Optical recording-reproducing method and device by using the sam

Radiation imagery chemistry: process – composition – or product th – Retrieving image made using radiation imagery

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430944, 430945, 430495, 430494, 430273, 430286, 430327, 430926, 3461351, 346 76L, 369284, 369285, G03C 500, G03C 1100

Patent

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049101072

ABSTRACT:
An optical recording-reproducing method comprising the step of irradiating a radiation for polymerization on an optical recording medium having a recording layer containing at least one selected from the group consisting of azulenium salt compounds, pyrylium dyes, diene compounds, croconic methine dyes and polymethine compounds (hereinafter called the group B) and a diacetylene derivative compound; the step of irradiating a radiation corresponding to a recording information to thereby change the color at the irradiated portion of the recording layer; and the step of reading the recorded information by irradiating a reading light with a shorter wavelength than said radiation on said recording layer. Also, an optical recording-reproducing device utilizes the above-mentioned method.

REFERENCES:
patent: 3723121 (1973-03-01), Hauser
patent: 3772028 (1973-11-01), Fico et al.
patent: 4215208 (1980-07-01), Yee et al.
patent: 4439514 (1984-03-01), Garito
patent: 4536450 (1985-08-01), Garito
patent: 4562141 (1985-12-01), Tieke
patent: 4678736 (1987-07-01), Hanamura et al.
"Irradiate" in The American Heritage Dictionary, second College Edition, Houghton Mifflin Company, Boston, MA 02108, 1982, p. 678.

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