EP0076243A1 - Réflecteur omnidirectionnel - Google Patents

Réflecteur omnidirectionnel Download PDF

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Publication number
EP0076243A1
EP0076243A1 EP82850184A EP82850184A EP0076243A1 EP 0076243 A1 EP0076243 A1 EP 0076243A1 EP 82850184 A EP82850184 A EP 82850184A EP 82850184 A EP82850184 A EP 82850184A EP 0076243 A1 EP0076243 A1 EP 0076243A1
Authority
EP
European Patent Office
Prior art keywords
reflector
parts
sectors
plane
relative
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Withdrawn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
EP82850184A
Other languages
German (de)
English (en)
Inventor
Bertil Habro
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.)
ROSHAMN INDUSTRI AB
Original Assignee
ROSHAMN INDUSTRI AB
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 ROSHAMN INDUSTRI AB filed Critical ROSHAMN INDUSTRI AB
Publication of EP0076243A1 publication Critical patent/EP0076243A1/fr
Withdrawn legal-status Critical Current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 an omnidirectional reflector especially designed for industrial light fittings, park light fittings and the like.
  • the object of the invention is to avoid reflection back to the lamp and/or to suspension means and/or coupling means necessary for the operation of the lamp, the latter being applicable especially to park light fittings.
  • a reflection back to the lamp or other light fitting details strongly reduces the efficiency of the reflector and can in certain cases also shorten the life of the lamp.
  • the invention is directed to an omnidirectional reflector adapted to embrace as a continuous unit a light source situated in the centre of the reflector, said reflector being characterized in that it is divided along the circumference into at least three parts merging in each other, said reflector following a determined curve in the vertical plane in the central portions of the various parts, that each of the parts consists of two relatively reversed sectors which from said curve are bent in the form of circular arcs in the horizontal plane such that light beams impinging on the sectors adjacent the symmetry plane thereof are reflected outwards from this plane and consequently away from the centre, that light beams impinging on the sectors adjacent the intersection line between the various parts are reflected outwards generally in parallel with the symmetry plane of the sectors, and that intermediate light beams are reflected continuously relative to the angle of incidence towards the sectors, whereby all light is reflected beside the centre of the reflector. Accordingly, the lamp and corresponding central parts will not be exposed to any re-reflection.
  • each part A, B, C and D is to reflect the light at 90° so that it will be 360° in total.
  • each sector A', A" ; B', B" etc. is to reflect the light within 45 0 , as appears from Figs. 9 and 10.
  • the desired light distribution of the reflector in the vertical plane determines the shape of the curve K.
  • the normal position of the reflector is intended but of course the position of the reflector in space can be changed within the scope of the invention.
  • the curve K is calculated out or constructed in a conventional manner. Then the reflector is divided into an arbitrary number of horizontal planes L, M, N, O. Lines R with an angle of 22.5° from the symmetry plane C of the reflector are drawn from the intersection point between each plane and the curve K. In the same manner lines are drawn with the same angle relative to planes being parallel with the symmetry plane C L from the intersection point of each plane with the intersection line between the parts. The common intersection point 8 of the lines in each plane will then constitute the centre for radii of circular arcs which in this way form the surface of the reflector.
  • the sectors are thereby bent in the form of circular arcs in conjunction with the predetermined curve K such that light beams impinging on the sectors ajacent the curve K therebetween are reflected 45° out from the symmetry plane C L of the reflector between the two sectors and consequently away from the centre, while light beams impinging the sectors adjacent the intersection line between the various parts- are reflected out in parallel with the symmetry planes CL. Between these two limits the beams are reflected continuously relative to the angle of incidence towards the sectors. Practically all light is thus reflected beside the centre of the reflector.
  • the actual angle relative to the symmetry planes C L are equal to 90° divided by the number of parts in the reflector. If the reflector has four parts, as in accordance with Figs. 5 and 6, ⁇ will thus be equal to 22.5°. According to Figs. 3 and 4 the reflector has three parts, and here ⁇ will therefore be equal to 30°. According to Figs. 7 and 8 the reflector has five parts, and therefore ⁇ will in this case be equal to 18°. With three parts the total radiation angle will be 2 x 60° a part, and with 5 parts 2 x 36° so that it will always be 360 0 in total.
  • Figs. 11 If it is desired to have an oval light image according to Fig. 11 on the ground, e.g. from a park light fitting, to illuminate e.g. a foot path, then one may allow the angles ⁇ and ⁇ relative to the symmetry plane CL and thus the radii R to vary in the various parts, as appears from Figs. 12 and 13 which show a reflector with four parts.
  • Figs. 14 and 15 the parts A and C are identical and give each a 60° radiation.
  • the sum ⁇ + ⁇ must always be 45° in a reflector consisting of four parts since the angles ⁇ and ⁇ relative to the symmetry plane C L for all the parts in total should be 90°.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP82850184A 1981-09-30 1982-09-16 Réflecteur omnidirectionnel Withdrawn EP0076243A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8105771A SE436070B (sv) 1981-09-30 1981-09-30 Rundstralande reflektor
SE8105771 1981-09-30

Publications (1)

Publication Number Publication Date
EP0076243A1 true EP0076243A1 (fr) 1983-04-06

Family

ID=20344663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82850184A Withdrawn EP0076243A1 (fr) 1981-09-30 1982-09-16 Réflecteur omnidirectionnel

Country Status (2)

Country Link
EP (1) EP0076243A1 (fr)
SE (1) SE436070B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4205069A1 (de) * 1992-02-19 1993-08-26 Swarovski & Co Reflektorsystem fuer einen beleuchtungskoerper
US6280057B1 (en) 1997-12-17 2001-08-28 O'meara James C. Laser lighting system
CN101915392A (zh) * 2010-07-09 2010-12-15 清华大学 出光表面积至少为10mm2的面光源用的反射器
EP2781829A1 (fr) * 2013-03-18 2014-09-24 OSRAM GmbH Réflecteur pour dispositif d'éclairage et dispositif d'éclairage comprenant le réflecteur
DE202015000690U1 (de) * 2015-01-28 2016-05-03 Bartenbach Holding Gmbh Leuchte mit polygonalem Strahlungsabriss

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1222687A (fr) * 1959-01-20 1960-06-13 Anciens Ets Barbier Perfectionnements aux miroirs d'éclairage circulaires

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1222687A (fr) * 1959-01-20 1960-06-13 Anciens Ets Barbier Perfectionnements aux miroirs d'éclairage circulaires

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4205069A1 (de) * 1992-02-19 1993-08-26 Swarovski & Co Reflektorsystem fuer einen beleuchtungskoerper
US6280057B1 (en) 1997-12-17 2001-08-28 O'meara James C. Laser lighting system
CN101915392A (zh) * 2010-07-09 2010-12-15 清华大学 出光表面积至少为10mm2的面光源用的反射器
EP2781829A1 (fr) * 2013-03-18 2014-09-24 OSRAM GmbH Réflecteur pour dispositif d'éclairage et dispositif d'éclairage comprenant le réflecteur
DE202015000690U1 (de) * 2015-01-28 2016-05-03 Bartenbach Holding Gmbh Leuchte mit polygonalem Strahlungsabriss
EP3051204A1 (fr) 2015-01-28 2016-08-03 Bartenbach Holding GmbH Éclairage a dissociation de rayonnement polygonale

Also Published As

Publication number Publication date
SE8105771L (sv) 1983-03-31
SE436070B (sv) 1984-11-05

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Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE DE FR GB IT NL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19831207

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HABRO, BERTIL