Patents Assigned to Carl-Zeiss-Stiftung
  • Method of operating a surgical microscope arrangement for computer-supported stereotactic microsurgery on a patient
    Patent number: 5513005
    Abstract: A defined determination of the field of view observed through a surgical microscope is made. To achieve this determination, the relative current position of the plane of the field of view to the position of an object detail of interest is detected in a sighting method with the aid of a position detection system operating according to the laser triangulation principle. As soon as the plane of the field of view and the object detail are coincident, then with the aid of detected optical system data, the position of the object detail with reference to the surgical microscope is determined and, with the detected coordinates of the surgical microscope, the position of the field of view is determined in space. The position detecting system required for this purpose operates on an optical basis and can be integrated into the optics of the surgical microscope.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: April 30, 1996
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Werner Muller, Joachim Luber
  • Combination of a viewing and/or documenting apparatus and an endoscope as well as a method of operating the combination
    Patent number: 5496261
    Abstract: The invention is directed to a combination of a viewing and/or documenting apparatus and an endoscope connected forward thereof. The endoscope can be pulled out relative to the apparatus and can be deflected at an angle if desired. A coupling is provided between the focusing position of the main objective of the apparatus and the pull-out length of the endoscope in such a manner that the intermediate image supplied by the endoscope is always focused independently of the particular pull-out length.
    Type: Grant
    Filed: August 1, 1994
    Date of Patent: March 5, 1996
    Assignee: Carl-Zeiss-Stiftung
    Inventor: Ulrich Sander
  • Adjustable stand for an optical viewing apparatus
    Patent number: 5492296
    Abstract: The invention is directed to an adjustable stand for an optical viewing apparatus such as a surgical microscope pivotable about a pivot axis. The adjustable stand and the optical viewing apparatus conjointly define a center of gravity which can shift to produce an unwanted unbalancing torque when accessories are added to the microscope and/or when there is angular movement about the axis. The adjustable stand includes a mounting bracket for attaching the stand at a desired location; a pivot shaft defining the pivot axis; a carrier holding the pivot shaft and an elastically deformable energy storage device mounted on the shaft for releasing stored torque energy in response to the shift to balance the unwanted unbalancing torque. An adjusting device is provided for loading the storage means with a predetermined torque.
    Type: Grant
    Filed: September 21, 1993
    Date of Patent: February 20, 1996
    Assignee: Carl-Zeiss-Stiftung
    Inventor: Klaus Biber
  • Method of controlling a coordinate measuring apparatus
    Patent number: 5491638
    Abstract: The invention is directed to a method for automatically generating travel paths to the next geometric elements to be measured when there is a collision of the probe 25 or the probe head 10, for example, with the workpiece 22. The method utilizes safety-reference surfaces (S1 to S5) placed in the form of an enclosing parallelepiped about the workpiece 22. The shortest collision-free connecting paths (P1-P2-P3) from one geometric element to the next are computed on these safety-reference surfaces.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: February 13, 1996
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Bernd Georgi, Bernd Czepan, Heinz Peter
  • Color corrected ocular
    Patent number: 5488512
    Abstract: The invention is directed to a color corrected ocular having a very simple configuration and excellent correction characteristics. The ocular includes a single lens at the eye end with the single lens having an aspherical surface r.sub.2 and a two-element composite lens (2, 3). The surface r.sub.3 of the composite lens adjacent to the aspherical surface r.sub.2 is a planar surface. In another embodiment, the composite lens includes a planar-convex lens 2 and a planar-concave lens 3 which are cemented to each other at respective convex and concave surfaces. The spacing d.sub.1 between the single lens 1 and the exit pupil 4 is sufficiently large so that the ocular is also suitable for a wearer of spectacles.
    Type: Grant
    Filed: June 28, 1994
    Date of Patent: January 30, 1996
    Assignee: Carl-Zeiss-Stiftung
    Inventor: Franz Muchel
  • Saddle field source
    Patent number: 5488228
    Abstract: The invention is directed to a saddle field source for ions or neutral particles which is asymmetrically configured. The saddle field source preferably has three electrodes and has an improved efficiency.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: January 30, 1996
    Assignee: Carl-Zeiss-Stiftung
    Inventor: Hermann Dobler
  • Method and circuit for a noise-reduced processing of periodical optical signals
    Patent number: 5486858
    Abstract: A method and a circuit are disclosed for a low-noise processing of weak optical signals using normal photodiodes and a CCD-array. A shift register and collecting register effect the synchronous phase-correct accumulation over for example 100 periods and so transmit a signal amplified by this factor to a downstream circuit at a clock frequency reduced by the same factor. The invention is applicable for conducting optoelectronic run-time distance measurements.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: January 23, 1996
    Assignee: Carl-Zeiss-Stiftung
    Inventor: Klaus Knupfer
  • Method of illuminating an object with a focused electron beam and an electron-optical illuminating system therefor
    Patent number: 5483073
    Abstract: The invention is directed to a method for illuminating an object with a focused electron beam as well as to an electron-optical illuminating apparatus therefor. The crossover of an electron source is imaged, greatly demagnified, into the object plane via four imaging stages. The two first condenser stages define a zoom system. The cross section of the crossover image in the input image plane of the third condenser stage can be varied by varying the corresponding lens excitation. The third condenser stage images the crossover image from the input image plane into the input image plane of the objective. A multiple diaphragm is mounted between the third condenser stage and the input image plane of the objective. This multiple diaphragm has several apertures which are, in part, off-axis.
    Type: Grant
    Filed: December 22, 1993
    Date of Patent: January 9, 1996
    Assignee: Carl-Zeiss-Stiftung
    Inventor: Gerd Benner
  • Process and apparatus for the ablation of a surface
    Patent number: 5475197
    Abstract: For defined ablation of a surface, successive partial regions of equal surface area are acted on by a radiation source, preferably a laser, through an optical system. The partial regions are smaller as regards surface area than the whole surface to be processed, so that the respective radiation source can be dimensioned in a less costly manner. Telescope optics with conical surfaces serve as optical systems suitable for this purpose.
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: December 12, 1995
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Walter Wrobel, Theo Lasser, Peter Reimer, Herbert Gross, Willi Ulrich
  • Thin film of gallium oxide and method of producing the film
    Patent number: 5474851
    Abstract: A thin film of gallium oxidized with oxygen is produced by reactive vapor depositing gallium in a vacuum with oxygen followed by tempering. The refractive index (n) lies in the range of 1.2 to 1.3.
    Type: Grant
    Filed: March 7, 1994
    Date of Patent: December 12, 1995
    Assignee: Carl-Zeiss-Stiftung
    Inventor: Bernhard Ganswein
  • Method of measuring elemental shapes of a workpiece on a coordinate measuring machine
    Patent number: 5471406
    Abstract: For rapid measurement of workpieces having elemental shapes of known geometry in any orientation in space, the elemental shapes are scanned on a coordinate measuring machine which is equipped with a measuring probe head having a permissible measurement range (MR). The computer of the measuring machine is programmed with basic data for establishing a predetermined path of probe-scanning contact with the workpiece, the predetermined path being so calculated (1) that the probe ball of the probe will remain in continuous contact with the workpiece surface, (2) that probe-head measurements always occur within the permissible measurement range (MR) of the probe head, and (3) that probe-ball displacements reflect probe-head measurements that are taken as measured corrections of the predetermined path.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: November 28, 1995
    Assignee: Carl Zeiss-Stiftung
    Inventors: Karl-Hermann Breyer, Berndt Kammleiter, Otto Ruck
  • Imaging electron energy filter
    Patent number: 5449914
    Abstract: The invention relates to an electron energy filter for electron microscopes as well as to an electron microscope equipped with such a filter. The filter comprises three sector magnets with the deflection field in the first sector magnet being homogeneous. The deflection field in each of the two other sector magnets is an inhomogeneous gradient field. To generate the gradient field, the pole pieces of the two other sector magnets have the form of segments of truncated double cones. The electron beam passes the first homogeneous sector magnet twice. Multipole elements are arranged in front of, behind and between the three sector magnets. The filter has a large dispersion also for high-energy electrons while at the same time providing a compact configuration. All second-order aberrations and the significant second-rank aberrations are corrected by means of the multiple elements.
    Type: Grant
    Filed: March 25, 1994
    Date of Patent: September 12, 1995
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Harald Rose, Stephan Uhlemann, Eugen Weimer
  • Spectacle lens
    Patent number: 5444503
    Abstract: The invention is directed to a spectacle lens having a multifocal surface and a prescription surface. The prescription surface is a general aspheric surface without point and axis symmetry. Of the individual use conditions, at least the dioptric power is considered within an area when determining the geometry of the prescription surface. The prescription surface is provided exclusively for generating the dioptric power in the reference points and additionally for eliminating the increase of imaging errors.
    Type: Grant
    Filed: March 25, 1993
    Date of Patent: August 22, 1995
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Gerhard Kelch, Hans Lahres, Helmut Wietschorke
  • Method for coordinate measurement of workpieces
    Patent number: 5425180
    Abstract: In the measurement of workpieces on a coordinate measuring machine having a work-contacting probe head of the switching type, the course over time of the contact signal is stored within a time interval which at least spans the procedural time of contact-signal development. After comparison or correlation with a prerecorded sample signal which has also been stored, the exact time of initial contact or the exact scanning coordinates are then subsequently computed.
    Type: Grant
    Filed: February 4, 1993
    Date of Patent: June 20, 1995
    Assignee: Carl-Zeiss-Stiftung
    Inventor: Karl-Hermann Breyer
  • Headgear having a holding device for holding an instrument
    Patent number: 5412811
    Abstract: The invention is directed to a headgear with a holding device for a measuring unit, illuminating unit or viewing unit. The headgear has a headband and a frontal band and is mounted on the head of the wearer of the headgear. A base body is mounted on the frontal band and a bracket for holding the unit is attached to said base body by a clamping device. The clamping device is manually actuable between a fixing position wherein the bracket is movably fixed relative to the base body and a releasing position wherein the bracket is released so as to permit movement of the bracket in elevation relative to the base body. A detent device permits the bracket to be rotated relative to the base body while the clamping device is in the fixing position.
    Type: Grant
    Filed: October 2, 1992
    Date of Patent: May 9, 1995
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Peter Hildenbrand, Walter Matuschek, Heinz Gottlob
  • Unstable laser resonator for generating a stable fundamental mode beam profile
    Patent number: 5406578
    Abstract: The reflecting surfaces within the resonator are minimized in an unstable laser resonator having a radially-dependent output end reflection profile and a passive Q-switch so that the least possible competing resonator geometries can be formed. For this purpose, a saturable absorber foil can be provided as a passive Q-switch element mounted so as to be inclined with respect to the optical axis. Furthermore, it is advantageous to use an output reflector having highly precise parallel boundary surfaces and to align this output reflector with high precision parallel to the end surfaces which delimit the laser medium.
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: April 11, 1995
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Herbert Gross, Harry Bauer, Theo Lasser, Martin Wiechmann
  • Applicator device for laser radiation
    Patent number: 5401270
    Abstract: Applicator device for laser radiation wherein the end of the radiation conducting light-wave conductor faces toward the object to be treated and is mounted in a tube-like sleeve which is closed and transparent at the end for the laser radiation. The end of the sleeve and/or the end of the light-wave conductor are provided with a scattering device which includes a scattering volume. For this purpose, the application of the scattering medium can be adapted to the particular requirement.
    Type: Grant
    Filed: January 24, 1994
    Date of Patent: March 28, 1995
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Gerhard Muller, Christian Zur, Karl-Heinz Schonborn, Jurgen Beuthan, Hubertus C. Bader
  • Catadioptric reduction objective
    Patent number: 5402267
    Abstract: The invention is directed to a catadioptric reduction objective having a concave mirror, a beam splitter and several lens groups but without an additional lens group disposed between the concave mirror and the beam splitter. Catadioptric reduction objectives are disclosed having an image-side aperture of 0.52 and 0.58 for an imaging scale of 1:4 and are corrected for an unrestricted excimer laser for use in submicronlithography.
    Type: Grant
    Filed: November 18, 1993
    Date of Patent: March 28, 1995
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Gerd Furter, Wilhelm Ulrich
  • Coordinate measuring device
    Patent number: 5396712
    Abstract: A manually guided probe of a coordinate measuring device is mounted by two rotary shafts arranged one behind the other and a spring parallelogram for nearly reaction free movement in several spatial directions. The device has a workpiece table that is rotatable and tiltable about at least two shafts.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: March 14, 1995
    Assignee: Carl Zeiss Stiftung
    Inventor: Klaus Herzog
  • Coupling for connecting a surgical microscope to a stand
    Patent number: 5383637
    Abstract: The invention is directed to a coupling for connecting a surgical microscope to a stand. The coupling permits different base positions for the surgical microscope to be set and includes a conical bearing which is held together by a spring packet. An indexing pin of a latching device engages the conical bearing for fixing a selected base position.
    Type: Grant
    Filed: October 7, 1993
    Date of Patent: January 24, 1995
    Assignee: Carl-Zeiss-Stiftung
    Inventor: Klaus Biber