Abstract: A lamp for automotive front lighting and a vehicle headlight comprising the lamp are described, as well as a method of manufacturing the lamp. The lamp 10 comprises a base 12 for mechanical and electrical connection to an automotive headlight 50. A burner 14 is fixed to the base 12 and comprises an enclosed transparent vessel 22. A first filament 34 is arranged within the vessel 22. A holding wire 30c is arranged within the vessel, and a baffle 40 is arranged proximate to the first filament 34 to partially shield light emitted from the first filament 34. The baffle 40 is fixed to the holding wire 30c. The transparent vessel 22 comprises a vessel wall including a cylindrical portion 24 surrounding the first filament 34. In order to obtain a lamp which may withstand vibration, the vessel wall comprises, within the cylindrical portion 24, a deformed material portion 38 which contacts the baffle 40 or the holding wire 30c. The deformed material portion 38 is shielded from the first filament 34 by the baffle 40.

Abstract: A lamp for automotive front lighting and a vehicle headlight comprising the lamp are described, as well as a method of manufacturing the lamp. The lamp 10 comprises a base 12 for mechanical and electrical connection to an automotive headlight 50. A burner 14 is fixed to the base 12 and comprises an enclosed transparent vessel 22. A first filament 34 is arranged within the vessel 22. A holding wire 30c is arranged within the vessel, and a baffle 40 is arranged proximate to the first filament 34 to partially shield light emitted from the first filament 34. The baffle 40 is fixed to the holding wire 30c. The transparent vessel 22 comprises a vessel wall including a cylindrical portion 24 surrounding the first filament 34. In order to obtain a lamp which may withstand vibration, the vessel wall comprises, within the cylindrical portion 24, a deformed material portion 38 which contacts the baffle 40 or the holding wire 30c. The deformed material portion 38 is shielded from the first filament 34 by the baffle 40.

Abstract: The invention is directed to a method for equalizing arbitrary parfocal lengths of objectives when focusing stereomicroscopes and macroscopes, including an objective changer (4) equipped with differently parfocalized and/or non-parfocalized objectives (5), and focusing devices for automatic focusing when changing an object or objective. The focusing devices are controlled by control devices according to object and objective changer data and data for the travel path stored previously in a storage device. When changing non-parfocal objectives (5) arranged in an objective changer (4), automatic focusing is carried out. During an objective change, the danger of a collision between objectives (5) arranged in the objective changer (4) and the object or the object carrier (1.

Abstract: An aperture stop device is provided for use in a microscope with at least one adjustable observation parameter. The aperture stop device includes at least one aperture stop (50a, 50b) with an adjustable aperture, that is to say with an adjustable stop opening. The aperture stop (50a, 50b) is adapted to receive an aperture signal representative of an aperture to be adjusted. In addition the aperture stop device includes a control unit (52) for output of the aperture signal to the aperture stop (50a, 50b) in dependence at least on the respectively set value of the observation parameter of the microscope.

Abstract: A surgical microscope (1) for ophthalmology includes a tube unit (5) which permits viewing an area (7) of surgery, especially a forward section of the eye, through a microscope main objective (2). The surgical microscope (1) includes an illuminating system (10) which makes available the illuminating light to illuminate the surgical area (7), especially the forward section of the eye. To provide daylight-like illuminating light, the illuminating system includes a xenon illuminating light source (11) or a metal halide illuminating light source. At least one interference filter (22, 23) is provided in the illuminating beam path (16). The cutoff frequency of the interference filter lies such that illuminating light in the ultraviolet range is filtered out and illuminating light in the visible wavelength range is attenuated, if at all, to an insignificant extent in order to reduce the phototoxicity of the illuminating light for the human eye.

Abstract: A microscopy system for eye surgery with an objective lens is suggested, which provides a retroillumination system to generate a so-called red reflex illumination during an eye-surgical treatment, in particular during a cataract operation.

Abstract: An aperture stop device is provided for use in a microscope with at least one adjustable observation parameter. The aperture stop device includes at least one aperture stop (50a, 50b) with an adjustable aperture, that is to say with an adjustable stop opening. The aperture stop (50a, 50b) is adapted to receive an aperture signal representative of an aperture to be adjusted. In addition the aperture stop device includes a control unit (52) for output of the aperture signal to the aperture stop (50a, 50b) in dependence at least on the respectively set value of the observation parameter of the microscope.

Abstract: A surgical microscope (1) for ophthalmology includes a tube unit (4) which permits viewing an area (5) of surgery, especially a forward section of the eye, through a microscope main objective (2). The surgical microscope (1) includes an illuminating system (10) which makes available the illuminating light to illuminate the surgical area (5), especially the forward section of the eye. To provide daylight-like illuminating light, the illuminating system includes a xenon illuminating light source (11) or a metal halogen illuminating light source. At least one interference filter (22, 23) is provided in the illuminating beam path (15a). The cutoff frequency of the interference filter lies such that illuminating light in the ultraviolet range is filtered out and illuminating light in the visible wavelength range is attenuated, if at all, to an insignificant extent in order to reduce the phototoxicity of the illuminating light for the human eye.

Abstract: A microscopy system for eye surgery with an objective lens is suggested, which provides a retroillumination system to generate a so-called red reflex illumination during an eye-surgical treatment, in particular during a cataract operation.

Abstract: An operation microscope includes an illuminating device and an interference filter in the illuminating beam of the illuminating device. The interference filter is suitable for incorporation into the operation microscope. In order to prevent the yellow tinge that is present in long-known UV interference filters, the interference layer applied directly to the carrier substrate is a layer between 8 and 12 nm thick of yttrium fluoride, thorium fluoride, lanthanum fluoride or cerium fluoride.

Abstract: The invention is directed to an illuminating arrangement (5) for a surgical microscope (1) having an illuminating beam path (7) which runs essentially coaxially to the optical axis (9) of the surgical microscope. The illuminating arrangement (5) includes an optical ancillary element (15) having a positive refractive power. The ancillary element (15) can be selectively pivoted into and out of the illuminating beam path. The illuminating aperture in the region of the optical axis (9) of the surgical microscope (1) is increased by pivoting the optical ancillary element (15) into the illuminating beam path (7). This is done without changing the viewing focal intercept of the surgical microscope (1).