Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element
Patent
1981-03-25
1983-07-19
Hartary, Joseph W.
Recorders
Performance of multiple functions of steam and gas engines
Pressure responsive element
346 76L, 3461351, 369 94, 430945, G01D 1534
Patent
active
043946615
ABSTRACT:
Recording material suitable for use in laser beam recording characterized in that said material comprises on the same side of a laser radiation-reflective support, including a support with laser radiation reflecting layer, two superimposed adjacent recording layers which can undergo on exposure instantly produced optical density changes responsive to irradiation with laser beams of different wavelength, the compositions of said layers being such that they have different radiation-sensitive characteristics permitting information-wise recording to take place in one layer without changing the optical density of the other layer to such a degree that laser beam read out of optical density information in one layer becomes impossible upon using laser beams of different wavelength for each recording layer.
REFERENCES:
patent: 3181170 (1965-04-01), Arin
patent: 3716844 (1973-02-01), Brodsky
patent: 3842195 (1974-10-01), Takahashi
patent: 3902010 (1975-08-01), Goshima
patent: 4109045 (1978-08-01), Goshima
patent: 4145758 (1979-03-01), Drexler
patent: 4214249 (1980-07-01), Kasai
Agfa-Gevaert N.V.
Breiner A. W.
Hartary Joseph W.
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