Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1981-03-05
1983-05-17
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
350526, G01J 132
Patent
active
043842003
ABSTRACT:
An apparatus for changing illumination optics is provided for use in a microscope including a plurality of illumination optics having different values of magnification. A photometric, light receiving element is disposed in a marginal area of an imaging surface of an objective lens, and an output from the photometric element is determined as the illumination optics are sequentially changed. A matching condition between the objective lens and the illumination optics is detected in accordance with the value determined, and that one of illumination optics is selected which represents the best match.
REFERENCES:
patent: 4163150 (1979-07-01), Stankewitz
patent: 4241251 (1980-12-01), Yonekubo
Nelms David C.
Olympus Optical Company Ltd.
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