Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1975-03-31
1976-10-05
La Roche, Eugene
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
73388BN, 250201, 350 46, 350255, 355 56, G02B 711
Patent
active
039846784
ABSTRACT:
An apparatus for automatically adjusting a microscope in focus, said microscope comprising a stage on which a specimen is to be placed, an objective, an objective tube and a driving member for relatively moving said stage and objective tube. Said apparatus comprises a nozzle member mechanically coupled to said objective tube and being opposed to the specimen, said nozzle being connected to an air pump so as to blow or suck an air stream from said nozzle member, a pressure detector for detecting pressure variations of said air stream to produce an electric signal which varies as a function of a distance between said objective and specimen and an electric motor energized with a signal related to said electric signal and mechanically coupled to said driving member of the microscope.
REFERENCES:
patent: 3326081 (1967-06-01), White
patent: 3519334 (1970-07-01), Heitmann et al.
patent: 3704657 (1972-12-01), Sliwkowski et al.
Awamura Daikichi
Uchiyama Yasushi
La Roche Eugene
Nippon Jido Seigyo Ltd.
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