Light source device for endoscope which controls the voltage acr

Details Light source device for endoscope which controls the voltage acr Light source device for endoscope which controls the voltage acr

1977-07-20

1980-08-26

Michell, Robert W.

Surgery

Truss

Perineal

354 62, A61B 104, G03B 2900

Patent

active

042190142

ABSTRACT:
A light source provided in an endoscope is controlled to provide a constant comparatively low luminance when the object is to be observed, and to provide a first lowered and then gradually increased luminance when the object is to be photographed. The voltage and consequently, the luminance is first further lowered below the comparatively low luminance for observation when the object is to be photographed and the voltage is then increased so that a high luminance results. A control circuit is connected between a shutter release signal generating circuit and a light source to control the voltage across the light source upon receipt of the shutter release signal.

REFERENCES:
patent: 3329074 (1967-07-01), Gosselin
patent: 4086583 (1978-04-01), Takahashi

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