Process and apparatus for automatically realizing Kohler's principle of illumination
First Claim
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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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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Citations
22 Claims
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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:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A variable magnification microscope comprising:
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(a) an illumination means for illuminating an object to be viewed; (b) a sensing means for sensing the image brightness of said illumination provided by said illumination means and for emitting a signal corresponding to said brightness of illumination; (c) a converter means for converting said signals received from said sensing means so as to generate control signals for automatically adjusting the illumination in response to the magnification of the microscope in accordance with Kohler'"'"'s Principle, by varying at least one of (i) a diaphragm or (ii) the focal length. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification