Laser recording method

Details Laser recording method Laser recording method

1998-05-04

2000-09-19

Mathews, Alan A.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347251, 347256, 347262, 355 18, G03B 2732, H04N 100

Patent

active

061219967

ABSTRACT:
A square laser recording spot, having an energy profile with a very sharp transition between the writing and non-writing area in both dimensions, is created by a shaping the laser energy into a line narrower than the desired spot size and scanning this line to create a square spot. The sharp transition resists changes in the writing process which could vary the size of the mark created by the spot. The square shape of the mark avoids dot gain and eliminates the need for dot gain calibration.

REFERENCES:
patent: 4025189 (1977-05-01), Pugsley
patent: 4468442 (1984-08-01), Sakamoto
patent: 4623972 (1986-11-01), Darby et al.
patent: 5309178 (1994-05-01), Gross
patent: 5818645 (1998-10-01), Whaley et al.
patent: 5861992 (1999-01-01), Gelbart
patent: 5923358 (1999-07-01), Yamakawa

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