Surgery – Endoscope – Having imaging and illumination means
Patent
1997-12-03
1998-09-08
Mancene, Gene
Surgery
Endoscope
Having imaging and illumination means
600180, 348 68, 348363, 348367, A61B 104
Patent
active
058039007
ABSTRACT:
A light source device for an endoscope provided with a noncircular opening which is capable of stabilizing the rate of change of the quantity of illuminating light with the quantity of movement of the stop blade and thereby preventing the hunting phenomenon of the stop blade in close-up or the like. The device comprises: a gate portion with a noncircular opening for linearly changing the quantity of light from the light source formed therein; a stop blade for controlling the quantity of light passing through the noncircular opening of the gate portion; and a motor for driving the stop blade. The noncircular opening has two V-shaped portions having different opening angles. The stop blade is provided with a circular auxiliary opening for passing part of the light therethrough. Owing to the V-shaped portions and the auxiliary opening, a change of the quantity of output light with the amount of movement of the stop blade is made linear and the hunting phenomenon of the stop blade is prevented even in the region where the quantity of light is regulated to a small quantity.
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Matsumoto Seiji
Nakano Etsuo
Satoh Suwao
Fuji Photo Optical Co., Ltd.
Hatton Ira
Mancene Gene
Snider Ronald R.
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