Optical observation unit and method for ensuring an unchanging illumination intensity when changing the color temperature of the illumination

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United States of America Patent

PATENT NO 9829692
SERIAL NO

12760184

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Abstract

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An optical observation unit (1) has an illumination apparatus (43) for illuminating an observation object (3). The illumination apparatus (43, 143) has a light source (45) emitting illumination light with a first color temperature, and a spectral filter (49) that can be inserted in the illumination beam path. The spectral filter (49) converts the illumination light with the first color temperature into illumination light with a second color temperature. The illumination apparatus further has an attenuator (51) that can be inserted in the illumination beam path in place of the spectral filter (49) and has a transmission characteristic that leads to an intensity reduction of the illumination light with the first color temperature that corresponds to the intensity reduction of the illumination light with the second color temperature by way of the spectral filter (49).

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Patent Owner(s)

  • CARL ZEISS MEDITEC AG

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ernsperger, Stefan Ellwangen, DE 9 84
Kratzer, Thomas Konigsbronn, DE 1 6
Reimer, Peter Ellwangen, DE 86 1267
Stich, Bruno Aalen, DE 3 40

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