JPS5533129A - Light variable attenuator - Google Patents

Light variable attenuator

Info

Publication number
JPS5533129A
JPS5533129A JP10610278A JP10610278A JPS5533129A JP S5533129 A JPS5533129 A JP S5533129A JP 10610278 A JP10610278 A JP 10610278A JP 10610278 A JP10610278 A JP 10610278A JP S5533129 A JPS5533129 A JP S5533129A
Authority
JP
Japan
Prior art keywords
optical fiber
entered
optical
reflecting mirror
reflecting surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10610278A
Other languages
Japanese (ja)
Inventor
Shigefumi Masuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10610278A priority Critical patent/JPS5533129A/en
Publication of JPS5533129A publication Critical patent/JPS5533129A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G23/00—Auxiliary devices for weighing apparatus
    • G01G23/18—Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
    • G01G23/36—Indicating the weight by electrical means, e.g. using photoelectric cells
    • G01G23/37—Indicating the weight by electrical means, e.g. using photoelectric cells involving digital counting

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

PURPOSE:To continuously perform adjustment of the rate of attenuation by providing a curved reflecting mirror turnably about a reflecting surface and so disposing input and output optical fibers that their optical axes cross with the reflecting surface as a center. CONSTITUTION:A curved reflecting mirror 3 is provided turnably about a reflecting surface A and optical fibers 1, 2 of input and output are so disposed and fixed that their optical axes cross at the center A of the reflecting surface. When the reflecting mirror 3 is in the solid line position, the exit light from the optical fiber 1 is reflected by the reflecting mirror 3 and is entered to the optical fiber 2. The light diverged to the optical axis of the optical fiber 1 and entered to the reflecting mirror 3 results in that it is converged and entered to the optical fiber 2 because the reflecting mirror 3 has the reflecting surface of the curved face. Next, when the mirror is turned to the dotted line position, the exit light along the optical axis from the optical fiber 1 is entered to the optical fiber 2 but the diverged light is not entered to the optical fiber 2. Namely, the exit light is attenuated, hence, the rate of attenuation may be made continuously adjustable.
JP10610278A 1978-08-30 1978-08-30 Light variable attenuator Pending JPS5533129A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10610278A JPS5533129A (en) 1978-08-30 1978-08-30 Light variable attenuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10610278A JPS5533129A (en) 1978-08-30 1978-08-30 Light variable attenuator

Publications (1)

Publication Number Publication Date
JPS5533129A true JPS5533129A (en) 1980-03-08

Family

ID=14425142

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10610278A Pending JPS5533129A (en) 1978-08-30 1978-08-30 Light variable attenuator

Country Status (1)

Country Link
JP (1) JPS5533129A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57140015U (en) * 1981-02-26 1982-09-02
US4516827A (en) * 1982-07-16 1985-05-14 The United States Of America As Represented By The Secretary Of The Army Variable optical attenuator
US4544232A (en) * 1981-04-30 1985-10-01 Instruments S.A. Coupling-extracting device for optical signal
US4676584A (en) * 1983-06-22 1987-06-30 Metatech Corporation Fiber optic light coupling assemblies
US6304709B1 (en) 1997-05-07 2001-10-16 Nec Corporation Variable optical attenuator and wavelength-multiplexed optical transmission systems using the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57140015U (en) * 1981-02-26 1982-09-02
US4544232A (en) * 1981-04-30 1985-10-01 Instruments S.A. Coupling-extracting device for optical signal
US4516827A (en) * 1982-07-16 1985-05-14 The United States Of America As Represented By The Secretary Of The Army Variable optical attenuator
US4676584A (en) * 1983-06-22 1987-06-30 Metatech Corporation Fiber optic light coupling assemblies
US6304709B1 (en) 1997-05-07 2001-10-16 Nec Corporation Variable optical attenuator and wavelength-multiplexed optical transmission systems using the same

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