JPS6440909A - Light projection device - Google Patents

Light projection device

Info

Publication number
JPS6440909A
JPS6440909A JP62197871A JP19787187A JPS6440909A JP S6440909 A JPS6440909 A JP S6440909A JP 62197871 A JP62197871 A JP 62197871A JP 19787187 A JP19787187 A JP 19787187A JP S6440909 A JPS6440909 A JP S6440909A
Authority
JP
Japan
Prior art keywords
light
level
projection device
low
projection
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
JP62197871A
Other languages
Japanese (ja)
Inventor
Hideyuki Hosoya
Hiroshi Yokosuka
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.)
Fujikura Ltd
Original Assignee
Fujikura 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 Fujikura Ltd filed Critical Fujikura Ltd
Priority to JP62197871A priority Critical patent/JPS6440909A/en
Publication of JPS6440909A publication Critical patent/JPS6440909A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
    • G02B6/4236—Fixing or mounting methods of the aligned elements
    • G02B6/424—Mounting of the optical light guide

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

PURPOSE:To easily detect projection light with an extremely low level by transmitting the projection light freely to an optional position through a condenser lens and an optical waveguide fiber and also installing the detection part of an optical system freely at a distance from a light projection device main body. CONSTITUTION:Even when the projection light 13 emitted by the light projection device main body 10 is low in level, it is entered efficiently into the optical waveguide fiber 16 which has high coupling efficient and a large diameter through the condenser lens and the optical fiber 16, and guided from the other end to a detection part 17. The detection part 17 is installed at the distance from the light projection device main body 10, and even low-level sent light is detected by a photodetector 21 through the operation of its chopper 19. Consequently, even the extremely-low-level projection light is easily handled.
JP62197871A 1987-08-07 1987-08-07 Light projection device Pending JPS6440909A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62197871A JPS6440909A (en) 1987-08-07 1987-08-07 Light projection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62197871A JPS6440909A (en) 1987-08-07 1987-08-07 Light projection device

Publications (1)

Publication Number Publication Date
JPS6440909A true JPS6440909A (en) 1989-02-13

Family

ID=16381711

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62197871A Pending JPS6440909A (en) 1987-08-07 1987-08-07 Light projection device

Country Status (1)

Country Link
JP (1) JPS6440909A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0915356A1 (en) * 1997-10-18 1999-05-12 Deutsche Telekom AG Method and apparatus for extracting of signals out of a glass fibre
JP2016188930A (en) * 2015-03-30 2016-11-04 日本電信電話株式会社 Fiber side light input/output device, and optical axis adjustment method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0915356A1 (en) * 1997-10-18 1999-05-12 Deutsche Telekom AG Method and apparatus for extracting of signals out of a glass fibre
JP2016188930A (en) * 2015-03-30 2016-11-04 日本電信電話株式会社 Fiber side light input/output device, and optical axis adjustment method

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