CA2075990A1 - Luminance regulation - Google Patents

Luminance regulation

Info

Publication number
CA2075990A1
CA2075990A1 CA002075990A CA2075990A CA2075990A1 CA 2075990 A1 CA2075990 A1 CA 2075990A1 CA 002075990 A CA002075990 A CA 002075990A CA 2075990 A CA2075990 A CA 2075990A CA 2075990 A1 CA2075990 A1 CA 2075990A1
Authority
CA
Canada
Prior art keywords
diaphragm
light
fact
accordance
luminance
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.)
Abandoned
Application number
CA002075990A
Other languages
English (en)
French (fr)
Inventor
Albert Frischknecht
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.)
Volpi AG
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2075990A1 publication Critical patent/CA2075990A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
    • G01J1/22—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using a variable element in the light-path, e.g. filter, polarising means
    • G01J1/24—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using a variable element in the light-path, e.g. filter, polarising means using electric radiation detectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/005—Diaphragms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microscoopes, Condenser (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
CA002075990A 1990-12-18 1991-11-13 Luminance regulation Abandoned CA2075990A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4003/90-0 1990-12-18
CH4003/90A CH681394A5 (enrdf_load_stackoverflow) 1990-12-18 1990-12-18

Publications (1)

Publication Number Publication Date
CA2075990A1 true CA2075990A1 (en) 1992-06-19

Family

ID=4267995

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002075990A Abandoned CA2075990A1 (en) 1990-12-18 1991-11-13 Luminance regulation

Country Status (6)

Country Link
EP (1) EP0529006A1 (enrdf_load_stackoverflow)
JP (1) JPH05504847A (enrdf_load_stackoverflow)
CA (1) CA2075990A1 (enrdf_load_stackoverflow)
CH (1) CH681394A5 (enrdf_load_stackoverflow)
FI (1) FI923632L (enrdf_load_stackoverflow)
WO (1) WO1992011548A1 (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5590954A (en) * 1994-06-15 1997-01-07 Vari-Lite, Inc. Dimmer blade
US5658070A (en) * 1994-10-27 1997-08-19 Alcon Laboratories, Inc. Method of varying luminous intensity of light in an illumination system
DE19510691A1 (de) * 1995-03-14 1996-09-19 Joachim Maass Helligkeitsblende für Bildprojektoren
DE10016361B4 (de) * 2000-04-03 2010-08-26 Leica Microsystems Cms Gmbh Optische Anordnung
JP4590095B2 (ja) * 2000-12-07 2010-12-01 オリンパス株式会社 光源装置
DE10255603A1 (de) * 2002-11-28 2004-06-17 Carl Zeiss Jena Gmbh Projektionsvorrichtung
JP4664129B2 (ja) * 2005-06-17 2011-04-06 浜松ホトニクス株式会社 スポット光源装置
US7671543B2 (en) * 2007-01-23 2010-03-02 Dymax Corporation Light exposure control device and apparatus
US7499624B2 (en) 2007-03-16 2009-03-03 Alcon, Inc. Ophthalmic Endoilluminator with Variable-Wedge Rotating-Disk Beam Attenuator
US7444057B2 (en) 2007-03-16 2008-10-28 Alcon, Inc. Variable-wedge rotating-disk beam attenuator for ophthalmic endoilluminator
JP2016090625A (ja) * 2014-10-30 2016-05-23 ホロニクス・インターナショナル株式会社 樹脂硬化用光源装置
CN111352231B (zh) * 2018-12-24 2021-10-22 上海微电子装备（集团）股份有限公司 一种透过率调整装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE690378C (de) * 1935-06-04 1940-04-24 Paul Gossen Anordnung zur stufenweisen Abschirmung eines strahlenempfindlichen Materials
DE2246270A1 (de) * 1971-09-23 1973-03-29 Ferranti Ltd Vorrichtung zur bildung einer optischen oeffnung mit variabler flaeche
US3975099A (en) * 1975-06-16 1976-08-17 Perkin-Elmer Limited Optical null apparatus
DE2701764A1 (de) * 1977-01-18 1978-07-20 Leitz Ernst Gmbh Lichtflussregler
GB1551519A (en) * 1977-03-31 1979-08-30 English Electric Valve Co Ltd Radiation shutters
DE2745397A1 (de) * 1977-10-08 1979-04-19 Leitz Ernst Gmbh Lichtregler fuer lichtleiterleuchten
EP0075044A1 (de) * 1981-09-19 1983-03-30 Elesta Ag Elektronik Einrichtung zur Lichtreservemessung bei Lichtschranken
DE3339522A1 (de) * 1983-11-02 1985-05-09 Faseroptik Henning GmbH & Co, 8501 Allersberg Stabilisierte kaltlichtquelle
DE8802996U1 (de) * 1988-02-04 1988-06-09 Leica Industrieverwaltung Gmbh, 35578 Wetzlar Regelbare Beleuchtungseinrichtung zur gleichmäßigen Ausleuchtung eines Bildfeldes
US4914556A (en) * 1988-07-26 1990-04-03 Morpheus Lights, Inc. Spectral filter module

Also Published As

Publication number Publication date
WO1992011548A1 (de) 1992-07-09
FI923632A7 (fi) 1992-08-14
JPH05504847A (ja) 1993-07-22
FI923632A0 (fi) 1992-08-14
EP0529006A1 (de) 1993-03-03
CH681394A5 (enrdf_load_stackoverflow) 1993-03-15
FI923632L (fi) 1992-08-14

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Legal Events

Date Code Title Description
FZDE Discontinued
FZDE Discontinued

Effective date: 19950513