Abstract: A contactless visualization system for a microscope for eye surgery includes an ophthalmic loupe positionable in front of a patient's eye and supplies a real and vertically and laterally inverted image of the fundus in an intermediate image plane observable with the microscope. The loupe includes first and second lens elements. When positioned in front of the eye, the first lens element is closer to the eye than the second. A wall extending from the first to the second lens element has a free end in a form of a mount which holds the second lens element. The wall has a passage opening formed therein for removing liquid possibly present in an intermediate space between the first lens element and the second lens element. The first lens element has a boundary surface facing the second lens element. The passage opening includes a lower edge bordering on the boundary surface of the first lens element.

Abstract: A surgical microscope includes an optical assembly to image an object plane with a microscope main objective system, through which a first stereoscopic partial beam path with a first optical axis and a second stereoscopic partial beam path with a second optical axis pass. An illumination device includes a light source assembly to provide illumination light in a luminous plane, with a radiant field stop, and an illumination optical unit which at least partially images a luminous object arranged in the luminous plane in the illumination beam path into a luminous image plane located in the microscope main objective system or for the vertical distance z of which from the microscope main objective system on the side facing the object region or the side facing away from the object region, in relation to a focal length f of the microscope main objective system, the following applies: z/f<10%.

Abstract: The present invention relates to a new compound and the dehydrogenation of that compound to produce retinal.

Abstract: A crash management system for a motor vehicle, the crash management system having a cross member for the connection to a body shell structure of the motor vehicle, the cross member comprising a front flange, a rear flange and two cross walls connecting the front flange and the rear flange for the formation of a closed cross section, and the crash management system having two reinforcement areas in the area of the rear flange which extend at a distance from one another in the longitudinal direction of the cross member, which are disposed parallel to one another and which are disposed above and below a center plane extending at least substantially parallel to the cross walls, the reinforcement areas projecting in the direction of the front flange, the two reinforcement areas being formed by longitudinal ribs at least indirectly connected to the rear flange.

Abstract: The present invention relates to a new process for the production of vitamin A and/or its derivatives.

Abstract: A liquid-cooled power electronics unit includes a planar circuit board body having conductor tracks, a wet side with a wet space for carrying a dielectric cooling liquid, and a fluidically, separated dry side, wherein at least two high-voltage power semiconductors are arranged on the circuit board body on the wet side within the wet space, the high-voltage power semiconductors being cooled by the cooling liquid, and an electronic low-voltage circuit is arranged on the dry side of the circuit board body.

Abstract: The present invention relates to a new process for the production of retinal or hydrogenated form of retinal.

Abstract: A crash box (3) comprising a hollow profile (38) extending along a longitudinal direction (X) and having a crush length (LCB), said hollow profile (38) having at least two chambers (4) characterized in that it comprises at least a deformable element (7, 7?, 7?) contained into at least one chamber (4) contributing to the energy absorption capability of said crash box (3).

Abstract: A method ascertains a drive clearance after a software update for a set of controllers of a vehicle. The method includes determining a first deviation between the first target state and the first actual state of the software updated. If the first deviation indicates, then a second deviation between the second target state of the set of second target states and the second actual state of the set of second actual states for a first controller is determined. The first controller is linked to a class from a specified controller classification, and one or more properties of controllers are linked to each class of the specified controller classes. If a second deviation indicates, and if a property of the ascertained class of the first controller indicates that the first controller can be downgraded, then the first controller is downgraded after the software update.

Abstract: A contactless visualization system for a microscope for eye surgery includes an ophthalmic loupe positionable in front of a patient's eye and supplies a real and vertically and laterally inverted image of the fundus in an intermediate image plane observable by the microscope. The loupe includes a first and a second lens element. Positioned in front of the eye, the first lens element is closer to the eye than the second. A wall extending from the first to the second lens element has a free end in a form of a mount which holds the second lens element. The wall has a passage opening formed therein for removing liquid possibly present in an intermediate space between the first and second lens element. The first lens element has a boundary surface facing the second. The passage opening includes a lower edge bordering on the boundary surface of the first lens element.

Abstract: A microscopy system and a method for operating a microscopy system are provided. The microscopy system includes a tracking camera configured to detect a pose of an object, a tracking illumination device, and a controller configured to control the tracking illumination device and/or the tracking camera. Illumination information is determinable by evaluating an image representation from the tracking camera and/or pose information of the object is determinable relative to at least one illumination device and/or a working distance is determinable, with the illumination by the tracking illumination device and/or an image capture by the at least one tracking camera being able to be set based on the illumination information and/or based on the pose information of the object and/or based on the working distance.

Abstract: The application relates to a process for the preparation of a compound of formula (II) by cyclisation of a polyene of formula (I), and to an intermediate of formula (III). The obtained compounds are useful intermediates in the preparation of specific isoprenoids, preferably in the production of vitamin A and derivatives of vitamin A.

Abstract: The present invention relates to a new process for the production of specific intermediates, which are preferably used in the production of vitamin A, vitamin A acetate, or ?-carotene and derivatives thereof, e.g. canthaxanthin, astaxanthin or zeaxanthin.

Abstract: A microscopy system includes a tracking camera for pose detection of a marker, a device configured to determine a working distance, a movable optical element, the pose of which can be changed to set a capture region of the tracking camera and/or at least two tracking illumination devices, at least one optical element for beam guidance of the radiation generated by the tracking illumination devices, and a controller configured to control the movable optical element and/or the tracking illumination devices, in which the pose of the movable optical element can be set based on the working distance and/or in which an operating mode and/or an illumination region of the tracking illumination devices can be set based on the working distance. In addition, a method for operating a microscopy system is provided.

Abstract: A surgical microscope includes an optical assembly to image an object plane with a microscope main objective system, through which a first stereoscopic partial beam path with a first optical axis and a second stereoscopic partial beam path with a second optical axis pass. An illumination device includes a light source assembly to provide illumination light in a luminous plane, with a radiant field stop, and an illumination optical unit which at least partially images a luminous object arranged in the luminous plane in the illumination beam path into a luminous image plane located in the microscope main objective system or for the vertical distance z of which from the microscope main objective system on the side facing the object region or the side facing away from the object region, in relation to a focal length f of the microscope main objective system, the following applies: z/f<10%.

Abstract: The present invention relates to a new dehydrogenation process of specific compounds.

Abstract: Processes for synthesizing new compounds that may usefully be employed in organic synthesis, especially in the synthesis of vitamin A or ?-carotene and derivatives thereof, e.g. canthaxanthin, astaxanthin or zeaxanthin are disclosed. The new compounds are especially useful as intermediates (building blocks) in the synthesis of vitamin A or ?-carotene, preferably vitamin A.

Abstract: A power semiconductor module includes a first and second insulating substrate, which is arranged parallel to and at a distance from the first insulating substrate. The first insulating substrate and the second insulating substrate each include an insulating layer, an inner metallization layer, and an outer metallization layer. The power semiconductor module also includes a first cooling device, which is arranged thermally conductively on the outer metallization layer of the first insulating substrate, a second cooling device, which is arranged thermally conductively on the outer metallization layer of the second insulating substrate. The power semiconductor module also includes a power semiconductor, arranged between the first insulating substrate and the second insulating substrate.

Abstract: A method ascertains a drive clearance after a software update for a set of controllers of a vehicle. The method includes determining a first deviation between the first target state and the first actual state of the software updated. If the first deviation indicates, then a second deviation between the second target state of the set of second target states and the second actual state of the set of second actual states for a first controller is determined. The first controller is linked to a class from a specified controller classification, and one or more properties of controllers are linked to each class of the specified controller classes. If a second deviation indicates, and if a property of the ascertained class of the first controller indicates that the first controller can be downgraded, then the first controller is downgraded after the software update.

Abstract: The invention relates to a system for charging and for holding a battery-powered vehicle (20, 30).