EP0144576A2 - Flutlichtreflektor - Google Patents

Flutlichtreflektor Download PDF

Info

Publication number
EP0144576A2
EP0144576A2 EP84111087A EP84111087A EP0144576A2 EP 0144576 A2 EP0144576 A2 EP 0144576A2 EP 84111087 A EP84111087 A EP 84111087A EP 84111087 A EP84111087 A EP 84111087A EP 0144576 A2 EP0144576 A2 EP 0144576A2
Authority
EP
European Patent Office
Prior art keywords
reflector
light source
flutes
luminaire arrangement
linear 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.)
Withdrawn
Application number
EP84111087A
Other languages
English (en)
French (fr)
Other versions
EP0144576A3 (de
Inventor
Herbert Arnold Odle
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.)
Johns Manville Corp
Original Assignee
Manville Service Corp
Manville Corp
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 Manville Service Corp, Manville Corp filed Critical Manville Service Corp
Publication of EP0144576A2 publication Critical patent/EP0144576A2/de
Publication of EP0144576A3 publication Critical patent/EP0144576A3/de
Withdrawn legal-status Critical Current

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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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/09—Optical design with a combination of different curvatures

Definitions

  • the present invention relates to a floodlight reflector and mere particularly to a floodlight reflector which provides for the desensitizing of manufacturing imperfections and/or variations.
  • the present invention provides a floodlight reflector and means provided in said reflector for desensitizing the reflector to imperfections encountered in the manufacturing, finishing and light center positioning in the reflector.
  • the reflector includes flutes serving as diffusing elements planes of which are spaced at least 15° from a plane embodying a linear light source.
  • Fig. 2 illustrates a luminaire arrangement embodying a reflector according to the present invention.
  • the arrangement generally designated by a reference numeral 10 includes a suitable socket arrangement 12 adapted to receive a linear light source 14 and a reflector 16.
  • the reflector 16 is provided with a plurality of flutes 18 to provide the lines of control surface change necessary to achieve desensitization of the light from the pencil light source 14.
  • these fluted or otherwise contoured lines of diffusion act as shown in Fig. 1 and the exploded view Fig. 2.
  • a ray from the linear light source such as ray I 1 would normally reflect as ray R 1 .
  • it is necessary for any given point to spread or spray the light over an angular range such as shown in Figs. 1 and 2 as exiting rays R1 through R2 to R3.
  • This angular range is not critial except that the more imperfections encountered in the manufacturing, finishing and light center positioning in the reflector, the greater the angular range between R1 and R3 that is required.
  • the cross-section of the flutes in the reflector can have a variety of geometric shapes including a circular one
  • the flutes are portions of toroids (truncated toroids) each having an elliptical cross section. This is illustrated in Figs. 1 and 2 with the second focal point of the ellipse being at point P.
  • the path of the elliptical elements is extremely critical.
  • the path of the elliptical elements should be exactly parallel to the arc stream of the linear light source, that is the plane including the path of the elliptical elements should also include the linear light source so that the spreading action is exactly in a plane perpendicular to the arc stream of the linear light source.
  • the null lines between the elliptical elements will line up with or be exactly in the plane of the linear light source and this condition will produce a light and dark striation at each null point thereby producing more striations than existed without the diffusing elements.
  • a plane including the path of the diffusing elements must not be capable of containing the linear light source, but rather the plane of the diffusing elements must be at least 15° away from the plane containing the light source.
  • the flutes of the reflector are portions of toroids (truncated toroids) each having an elliptical cross-section.
  • the path of revolution of the toroids is parabolic (following the parabolic sections of the reflector).
  • the flutes 18 are also contiguous, with the planes containing the intersections of the flutes angularly displaced from the plane containing the linear light source by at least 15°.
  • Fig. 4 best illustrates this and shows a piece of cardboard 20 lining up with (and therefore representing a plane including) the path of the diffusing elements. It can be seen from this figure that the plane containing the diffusing element path can only cut through the linear source but could not possibly contain every element of it.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)
EP84111087A 1983-09-16 1984-09-17 Flutlichtreflektor Withdrawn EP0144576A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US53332183A 1983-09-16 1983-09-16
US533321 1983-09-16

Publications (2)

Publication Number Publication Date
EP0144576A2 true EP0144576A2 (de) 1985-06-19
EP0144576A3 EP0144576A3 (de) 1987-06-03

Family

ID=24125451

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111087A Withdrawn EP0144576A3 (de) 1983-09-16 1984-09-17 Flutlichtreflektor

Country Status (3)

Country Link
EP (1) EP0144576A3 (de)
DE (1) DE144576T1 (de)
GB (1) GB2146754A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2313206A (en) * 1996-05-17 1997-11-19 Crowcon Detection Instr Limite Optical component for distributing radiation to foci

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001061A (en) * 1957-09-30 1961-09-19 Esquire Inc Floodlight having segmented reflector
US3662165A (en) * 1970-03-02 1972-05-09 Gen Electric Luminaire reflector
JPS5684805A (en) * 1979-12-11 1981-07-10 Toshiba Electric Equip Illuminator
DE3004422C2 (de) * 1980-02-07 1988-09-29 Sidler Gmbh & Co, 7400 Tuebingen Parabolreflektor
NL186466C (nl) * 1980-07-28 1992-03-16 Philips Nv Verlichtingsarmatuur.
GB2098716B (en) * 1981-05-14 1984-09-12 Forum Inc Luminaire reflector
EP0084934A1 (de) * 1982-01-16 1983-08-03 LUCAS INDUSTRIES public limited company Lampenreflektor
JPS58155701U (ja) * 1982-04-14 1983-10-18 小糸工業株式会社 無影灯用反射鏡
US4453203A (en) * 1982-07-19 1984-06-05 Harvey Hubbell Incorporated Lighting fixture reflector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2313206A (en) * 1996-05-17 1997-11-19 Crowcon Detection Instr Limite Optical component for distributing radiation to foci

Also Published As

Publication number Publication date
DE144576T1 (de) 1985-09-26
GB2146754A (en) 1985-04-24
EP0144576A3 (de) 1987-06-03
GB8423010D0 (en) 1984-10-17

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): BE CH DE FR GB IT LI NL SE

ITCL It: translation for ep claims filed

Representative=s name: BARZANO' E ZANARDO ROMA S.P.A.

EL Fr: translation of claims filed
DET De: translation of patent claims
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Owner name: MANVILLE CORPORATION

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Effective date: 19871204

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Inventor name: ODLE, HERBERT ARNOLD