Apparatus for stabilizing beam for exposure

Details Apparatus for stabilizing beam for exposure Apparatus for stabilizing beam for exposure

1976-06-23

1978-01-10

Edlow, Martin H.

Oscillators

Molecular or particle resonant type

H01S 300

Patent

active

040681971

ABSTRACT:
An apparatus for stabilizing a laser beam to be used for exposure in an image-reproducing apparatus wherein said beam is suitably controlled by image signals obtained from the scanning of the original beam as modulated. A laser beam, after being suitably modulated by an ultrasonic light modulator, is branched out by a half mirror into two beams, one of which is to be used for exposing a photosensitive material and the other is used as a negative feedback signal. This feedback signal is then added to an image signal so that a linearity between exposing beam and image signals are greatly improved. Further, by improving the linearity of exposing beam, the stability of the exposing beam is simultaneously improved.

REFERENCES:
patent: 3500236 (1970-03-01), Clark
patent: 3517330 (1970-06-01), Doyle et al.
patent: 3588738 (1971-06-01), Goodwin
patent: 3780296 (1973-12-01), Waksberg
patent: 3831108 (1974-08-01), LeFloch
patent: 4008444 (1977-02-01), Far et al.

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