AU531891B2 - Optical attenuator - Google Patents

Optical attenuator

Info

Publication number
AU531891B2
AU531891B2 AU69367/81A AU6936781A AU531891B2 AU 531891 B2 AU531891 B2 AU 531891B2 AU 69367/81 A AU69367/81 A AU 69367/81A AU 6936781 A AU6936781 A AU 6936781A AU 531891 B2 AU531891 B2 AU 531891B2
Authority
AU
Australia
Prior art keywords
optical attenuator
attenuator
optical
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.)
Ceased
Application number
AU69367/81A
Other versions
AU6936781A (en
Inventor
Evan Stuart Cameron
John Mcleod
John Campbell Parker
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Publication of AU6936781A publication Critical patent/AU6936781A/en
Application granted granted Critical
Publication of AU531891B2 publication Critical patent/AU531891B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/02—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/205—Neutral density filters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
AU69367/81A 1980-04-18 1981-04-10 Optical attenuator Ceased AU531891B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8012914 1980-04-18
GB8012914A GB2074339B (en) 1980-04-18 1980-04-18 Optical attenuator

Publications (2)

Publication Number Publication Date
AU6936781A AU6936781A (en) 1981-10-22
AU531891B2 true AU531891B2 (en) 1983-09-08

Family

ID=10512879

Family Applications (1)

Application Number Title Priority Date Filing Date
AU69367/81A Ceased AU531891B2 (en) 1980-04-18 1981-04-10 Optical attenuator

Country Status (6)

Country Link
JP (1) JPS56164303A (en)
AU (1) AU531891B2 (en)
DE (1) DE3113840A1 (en)
FR (1) FR2480949A1 (en)
GB (1) GB2074339B (en)
SE (1) SE8102249L (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4682214A (en) * 1982-03-29 1987-07-21 Fuji Photo Optical Co., Ltd. Test pattern projector for a color television camera
EP0374565B1 (en) * 1988-12-22 1993-06-16 Oerlikon-Contraves AG Graded filter
US5210657A (en) * 1991-02-15 1993-05-11 Anritsu Corporation Optical attenuator apparatus without steep level variation
EP0694173A1 (en) * 1992-01-02 1996-01-31 Adc Telecommunications, Inc. Overlapping fusion attenuator
US5319733A (en) * 1992-01-02 1994-06-07 Adc Telecommunications, Inc. Variable fiber optical attenuator
DE69204984T2 (en) * 1992-02-25 1996-02-08 Hewlett Packard Gmbh Optical attenuator.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE633060C (en) * 1931-09-25 1936-07-18 Carl Krug Dr Ing Double prism
CA1000085A (en) * 1971-12-13 1976-11-23 Richard A. Mecklenborg Focusing roll and displacement prisms

Also Published As

Publication number Publication date
JPS56164303A (en) 1981-12-17
SE8102249L (en) 1981-10-19
GB2074339B (en) 1984-01-18
GB2074339A (en) 1981-10-28
AU6936781A (en) 1981-10-22
DE3113840A1 (en) 1982-04-22
FR2480949A1 (en) 1981-10-23

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