| 摘要 |
The observation instrument for a stereoscopic operation microscope, with input connections (1) for the two beam paths (2, 7, 19) of the operation microscope, with instruments (8) for connecting observation tubes for the main observer, with display-screen units (11) and projection instruments (13) for projecting the images from the display-screen units (11) into the observation beam paths (2, 7, 19), with instruments for connecting video cameras and with instruments (10) for connecting tubes for a co-observer, is distinguished in that the following are arranged in each of the two beam paths behind the input connections (1), as viewed in the direction of the beam paths (2, 7, 19): a first beam splitter (3) for deviating a part of the light of the observation beam path into a video camera, behind this a switchable shutter (4) for attenuating and/or blocking the light of the observation beam path, and behind this an optical element (21, 23) with a second beam splitter (22), which splits the light of the observation beam path and the light from the projection instrument (13) into two beams for the observation tube and for the co-observer tube of this beam path.
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