Surgery – Endoscope – Having imaging and illumination means
Patent
1999-02-24
2000-10-03
Leubecker, John P.
Surgery
Endoscope
Having imaging and illumination means
600178, A61B 1045
Patent
active
061265934
ABSTRACT:
A device for controlling an amount of light of a lighting unit for use in an endoscope, used to view an image of an object. The device includes a light shield for shielding light generated by a light source and transmitted to the endoscope. A stepping motor drives the light shield for a series of predetermined time intervals. Brightness of the image is detected during each of the time intervals and pulses are generated during each of the time intervals motor hunting is detected. The number of pulses generated is determined in response to detection of hunting and when hunting is detected the number of pulses is reduced. The pulses generated are used to drive the stepping motor in each of the plurality of time intervals.
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Honda Ryoji
Takada Makoto
Takahashi Tadashi
Asahi Kogaku Kogyo Kabushiki Kaisha
Leubecker John P.
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