Photographing light quantity controller for endoscope

Details Photographing light quantity controller for endoscope Photographing light quantity controller for endoscope

1990-10-12

1993-02-02

Gellner, Michael L.

354 62, G03B 700

Patent

active

051841703

ABSTRACT:
A photographing light quantity controller for an endoscope is used to control the quantity of illuminating light when a photograph is to be taken through the endoscope. The photographing light quantity controller comprises a light source for supplying light for illuminating an object to the endoscope, and a device for detecting an illuminating condition in an observation state before a photographing operation is initiated. A device is also provided for controlling the brightness of illuminating light that is supplied from the light source to the endoscope during the photographing operation on the basis of a signal that is detected by the device for detecting an illuminating condition in the observation state.

REFERENCES:
patent: 4021663 (1977-05-01), Takahashi
patent: 4322129 (1982-03-01), Takahashi et al.
patent: 4366529 (1982-12-01), Takahashi et al.
patent: 4561429 (1985-12-01), Sato et al.
patent: 4872029 (1989-10-01), Kato
patent: 4945336 (1990-07-01), Hisamichi et al.

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