JPS57158606A - Light shielding device - Google Patents

Light shielding device

Info

Publication number
JPS57158606A
JPS57158606A JP4440281A JP4440281A JPS57158606A JP S57158606 A JPS57158606 A JP S57158606A JP 4440281 A JP4440281 A JP 4440281A JP 4440281 A JP4440281 A JP 4440281A JP S57158606 A JPS57158606 A JP S57158606A
Authority
JP
Japan
Prior art keywords
piece
folded
light
danger
laser beam
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
JP4440281A
Other languages
Japanese (ja)
Inventor
Yosuke Furuta
Shoichi Miura
Toshio Ooya
Fumio Mita
Shigeki Mori
Kiyoshi Nawata
Etsugo Yoneda
Nobuo Suzuki
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
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
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, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP4440281A priority Critical patent/JPS57158606A/en
Publication of JPS57158606A publication Critical patent/JPS57158606A/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
    • G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources

Landscapes

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

Abstract

PURPOSE:To prevent the occurrence of danger when an inspection is carried out, by providing a curved tongue piece which is folded toward a light source when a round shaft type object is put ito a light output part and fits to the outer side surface of the inserted object. CONSTITUTION:A light shielding device 1 having a toungue piece 2 is attached to the front face of an inserting hole 11 at a light output part 10 of a laser beam emitting device. A round shaft type inserting object 12 holding an optical fiber 13 at the center part is inerted into the part 10 through an aperture part of a front cover and while the light is shielded. The piece 2 is folded by the pressure of the object 12 to be inserted into the device 1. When the piece 2 is sufficiently inserted, it is folded by 90 deg. completely to fit close the outer surface of the object 12. The piece 2 slides the outer surface of the object 12 to be led into the hole 11 of an optical connector 10. Thus the laser beam, if produced before the insertion of the object 12, is shielded completely. As a result, no direct beam reaches an inspector although he or she observes the inside of the device to eliminate the danger.
JP4440281A 1981-03-26 1981-03-26 Light shielding device Pending JPS57158606A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4440281A JPS57158606A (en) 1981-03-26 1981-03-26 Light shielding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4440281A JPS57158606A (en) 1981-03-26 1981-03-26 Light shielding device

Publications (1)

Publication Number Publication Date
JPS57158606A true JPS57158606A (en) 1982-09-30

Family

ID=12690511

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4440281A Pending JPS57158606A (en) 1981-03-26 1981-03-26 Light shielding device

Country Status (1)

Country Link
JP (1) JPS57158606A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994018586A1 (en) * 1993-02-05 1994-08-18 Siemens Aktiengesellschaft Electro-optical module
DE19525918A1 (en) * 1995-07-04 1997-01-09 Siemens Ag Power control laser monitoring apparatus for optical data transfer - uses delay device to first activate power limiting or switch off locking device when given delay time exceeded
US5708745A (en) * 1994-10-20 1998-01-13 Fujitsu Limited Device for preventing laser beam leakage
US6845210B2 (en) 2001-02-23 2005-01-18 Hosiden Corporation Optical connector with a shutter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5570803A (en) * 1978-11-24 1980-05-28 Nippon Telegr & Teleph Corp <Ntt> Laser hazard preventing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5570803A (en) * 1978-11-24 1980-05-28 Nippon Telegr & Teleph Corp <Ntt> Laser hazard preventing device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994018586A1 (en) * 1993-02-05 1994-08-18 Siemens Aktiengesellschaft Electro-optical module
US5606161A (en) * 1993-02-05 1997-02-25 Siemens Aktiengesellschaft Electro-optical module having a Y-shaped spring element
US5708745A (en) * 1994-10-20 1998-01-13 Fujitsu Limited Device for preventing laser beam leakage
DE19525918A1 (en) * 1995-07-04 1997-01-09 Siemens Ag Power control laser monitoring apparatus for optical data transfer - uses delay device to first activate power limiting or switch off locking device when given delay time exceeded
US6845210B2 (en) 2001-02-23 2005-01-18 Hosiden Corporation Optical connector with a shutter

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