GB2094018B - Filter for cameras - Google Patents

Filter for cameras

Info

Publication number
GB2094018B
GB2094018B GB8126624A GB8126624A GB2094018B GB 2094018 B GB2094018 B GB 2094018B GB 8126624 A GB8126624 A GB 8126624A GB 8126624 A GB8126624 A GB 8126624A GB 2094018 B GB2094018 B GB 2094018B
Authority
GB
United Kingdom
Prior art keywords
cameras
filter
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
GB8126624A
Other versions
GB2094018A (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.)
JU CHIN LEE
Original Assignee
JU CHIN LEE
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 JU CHIN LEE filed Critical JU CHIN LEE
Publication of GB2094018A publication Critical patent/GB2094018A/en
Application granted granted Critical
Publication of GB2094018B publication Critical patent/GB2094018B/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
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0231—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having microprismatic or micropyramidal shape
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B11/00—Filters or other obturators specially adapted for photographic purposes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Blocking Light For Cameras (AREA)
GB8126624A 1981-02-27 1981-09-02 Filter for cameras Expired GB2094018B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2736281U JPS57139927U (en) 1981-02-27 1981-02-27

Publications (2)

Publication Number Publication Date
GB2094018A GB2094018A (en) 1982-09-08
GB2094018B true GB2094018B (en) 1984-12-05

Family

ID=12218933

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8126624A Expired GB2094018B (en) 1981-02-27 1981-09-02 Filter for cameras

Country Status (2)

Country Link
JP (1) JPS57139927U (en)
GB (1) GB2094018B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154332A (en) * 1984-01-24 1985-09-04 Robert Kelvin Newton Optical sight
DE10343630B4 (en) * 2003-09-20 2007-11-15 Schott Ag diffuser
JP5337256B2 (en) * 2009-10-30 2013-11-06 富士通フロンテック株式会社 Illumination optical system of imaging device
FR3007534A1 (en) 2013-06-20 2014-12-26 St Microelectronics Crolles 2 PRODUCTION OF A NANOSTRUCTURE SPECTRAL FILTER

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3458348A (en) * 1966-05-31 1969-07-29 Minnesota Mining & Mfg Transparent coated optical element
JPS49119646A (en) * 1973-03-15 1974-11-15
JPS5528023A (en) * 1978-08-18 1980-02-28 Tokyo Megane:Kk Production of covered lens
US4417790A (en) * 1979-05-10 1983-11-29 American Optical Corporation Finished ophthalmic lens comprising an optical smooth coating over a rough-surfaced base
JPS55156030A (en) * 1979-05-25 1980-12-04 Tokyo Megane:Kk Manufacture of coated lens

Also Published As

Publication number Publication date
GB2094018A (en) 1982-09-08
JPS57139927U (en) 1982-09-01

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Legal Events

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

Effective date: 19930902