Abstract: The present invention relates to an illumination device for a stereomicroscope, in particular a surgical microscope for eye surgery, having at least one light source (10), a collector lens system (14), an aperture diaphragm (16), a condenser lens system (18), and an objective (22), illumination light being directed from the light source (10) through the collector lens system (14), the aperture diaphragm (16), the condenser lens system (18), and the objective (22) into the object plane (E19), the aperture diaphragm (16) being provided as a double orifice plate or four-orifice plate.

Abstract: An operating microscope system (200) for ophthalmology, particularly vitrectomy, is proposed, which comprises an operating microscope (10) with a microscope illumination (15) and a wide-angle device (20) arranged on the objective side in front of the operating microscope (10), the wide-angle device (20) comprising a wide-angle lens (21) arranged on the object side of the wide-angle device (20) and a prism arrangement (22) for righting the image, arranged on the microscope side of the wide-angle lens (21), wherein the wide-angle device (20) comprises an illuminating unit (25) which is arranged so as to illuminate an object (40) arranged in front of the wide-angle lens (21) through the wide-angle lens (21) by means of an illuminating light (29).

Abstract: A microscope (1) having a principal observer's beam path (2a) and an assistant's beam path (3a, 3b), and having an optical beam splitter device (5, 15) for generating a documentation beam path (4), where the beam splitter device (5, 15) in a first position outcouples the documentation beam path from the principal observer's beam path (2a), and in a second position outcouples it from the assistant's beam path (3b).

Abstract: An operating microscope system (200) for ophthalmology, particularly vitrectomy, is proposed, which comprises an operating microscope (10) with a microscope illumination (15) and a wide-angle device (20) arranged on the objective side in front of the operating microscope (10), the wide-angle device (20) comprising a wide-angle lens (21) arranged on the object side of the wide-angle device (20) and a prism arrangement (22) for righting the image, arranged on the microscope side of the wide-angle lens (21), wherein the wide-angle device (20) comprises an illuminating unit (25) which is arranged so as to illuminate an object (40) arranged in front of the wide-angle lens (21) through the wide-angle lens (21) by means of an illuminating light (29).

Abstract: An image sensor (1a to 1d) is described, encompassing a substrate (2) as well as multiple photoelectronic image converter cells (3a to 3d) arranged thereon or therein. According to the present invention the area of the image sensor (1a to 1d) is modifiable, the modification in area occurring a) by application of a tensile or compressive force onto the elastically and/or plastically deformable substrate, or b) by application of an electrical voltage to an EAP or to a piezoelectric substrate. A video camera and a microscope encompassing such an image sensor (1a to 1d) are also described.