Light source apparatus

Details Light source apparatus Light source apparatus

1980-08-27

1982-04-20

Adams, Russell E.

Surgery

Truss

Pad

354 51, 354 62, 354126, 128 6, 128 8, G03B 716, G03B 2900

Patent

active

043256180

ABSTRACT:
A light source apparatus for a fiberscope comprises a xenon lamp for producing light of a required dose for illuminating a scene to be photographed through a light guide during the presence of a synchronizing signal, an integrating circuit for integrating light reflected from the scene according to the synchronizing signal, a comparator for producing a coincidence signal when the output signal of the integrating circuit coincides with a predetermined signal, a rotary solenoid energized according to the coincidence signal from the comparator, and a shutter plate mounted on a shaft of the rotary solenoid and serving to prevent light from the xenon lamp from entering the light guide when the solenoid is energized. Further, the light source means comprises a feedback circuit for supplying the output signal of the comparator through a positive feedback path to the integrating circuit to saturate the output signal thereof.

REFERENCES:
patent: 4057809 (1977-11-01), Nakamoto et al.
patent: 4086583 (1978-04-01), Takahashi
patent: 4153356 (1979-05-01), Hama

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