Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1990-07-11
1992-05-19
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250205, 356 731, 340635, H01J 516, G01N 2100
Patent
active
051151260
ABSTRACT:
A means for checking the iluminating means of an endoscope allows both the lamp of the endoscope and the light-guide cable to be checked for their operating conditions. For this purpose, the checking means has a beam splitter positioned in the beam path from the lamp which conveys part of the quantity of light emitted by the lamp to a detecting means. A detecting means provided with a device to receive the distal end of the light-guide cable picks up the quantity of light coming from the cable. From the signal derived therefrom and the signal generated by the detecting means, the transmission factor is found in a calculating circuit by quotient formation and is shown on a display. In this way it is possible to determine whether the transmission factor of the light-guide cable will allow the objects which are going to be viewed to be adequately illuminated or whether the cable needs to be replaced.
REFERENCES:
patent: 4543477 (1985-09-01), Dai et al.
patent: 4580557 (1986-04-01), Hertzmann
patent: 4632544 (1986-12-01), Form
patent: 4633872 (1987-01-01), Chaffee et al.
patent: 4947033 (1990-08-01), Kordts et al.
patent: 4994059 (1991-02-01), Kosa et al.
"The Dyonics Autobrite Illuminator Manual", Dyonics, Inc. (1984).
Ams Felix
Schafer Roland
Messinger Michael
Nelms David C.
Richard Wolf GmbH
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