Patents Assigned to Ushio Electric Inc.
  • Patent number: 4068197
    Abstract: An apparatus for stabilizing a laser beam to be used for exposure in an image-reproducing apparatus wherein said beam is suitably controlled by image signals obtained from the scanning of the original beam as modulated. A laser beam, after being suitably modulated by an ultrasonic light modulator, is branched out by a half mirror into two beams, one of which is to be used for exposing a photosensitive material and the other is used as a negative feedback signal. This feedback signal is then added to an image signal so that a linearity between exposing beam and image signals are greatly improved. Further, by improving the linearity of exposing beam, the stability of the exposing beam is simultaneously improved.
    Type: Grant
    Filed: June 23, 1976
    Date of Patent: January 10, 1978
    Assignees: Dainippon Screen Seizo Kabushiki-Kaisha, Ushio Electric Inc.
    Inventors: Taro Yamazaki, Kazuhiko Ohnishi, Kiyoshi Maeda
  • Patent number: 3986018
    Abstract: A light source device including an elongated box-shaped house, a gutter-shaped reflex mirror having a slit at its bottom and an elongated tubular light source positioned in the vicinity of said slit to effectively cool the bulb wall portion of said light source on the downstream side of a cooling flow generated by the cooling means disposed on the back wall of said house.
    Type: Grant
    Filed: October 15, 1975
    Date of Patent: October 12, 1976
    Assignee: Ushio Electric Inc.
    Inventor: Takao Ishii
  • Patent number: 3978361
    Abstract: A light source device having an elongated baffle plate positioned between a light source and a cooling means for regulating a cooling flow from said cooling means. Said baffle plate has a slit and bent portions extending for covering said light source so that the bulb wall of the light source is evenly cooled.
    Type: Grant
    Filed: August 22, 1975
    Date of Patent: August 31, 1976
    Assignee: Ushio Electric Inc.
    Inventor: Tatsumi Hiramoto
  • Patent number: 3956611
    Abstract: A high pressure radiant energy image furnace includes a radiant heat source, such as a Xenon short arc lamp or a halogen incandescent lamp, and an optical system for concentrating the radiant energy from the source on a sample enclosed in a thin wall transparent sample vessel. A closed high pressure vessel resistant to more than 10 atmospheres encloses the heat source as well as the optical system, sample and the sample vessel. A first high pressure gas source communicates with the high pressure vessel and a second high pressure gas source communicates with the sample vessel. The sample in the sample vessel is subjected to a gas pressure of more than 10 atmospheres and the gas pressures in the high pressure vessel and the sample vessel are substantially the same whereby pressure stresses the sample vessel created by differences in internal and external gas pressure are eliminated and the sample safety heated.
    Type: Grant
    Filed: December 17, 1973
    Date of Patent: May 11, 1976
    Assignee: Ushio Electric Inc.
    Inventor: Yoshihiko Nakamura