Method for correcting image density in thermo-optic recording

Details Method for correcting image density in thermo-optic recording Method for correcting image density in thermo-optic recording

1993-10-01

1995-01-03

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Including control feature responsive to a test or measurement

430332, 430945, G03C 502

Patent

active

053785630

ABSTRACT:
A laser beam is modulated with an image signal, a thermosensitive recording material, which is composed of a substrate and a color forming agent, a developing agent, and a light absorbing dye, which are overlaid on the substrate, is scanned with the modulated laser beam, and an image represented by the image signal is thereby recorded on the thermosensitive recording material. Before the image is recorded on the thermosensitive recording material, a density pattern constituted of a plurality of sections whose densities vary stepwise is recorded on a portion of the thermosensitive recording material with the laser beam. Densities of the respective sections of the density pattern recorded on the thermosensitive recording material are measured. From the results of measurements, a conversion table is created for use in conversion processing on the image signal such that the image may be recorded with an appropriate image density range on the thermosensitive recording material. The image signal is converted in accordance with the conversion table when the image is recorded on the thermosensitive recording material, on which the density pattern has been recorded.

REFERENCES:
patent: 4211558 (1980-07-01), Oguchi et al.
patent: 4894685 (1990-01-01), Shoji
patent: 5234797 (1993-08-01), Satake et al.
patent: 5283141 (1994-02-01), Yoon et al.

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