Patent ID: 8614851
Filing Date: 2013-12-24
Classification: A61B,G01N,G02B

Abstract:
1. A surgical fluorescence stereomicroscope for detecting fluorescing areas of a specimen in an object field, comprising: a first illumination device having an excitation operation state wherein the first illumination device irradiates the object field via at least one illumination beam path with light in the fluorescence excitation wavelength region, and the first illumination device having a surgical operational state wherein the first illumination device irradiates the object field via the at least one illumination beam path with broad-band light in an illumination wavelength region; an observation beam path for guiding reflected and emitted light received from the object field; a first observation filter in the observation beam path, wherein the first observation filter is transparent in an excitation wavelength region and in an emission wavelength region; at least one second observation filter selectably arrangeable in the observation beam path, wherein the at least one second observation filter is at least partly absorbent for light in the excitation wavelength region for controllable attenuation and/or controllable spectral variation of the light visible to an observer in the excitation wavelength region, and wherein the at least one second observation filter is fully transparent for the emitted light; and at least one additional observation filter selectably arrangeable in the observation beam path, the at least one additional observation filter being at least partly absorbent for light in the excitation wavelength region and having an absorption characteristic the same as or different from the at least one second observation filter.