Illuminance controller for light source and endoscope including

Details Illuminance controller for light source and endoscope including Illuminance controller for light source and endoscope including

1988-07-13

1989-05-30

Grieb, William H.

Surgery

Truss

Perineal

362282, 358 98, A61B 106

Patent

active

048340715

ABSTRACT:
An illuminance controller of a light source for use in an endoscope or the like, including a diphragm for cutting a light beam generated by the light source to control an illuminance of the light beam, in which the light beam cut amount of the diaphragm is controlled by a diaphragm controller, and in which the illuminance of the light beam cut by the diaphragm varies with respect to a driving amount of a drive motor in accordance with an exponential function.

REFERENCES:
patent: 4407272 (1983-10-01), Yamaguchi
patent: 4425599 (1984-01-01), Rieder et al.
patent: 4444462 (1984-04-01), Ono et al.
patent: 4625236 (1986-11-01), Fujimori et al.
patent: 4710807 (1987-12-01), Chikama
patent: 4729018 (1988-03-01), Watanabe et al.

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