摘要 |
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. |
申请人 |
ASAHI KOGAKU KOGYO K.K., TOKIO/TOKYO, JP |
发明人 |
FURUYA, KATSUHIKO, TOKIO/TOKYO, JP;NAKASIMA, MASAAKI, TOKIO/TOKYO, JP;ENOMOTO, TAKAYUKI, TOKIO/TOKYO, JP;TAKAHASHI, TADASHI, TOKIO/TOKYO, JP |