DE3886261T2 - Beleuchtungseinrichtung für rechtwinkligen Lichtaustritt. - Google Patents

Beleuchtungseinrichtung für rechtwinkligen Lichtaustritt.

Info

Publication number
DE3886261T2
DE3886261T2 DE3886261T DE3886261T DE3886261T2 DE 3886261 T2 DE3886261 T2 DE 3886261T2 DE 3886261 T DE3886261 T DE 3886261T DE 3886261 T DE3886261 T DE 3886261T DE 3886261 T2 DE3886261 T2 DE 3886261T2
Authority
DE
Germany
Prior art keywords
light emission
illumination device
angled light
angled
illumination
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 - Lifetime
Application number
DE3886261T
Other languages
English (en)
Other versions
DE3886261D1 (de
Inventor
John F Dreyer
Neal T C O Minnesota Mi Strand
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=21986959&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3886261(T2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of DE3886261D1 publication Critical patent/DE3886261D1/de
Application granted granted Critical
Publication of DE3886261T2 publication Critical patent/DE3886261T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • 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
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • F21V5/005—Refractors for light sources using microoptical elements for redirecting or diffusing light using microprisms
    • 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
DE3886261T 1987-05-26 1988-05-25 Beleuchtungseinrichtung für rechtwinkligen Lichtaustritt. Expired - Lifetime DE3886261T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/053,848 US4791540A (en) 1987-05-26 1987-05-26 Light fixture providing normalized output

Publications (2)

Publication Number Publication Date
DE3886261D1 DE3886261D1 (de) 1994-01-27
DE3886261T2 true DE3886261T2 (de) 1994-07-21

Family

ID=21986959

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3886261T Expired - Lifetime DE3886261T2 (de) 1987-05-26 1988-05-25 Beleuchtungseinrichtung für rechtwinkligen Lichtaustritt.

Country Status (8)

Country Link
US (1) US4791540A (de)
EP (1) EP0293182B1 (de)
JP (1) JP2723251B2 (de)
KR (1) KR0127478B1 (de)
AU (1) AU612652B2 (de)
CA (1) CA1316161C (de)
DE (1) DE3886261T2 (de)
ES (1) ES2047031T3 (de)

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Also Published As

Publication number Publication date
US4791540A (en) 1988-12-13
CA1316161C (en) 1993-04-13
JPS63318003A (ja) 1988-12-26
JP2723251B2 (ja) 1998-03-09
DE3886261D1 (de) 1994-01-27
AU612652B2 (en) 1991-07-18
AU1659188A (en) 1988-12-01
KR0127478B1 (ko) 1998-04-01
EP0293182A2 (de) 1988-11-30
KR880014306A (ko) 1988-12-23
ES2047031T3 (es) 1994-02-16
EP0293182A3 (en) 1989-07-19
EP0293182B1 (de) 1993-12-15

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