Patent ID: 7839566

Claim:
A surgical microscopy system, comprising: an illumination system for illuminating an object region with illumination light along an illumination beam path, and an optical imaging system for generating an image of the object region; wherein the illumination system comprises: a xenon gas discharge lamp for generating at least the illumination light; and a spectral filter which is optionally positionable in the illumination beam path and removable from the same, wherein the spectral filter has a filter characteristics which, for a wavelength range between 400 nm and 700 nm, satisfies the relations: f *( m*λ+b−Δb )≦ A (λ)≦ f *( m*λ+b+Δb ); 0.0025/nm≦m≦0.0035/nm; b=−1.053; f≦1; and Δb≦0.3; wherein it is set A(λ)=0, if Δ(λ) is smaller than zero according to the above relations, wherein it is set A(λ)=f, if A(λ)≧f according to the above relations, and wherein λ represents a wavelength of the illumination light, and A(λ) represents a ratio between an intensity of light emanating along the illumination beam path from the spectral filter and an intensity of light coming from the xenon gas discharge lamp being incident onto the spectral filter.