Patent ID: 7649685

Claim:
A stereomicroscope comprising: a first illumination source emitting white light; a second illumination source emitting light having a spectral band including an excitation spectral region, wherein the first illumination source and the second illumination source can be used separately and can be used simultaneously; at least one filter operating when the first and second illumination sources are used simultaneously to regulate light from at least the first illumination source such that light from the first and second illumination sources has a spectral band that is the same as the excitation spectral region; at least one deflection element arranged to direct light from the first and second illumination sources onto a specimen to be viewed; an observation beam path along which the specimen is viewed; and an observation filter insertable into the observation beam path for detection of fluorescent light emitted by the specimen and removable from the observation beam path for observation of light reflected by the specimen.