Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Patent
1994-01-26
1996-07-02
Fuller, Benjamin R.
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
347237, 347240, 347243, 347247, 347251, B41J 247, B41J 2435, H01S 300, G01D 1514
Patent
active
055327273
ABSTRACT:
A laser beam of a constant intensity is generated by a semiconductor laser and applied to a thermosensitive recording medium. The density of a colored recorded area of the thermosensitive recording medium is detected by a densitometer, and shading correcting data for making the density of the colored recorded area constant based on the detected density are stored in a shading data memory. A controller reads the stored shading correcting data and controls the intensity of the laser beam generated by the semiconductor laser based on the shading correcting data for thereby compensating for variations in the level of an image signal due, for example, to intensity irregularities of the laser beam applied to the thermosensitive recording medium and irregularities of the speed at which the thermosensitive recording medium is scanned with the laser beam.
REFERENCES:
patent: 4415913 (1983-11-01), Diddens
patent: 5041866 (1991-08-01), Imoto
patent: 5289210 (1994-02-01), Takayanagi
patent: 5369423 (1994-11-01), Hunter et al.
Agano Toshitaka
Shoji Takashi
Fuji Photo Film Co. , Ltd.
Fuller Benjamin R.
Gordon Raquel Yvette
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