Photographing light quantity controller for endoscope

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

1996-12-11

2000-02-22

Blankenship, Howard B.

Photography

Body examination photography

Endoscope

396159, 362 4, G03B 2900

Patent

active

RE0365823

ABSTRACT:
A photographing light quantity controller for an endoscope, which 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 device for supplying light for illuminating an object to the endoscope, a device for detecting a quantity of light that is reflected from the object and for outputting a signal in accordance with the detected quantity of light, and a device for amplifying the signal, with the amplifying device having a plurality of amplification factors which can be selected as desired. A photographing light quantity control device is provided for controlling the quantity of illuminating light that is supplied to the endoscope when a photographing operation is conducted, on the basis of the output signal from the amplifying device. A device is also provided for automatically switching over the amplification factors of the amplifying device from one to another in accordance with the brightness of the object.

REFERENCES:
patent: 3599630 (1971-08-01), Sato et al.
patent: 4249809 (1981-02-01), Kanemaru et al.
patent: 4524761 (1985-06-01), Hattori et al.
patent: 5115261 (1992-05-01), Noda et al.
patent: 5159380 (1992-10-01), Furuya et al.
patent: 5184159 (1993-02-01), Furuya et al.
patent: 5184170 (1993-02-01), Takahashi et al.
English Abstract of Japanese Patent 61-13236.
English Abstract of Japanese Patent 2-84609.

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