| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus which can regulate the brightness of the illumination beam path of a microscope while providing low heat generation without varying color temperature. SOLUTION: In the apparatus for regulating the brightness of a light source (2), configured as an incandescent lamp, in the illumination beam path of the microscope, the brightness of the light source (2) being modifiable by increasing or reducing the electrical power delivered to the light source (2), a red shift, associated with the reduction in the delivered electrical power, of the spectrum of the light emitted by the light source (2) in the illumination beam path is compensated for by way of a variable optical fiber that brings about a blue shift of the spectrum. A color-neutral regulation of the brightness of the illuminating light is thereby achieved.
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