Patent ID: 7710641

Claim:
A tube for a microscope, comprising: an adaptation interface configured to convey a light beam from the microscope along an optical axis; a rotatably disposed operator interface; a rotatably disposed beam deflecting unit disposed on a side of the optical axis opposite the operator interface, a rotation of the operator interface being constrainedly coupled to a rotation of the beam deflecting unit; and a beam deflecting device including a beam-splitting device, the beam splitting device including a Bauernfeind prism, the Bauernfeind prism being configured to reflect therein at least a portion of the light beam twice so as to deflect the at least a portion of the light beam to the beam deflecting unit, the Bauernfeind prism being disposed at a first distance perpendicular from an extension of the optical axis; wherein the optical axis is defined by a path of the light beam between the microscope and the beam deflection device; and wherein an axis of rotation of the beam deflecting unit is disposed at a second distance perpendicular from the extension of the optical axis, the second distance being greater than the first distance.