Kohler illumination


Also found in: Medical.

Kohler illumination

[′kō·lər i‚lü·mə′nā·shən]
(optics)
A method of illumination for the optical microscope used with coiled filaments or other sources of irregular form or brightness; an image of the filament large enough to fill the iris opening is focused on the condenser which is focused so that the image of the iris diaphragm on the lamp is in focus with the specimen, and the lamp iris is opened only enough to fill the field of view; the iris of the microscope is opened only enough to illuminate the back aperture of the objective; no ground glass is used.
References in periodicals archive ?
the Msp Must Be A Complete And Integrated Unit, Allowing For Proper Kohler Illumination Of All Light Sources.
In 1893, Kohler developed the microscope illumination technique that both bears his name and remains in use: Kohler illumination.
This book covers all topics relating to the field of cytology from Kohler illumination to how to screen to any questions one may have regarding stains, slides and coverslipping and cleaning the scope.
The German-engineered optics--brightness synchronized to provide clear, sharp images without the need to adjust light intensity--includes pre-fixed Kohler illumination, so that there is no need to worry about correctly centering the condenser.