Apparatus and method for enhancing printing efficiency to reduce

Details Apparatus and method for enhancing printing efficiency to reduce Apparatus and method for enhancing printing efficiency to reduce

1996-02-12

1997-07-29

Fuller, Benjamin R.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347260, B41J 247, G01D 1534, G02B 2600, G02B 2700

Patent

active

056526121

ABSTRACT:
Apparatus and methods for exposing multilayered thermal imaging by proper optimization of the exposing radiation angle of incidence of a coherent radiation source to eliminate "cloud" or "woodgrain" artifacts stemming from local differences in printing efficiency across a sheet of the multilayered imaging media. A media is mounted to an exposure surface and exposed with a scanning coherent Gaussian laser beam at an angle other than normal incidence. The angle of incidence of the exposing beam is intentionally made large enough so that all rays with high reflectance loss are paired with equally many with low reflectance loss to increase printing efficiency. This efficiency occurs over a range of angles between 21 and 25 degrees, with some benefit beginning at 16 degrees.

REFERENCES:
patent: 5210548 (1993-05-01), Grabowski
patent: 5235183 (1993-08-01), Whiting et al.
IBM Technical Disclosure Bulletin, vol. 25, No. 5, Oct. 1982, New York, p. 2460, W.I. Imaino "Double frequence scanner/printer".

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