Laser recording apparatus

Details Laser recording apparatus Laser recording apparatus

1985-11-20

1987-07-07

Goldberg, E. A.

Recorders

Thermal recording

346108, 346160, 358298, G01D 1514, H04N 121

Patent

active

046790578

ABSTRACT:
Disclosed is a tone reproducible laser recording apparatus in which a laser beam is produced by a pulse signal modulated in amplitude and also in pulse width in accordance with a multi-tone image signal and/or another factor. This apparatus, when a semiconductor laser is used as a laser light source, further includes an optical element disposed in an optical path of the beam. The optical element cuts off light in a range under a threshold wavelength to enlarge a linearity between exciting current and light outputs.

REFERENCES:
patent: 4307408 (1981-12-01), Kiyohara et al.
patent: 4473829 (1984-09-01), Immink et al.

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