EP0076243A1 - Allseitig wirkender Reflektor - Google Patents
Allseitig wirkender Reflektor Download PDFInfo
- 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- Withdrawn
Links
Images
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)
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 (de) | 1983-04-06 |
Family
ID=20344663
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82850184A Withdrawn EP0076243A1 (de) | 1981-09-30 | 1982-09-16 | Allseitig wirkender Reflektor |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0076243A1 (de) |
SE (1) | SE436070B (de) |
Cited By (5)
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 (de) * | 2013-03-18 | 2014-09-24 | OSRAM GmbH | Reflektor für Beleuchtungsvorrichtung und Beleuchtungsvorrichtung mit dem Reflektor |
DE202015000690U1 (de) * | 2015-01-28 | 2016-05-03 | Bartenbach Holding Gmbh | Leuchte mit polygonalem Strahlungsabriss |
Citations (1)
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 |
-
1981
- 1981-09-30 SE SE8105771A patent/SE436070B/sv unknown
-
1982
- 1982-09-16 EP EP82850184A patent/EP0076243A1/de not_active Withdrawn
Patent Citations (1)
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)
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 (de) * | 2013-03-18 | 2014-09-24 | OSRAM GmbH | Reflektor für Beleuchtungsvorrichtung und Beleuchtungsvorrichtung mit dem Reflektor |
DE202015000690U1 (de) * | 2015-01-28 | 2016-05-03 | Bartenbach Holding Gmbh | Leuchte mit polygonalem Strahlungsabriss |
EP3051204A1 (de) | 2015-01-28 | 2016-08-03 | Bartenbach Holding GmbH | Leuchte mit polygonalem strahlungsabriss |
Also Published As
Publication number | Publication date |
---|---|
SE436070B (sv) | 1984-11-05 |
SE8105771L (sv) | 1983-03-31 |
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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 |