GB654175A - An improved optical illumination system - Google Patents

An improved optical illumination system

Info

Publication number
GB654175A
GB654175A GB33743/47A GB3374347A GB654175A GB 654175 A GB654175 A GB 654175A GB 33743/47 A GB33743/47 A GB 33743/47A GB 3374347 A GB3374347 A GB 3374347A GB 654175 A GB654175 A GB 654175A
Authority
GB
United Kingdom
Prior art keywords
screen
lenses
contours
screens
lens
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
GB33743/47A
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.)
Individual
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 GB654175A publication Critical patent/GB654175A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
    • 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
    • F21V5/00—Refractors for light sources

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Liquid Crystal (AREA)

Abstract

654,175. Optical projection systems. GRETENER, E. Dec. 20, 1947, No. 33743. Convention date, April 5, 1946. [Class 97 (i)] An optical system for illuminating an object with a homogeneous distribution of light comprises a light source 11 with an oblong light emitting surface and a concave mirror 13 which directs the light on to a lenticular screen system consisting of lenticular screens 25, 26. These screens are arranged so that each lens of screen 25 forms an image of the source 11 at or near the corresponding lens of screen 26 and so that each lens of screen 26 forms an image of the corresponding lens of screen 25 at the object to be illuminated. In addition, the contours of the lenses of screen 25 are similar to the contours of the object and the contours of the lenses of screen 26 approximately coincide with the contours of the images of the source 11 formed by the lenses of screen 25. The lenses of the screens 25, 26 may be eccentric or prismatic. In a modification, the screen 26 is replaced by two lenticular screens ; in this case, the screen nearer the screen 25 is formed of positive lenses and the other screen is formed of negative lenses and is movable axially to vary the size of the illuminated area of the object.
GB33743/47A 1946-04-05 1947-12-20 An improved optical illumination system Expired GB654175A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH654175X 1946-04-05

Publications (1)

Publication Number Publication Date
GB654175A true GB654175A (en) 1951-06-06

Family

ID=4526373

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33743/47A Expired GB654175A (en) 1946-04-05 1947-12-20 An improved optical illumination system

Country Status (1)

Country Link
GB (1) GB654175A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125983A (en) * 1982-07-02 1984-03-14 Canon Kk Illuminating apparatus
WO2011033414A1 (en) * 2009-09-17 2011-03-24 Koninklijke Philips Electronics N.V. Lighting system with gravity controlled light beam
CN111433638A (en) * 2017-09-28 2020-07-17 弗劳恩霍夫应用研究促进协会 Optical concentrator with diffuser effect

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125983A (en) * 1982-07-02 1984-03-14 Canon Kk Illuminating apparatus
WO2011033414A1 (en) * 2009-09-17 2011-03-24 Koninklijke Philips Electronics N.V. Lighting system with gravity controlled light beam
CN102575833A (en) * 2009-09-17 2012-07-11 皇家飞利浦电子股份有限公司 Lighting system with gravity controlled light beam
RU2525807C2 (en) * 2009-09-17 2014-08-20 Конинклейке Филипс Электроникс Н.В. Lighting system with gravity-controlled light beam
US8870419B2 (en) 2009-09-17 2014-10-28 Koninklijke Philips N.V. Lighting system with gravity controlled light beam
CN111433638A (en) * 2017-09-28 2020-07-17 弗劳恩霍夫应用研究促进协会 Optical concentrator with diffuser effect
US11327325B2 (en) 2017-09-28 2022-05-10 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Optical beam former

Similar Documents

Publication Publication Date Title
ES206424A1 (en) Projection screens
GB654175A (en) An improved optical illumination system
GB719700A (en) Method of and apparatus for testing lenses
GB741246A (en) Improvements in or relating to illuminating devices for optical projection apparatus
GB1266695A (en)
GB1378656A (en) Fundus cameras
GB851404A (en) Improvements in or relating to stereo viewers
GB218763A (en) Improvements in projection apparatus
GB617337A (en) Photographic projection copying apparatus having different magnifications in two perpendicular directions
SU67875A1 (en) Condenser for projection lamp
GB514673A (en) Cinematograph film projection systems
GB1109172A (en) Telescopic direction-finding apparatus
GB829827A (en) Improvements in or relating to self-viewing apparatus
GB514477A (en) Improvements relating to the optical projection of images
GB766776A (en) Improvements in or relating to apparatus for photographic optical projection
GB282078A (en) Improvements relating to optical systems for use in photography
GB692781A (en) Improvements in or relating to stereoscopy
GB626752A (en) Improvements in or relating to an apparatus for optically comparing contours
GB510412A (en) Improvements in or relating to illumination means for optical projection
GB325854A (en) Improvements in or relating to television and like systems and apparatus
GB324479A (en) Optical systems
GB329438A (en) Improvements in or relating to the projection of pictures in natural colours
GB430508A (en) Improvements in or relating to optical copying apparatus
JPS6471285A (en) Projection optical system
GB595405A (en) Apparatus employed for computing illumination