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Process and apparatus for automatically realizing Kohler's principle of illumination

  • US 4,163,150 A
  • Filed: 09/28/1977
  • Issued: 07/31/1979
  • Est. Priority Date: 10/01/1976
  • Status: Expired due to Term
First Claim
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1. A process for automatically adjusting the illumination system of a microscope having a variable magnification system which comprises the steps of:

  • (a) measuring the extent of illumination of the viewable portion of the viewing plane or planes conjugated thereto with a sensing means which emits a measurement signal;

    (b) converting said measurement signal into a control signal; and

    (c) feeding said control signal to adjustment means for automatically adjusting said degree of illumination in accordance with Kohler'"'"'s Principle in response to the magnification chosen, by varying at least one of (i) a diaphragm or (ii) the focal length.

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