Device of switching a scanning beam diameter

Details Device of switching a scanning beam diameter Device of switching a scanning beam diameter

1984-11-28

1987-02-10

Goldberg, E. A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

346108, H04N 121, G01D 942

Patent

active

046427015

ABSTRACT:
A device for switching a scanning beam diameter, incorporated into a picture image scanning and recording device, which switches the diameter of the scanning beam in response to the density of number of scanning lines. The beam from a scanning light generator is branched at least into two optical paths and the diameter of at least one of the branched beams is magnified by a beam expander. The branched optical paths are unified again into a single path and, in order to pass the beam through one desired optical path a shutter device is provided.

REFERENCES:
patent: 3657473 (1972-04-01), Corcoran
patent: 4060323 (1977-11-01), Hirayama
patent: 4539478 (1985-09-01), Sano

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