Laser recording apparatus

Details Laser recording apparatus Laser recording apparatus

1987-04-14

1989-01-17

Goldberg, E. A.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

358296, 372 29, 372 31, G01D 942, H04N 121, H01S 313

Patent

active

047990694

ABSTRACT:
A laser recording apparatus for printing multi-tone image data by driving a laser diode according to levels of an analog signal containing the image data thereby to modulate a laser beam output by the laser diode, and causing the modulated laser beam to scan a recording medium in transverse directions. The output of the laser diode is stopped or reduced in level for a certain time in each of periods at predetermined intervals, each period corresponding to each pixel in the printed image. This eliminates mode hopping noise and optical feedback induced intensity noise, and hardly gives rise to the problem of electromagnetic wave disturbance. By elongating or shortening the time for stopping or reducing the emission by the laser diode (which time is shorter than the period corresponding to one pixel), the image density may be adjusted without impairing the above advantage.

REFERENCES:
patent: 4480325 (1984-10-01), Aiki et al.
patent: 4611352 (1986-09-01), Fujito
patent: 4638483 (1987-01-01), Bowers
patent: 4665524 (1987-05-01), Cotler
patent: 4672192 (1987-06-01), Muka
patent: 4679057 (1987-07-01), Hamada

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