Abstract: A display device is provided for generating an image which is perceivable, by a viewer (M) of an object located in an object plane (O), as being superimposed on the object, said device comprising an image generating device (1) for generating the image in an image plane (B) and a superimposing unit (7), wherein the image generating device (1) and the superimposing unit (7) are mounted on a support device (12), which is placeable on the head of the viewer (M), and the image generating device (1) comprises a focusing unit (3) by which the distance from the image plane (B) to the support device (12) is changeable and which includes a lens (4) having a variable refractive index as well as a control unit (6) for adjusting the refractive index of the lens (4), wherein, when the support device (12) is placed on the head of the viewer (M), the superimposing unit (7) effects superposition of the generated image on the object for the viewer (M) and the control unit (6) adjusts the refractive index of the lens (4) such t

Abstract: A displaceable support stand (1) includes a support stand base (5) with a support surface (6) which is adapted to rest on the ground, a lifting device for lifting the support stand base (5) and therewith the support stand (1) above the ground and a displacement device which permits displacement of the support stand (1). The lifting and the displacement devices can be embodied by a device for producing an air cushion. A device of that kind can include for example a compressor (18), an accumulator (20) for the power supply for the compressor (18) and air nozzles (16).

Abstract: An adjusting device (3) is suitable especially for use on a stand (1) for a surgical microscope (2). The adjusting device (3) makes it possible to move the surgical microscope (2) in a plane (9) perpendicular to the optical axis (8) of the surgical microscope (2). For this purpose, a transmission is provided in the adjusting device (3) which includes a coupling plate which is operatively connected to two force-transmitting elements. When this transmission is moved, at least one of the force-transmitting elements rolls off on the coupling plate. Alternatively, this transmission can be built up as a four-point linkage chain or contain a rhombic mechanism or lever mechanism. It is also possible to configure the transmission with belt elements or to configure the same as an eccentric arrangement having two offset rotation centers.

Abstract: An arrangement for controlling the deflection of an electron beam in a vapor deposition system includes a control unit to which are assigned deflection modules (23, 27) which can be driven in accordance with respective selected functions. By driving these deflection modules, the electron beam can be deflected in two coordinate directions. At least one of the selected functions has a time-changing term via which the periodicity of the deflection of the electron beam (14) changes with respect to this coordinate direction. The term can be pregiven manually or automatically. The invention also relates to a method for controlling the deflection of the electron beam in a vapor deposition system.

Abstract: The invention relates to a projection lens comprising a lens assembly that has at least one first narrowing of the group of light beams. A lens with a non-spherical surface is located in front of and/or behind the first narrowing.

Abstract: The invention relates to a method for recording and displaying fluorescence images with high spatial resolution. Several recordations of an image of an object are made sequentially with an electronic camera and, between recordations, the image of the object and the electronic camera are shifted relative to each other. The recordations are subsequently unified to a compiled image of higher spatial resolution. Before or after the partial images are brought together, the signals, which belong to image points of the images and which are obtained at different times, are amplified with amplification factors which are dependent upon the time intervals between the image recordations and are essentially reciprocal to the time dependency of the fluorescence. Artefacts caused by decreasing fluorescence intensities (fading, bleaching) are thereby avoided. These fluorescence intensities decrease as a function of time.

Abstract: In a holding arrangement (101) for a medical-optical instrument (103), an electric motor is provided in a rotational joint (111, 119) to compensate a load torque occurring in this rotational joint. This electric motor is supplied with current in correspondence to a detected position of the rotational joint (111, 119). A current control curve required for this purpose is stored in a memory. This current control curve can be determined in that the rotational joints are deflected with the electric motor into predetermined positions and the current demand needed therefor is detected.

Abstract: A mouth switch arrangement comprises a mouth switch operable by a mouth of an operator and attachable by a holding device to a base part. The holding device comprises a mouth switch support having a locking member shiftable in a longitudinal direction of a rod of the holding device and a pivot member pivotable about the locking member. The mouth switch is provided for use on a surgical stereo microscope.

Abstract: A coordinate measuring apparatus includes probe pin(s) fixed to a probe head displaceable in coordinates. The probe pin includes probe shafts having respective ends to which probe balls are attached. At least two of the probe shafts are differently oriented when the probe pins are fixed to the probe head. A control and evaluation unit controls the course of measurement and evaluates the measuring points recorded. At least one probe shaft is determined for measuring a geometric element on a workpiece by determining at least one characteristic piece of directional information for the points to be measured of a geometric element to be measured on the workpiece, either on the basis of the measured measuring points or according to predefined nominal data of the geometric element. At least one probe shaft for measuring the measuring points is determined from the directional information.

Abstract: An objective has a front group, a focus group displaceable along the optical axis and a follow-on lens group having a diaphragm. The front group is arranged at the objective end. The lens group having the diaphragm includes at least two composite lenses and/or two positive lenses and/or the back focus can be adjusted. An objective series is presented wherein all objectives of the series have a uniform appearance and/or the diaphragm is arranged in all objectives proceeding from the image plane at the same location.

Abstract: The invention relates to an interferometer arrangement (1000) having at least one measuring beam path for providing light in an object area, at least one reference beam path and at least one unit for superposing light of the measuring beam path with light of the reference beam path and a unit for detecting an interference phenomenon caused by light from the object area and light from the reference beam path. The invention further relates to a method for measuring the velocity of an object with an interferometer arrangement. In the interferometer arrangement, the unit for detecting has a spatial resolution which corresponds to the characteristic spatial period of the interference phenomenon. In evaluating the time change of the interference signal, the movement of stray centers can be measured. Use of such an interferometer arrangement in a surgical microscope allows to visualize areas of a field of surgery which cannot be accessed with light in the visible spectrum.

Abstract: A surgical microscope arrangement comprises a stand unit with a surgical microscope having an ocular unit and a tubular unit. The surgical microscope is carried by a stand unit in holding the ocular unit while allowing for pivoting of the tubular unit. When the tubular unit is pivoted, the ocular unit remains stationary. This can be achieved by providing an interface unit in the surgical microscope connecting the tubular unit with the ocular unit. The interface is formed as a rotary joint and includes a first portion which is to be connected to the ocular unit and the stand while the second portion of the interface unit is connected to the tubular unit of the microscope. The second portion of the interface unit can be pivoted with respect to the first portion of the interface unit.

Abstract: An arrangement for microlithographic projection exposure at high aperture achieve a contrast increase by the polarization of the light perpendicular to the plane of incidence on the resist. Arrangements are provided which influence the tangential polarization or the linear polarization adapted to the dipole illumination in the illuminating system and in the reduction objective.

Abstract: The invention relates to a stand arrangement (100) for a medical-optical instrument. The stand arrangement includes a first link (104) which is pivotally supported on a holding unit (101) by a first rotational joint. The stand arrangement (100) further includes a second link (106) which is rotatably connected to the first link (104) via a second rotational joint (105). A take-up unit (109) for medical-optical equipment is held in a forward section (107, 108) of the second link (106) by a third rotational joint. The take-up unit (109) includes a front link (111) which, in turn, is connected via a third link (112) and a fourth link (113) to the second rotational joint (105). The holding unit (101) and the fourth link (113) are coupled with the aid of a toothed gear unit (118) in such a manner that the orientation of the front link (111) does not change with the movement of the first link (104).

Abstract: A method and an arrangement for microlithographic projection exposure at high aperture achieve a contrast increase by the polarization of the light perpendicular to the plane of incidence on the resist. Arrangements are provided which influence the tangential polarization or the linear polarization adapted to the dipole illumination in the illuminating system and in the reduction objective.

Abstract: An HMD device is provided, comprising a frame, which is mountable on the head of a user, an image-generating device mounted on said frame and comprising projection optics, a connecting device and glasses for correcting an eye deficiency of the user, said glasses not having sides and said glasses being releasably connectable with said frame by said connecting device, said glasses being arranged following said projection optics when the glasses are connected with the frame.

Abstract: The invention relates to stereoscopic display system having a single display (7). Right and left partial images are sequentially displayed on the display (7). For the viewing, two separate component beam paths (21, 22) for viewing only left partial images (21) and only right partial images (22) and a switchover device (5, 9) are provided. The switchover device (5, 9) couples in the data, which is shown on the display, from a common part of the viewing beam path alternately into the two separate component beam paths in synchronism with the display of the right and left partial images on the display. In one embodiment, the switchover device includes a polarization switch (5) and a polarization beam splitter (9). The polarization switch (5) is arranged either in the illuminating beam path or in the common part of the viewing beam path.

Abstract: The invention is directed to a probe for coordinate measuring apparatus. The apparatus includes measuring systems (15, 16, 17) for measuring the deviation of the flexible part (10) of the probe and a damping device damps the flexible part (10) of the probe. The damping device is embodied as at least one friction brake (19, 27) and the friction force of the friction brake is adjustable. The flexible part (10) of the probe can also be blocked by the friction brake (19, 27).

Abstract: A therapeutic radiation source includes an in situ radiation detecting system for monitoring in real time an amount of the therapeutic radiation that has been generated. An electron source generates electrons in response to light that is transmitted through a fiber optic cable and impinges upon the electron source. The electrons are accelerated toward the target and strike the target, causing the target to emit therapeutic radiation, such as x-rays. A scintillator is disposed along a path of a portion of the emitted therapeutic radiation, and generates scintillator light corresponding to the intensity of the therapeutic radiation that is incident upon the scintillator. A photodetector in optical communication with the scintillator produces a signal indicative of the intensity of the therapeutic radiation incident upon the scintillator.

Abstract: A projection objective has at least five lens groups (G1 to G5) and has several lens surfaces. At least two aspheric lens surfaces are arranged so as to be mutually adjacent. These mutually adjacently arranged lens surfaces are characterized as a double asphere. This at least one double asphere (21) is mounted at a minimum distance from an image plane (0?) which is greater than the maximum lens diameter (D2) of the objective.