Title:
【発明の名称】光ファイバセンサ
Document Type and Number:
Japanese Patent JP2719017
Kind Code:
B2
Abstract:
PURPOSE:To hold the loss of an optical fiber over a long period of time and to improve a response speed by fixing a stress imparting member at the point of the time when the stress imparting member arrives at the front side in the moving direction from a position where a bending loss is imparted to the optical fiber. CONSTITUTION:An object to be detected is absorbed in a swelling member 4 and the member 4 expands rapidly when the object to be detected enters a case 5 from a detecting hole 6. The stress imparting member 2 is moved upward in this way and the optical fiber 1 is pushed to bend. The object to be detected infilters the inside of the case 5. A receiving member 13 is pushed up by the imparting member 2 via the optical fiber 1 when the swelling member 4 expands further. The pressing force of the imparting member 2 overcomes the outward energizing force of a fixing member 14 and the fixing member 14 is pushed to bend by the holding member 15, by which the receiving member 13 is moved toward the upper part of a space 11. A fixing pawl 16 at the front end of the fixing member 14 is engaged with an engaging recessed part 17 of the imparting member 2. The imparting member 2 is fixed to the receiving member 13 in tight contact therewith in the state of pushing and bending the optical fiber 1 in this way, by which the bending loss of the optical fiber 1 is maintained.
Inventors:
Osamu Kojima
Application Number:
JP33699889A
Publication Date:
February 25, 1998
Filing Date:
December 26, 1989
Export Citation:
Assignee:
Fujikura Ltd.
International Classes:
G01N19/00; G01M3/38; G01N19/10; G02B6/00; G02B6/02; (IPC1-7): G01M3/38; G01N19/00; G02B6/02
Attorney, Agent or Firm:
Masatake Shiga (2 outside)