Abstract: A microscope, which may be a stereomicroscope, includes: at least one objective; at least one eyepiece; at least one optical component configured to form a beam path from the objective to the eyepiece, where each optical component includes a lens, mirror, or deflection prism; and a tube configured to enclose a portion of the beam path, including at least one region of modifiable length configured to connect to at least one optical correction element and configured so that the optical correction element may be inserted into or removed from the portion of the beam path. The microscope may include a linkage between the tube and the correction lens configured to pivot or slide the correction lens as a function of a length of the region of modifiable length.

Abstract: The invention relates to a stand having a parallelogram carrier (=b 2b) and a balancing device, in which, between a support arm (60) that runs substantially horizontally and a basic part (62) that can be braked with respect to a basic body (12), there is arranged at least one measuring unit (64) to measure and absorb the imbalance forces and moments which arise.

Abstract: The invention describes a sleeve (1) for movably retained eyepiece tubes (2) for optical devices which rests with its eyepiece-side part (5) against the outer wall of the eyepiece tube (2), and with its housing-side part (6) fits around the inner wall of an opening (7) in the tube housing (3) provided for the eyepiece tube (2). The sleeve (1) is characterized an immovable fit on both device assemblies (2 and 3), and is securely protected against even unintentional removal. The result is to achieve a hermetic seal, impermeable to air and moisture, of the relevant parts of the optical device.

Abstract: A stand having a carrier (2) and a load-equalizing unit (18), in the case of which stand there is provided, between the load-equalizing unit (18) and the support arm (2), a counterbalancing transmission (106) at which, independently of the position of the load, it is possible by means of changing the position of a connecting arm (5) for a constant force (FA) output by the load-equalizing unit (18) to be changed in position for balancing purposes when there are changes in weight at the load (G).

Abstract: A device for controlling a characteristic of an image signal superimposed on a specimen image includes: a main optical system configured to refract light emitted from a specimen into a main beam path; a superimposition apparatus in a fixed relationship to the main optical system, configured to generate the image signal; a superimposing reflector configured to reflect the image signal generated by the superimposition apparatus into the main beam path and to superimpose the image signal onto the specimen image; an image measurement unit in a fixed relationship to the main optical system configured to measure a characteristic of the specimen image; and a controller configured to adjust a characteristic of the image signal generated by the superimposition apparatus in response to a measurement by the image measurement unit. The characteristic of the specimen image and the characteristic of the image signal may be brightness, color, or contrast.

Abstract: The invention concerns an optical viewing device which incorporates a spectral filter to partially reduce the intensity or wavelength(s) of light transmitted to a specific region of a specimen which may be a human eye. The reduction in light intensity or wavelength may be variable across the filter and may be accomplished in an intensity-dependent or a wavelength-dependent manner.

Abstract: The invention concerns a method and an apparatus for automatically focusing an optical device onto a specific and predetermined region of a specimen. The apparatus compares signals corresponding to the vertical distance between a principal objective and a region of a specimen which is in focus to the vertical distance between the principal objective and a target region on the specimen. If the comparison of the distances indicates that they are not the same, the system automatically alters the distance between the specimen and the principal objective so that the target region is properly focused.

Abstract: A stand having an automatically correctable balancing system and balancing mechanisms electrically controlled by a computer (10). Replaceable accessories can be joined to a component (9) movably joined to the stand (6). Associated with the computer (10) are a calculation program and an information system that, by means of a reading device, reads correction information from data media of the accessories and conveys it to the computer.

Abstract: The invention concerns a microscope having a basic body on or in which are arranged at least one microscope objective, at least one eyepiece, and at least one beam splitter that is provided in the beam path between the microscope objective and the eyepiece and that reflects a portion of the light out of the beam path to the eyepiece or reflects images into the beam path going to the eyepiece.

Abstract: The invention relates to a stereomicroscope (1) with a main body (3) and wit an interface device (2) which is connected to the main body (3) and/or to an accessory (4), either permanently or in a manner that does not permit easy removal, and the interface device (2) permits the rotation of the accessory (4) relative to the main body (3) in the manner of a pivot bearing (5).

Abstract: An optical viewing device in which image data are reflected in, for example a surgical (stereo)microscope, such that the brightness or color (temperature) of the overlaid information can be adapted to the needs of the viewer by means of a controllable reflected-in image illumination system (18). The additional light source can be used, simultaneously with and/or alternatively to the main light source (11), as illumination for a transmitted-light display (21). Alternatively, the light (2, 6) reflected from the specimen (13) can also be used as a light source for the display (21). This makes possible automatic regulation of the brightness of the reflected-in image for each portion of the overlaid image. Instead of a transmitted-light display (21), an incident-light display, for example a D-ILA, can also be used for the reflected-in image.

Abstract: Stand arrangement, in particular for medical examining and surgical microscopes, having a support foot (1), an upper part (2a), which can be rotated with respect to the support foot (2) about a vertical axis (A), and a boom (3), mounted pivotably thereon, for holding the microscope (9). The lamp housing (11) is arranged on a carrier (10) connected to the boom (3) and thereby serves to balance the stand.

Abstract: An optical instrument, such as a microscope or a camera, is provided for forming a viewable image of an object. The optical instrument comprises an objective lens for forming the viewable image at an image plane, an eye sensor for sensing the direction of gaze of a user viewing the viewable image and means for controlling a controllable function of the optical instrument in dependence upon the sensed direction of gaze. The eye sensor comprises a sensor lens for focusing light reflected from the retina of the user, an imaging transducer located at a plane which is conjugate to the image plane with respect to the sensor lens, for generating an electrical image sign of a portion of the user's retina, a memory for storing retinal image information of the user and circuitry for comparing the retinal image signal generated by the imaging transducer with the stored retinal image information to generate gaze information indicative of the direction of gaze of the user.

Abstract: The invention concerns an illumination device having a stop (8) for a surgical microscope, whose stop (8) is capable of covering a partial light flux of the illumination system, the coverage not being accomplished completely as a result of the particular configuration of the stop.

Abstract: The invention refers to a novel ceiling mount having two vertical supports which effect decoupling of the vibration behavior of a microscope mount and an auxiliary mount, the auxiliary mount receiving an equipment box which contains a computer, a control system, and/or an energy source. The invention further concerns a novel interface for mounts having a damping element, and an adjusting apparatus for correcting the position of an action circle plane of a microscope.

Abstract: A stereomicroscope has a left and a right stereo radiation path and an adjusting device for selecting a stereo base. A main lens is arranged between an object to be observed and the adjusting device, which may be designed as an opto-mechanical switching device. The arrangement allows an integrated structure with low light losses.