GB1489805A - Light equalizer - Google Patents

Light equalizer

Info

Publication number
GB1489805A
GB1489805A GB193876A GB193876A GB1489805A GB 1489805 A GB1489805 A GB 1489805A GB 193876 A GB193876 A GB 193876A GB 193876 A GB193876 A GB 193876A GB 1489805 A GB1489805 A GB 1489805A
Authority
GB
United Kingdom
Prior art keywords
reflective
transmissive
plane
planes
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
GB193876A
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.)
Environmental Research and Technology Inc
ENVIRONMENTAL RES AND Technology
Original Assignee
Environmental Research and Technology Inc
ENVIRONMENTAL RES AND Technology
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
Priority claimed from US458124A external-priority patent/US3887262A/en
Application filed by Environmental Research and Technology Inc, ENVIRONMENTAL RES AND Technology filed Critical Environmental Research and Technology Inc
Publication of GB1489805A publication Critical patent/GB1489805A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/30—Collimators
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G01J3/0208—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using focussing or collimating elements, e.g. lenses or mirrors; performing aberration correction
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0927—Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/0994—Fibers, light pipes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/40—Optical focusing aids
    • 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
    • G02B5/0221—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 an irregular structure
    • 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
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G02B5/24—Liquid filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters

Abstract

1489805 Lighting fittings ENVIRONMENTAL RESEARCH & TECHNOLOGY Inc 21 March 1975 [5 April 1974 (2)] 01938/76 Divided out of 1489804 Heading F4R A light equalizer designed to produce a substantially uniform light intensity across its output aperture 32 irrespective of intensity variations across its input aperture 26 comprises an elongated light-transmissive body 22 divided, in a direction extending between the apertures, into 2<SP>m</SP> transmission channels, where m is a positive integer, the channels having substantially identical transmission characteristics and at least a part of the interface between each pair of adjacent channels being substantially half reflective and half transmissive. The body 22 is divided in half on the plane A-A by a plurality of reflective elements 28, 30, 31 so that for a distance d1 extending inwardly from the input aperture 26 substantially half the plane A-A is reflective and the remainder transmissive whilst for the remainder of the length of the body the plane A-A is entirely reflective. At distance d 1 the two halves of the body are themselves divided in half on respective planes B-B and C-C by reflective elements 34-41 so that for a distance d2 each plane is half-reflective and half-transmissive whilst for the remainder of the length of the body each plane is entirely reflective. Further divisions are made in a similar manner. The reflective elements may consist of metallic foils or deposited coatings and the half-reflective half transmissive regions may consist of a continuous film of a suitable dielectric material. The light transmissive body 22 may be made of glass or a high molecular-weight polymer for use with visible light or an alkali-halide for use with infra-red radiation, the use of self-supporting reflective elements in a vacuum being also contemplated. The external surface of the body, except for the apertures 26, 32, is made reflective. A second body 24 with its reflective planes inclined, preferably at a right angle, to the reflective planes of the body 22 may be connected to the output aperture of the first body. In operation, radiation entering the aperture 26 at an inclination to the planes of division is split by the part-reflective, part transmissive regions so that it is distributed substantially equally between all of the channels. Radiation which enters parallel to the planes is not equalized, so a second equalizer disposed at an angle to the first may be connected to the output aperture of the first equalizer.
GB193876A 1974-04-05 1975-03-21 Light equalizer Expired GB1489805A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US45829374A 1974-04-05 1974-04-05
US458124A US3887262A (en) 1974-04-05 1974-04-05 Light equalizer and method of making same

Publications (1)

Publication Number Publication Date
GB1489805A true GB1489805A (en) 1977-10-26

Family

ID=27038869

Family Applications (3)

Application Number Title Priority Date Filing Date
GB1196975A Expired GB1489804A (en) 1974-04-05 1975-03-21 Light equalizer method and making same and optical system using same
GB193876A Expired GB1489805A (en) 1974-04-05 1975-03-21 Light equalizer
GB193976A Expired GB1489806A (en) 1974-04-05 1975-03-21 Light equalizer

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB1196975A Expired GB1489804A (en) 1974-04-05 1975-03-21 Light equalizer method and making same and optical system using same

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB193976A Expired GB1489806A (en) 1974-04-05 1975-03-21 Light equalizer

Country Status (5)

Country Link
JP (1) JPS50137553A (en)
DE (1) DE2514191A1 (en)
FR (1) FR2274937A1 (en)
GB (3) GB1489804A (en)
NL (1) NL7503848A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2392405A1 (en) * 1976-06-03 1978-12-22 Labo Cent Telecommunicat Communications system optical mixer - has uniform division of input through transparent walled cylinder constructed according to given mathematical relationship
DE2952209C2 (en) * 1979-12-22 1984-03-15 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Arrangement for point-by-point and line-by-line recording of image information
JP2012506119A (en) * 2008-10-16 2012-03-08 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Lighting device configured to mix light from a first light emitting device and a second light emitting device
CN113805404B (en) * 2021-11-17 2022-02-18 滨州学院 Uniform lighting device for line scanning photoelectric imaging

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1642772A (en) * 1923-03-10 1927-09-20 Famous Players Lasky Corp Process of and apparatus for eliminating granular effects in photographic enlargements
US1880414A (en) * 1930-01-03 1932-10-04 Eastman Kodak Co Illuminating system for photographic apparatus
US3202016A (en) * 1962-04-11 1965-08-24 Case Co J I Tractor improvements
US3371978A (en) * 1964-02-12 1968-03-05 North American Aviation Inc Pressure-sensitive optical cell
JPS4421110Y1 (en) * 1966-01-13 1969-09-08
DE1954802B1 (en) * 1969-10-31 1971-03-04 Jenaer Glaswerk Schott & Gen Optical stray light filter and process for its manufacture

Also Published As

Publication number Publication date
FR2274937A1 (en) 1976-01-09
GB1489804A (en) 1977-10-26
FR2274937B1 (en) 1982-03-05
DE2514191A1 (en) 1975-10-16
JPS50137553A (en) 1975-10-31
NL7503848A (en) 1975-10-07
GB1489806A (en) 1977-10-26

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Legal Events

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