Process and apparatus for automatically realizing Kohler's princ

Details Process and apparatus for automatically realizing Kohler's princ Process and apparatus for automatically realizing Kohler's princ

1977-09-28

1979-07-31

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250201, 350 17, G01J 132

Patent

active

041631501

ABSTRACT:
A process and apparatus is disclosed for automatically realizing Kohler's Principle of Illumination in microscopes and the like in which the illumination means of the microscope is adjusted to fully take Kohler's Principle of Illumination into account. Optimization is achieved by sensing the extent of illumination, preferably with photoelectric type sensors, which generate signals proportional to the brightness of illumination. The signals are converted into control signals in a converter stage which in turn control motor means which serve to adjust the openings of at least one diaphragm and/or the focal length of an illumination pancratics in the system. The sensing means are adjustably positioned so that it may be moved depending on the objective and magnification used.

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