Patents Assigned to Heraeus Xenotest GmbH
  • Ultraviolet sensor
    Patent number: 5497004
    Abstract: A UV sensor having a photodetector for measurement of UV radiation, an SiO.sub.2 -containing dispersive element disposed ahead of the photodetector in the direction of incident UV radiation and an optional housing having an entry opening for UV radiation. The dispersive element contains quartz glass with interiorly disposed boundary surfaces, the orientations of which are statistically homogeneously distributed.
    Type: Grant
    Filed: November 8, 1994
    Date of Patent: March 5, 1996
    Assignee: Heraeus Xenotest GmbH
    Inventors: Bernd Rudolph, Frank Kellner, Uwe Kroenert
  • Xenon lamp system for materials testing apparatus
    Patent number: 5488267
    Abstract: An illumination system for weathering and fading resistance test instruments is provided with a pulse-driven xenon gas discharge lamp with an elongated discharge bulb that has an electrode spacing in the range from 10 to 50 cm; by adjusting the duty factor of the lamp current by means of an electronic control unit, a predetermined ratio between ultraviolet and infrared radiation is achieved; for the sake of light density, the lamp bulb is bent in a U.
    Type: Grant
    Filed: July 26, 1994
    Date of Patent: January 30, 1996
    Assignee: Heraeus Xenotest GmbH
    Inventors: Bernd Rudolph, Klaus J. Dietz, Klaas Oostlander