Abstract: A varioscope optical unit has a positive member (9) with a positive refractive power and a negative member (11) with a negative refractive power arranged along an optical axis (OA) so that the negative member follows the positive member along an observation direction (B). At least one of the members is displaceable along the optical axis. Each member has a first termination lens surfaces (23, 27) counter to the observation direction (B) and second termination lens surface (25, 29) in the observation direction. The second termination lens surface of the positive member and the first termination lens surface of the negative member are concave when viewed in the observation direction (B) and have radii of curvature of at most 500 mm. The second termination lens surface of the negative member is convex when viewed in the observation direction (B) and has a radius of curvature of at most 70 mm.

Abstract: An illumination arrangement includes illumination optics defining an optical axis and a light source for generating at least one illumination beam path for illuminating an object field at a specific illumination angle with a viewing beam path. At least one mirror is provided in the illumination beam path for deflecting light from the light source and the mirror has a longitudinal extent along the optical axis. A light-emitting surface region of the light source is variable (x) perpendicular to the optical axis without movable components. The illumination optics are embodied in such a way for obtaining a desired illumination that an illumination pupil is imaged within the longitudinal extent of the mirror.

Abstract: An illumination arrangement includes illumination optics defining an optical axis and a light source for generating at least one illumination beam path for illuminating an object field at a specific illumination angle with a viewing beam path. At least one mirror is provided in the illumination beam path for deflecting light from the light source and the mirror has a longitudinal extent along the optical axis. A light-emitting surface region of the light source is variable (x) perpendicular to the optical axis without movable components. The illumination optics are embodied in such a way for obtaining a desired illumination that an illumination pupil is imaged within the longitudinal extent of the mirror.

Abstract: A varioscope optical unit has a positive member (9) with a positive refractive power and a negative member (11) with a negative refractive power arranged along an optical axis (OA) so that the negative member follows the positive member along an observation direction (B). At least one of the members is displaceable along the optical axis. Each member has a first termination lens surfaces (23, 27) counter to the observation direction (B) and second termination lens surface (25, 29) in the observation direction. The second termination lens surface of the positive member and the first termination lens surface of the negative member are concave when viewed in the observation direction (B) and have radii of curvature of at most 500 mm. The second termination lens surface of the negative member is convex when viewed in the observation direction (B) and has a radius of curvature of at most 70 mm.

Abstract: A surgical microscope (100) has a viewing optic (101, 104, 115) which allows a viewing person to view the enlarged display of an object region (116) in a viewing area (117). The viewing optic (101, 104, 115) has a continuously adjustable magnification system (104) with which a viewing optic adjusting unit (119) is associated. The surgical microscope (100) has an adjustable illuminating system (150), which provides illuminating light (151) for the object region (116), to illuminate the object region in an illuminated area (152) using illuminating light (151) of adjustable radiation intensity. An illumination system control unit (175) is provided in the surgical microscope (100), the control unit being connected to the viewing optic adjusting unit (119) for receiving information as to the adjusted magnification of the viewing optic (101, 104, 115).

Abstract: The invention relates to a surgical microscope having a microscope main objective for the visualization of an object plane in an object region. The objective is passed through by a first stereoscopic component beam path and by a second stereoscopic component beam path. The ophthalmologic surgical microscope includes an adjustable illuminating arrangement which makes illuminating light available. The illuminating arrangement has an illuminating optic having a beam deflecting unit which is mounted on the side of the objective facing away from the object region in order to direct the illuminating light through the objective to the object region. In a first position of the illuminating arrangement, the illuminating light passes through the cross sectional area of the objective in an area section, which at least partially surrounds the optical axis of the first stereoscopic component beam path and/or the optical axis of the second stereoscopic component beam path.

Abstract: The invention relates to a surgical microscope (1) having a microscope main objective (12) for the visualization of an object plane (45) in an object region (9). The microscope main objective (12) is passed through by a first stereoscopic component beam path (5) and by a second stereoscopic component beam path (7). The ophthalmologic surgical microscope (1) includes an adjustable illuminating arrangement (15) which makes illuminating light available. The illuminating arrangement (15) has an illuminating optic having a beam deflecting unit (19) which is mounted on the side of the microscope main objective (12) facing away from the object region (9) in order to direct the illuminating light through the microscope main objective (12) to the object region (9).

Abstract: A surgical microscope (100) has a viewing optic (101, 104, 115) which allows a viewing person the enlarged display of an object region (116) in a viewing area (117). The viewing optic (101, 104, 115) has a continuously adjustable magnification system (104) with which a viewing optic adjusting unit (119) is associated. The surgical microscope (100) has an adjustable illuminating system (150), which provides illuminating light (151) for the object region (116), in order to illuminate the object region in an illuminated area (152) using illuminating light (151) of adjustable radiation intensity. An illumination system control unit (175) is provided in the surgical microscope (100), the control unit being connected to the viewing optic adjusting unit (116, 117) for receiving information as to the adjusted magnification of the viewing optic (101, 104, 115).

Abstract: An optical system made up of lens arrays and normal lenses is particularly suitable for use as a massive parallel reader (approximately 102 channels) for microtiter plates and the like in absorption, fluorescence and luminescence.