GB2027925B - Optical filters - Google Patents

Optical filters

Info

Publication number
GB2027925B
GB2027925B GB7835934A GB7835934A GB2027925B GB 2027925 B GB2027925 B GB 2027925B GB 7835934 A GB7835934 A GB 7835934A GB 7835934 A GB7835934 A GB 7835934A GB 2027925 B GB2027925 B GB 2027925B
Authority
GB
United Kingdom
Prior art keywords
optical filters
filters
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.)
Expired
Application number
GB7835934A
Other versions
GB2027925A (en
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB7835934A priority Critical patent/GB2027925B/en
Priority to DE19782848294 priority patent/DE2848294C2/en
Publication of GB2027925A publication Critical patent/GB2027925A/en
Application granted granted Critical
Publication of GB2027925B publication Critical patent/GB2027925B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/113—Anti-reflection coatings using inorganic layer materials only
    • G02B1/115—Multilayers
    • 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)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Optical Filters (AREA)
GB7835934A 1978-08-03 1978-09-07 Optical filters Expired GB2027925B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB7835934A GB2027925B (en) 1978-08-03 1978-09-07 Optical filters
DE19782848294 DE2848294C2 (en) 1978-08-03 1978-11-07 Neutral gray filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7832117 1978-08-03
GB7835934A GB2027925B (en) 1978-08-03 1978-09-07 Optical filters

Publications (2)

Publication Number Publication Date
GB2027925A GB2027925A (en) 1980-02-27
GB2027925B true GB2027925B (en) 1983-01-19

Family

ID=26268436

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7835934A Expired GB2027925B (en) 1978-08-03 1978-09-07 Optical filters

Country Status (2)

Country Link
DE (1) DE2848294C2 (en)
GB (1) GB2027925B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7906203B2 (en) 2005-10-11 2011-03-15 Cardinal Cg Company High infrared reflection coatings

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4501470A (en) * 1981-09-28 1985-02-26 Rockwell International Corporation Christiansen-Bragg optical filter
DD226742A3 (en) * 1983-04-04 1985-08-28 Zeiss Jena Veb Carl INTERFERENCE FILTER WITH A THROUGH BAND
DE3613688A1 (en) * 1986-04-23 1987-10-29 Hewlett Packard Gmbh OPTICAL FILTER
US5270872A (en) * 1989-07-20 1993-12-14 The United States Of America As Represented By The Secretary Of The Air Force Superconducting submicron filter
US4960310A (en) * 1989-08-04 1990-10-02 Optical Corporation Of America Broad band nonreflective neutral density filter
FR2710333B1 (en) * 1993-09-23 1995-11-10 Saint Gobain Vitrage Int Transparent substrate provided with a stack of thin layers acting on solar and / or infrared radiation.
US6076932A (en) * 1996-09-26 2000-06-20 Matsushita Electric Industrial Co., Ltd. Light absorber and optical equipment
DE19718146A1 (en) 1997-04-30 1998-11-05 Leica Mikroskopie & Syst Absorbent thin-film system consisting of metallic and dielectric layers
US7042662B2 (en) * 2002-12-26 2006-05-09 Canon Kabushiki Kaisha Light amount adjusting device, and optical device using the light amount adjusting device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7410470U (en) * 1974-12-12 Agfa Gevaert Ag Neutral gray filter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7906203B2 (en) 2005-10-11 2011-03-15 Cardinal Cg Company High infrared reflection coatings
US8088473B2 (en) 2005-10-11 2012-01-03 Cardinal Cg Company High infrared reflection coatings, thin film coating deposition methods and associated technologies
US8283059B2 (en) 2005-10-11 2012-10-09 Cardinal Cg Company High quality reflectance coatings
US8586215B2 (en) 2005-10-11 2013-11-19 Cardinal Cg Company High quality reflectance coatings
US9376853B2 (en) 2005-10-11 2016-06-28 Cardinal Cg Company High quality reflectance coatings

Also Published As

Publication number Publication date
GB2027925A (en) 1980-02-27
DE2848294C2 (en) 1982-04-08
DE2848294A1 (en) 1980-02-14

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee