Laserbeam recording

Details Laserbeam recording Laserbeam recording

1977-09-22

1979-02-13

Miller, Jr., George H.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 76L, 346135, G01D 1510, G01D 1534

Patent

active

041398530

ABSTRACT:
A method of directly forming a light scattering image, wherein a recording layer is information-wise exposed in the visible light spectral region to a light energy dose of at least 10.sup.-1 Ws cm.sup.-2 with a focussed laser-beam having a beam intensity of at least 10.sup.4 W cm.sup.-2. The recording layer is a thermoplastic polymer layer having dissolved therein at least one substance absorbing visible light, which substance imparts a specular density to the recording layer of at least 0.1 with respect to a monochromatic wave of the laser-beam applied in the exposure and is present in an amount of maximum 10% by weight with respect to the thermoplastic polymer of the layer, the recording layer being capable of directly developing in the areas struck by said beam, minute light-scattering centers providing a minimum increase of white light specular density of 0.2 when measured with respect to a transparent background and determined as described hereinbefore, but being incapable of developing such centers when exposed with the same laser-beam at an intensity reduced by a factor of 10.

REFERENCES:
patent: 3262122 (1966-07-01), Fleisher et al.
patent: 3475760 (1969-10-01), Carlson
patent: 4023185 (1977-05-01), Bloom et al.
patent: 4032691 (1977-06-01), Kido et al.

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