

43027013, 369100, 369116, 369121, 3692754, G11B 724

Patent

active

06060221&

ABSTRACT:
In a method and an apparatus initializing an optical recording medium by irradiating a flash light. Walls are formed on a holder for holding the optical recording medium so as to adjoin an inner edge and an outer edge of the optical recording medium. When a flash light irradiates, a part of incident light which obliquely enters into an inner and an outer periphery regions of the optical recording medium is shaded by the walls. A quantity of the incident light incident on a unit area in each of the inner and outer periphery regions is less than that in a recording region between the inner and outer periphery regions. When temperature in the recording region reaches to an initializing temperature, the temperature in each of the inner and outer periphery regions is lower than the initializing temperature. So that neither cracks nor corrugations occur in a recording layer in the inner and outer regions.

REFERENCES:
patent: 3964910 (1976-06-01), Geist et al.
patent: 4293633 (1981-10-01), Huffey et al.
patent: 5684778 (1997-11-01), Yamada et al.
van der Grinten, "A History of Reflex Copying . . . " The Photographic Journal pp 579-583 & 586, Sep. 1938.

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