Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Patent
1982-12-17
1986-04-22
Brammer, Jack P.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
428 64, 428195, 428913, 346 76L, 3461351, 430523, 430945, 430961, 427160, G03C 168, G02B 2722
Patent
active
045842590
ABSTRACT:
An optical data storage system is contemplated, one employing a data-modulated writing laser beam and a non-erasing reading laser beam of predetermined wavelength.
Improved optical media for such systems are described, these characterized by multiple layers whose optical characteristics and thickness are chosen to accommodate a prescribed writing and reading energy and wavelength and so provide an "anti-reflection" condition for unrecorded portions of the medium and a relatively higher reflectivity for recorded portions. A preferred optical medium includes a highly reflective aluminum layer, a relatively transparent polymer spacer layer overlying the reflective layer, and an optical absorber (recording) layer overlying the spacer layer.
Overcoating structure is specified in some detail; e.g., as a "soft pad" layer (e.g., fluoropolymer) on the absorber, with a "Hard" layer (e.g., radiation-cured acrylic) laid over the "soft pad" as an outer protective overcoat. Also, the "spacer" may be rendered as such a "soft pad".
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patent: 4317123 (1982-02-01), Namiki et al.
patent: 4333998 (1982-06-01), Leszyk
patent: 4340655 (1982-07-01), Hollister et al.
patent: 4353980 (1982-10-01), Helling et al.
patent: 4403231 (1983-09-01), Ando et al.
Boling Norman L.
Mayer Thomas
Rancourt James D.
Brammer Jack P.
Burroughs Corporation
Cass Nathan
McCormack John J.
Peterson Kevin R.
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