Registers – Records – Laminated
Patent
1978-09-29
1980-10-28
Kilgore, Robert M.
Registers
Records
Laminated
346 76L, G06K 1902, G06K 700, G01D 1510
Patent
active
042309395
ABSTRACT:
The invention provides an information-recording element in which information can be written and read optically. The element is constructed from a transparent substrate, a laser light-absorbing, dye-containing auxiliary layer provided thereon, as well as a laser light-reflecting recording layer present on the auxiliary layer. Upon recording information the element is exposed to pulsated laser light via the substrate, holes being formed in the recording layer. The auxiliary layer stimulates the formation of holes, a saving of laser light energy being obtained. In a favorable embodiment the auxiliary layer has a laser light absorption of from 20 to 80% and a maximum thickness of 2500 A. In a further favorable embodiment the auxiliary layer also comprises an endothermal material, for example, nitrocellulose having a nitrogen content of at least 11%.
REFERENCES:
patent: 3560994 (1971-02-01), Wolfe
patent: 3665483 (1972-05-01), Becker
patent: 3787873 (1974-01-01), Sato
patent: 3889272 (1975-06-01), Lou
patent: 4000492 (1976-12-01), Willens
patent: 4101907 (1978-07-01), Bell
de Bont Marinus R. J.
Kivits Petrus J.
Schoot Cornelis J.
Zalm Pieter
Briody Thomas A.
Kilgore Robert M.
Streeter William J.
Tamoshunas Algy
U.S. Philips Corporation
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