Patents by Inventor Dietbert Rudolph

Dietbert Rudolph has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5550887
    Abstract: An X-ray microscope has the following features: a pulsed x-ray source that delivers an intense line radiation, an annular condenser that focuses the radiation of the X-ray source on the object to be investigated, an X-ray optics constructed as a micro zone plate that images the object with high resolution on an X-ray detector, and a phase ring positioned in the rear focal plane of the micro zone plate and applies to the zero order X-ray radiation coming from the object a phase shift, with respect to the higher order radiation deflected by the object structures, which is determined by the thickness and material of the phase ring. The phase shift amounts, for example, to 90.degree. or 270.degree..
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: August 27, 1996
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Gunter Schmal, Dietbert Rudolph
  • Patent number: 5222113
    Abstract: The invention is directed to an X-ray microscope having a pulsed X-ray radiation source which supplies an intensive line radiation such as a plasma focus source. The microscope includes a reflecting condenser which focusses the radiation of the radiation source on the specimen to be investigated and an X-ray optic configured as a zone plate. With the zone plate, the specimen is imaged on an X-ray detector with a high resolution. The above combination of elements makes it possible to free an adequately high amount of X-ray energy at the location of the specimen while providing a high resolution free of image errors so that the required short exposure times are provided for the investigation of living cells.
    Type: Grant
    Filed: August 29, 1991
    Date of Patent: June 22, 1993
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Jurgen Thieme, Bastian Nieman, Gunter Schmahl, Dietbert Rudolph
  • Patent number: 4953188
    Abstract: For producing phase-contrast images with a microscope which scans the object point-by-point with a beam of illuminating radiation, the illuminating radiation is focused by an objective (31, 32) including a phase-shifting element (33) of preselective geometry. A radiation-sensitive detector (36) is positioned directly behind the object plane (34), seen in the direction of the light; and the shape of the radiation-sensitive area of the detector is adapted to encompass the path of the radiation passing through the geometry of the phase-shifting element (33) of the objective (31, 32), e.g., where the phase-shifting elements (33) comprise an annular aperture, an appropriately conforming annular diaphragm (35) is arranged in front of the detector (36). The advantage of this arrangement is that it does not use any radiation-collecting lens system between the object plane (34) and the detector (36).
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: August 28, 1990
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Augustin Siegel, Gunter Schmahl, Dietbert Rudolph
  • Patent number: 4870674
    Abstract: An x-ray microscope in which the object is illuminated coherently or partially coherently via a condenser with quasi-monochromatic x-radiation and is imaged enlarged in the image plane by a high resolution x-ray objective. To obtain the highest possible image contrast, there is arranged in the Fourier plane of the x-ray objective an element which imparts a phase shift to a preselected order of diffraction of the radiation. The element extends over the surface region in the Fourier plane which is acted on here by the diffracted radiation to be influenced. The utilization of the phase shift of a preselected order of diffraction of the radiation as compared with the uninfluenced radiation makes it possible to carry out examinations, in particular of biological structures, with a low dose of radiation and nevertheless to produce a high image contrast.
    Type: Grant
    Filed: December 9, 1987
    Date of Patent: September 26, 1989
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Gunter Schmahl, Dietbert Rudolph