Patents Assigned to Nippon Precision Optical Instrument Co., Ltd.
  • Integration sphere type turbidimeter
    Patent number: 4320978
    Abstract: An integration sphere type turbidimeter having a cylindrical sample cell passing through an integration sphere and an optical system disposed so as to permit a collimated beam of light to be projected into the sample cell from one end to the other end thereof, whereby the diffused rays of light produced by the dispersed particles in the sample liquid are substantially completely picked up by the integration sphere.
    Type: Grant
    Filed: November 20, 1979
    Date of Patent: March 23, 1982
    Assignees: Ko Sato, Nippon Precision Optical Instrument Co., Ltd.
    Inventor: Ko Sato
  • Device for wiping optical window in turbidimeter or similar optical instrument for examining liquid sample
    Patent number: 4165179
    Abstract: Disclosed herein is a device for wiping the optical window of a sample cell in a turbidimeter or other optical instrument for examining a liquid sample, which device comprises a wiper adapted to be inserted into the inner surface of the sample cell and rotated around its axis so as to clean the optical window quickly and easily of defiling matter adhering to the optical window.
    Type: Grant
    Filed: July 13, 1977
    Date of Patent: August 21, 1979
    Assignees: Nippon Precision Optical Instrument Co., Ltd., Nippon S R S, Inc.
    Inventor: Ko Sato