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GB1523331A - Optical interference filter - Google Patents

Optical interference filter

Info

Publication number
GB1523331A
GB1523331A GB934875A GB934875A GB1523331A GB 1523331 A GB1523331 A GB 1523331A GB 934875 A GB934875 A GB 934875A GB 934875 A GB934875 A GB 934875A GB 1523331 A GB1523331 A GB 1523331A
Authority
GB
United Kingdom
Prior art keywords
interference filter
optical interference
germanium
spacers
sheets
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.)
Expired
Application number
GB934875A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB934875A priority Critical patent/GB1523331A/en
Publication of GB1523331A publication Critical patent/GB1523331A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/284—Interference filters of etalon type comprising a resonant cavity other than a thin solid film, e.g. gas, air, solid plates

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1523331 Optical filters STANDARD TELEPHONES & CABLES Ltd 26 Feb 1976 [6 March 1975 ] 9348/75 Heading G2J An optical interference filter comprises a stack of parallel sheets formed of germanium, silicon, zinc sulphide or zinc selenide, each pair of sheets being separated by annular spacers which define cavities each of which contains a fluid of a relatively low refractive index or a vacuum. The spacers are formed by vacuum deposition of germanium or made from gold or silver. Spacer dots may be formed at the centre of each cavity.
GB934875A 1976-02-26 1976-02-26 Optical interference filter Expired GB1523331A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB934875A GB1523331A (en) 1976-02-26 1976-02-26 Optical interference filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB934875A GB1523331A (en) 1976-02-26 1976-02-26 Optical interference filter

Publications (1)

Publication Number Publication Date
GB1523331A true GB1523331A (en) 1978-08-31

Family

ID=9870217

Family Applications (1)

Application Number Title Priority Date Filing Date
GB934875A Expired GB1523331A (en) 1976-02-26 1976-02-26 Optical interference filter

Country Status (1)

Country Link
GB (1) GB1523331A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992016875A2 (en) * 1991-03-20 1992-10-01 Costich Verne R Infrared filter
US6173001B1 (en) 1998-02-18 2001-01-09 Massachusetts Institute Of Technology Output couplers for lasers
CN103698830A (en) * 2013-11-29 2014-04-02 杭州麦乐克电子科技有限公司 Temperature measuring light filter with initial passing wavelength of 5700 nm
CN104009382A (en) * 2013-02-22 2014-08-27 福州高意通讯有限公司 Optical structure

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992016875A2 (en) * 1991-03-20 1992-10-01 Costich Verne R Infrared filter
WO1992016875A3 (en) * 1991-03-20 1992-10-29 Verne R Costich Infrared filter
US5233464A (en) * 1991-03-20 1993-08-03 Costich Verne R Multilayer infrared filter
US5426532A (en) * 1991-03-20 1995-06-20 Costich; Verne R. Infrared filter
US6173001B1 (en) 1998-02-18 2001-01-09 Massachusetts Institute Of Technology Output couplers for lasers
US6351484B1 (en) 1998-02-18 2002-02-26 Massachusetts Institute Of Technology Output couplers for lasers
CN104009382A (en) * 2013-02-22 2014-08-27 福州高意通讯有限公司 Optical structure
CN103698830A (en) * 2013-11-29 2014-04-02 杭州麦乐克电子科技有限公司 Temperature measuring light filter with initial passing wavelength of 5700 nm
CN103698830B (en) * 2013-11-29 2016-02-10 杭州麦乐克电子科技有限公司 The initial thermometric optical filter by wavelength 5700nm

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee