GB2075698B - Light filter - Google Patents

Light filter

Info

Publication number
GB2075698B
GB2075698B GB8113039A GB8113039A GB2075698B GB 2075698 B GB2075698 B GB 2075698B GB 8113039 A GB8113039 A GB 8113039A GB 8113039 A GB8113039 A GB 8113039A GB 2075698 B GB2075698 B GB 2075698B
Authority
GB
United Kingdom
Prior art keywords
light filter
filter
light
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
GB8113039A
Other versions
GB2075698A (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.)
Novartis AG
Original Assignee
Ciba Geigy AG
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 Ciba Geigy AG filed Critical Ciba Geigy AG
Priority to GB8113039A priority Critical patent/GB2075698B/en
Publication of GB2075698A publication Critical patent/GB2075698A/en
Application granted granted Critical
Publication of GB2075698B publication Critical patent/GB2075698B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G03B27/727—Optical projection devices wherein the contrast is controlled optically (e.g. uniform exposure, two colour exposure on variable contrast sensitive material)
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
GB8113039A 1980-05-02 1981-04-28 Light filter Expired GB2075698B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8113039A GB2075698B (en) 1980-05-02 1981-04-28 Light filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8014655 1980-05-02
GB8113039A GB2075698B (en) 1980-05-02 1981-04-28 Light filter

Publications (2)

Publication Number Publication Date
GB2075698A GB2075698A (en) 1981-11-18
GB2075698B true GB2075698B (en) 1984-03-07

Family

ID=26275398

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8113039A Expired GB2075698B (en) 1980-05-02 1981-04-28 Light filter

Country Status (1)

Country Link
GB (1) GB2075698B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5126886A (en) * 1989-04-10 1992-06-30 Morpheus Lights, Inc. Scrolling primary color changer
CN104048266B (en) * 2014-05-23 2015-11-04 广州市浩洋电子有限公司 Optical filter and utilize CMY colour mixture assembly and the optical system thereof of this optical filter
EP3940436A1 (en) 2016-02-15 2022-01-19 Leica Instruments (Singapore) Pte. Ltd. Illumination filter system and observation system for a multispectral fluorescence microscope, multispectral fluorescence microscope, and microscopying method
EP3205257B1 (en) 2016-02-15 2022-11-16 Leica Instruments (Singapore) Pte Ltd Illumination filter for an illumination filter system of a surgical multispectral fluorescence microscope having a spatial filter pattern
EP3251578A1 (en) * 2016-05-30 2017-12-06 Leica Instruments (Singapore) Pte. Ltd. Medical device for the observation of a partly fluorescent object, using a filter system with a transmission window

Also Published As

Publication number Publication date
GB2075698A (en) 1981-11-18

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Legal Events

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