WO2003048634A1 - Luminaire with counter-reflector and refractor - Google Patents
Luminaire with counter-reflector and refractor Download PDFInfo
- Publication number
- WO2003048634A1 WO2003048634A1 PCT/IB2002/004971 IB0204971W WO03048634A1 WO 2003048634 A1 WO2003048634 A1 WO 2003048634A1 IB 0204971 W IB0204971 W IB 0204971W WO 03048634 A1 WO03048634 A1 WO 03048634A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reflector
- luminaire
- light
- lamp
- counter
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
-
- 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
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
-
- 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
- F21V7/0008—Reflectors for light sources providing for indirect lighting
-
- 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
- F21V7/0025—Combination of two or more reflectors for a single light source
-
- 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
- F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
- F21V11/08—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures
-
- 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
-
- 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
- F21Y2113/00—Combination of light sources
-
- 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
- F21Y2113/00—Combination of light sources
- F21Y2113/10—Combination of light sources of different colours
Definitions
- the invention relates to a luminaire comprising: a concave reflector enclosing a hollow space and having an edge which defines a light emission window; contact means for accommodating at least a first and a second electric lamp; a separating wall which is light-transmitting and light-reflecting to equal degrees, which is perpendicular to the light emission window, which divides the hollow space into chambers, and which acts as a partitioning wall between the first and the second electric lamp to be accommodated.
- Such a luminaire is known from DE-702556.
- the separating wall in the known luminaire is a flat, double-sided mirror in which light-transmitting provisions are made. Since the separating wall is positioned between the first and the second lamp, the hollow space in the known luminaire is divided by this wall into a first chamber for the first lamp and a second chamber for the second lamp.
- the separating wall is mirroring and light-transmitting in equal degrees, i.e. approximately half, i.e. 45 to 55% of the light reflected and transmitted by the separating wall, denoted incident light for short, is reflected, while the other half, i.e. 55 to 45% of this incident light passes through the separating wall.
- a luminaire of the kind described in the opening paragraph in which the above disadvantages are counteracted.
- a luminaire of the kind described in the opening paragraph is characterized in that the luminaire is provided with a counter-reflector, which counter-reflector is positioned opposite the concave reflector at a side of the contact means opposite to the concave reflector.
- Light issuing directly from the luminaire without the presence of a counter-reflector thus positioned results to a comparatively strong degree in the disadvantages of a comparatively high inhomogeneity of the mixed light and/or the unequal luminous fluxes from the chambers.
- the counter-reflector counteracts these disadvantages in that light directly issuing from the lamp is reflected back into the hollow space of the luminaire owing to the reflection against the counter-reflector. At least a portion of the light reflected back by the counter-reflector is directly incident on the separating wall. The light reflected back may possibly be incident on the separating wall via a subsequent reflection against the reflector. The separating wall will thus reflect approximately half of each light beam incident on the separating wall and will transmit approximately half thereof, thus equally dividing the light over the chambers. A better homogeneity is achieved thereby of the mixed light when lamps of different color temperatures are used.
- the separating wall may be provided with transparent portions so as to be partly light-transmitting, or alternatively the separating wall may be provided with openings.
- these openings are arranged as small elongate slots in a direction perpendicular to the light emission window, which slots have a width which is smallest at the area of the lamp, said width increasing in directions away from the lamp and perpendicular to the light emission window.
- the slots have a substantially diabolo shape viewed in a direction perpendicular to the separating wall. It was found that comparatively good results are obtained with such openings as regards the generation of light of equal intensity from the chambers and the equal distribution or mixing of light over the chambers.
- the luminaire is characterized in that each straight line between the edge of the reflector and the lamp is intersected by the counter-reflector.
- the lamps are screened from direct visibility from outside the luminaire by this measure in that light cannot issue from the luminaire directly, i.e. without reflection, but only after being reflected either by the reflector or by the counter-reflector and the reflector. It is achieved thereby that the light has a greater chance of hitting the separating wall, so that a still better homogeneity of mixed light and of luminous fluxes from the chambers is achieved.
- each straight line between the edge of the reflector and the lamp is intersected by the counter-reflector results in a cut-off angle ⁇ for the reflector and a cut-off angle ⁇ for the counter-reflector with respect to each of the relevant lamps in the respective chambers.
- the cut-off angle ⁇ of the reflector here partly overlaps the cut-off angle ⁇ of the counter- reflector for each lamp. This counteracts that light originating from the lamp can issue directly from the luminaire to the exterior without hitting the separating wall. It is alternatively known that even reflectors of comparatively good quality lead to a loss of light, though comparatively small, upon each reflection.
- the luminaire is characterized in that at least the counter-reflector is specularly reflecting.
- the specular reflection of the counter- reflector renders it possible that, given a suitable mutual positioning and shaping of the counter-reflector, the lamp, and the separating wall, all the light from the lamp directly incident on the counter-reflector will subsequently be incident on the separating wall, h other words, the reflected image of the lamp is imaged on the separating wall by the counter- reflector. It is achieved thereby that a greater portion of the light issued by the lamp is incident on the separating wall, whereby an even better homogeneity of mixed light and of luminous fluxes from the chambers is achieved.
- the luminaire is characterized in that light incident on the reflector or the counter-reflector and directly originating from the lamp is reflected on the separating wall. It is achieved by this measure that not only the light directly incident on the separating wall, but all the reflected light will reach the separating wall. The light generated by the lamps will only be capable of issuing from the luminaire through the light emission window to the exterior after being incident on the separating wall at least once, whereby it has been distributed equally over the two chambers.
- the luminaire is characterized in that the reflector is extended by a respective sub-reflector for each chamber. The dimensions and shape of the relevant sub-reflector may be adapted to the lamp in question.
- each chamber has an associated sub-reflector
- a luminaire for low-pressure mercury vapor gas discharge lamps which luminaire is characterized in that the reflectors are positioned on either side of the separating wall, are elongate, and are concave towards one another.
- Low-pressure mercury vapor gas discharge lamps are particularly suitable for being manufactured with different color temperatures, for example with respective color temperatures of 2700 °C and 6500 °C.
- lamps having such different color temperatures in the luminaire according to the invention renders it possible to obtain a homogeneous mixed light from each individual chamber with a color temperature lying in a range from 2700 to 6500 °C, for example 5000 °C, and of equal luminous intensities.
- FIG. 1 is a cross-sectional view of a first embodiment of a luminaire according to the invention
- Fig. 2 is a cross-sectional view of a second embodiment of a luminaire according to the invention.
- Fig. 3 is a luminous intensity diagram relating to the luminaire of Fig. 1 during operation of only a single lamp.
- Fig. 1 shows a luminaire 1 comprising a concave reflector 2 which encloses a hollow space 3 having an edge 4 limiting a light emission window 5.
- the luminaire is provided with contact means 12, shown in broken lines, in which a first 6 and a second electric lamp 7, low-pressure mercury vapor discharge lamps with respective color temperatures of 2700° and 6500° in Fig. 1, are held.
- the luminaire 1 comprises furthermore a separating wall 8 which is light-transmitting and light-reflecting to equal degrees and which is perpendicular to the light emission window.
- the separating wall 8 is a planar mirror provided with slotted openings of substantially diabolo shape which are evenly distributed over the surface of the mirror, so that the mirror is light-transmitting for 50% and reflecting for 50%.
- the separating wall 8 divides the hollow space 3 into a first 9 and a second chamber 10 and acts as a partitioning wall between the first and the second electric lamp.
- the luminaire is further provided with a counter-reflector 11 , which counter- reflector is positioned in the hollow space 3 opposite the concave reflector 2 at a side of the contact means 12 substantially opposed to the concave reflector.
- Sub-reflectors 2a, 2b which are elongate and which define a longitudinal direction of the luminaire, extend the concave reflector 2 in a transverse direction for the respective chambers. Hence, when viewed along lines transversal to the light emission window 5 and along the separating wall 8, the contact means 12 are positioned in between the concave reflector 2 and the counter reflector 11.
- the sub-reflectors 2a, 2b are concave towards one another and are positioned on either side of the separating wall 8, giving the light a comparatively small exit angle at which the light leaves the luminaire.
- Fig. 2 showing a second embodiment of the luminaire according to the invention, each straight line between the edge 4 of the reflector 2 and the lamp 6 is intersected by the counter-reflector 11. This measure results in a cut-off angle ⁇ of the reflector 2 and a cut-off angle ⁇ of the counter-reflector 11 for the first chamber 9 in which the lamp 6 is accommodated.
- Fig. 2 shows that the angles ⁇ and ⁇ have an overlap ⁇ of only a few degrees.
- Fig. 3 is a luminous intensity diagram obtained from the luminaire of Fig. 1 with only one lamp operating.
- the curve A shows the distribution in a plane perpendicular to the longitudinal direction of the luminaire, Al and A2 representing the distribution of the luminous intensity obtained from the first and the second chamber, respectively. It is apparent from Fig. 3 that light of the same intensity and distribution is obtained from the two chambers.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02785743A EP1459009B1 (en) | 2001-12-07 | 2002-11-21 | Luminaire with counter-reflector and refractor |
JP2003549789A JP4213593B2 (en) | 2001-12-07 | 2002-11-21 | Lighting device having reflector and counter reflector |
DE60215973T DE60215973T2 (en) | 2001-12-07 | 2002-11-21 | LAMP WITH COUNTER REFLECTOR AND REFRACTOR |
US10/497,432 US7178943B2 (en) | 2001-12-07 | 2002-11-21 | Luminaire with counter-reflector and refractor |
AU2002351033A AU2002351033A1 (en) | 2001-12-07 | 2002-11-21 | Luminaire with counter-reflector and refractor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01204752 | 2001-12-07 | ||
EP01204752.8 | 2001-12-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003048634A1 true WO2003048634A1 (en) | 2003-06-12 |
Family
ID=8181383
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2002/004971 WO2003048634A1 (en) | 2001-12-07 | 2002-11-21 | Luminaire with counter-reflector and refractor |
Country Status (9)
Country | Link |
---|---|
US (1) | US7178943B2 (en) |
EP (1) | EP1459009B1 (en) |
JP (1) | JP4213593B2 (en) |
CN (1) | CN100416160C (en) |
AT (1) | ATE344905T1 (en) |
AU (1) | AU2002351033A1 (en) |
DE (1) | DE60215973T2 (en) |
ES (1) | ES2274112T3 (en) |
WO (1) | WO2003048634A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1650491A1 (en) * | 2004-10-22 | 2006-04-26 | ERCO Leuchten GmbH | Lighting device for illuminating building surfaces or part of it |
WO2008041185A2 (en) | 2006-10-05 | 2008-04-10 | Koninklijke Philips Electronics N.V. | Lighting device comprising a light tile with variable color temperature |
WO2009150586A1 (en) | 2008-06-10 | 2009-12-17 | Koninklijke Philips Electronics N.V. | Light output device and method |
EP1876386A3 (en) * | 2005-07-04 | 2010-01-06 | Ansorg GmbH | Lighting device |
WO2012004374A1 (en) * | 2010-07-09 | 2012-01-12 | Check It Etc Gmbh | Reflector assembly for generating a homogeneous light beam |
US8113685B2 (en) | 2007-01-24 | 2012-02-14 | Koninklijke Philips Electronics N.V. | Lighting device comprising at least one lamp and at least one OLED |
US9279548B1 (en) | 2014-08-18 | 2016-03-08 | 3M Innovative Properties Company | Light collimating assembly with dual horns |
RU200568U1 (en) * | 2020-07-07 | 2020-10-29 | Николай Андреевич Губкин | LASER LIGHT |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2874424B1 (en) * | 2004-08-17 | 2007-05-11 | Materiel Arboriculture | DEVICE FOR OPTICALLY ANALYZING PRODUCTS SUCH AS INDIRECT LIGHT FRUITS |
US7401943B2 (en) * | 2005-06-07 | 2008-07-22 | Fusion Uv Systems, Inc. | Solid-state light sources for curing and surface modification |
US8576406B1 (en) | 2009-02-25 | 2013-11-05 | Physical Optics Corporation | Luminaire illumination system and method |
US8646941B1 (en) | 2010-06-14 | 2014-02-11 | Humanscale Corporation | Lighting apparatus and method |
ES2515469T3 (en) * | 2010-09-30 | 2014-10-29 | Koninklijke Philips N.V. | Lighting device and luminaire |
US9512977B2 (en) * | 2012-01-26 | 2016-12-06 | Cree, Inc. | Reduced contrast LED lighting system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE702556C (en) * | 1937-06-24 | 1941-02-11 | C A Schaefer K G | Luminaire with two light sources arranged symmetrically to the axis of rotation in a rotating mirror |
DE1189489B (en) * | 1955-03-25 | 1965-03-25 | Siemens Ag | Broad beam street light for two parallel fluorescent lamps |
DE1472541A1 (en) * | 1965-09-29 | 1969-01-23 | Siemens Ag | Elongated luminaire for one or two lamps with a curved gutter mirror |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2556690A (en) * | 1945-09-12 | 1951-06-12 | Edwin F Guth | Lighting fixture for elongated tubular lamps having means to shield the lamps |
DE1189189B (en) * | 1964-02-04 | 1965-03-18 | Licentia Gmbh | Spring suspension of the stator core for electrical machines |
US4755916A (en) * | 1981-07-23 | 1988-07-05 | Collins Dynamics | Combined flood and spot light |
CN2071749U (en) * | 1990-07-12 | 1991-02-20 | 沈阳市灯具一厂 | Light mixed light fixture |
CN2146648Y (en) * | 1993-02-16 | 1993-11-17 | 何毅 | Colour-changing lamps and lanterns |
EP1030997A1 (en) * | 1998-07-23 | 2000-08-30 | Koninklijke Philips Electronics N.V. | Luminaire |
GB2360353B (en) * | 2000-03-18 | 2004-09-01 | Thorpe F W Plc | Lamp assembly |
US6641293B2 (en) * | 2001-10-31 | 2003-11-04 | Visteon Global Technologies, Inc. | Light shield with reflective inner surface |
-
2002
- 2002-11-21 WO PCT/IB2002/004971 patent/WO2003048634A1/en active IP Right Grant
- 2002-11-21 US US10/497,432 patent/US7178943B2/en not_active Expired - Fee Related
- 2002-11-21 ES ES02785743T patent/ES2274112T3/en not_active Expired - Lifetime
- 2002-11-21 DE DE60215973T patent/DE60215973T2/en not_active Expired - Lifetime
- 2002-11-21 EP EP02785743A patent/EP1459009B1/en not_active Expired - Lifetime
- 2002-11-21 JP JP2003549789A patent/JP4213593B2/en not_active Expired - Fee Related
- 2002-11-21 AT AT02785743T patent/ATE344905T1/en active
- 2002-11-21 AU AU2002351033A patent/AU2002351033A1/en not_active Abandoned
- 2002-11-21 CN CNB028244672A patent/CN100416160C/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE702556C (en) * | 1937-06-24 | 1941-02-11 | C A Schaefer K G | Luminaire with two light sources arranged symmetrically to the axis of rotation in a rotating mirror |
DE1189489B (en) * | 1955-03-25 | 1965-03-25 | Siemens Ag | Broad beam street light for two parallel fluorescent lamps |
DE1472541A1 (en) * | 1965-09-29 | 1969-01-23 | Siemens Ag | Elongated luminaire for one or two lamps with a curved gutter mirror |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1650491A1 (en) * | 2004-10-22 | 2006-04-26 | ERCO Leuchten GmbH | Lighting device for illuminating building surfaces or part of it |
EP1876386A3 (en) * | 2005-07-04 | 2010-01-06 | Ansorg GmbH | Lighting device |
WO2008041185A2 (en) | 2006-10-05 | 2008-04-10 | Koninklijke Philips Electronics N.V. | Lighting device comprising a light tile with variable color temperature |
US8113685B2 (en) | 2007-01-24 | 2012-02-14 | Koninklijke Philips Electronics N.V. | Lighting device comprising at least one lamp and at least one OLED |
WO2009150586A1 (en) | 2008-06-10 | 2009-12-17 | Koninklijke Philips Electronics N.V. | Light output device and method |
US8459830B2 (en) | 2008-06-10 | 2013-06-11 | Koninklijke Philips Electronics N.V. | Light output device with partly transparent mirror |
RU2502918C2 (en) * | 2008-06-10 | 2013-12-27 | Конинклейке Филипс Электроникс Н.В. | Light-emitting device and method of light emission |
KR101679061B1 (en) * | 2008-06-10 | 2016-11-24 | 코닌클리케 필립스 엔.브이. | Light output device and method |
WO2012004374A1 (en) * | 2010-07-09 | 2012-01-12 | Check It Etc Gmbh | Reflector assembly for generating a homogeneous light beam |
US9279548B1 (en) | 2014-08-18 | 2016-03-08 | 3M Innovative Properties Company | Light collimating assembly with dual horns |
RU200568U1 (en) * | 2020-07-07 | 2020-10-29 | Николай Андреевич Губкин | LASER LIGHT |
Also Published As
Publication number | Publication date |
---|---|
US7178943B2 (en) | 2007-02-20 |
ATE344905T1 (en) | 2006-11-15 |
DE60215973T2 (en) | 2007-10-18 |
EP1459009B1 (en) | 2006-11-08 |
JP2005512279A (en) | 2005-04-28 |
ES2274112T3 (en) | 2007-05-16 |
AU2002351033A1 (en) | 2003-06-17 |
CN100416160C (en) | 2008-09-03 |
US20050024878A1 (en) | 2005-02-03 |
DE60215973D1 (en) | 2006-12-21 |
JP4213593B2 (en) | 2009-01-21 |
CN1602400A (en) | 2005-03-30 |
EP1459009A1 (en) | 2004-09-22 |
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