Image scanning apparatus

Details Image scanning apparatus Image scanning apparatus

1993-04-12

1995-01-31

Hannaher, Constantine

Radiant energy

Source with recording detector

Using a stimulable phosphor

372 24, G03B 4202, H01S 3098

Patent

active

053861248

ABSTRACT:
In an image scanning apparatus, a recording material is scanned with a laser beam having been produced by a semiconductor laser which oscillates in a single longitudinal mode at any given time such that an image having been recorded on the recording material may be read out therefrom or such that an image may be recorded on the recording material. A single picture element read-out period or a single picture element recording period is defined in accordance with a predetermined picture element clock pulse. A radio-frequency current is superimposed upon a drive current for the semiconductor laser. The radio-frequency current has a frequency, which is higher than the reciprocal of the single picture element read-out period or the reciprocal of the single picture element recording period and which falls within a frequency range that does not cause the semiconductor laser to simultaneously oscillate in multiple longitudinal modes.

REFERENCES:
patent: 4258264 (1981-03-01), Kotera et al.
patent: 4480325 (1984-10-01), Aiki et al.
English language abstract for Japanese Unexamined Patent Publication No. 56-11395.

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