Patent ID: 8159743

Claim:
A surgical microscope defining first and second stereoscopic component beam paths and comprising: a microscope main objective for visualizing an object plane in an object region; said microscope main objective being mounted so as to cause said first and second stereoscopic component beam paths to pass there through; said microscope main objective having a side facing away from said object region; an adjustable illuminating arrangement for supplying an illuminating light; said adjustable illuminating arrangement including an illuminating optic having a beam deflecting unit mounted on said side of said microscope main objective to direct said illuminating light through said microscope main objective to said object region; said adjustable illuminating arrangement being movable into a first position wherein said illuminating light passes through the cross-sectional surface of said microscope main objective in an area section at least partially surrounding the optical axis of said first stereoscopic component beam path and/or the optical axis of said second stereoscopic component beam path; said first and second stereoscopic component beam paths conjointly defining a stereo basis; and, said adjustable illuminating arrangement being movable from said first position into a further position wherein said illuminating light passes through said cross-sectional surface in an area section having a centroid disposed at a distance from the optical axis of at least one of said stereoscopic component beam paths which is greater than said stereo basis of said first and second stereoscopic component beam paths.