Patents Assigned to Erwin Sick GmbH
  • Mirror collimator having a large aperture ratio
    Patent number: 5298736
    Abstract: A mirror collimator has a larger parabolic mirror (11) and a smaller convexly shaped capture mirror (12) arranged at the concave side of the parabolic mirror and on its optical axis (27). A cut-out 15 is formed at the common focal point of the parabolic mirror (11) and of the capture mirror (12) and a photo-element (16) is arranged in the area of this cut-out (15). The capture mirror (12) is secured to the parabolic mirror (11) by at least one carrying device (17) extending alongside the cut-out (15).
    Type: Grant
    Filed: July 7, 1992
    Date of Patent: March 29, 1994
    Assignee: Erwin Sick GmbH
    Inventors: Hubertus Dreher, Otmar Karle, Hans-Thomas Meinert
  • Rotatable mirror arrangement for generating a scanning beam which is displaced in steps parallel to itself
    Patent number: 4632500
    Abstract: In a rotatable mirror arrangement for generating a scanning beam which is displaced in steps parallel to itself a plurality of plane mirrors (11 to 16) are arranged in a helically displaced arrangement around a body (18) rotatable about an axis of rotation (17). The plane mirrors, which are of the same size are illuminated at an angle .alpha. by a light beam (19). The light beam (19) extends in a plane which contains the scanning beam and which lies parallel to but is displaced from the axis of rotation (17).
    Type: Grant
    Filed: July 6, 1984
    Date of Patent: December 30, 1986
    Assignee: Erwin Sick GmbH
    Inventor: Gunter Fetzer
  • Apparatus for monitoring for faults in translucent strip material
    Patent number: 4310250
    Abstract: Apparatus for monitoring for faults in translucent strip material, such as photographic film, comprises a transport device 16, 12, 13, 22 for continuously moving the film 11 in its longitudinal direction and an optical scanning device 23 including a beam divider 21 which divides a single series of scanned light beams 14 into first and second sets of scanned light beams 14a 14b. The first set of light beams 14a is used to carry out transmission measurements on the film as it passes in tensioned condition between two spaced apart rollers 12, 13 and the second set 14b is used to carry out measurements in reflection as the film passes around the surface of a roller 16. The roller 16 has an air permeable surface and air is blown through this surface from the inside of the roller to form an air cushion between the film and the roller.Faults are detected by the electronic processing circuitry 18 in response to variations in the transmission and reflection measurements carried out by the light detectors 15 and 17.
    Type: Grant
    Filed: February 1, 1980
    Date of Patent: January 12, 1982
    Assignee: Erwin Sick GmbH
    Inventors: Erwin Sick, Klaus Ostertag