Automatic focus control for a microscope

Details Automatic focus control for a microscope Automatic focus control for a microscope

1978-04-06

1980-01-29

Martin, John C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

358227, 358 93, G02B 2100, H04N 526, H04N 718

Patent

active

041863011

ABSTRACT:
A process and apparatus for the automatic correction of the focusing of a microscope in an image plane utilizes two microscope outputs forming two images of the same object in two different planes surrounding the image plane and two matrices with at least one line of N photodetectors receiving the two images. A contrast measuring circuit of each image is associated with each matrix and a comparator of the signals is used for the two contrast measuring circuits. Connected to the output of the comparator is a circuit for the formation of a correction signal and the microscope is focused by the correction signal.

REFERENCES:
patent: 3883689 (1975-05-01), Mansour et al.
patent: 3967056 (1976-06-01), Yata et al.

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