Abstract: The present invention relates to a tracker and a surveying apparatus comprising the tracker, which improve the reliability of tracking a target. The tracker comprises a first imaging region having a plurality of pixels for taking a first image of a scene including the target; a second imaging region having a plurality of pixels for taking a second image of a scene including the target; a control unit to receive a timing signal indicating a time duration during which an illumination illuminating the target in the scene is switched on and off, control the first imaging region to take the first image of the scene when the timing signal indicates that the illumination unit is switched on, and control the second imaging region to take the second image when the illumination is switched off; and a read out unit configured to read out the first image from the first imaging region and the second image from the second imaging region and to obtain a difference image.

Abstract: A surveying instrument comprises a base; an alidade rotatable about a first axis relative to the base; and an optical measuring instrument having a measuring axis rotatable about a second axis relative to the alidade. A beam path can be provided for a light beam using components including a light source, lenses, mirrors, beam splitters, and a position-sensitive detector. The surveying can be calibrated by performing plural measurements at different orientations of the alidade relative to the base and different orientations of the measuring instrument relative to the alidade using the above components.

Abstract: A system for manufacturing one or more single crystals of a semiconductor material by physical vapor transport (PVT) includes a reactor having an inner chamber adapted to accommodate a PVT growth structure for growing the one or more single crystals inside. The reactor accommodates the PVT growth structure in an orientation with a growth direction of the one or more single crystals inside the PVT growth structure substantially horizontal with respect to a direction of gravity or within an angle from horizontal of less than a predetermined value.

Abstract: A probe carrier arrangement, especially for an exhaust system of an internal combustion engine, includes a probe socket (14) provided at a probe carrier body (12). The probe socket (14) has at least one insert-receiving opening (24) extending in a direction of an insert-receiving opening longitudinal axis (E). A probe carrier insert (28) is arranged in the insert-receiving opening (24). The probe carrier insert (28) has at least one probe-receiving opening (36) extending in a direction of a probe-receiving opening longitudinal axis (S).

Abstract: The present invention relates to a silicon carbide (SiC) substrate with improved mechanical and electrical characteristics. Furthermore, the invention relates to a method for producing a bulk SiC crystal in a physical vapor transport growth system. The silicon carbide substrate comprises an inner region (102) which constitutes at least 30% of a total surface area of said substrate (100), a ring shaped peripheral region (104) radially surrounding the inner region (102), wherein a mean concentration of a dopant in the inner region (102) differs by at maximum 5·1018 cm?3, preferably 1·1018 cm?3, from the mean concentration of this dopant in the peripheral region (104).

Abstract: A bulk SiC single crystal is produced by placing an SiC seed crystal in a crystal growth region of a growth crucible, and introducing SiC source material into an SiC reservoir region, and the bulk SiC single crystal is grown on from an SiC growth gas phase by deposition. The growth crucible is surrounded by an insulation that extends rotationally symmetrically and axially towards the central middle longitudinal axis. The insulation has mutually concentric insulation cylinder components and the insulation is notionally divided into insulation ring segments that are in turn notionally divided into volume elements. The insulation cylinder components are selected and positioned relative to one another such that every volume element of the insulation ring segment in question has a volume element density varying by not more than 10% from an average insulation ring segment density of the insulation ring segment in question.

Abstract: The present invention relates to a silicon carbide (SiC) substrate with improved mechanical and electrical characteristics. Furthermore, the invention relates to a method for producing a bulk SiC crystal in a physical vapor transport growth system. The silicon carbide substrate comprises an inner region (102) which constitutes at least 30% of a total surface area of said substrate (100), a ring shaped peripheral region (104) radially surrounding the inner region (102), wherein a mean concentration of a dopant in the inner region (102) differs by at maximum 5·1018 cm?3, preferably 1·1018 cm?3, from the mean concentration of this dopant in the peripheral region (104).

Abstract: The present invention provides monocrystalline 4H—SiC substrates having a specific orientation of its crystal structure which is set such as to reduce or even eliminate the occurrence of cracks or fissures during mechanical processing, and method of producing same. The monocrystalline 4H—SiC substrate, which has a longitudinal axis and an at least partially curved lateral surface parallel to said longitudinal axis, is characterized in that the crystal structure of the 4H—SiC substrate is oriented with respect to the longitudinal axis such that at each position on the lateral surface of the semi-finished product there is a line segment which is intersected by at least a predetermined minimum number of parallel cleavage planes of the {1010} form per unit length, wherein the line segment is defined by a plane tangent to the lateral surface at said position.

Abstract: The present invention provides monocrystalline 4H—SiC semi-finished products having a specific orientation of its crystal structure which is set such as to reduce or even eliminate the occurrence of cracks or fissures during mechanical processing, and method of producing same. The monocrystalline 4H—SiC semi-finished product, which has a longitudinal axis and an at least partially curved lateral surface parallel to said longitudinal axis, is characterized in that the crystal structure of the 4H—SiC semi-finished product is oriented with respect to the longitudinal axis such that at each position on the lateral surface of the semi-finished product there is a line segment which is intersected by at least a predetermined minimum number of parallel cleavage planes of the {1010} form per unit length, wherein the line segment is defined by a plane tangent to the lateral surface at said position.

Abstract: A scanning surveying system comprises a base 5, an alidade 3 mounted on the base, a first motor 6 to rotate the alidade about a first axis 9, a rotating mirror 21 rotatable about a second axis 16, a second motor 23 to rotate the mirror. An optical distance measuring unit 11 is configured to direct measuring light onto the rotating mirror such that it is reflected towards objects and to receive measuring light back from these objects via the rotating mirror. The system further comprises a camera 81 and a controller for controlling the first motor based on the images recorded by the camera such that the measuring light is reflected from the rotating mirror in a direction corresponding to a selected location within the image.

Abstract: An optical surveying instrument is provided with an optical arrangement that includes at least one lens and the viewing element defining a viewing direction in the field of view. The distance measurement unit emits light beam towards the field of view and measured the distance to an object in the field of view based on a reflection of the light beam from the object. A movable mirror is arranged to direct the light beam towards the object and a mirror control unit is provided for reading calibration values from a calibration value memory and for moving the movable mirror using the calibration values to adjust the direction of the light beam to be aligned with the viewing direction.

Abstract: The present invention relates to a novel method for manufacturing rigid epoxy foams. Furthermore the present invention relates to materials, especially novel two-component epoxy systems that are used to conduct this method. This novel process is characterized in that an epoxy resin is mixed with a blowing agent, especially an encapsulated blowing agent, and afterwards with an ionic liquid. Surprisingly the reaction, including foaming, starts at room temperature after a short time like after only 2 to 3 minutes. In summary, the present invention comprises a two-component foam-in-place structural material and a process for producing a rigid epoxy foam.

Abstract: The present invention relates to a chamfered silicon carbide substrate which is essentially monocrystalline, and to a corresponding method of chamfering a silicon carbide substrate. The silicon carbide substrate (100) comprises a main surface (102) and a circumferential end face surface (114) which is essentially perpendicular to the main surface (102), and a chamfered peripheral region (110), wherein a first bevel surface (106) of the chamfered peripheral region (110) includes a first bevel angle (a1) with said main surface (102), and wherein a second bevel surface (108) of the chamfered peripheral region (110) includes a second bevel angle (a2) with said end face surface (114), wherein, in more than 75% of the peripheral region, said first bevel angle (a1) has a value in a range between 20° and 50°, and said second bevel angle (a2) has a value in a range between 45° and 75°.

Abstract: An apparatus for use in a rolling basket of a tillage implement, the rolling basket comprising a plurality of elongated bars or blades spaced apart around a plurality of spaced apart rings, the bars or blades attached to the spaced apart rings, the apparatus includes an elongated support structure extending through a central axis of the rolling basket and a plurality of vertical stationary paddles spaced apart along the elongated support structure between the horizontally spaced apart rings.

Abstract: A stent delivery device includes a sheath covering a compressed stent and a housing. The housing includes a mover reel coupled to an actuator that rotates the mover reel in a winding direction when actuated. A sheath pull wire is coupled to the mover reel and the sheath. Rotation of the mover reel in the winding direction winds the sheath pull wire on the mover reel and moves the sheath in a proximal direction. A pre-mover is provided separate from the actuator, the pre-mover including an arm having a proximal end engaged with the mover reel to prevent rotation in the locked position. The pre-mover includes a pre-mover actuator coupled to the arm and having a portion projecting outside of the housing, wherein movement of the pre-mover actuator disengages the arm from the mover reel and rotates the mover reel a predetermined amount in the winding direction.

Abstract: The present invention relates to a silicon carbide (SiC) substrate with improved mechanical and electrical characteristics. Furthermore, the invention relates to a method for producing a bulk SiC crystal in a physical vapor transport growth system. The silicon carbide substrate comprises an inner region (102) which constitutes at least 30% of a total surface area of said substrate (100), a ring shaped peripheral region (104) radially surrounding the inner region (102), wherein a mean concentration of a dopant in the inner region (102) differs by at maximum 5·1018 cm?3, preferably 1·1018 cm?3, from the mean concentration of this dopant in the peripheral region (104).

Abstract: A hand-held actuator device for releasing into the body from a delivery system a medical prosthesis, like a stent, comprising a frame that acts as a housing, a reel for receiving a wire, a manually operable slider mounted to the frame and a one-way connection between the slider and the reel. Actuating the slider causes the reel to wind up the wire and release the medical prosthesis.

Abstract: A method for operating a photoelectric barrier as well as a photoelectric barrier with at least one first and one second optoelectronic machine guard. The first optoelectronic machine guard has a first transmitter and the second optoelectronic machine guard has a second transmitter and receiver unit. The transmitters of the first optoelectronic machine guard are successively activated during a run of a first cycle so as to emit a single light pulse, and the transmitters of the second optoelectronic machine guard are successively activated during a run of a second cycle so as to emit a single light pulse. The cycles occur substantially simultaneously. A duration of the first cycle is lengthened or shortened by the duration of a first phase offset ?A and that the duration of the second cycle is lengthened or shortened by the duration of a second phase offset ?B.

Abstract: An apparatus for use in a rolling basket of a tillage implement, the rolling basket comprising a plurality of elongated bars or blades spaced apart around a plurality of spaced apart rings, the bars or blades attached to the spaced apart rings, the apparatus includes an elongated support structure extending through a central axis of the rolling basket and a plurality of vertical stationary paddles spaced apart along the elongated support structure between the horizontally spaced apart rings.

Abstract: A surveying system, comprises a support; a rotating mirror unit including a mounting structure, a motor mounted on the mounting structure and having a shaft rotatable about a first axis, and a mirror mounted on the shaft; a measuring unit including a mounting structure and a light source and optics mounted on the mounting structure for directing a beam of measuring light onto the mirror surface; and a window mechanically connecting the mounting structure of the measuring unit and the mounting structure of the rotating mirror unit.