Abstract: A medical therapeutic and/or diagnostic appliance includes an arrangement that senses its position and attitude at any given time, and that includes a first sensing unit on the therapeutic and/or diagnostic appliance and a second sensing unit having a fixed location and attitude and arranged to be separated from the first sensing unit by a signal path. The first sensing unit is constructed, for reasons of sterilization and of position sensing, as an attachment that can be detached from the medical therapeutic and/or diagnostic appliance when in use. A coupling device is provided on the medical therapeutic and/or diagnostic appliance for installation of the attachment over a sterilizing sheath surrounding the therapeutic and/or diagnostic appliance.

Abstract: A medical therapeutic and/or diagnostic appliance includes an arrangement that senses a position and attitude at any given time, and that includes a first sensing unit on the therapeutic and/or diagnostic appliance and a second sensing unit having a fixed location and attitude and arranged to be separated from the first sensing unit by a signal path. The first sensing unit is constructed, for reasons of sterilization and of position sensing, as an attachment that can be detached from the medical therapeutic and/or diagnostic appliance when in use. A coupling device is provided on the medical therapeutic and/or diagnostic appliance for installation of the attachment over a sterilizing sheath surrounding the therapeutic and/or diagnostic appliance.

Abstract: A viewing arrangement includes an objective (5) having a variable intersection distance and an intersection-distance dependent oblique illumination (7) which is separate from the objective (5). The oblique illumination (7) includes two illuminating beam paths (9, 11) for completely illuminating contoured objects without shadows. The illuminating beam paths (9, 11) are inclined toward each other ahead of the object (13, 16) to be viewed. The mutual inclination of the two illuminating beam paths (9, 11) is dependent upon the particular intersection distance of the objective (5).

Abstract: A prism component group is provided in a pivotable binocular tube assembly for a stereomicroscope. The prism component group is configured as a deflection prism with two roof prisms cemented thereto. The two roof prisms are offset relative to respective ones of the optical axes of the stereoscopic component beam paths.

Abstract: The invention is directed to a stereomicroscope having a main objective of variable focal intercept. An optical element is provided in each of the two stereoscopic component beam paths to provide a parallel displacement of the particular beam path. A coupling between each displacement of the two stereoscopic beam paths and the actual adjustment of the focal intercept of the main objective is also provided in such a manner that a preselectable constant stereo angle results even when there is a variation of the focal intercept of the main objective. In this way, a physiologically constant viewing impression results for the viewer.

Abstract: In an instrument for the examination and surgery of the eye, an ophthalmological objective is combined with an operation microscope whose main objective is combined with an optical system of variable back focus and focal length. Every plane of the eye lying between the cornea and the fundus is imaged by the instrument at an intermediate image plane. In this way, with a single instrument, the operator can carry out work on the cornea, the eye lens, the vitreous body, and the retina. Since the instrument provides the observer with a reflection-free image, contact of the eye to be operated upon with an optical auxiliary means which eliminates the refractive power is unnecessary.

Abstract: The invention is directed to a double microscope for a surgeon and an assistant. The double microscope includes an optical splitter plate which splits the light coming from the operation field and directs the split beams to the two microscopes. The optical splitter plate, together with the objective of the assistant microscope and a beam deflection element, are all accommodated in a component connecting the two microscopes.

Abstract: The invention contemplates a support stand having a weight-compensating four-bar linkage in the form of an elongate parallelogram, for adjustable-elevation support of an observation instrument such as an operation microscope. Weight compensation is achieved by a preloaded spring contained within opposed channels which constitute two elongate members of the linkage and which have nesting side walls to complete the enclosure of the spring, while also accommodating such electrical and optical cable connections as may be needed to communicate between the instrument and the base of the stand.

Abstract: For the mounting of a lamp which is firmly connected with a reflector, at least two coil springs are so arranged parallel to an attachment part that they contact the reflector on its outer side close to the outer periphery. The reflector is so developed at these points of contact that components of force perpendicular to the attachment surface are produced by the springs.