EP2409075A1 - Reflektor, lichtquellenanordnung sowie projektorgerät - Google Patents
Reflektor, lichtquellenanordnung sowie projektorgerätInfo
- Publication number
- EP2409075A1 EP2409075A1 EP10706977A EP10706977A EP2409075A1 EP 2409075 A1 EP2409075 A1 EP 2409075A1 EP 10706977 A EP10706977 A EP 10706977A EP 10706977 A EP10706977 A EP 10706977A EP 2409075 A1 EP2409075 A1 EP 2409075A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reflector
- light source
- source arrangement
- bezier curve
- 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- Withdrawn
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
- 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
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
-
- 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
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2026—Gas discharge type light sources, e.g. arcs
-
- 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
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2066—Reflectors in illumination beam
Definitions
- Reflector light source arrangement and projector device
- the invention relates to a reflector with a reflective surface. It also relates to a light source arrangement in which the reflector according to the invention is used. Finally, it also relates to a projector apparatus having such a light source arrangement.
- Reflectors are always used when a light source emits light undirected or over a solid angle, which is not suitable for the intended purpose.
- reflectors are often produced from a stable base material onto which a reflective layer is applied.
- the reflective layer faces an interior intended for receiving a lamp.
- the shape of conventional reflectors is based on conic sections.
- a section through the reflector shows a conic section.
- the reflector is a rotational body of a conic section. So conventional reflectors z.
- Parabolic reflectors and Ellipsoidreflektoren are advantageously used when the Light must be strongly parallelized (parabolic reflector) or focused (ellipsoidal reflector).
- the etendue is a parameter for an optical system, for example a light source, wherein in the present case a lamp with a reflector located around it is regarded as a total light source. The surface onto which the reflector concentrates the light from the lamp is seen as the emitting surface of the light source. If the solid angle is included, the etendue can be calculated.
- the etendue is a conserved quantity (Lagrangian invariant) in all optical systems. In applications where a certain etendue is given, conical section based reflectors are not completely satisfactory.
- the object of the present invention is to provide a reflector having a reflective surface which is better suited than previous reflectors is, in a light source arrangement with a lamp (discharge lamp, incandescent lamp, based on other physical effects light generator, electrodeless lamp), as z. B. is used in a projector, for a given Etendue the light source arrangement to provide the highest possible light output at given properties of the lamp.
- a lamp discharge lamp, incandescent lamp, based on other physical effects light generator, electrodeless lamp
- the reflector is used in a Lichtquel- len arrangement according to claim 5, and the same is used in a projector apparatus according to claim 10.
- the contour of the reflective surface is traversed by a Bezier curve.
- passing through is meant here that visibly a (straight) section through the reflector shows a Bezier curve, which in particular should be a longitudinal section, ie the Bezier curve should go through the contour along the reflector the light, starting from the lamp, moves toward the exit surface of the light source assembly.
- the contour of the reflective surface is preferably a rotational body of a Bezier curve.
- Bezier curves of a high degree can also be used, but the Bezier curve is preferably a rational quadratic Bezier curve (whose special case is the quadratic Bezier curve).
- a quadratic Bezier curve is defined by three points, called control or Bezier points. If these points are suitably chosen, it will be possible to design an optimal reflector for the desired etendue and the desired arrangement, matching the characteristics of the lamp.
- the distance of the two electrodes normally present in operation is defined as d (for other lamp types d denotes the diameter of a sphere around the light source, from which 63% of the total luminous flux originates)
- the Bezier curve is as follows (in accordance with FIG the general definition of a rational quadratic Bezier curve), if a point on the Bezier curve has the coordinates x (t) and z (t), where t is a curve parameter between 0 and 1:
- xoo it is said to be between 4 and 10 mm, and preferably between 5.5 and 8 mm, if d is given in millimeters.
- x 10 it is between 20 and 42 mm, and preferably between 27 and 34.5 mm
- x 2 o it is between 12 mm and 24 mm, and preferably between 16 mm and 19.5 mm
- the above-mentioned values expressly lead to a non-monotonically increasing Bezier curve, in particular in the preferred embodiment, because x 10 can be greater than X 20 and this is also the preferred values.
- the reflector is therefore bulged in a certain way. It is precisely such an embodiment that has proved to be advantageous, without the specificity of the values specified here being specified.
- the bulge is in accordance with the definition of the factor c preferably after the first third and before the last third of the course of the reflector.
- the light source arrangement according to the invention has a discharge lamp and, as the first reflector, the reflector according to the invention.
- it has a second reflector, which is (preferably) flush with the first reflector.
- the reflectors enclose the discharge lamp.
- the second reflector terminates the light source arrangement on one side, namely on the side which is to be non-exit side for light.
- the object of the second reflector is, in a manner known per se, to reflect back the light emitted by the discharge lamp in one direction, in which it does not strike the first reflector, so that it reaches the first reflector (after reflection).
- This can be achieved by suitable shape and arrangement of the second reflector with respect to the discharge lamp. It can be linked to forms for the so-called back reflector of the prior art. For example, its shape may be part of a spherical shell, for. B. a spherical shell half.
- the light source arrangement may include that at an end remote from the second reflector end of the first reflector an optic is present (that is, at least one optical element), which is followed by a light guide, wherein the optics bundles light and directs it into the light guide.
- an optic that is, at least one optical element
- an optical integrator may be arranged at the open end of the first reflector.
- Such an integrator is known per se from the prior art and z. B. often used in projector devices.
- an application of the light source arrangement is also in a projector device.
- Fig. 2 shows a light source arrangement according to the invention, in which a reflector according to the invention is used, according to a first embodiment
- Fig. 3 shows a light source arrangement according to the invention, in which a reflector according to the invention is used, according to a second embodiment.
- a reflector designated as a whole by 10 is designed as a rotary body, so that it has the appearance illustrated in FIG. 1 for any longitudinal sections that pass through an axis of rotation 12 of the rotary body.
- the reflector has, in a manner known per se, on its inner side, that is, toward the axis of rotation 12. send page, a reflective surface on.
- the contour of the reflector 10 is not different from that of the surface, because the wall of the reflector 10 plays no role in the illustration.
- the rotation axis 12 should be defined as a z-axis, while any direction perpendicular to it is defined as an x-direction.
- the reflector 10 has the task of concentrating light from an extended light source 16 whose luminance centroid is in a plane 14 into an exit plane 18.
- a light beam 20 is shown by way of example.
- the contour of the reflecting surface and thus the inner contour of the reflector 10 in section is exactly a rational quadratic Bezier curve, so that the reflector 10 as a whole has the shape of a body of revolution to a rational square Bezier curve.
- the stated values imply that the location of the largest radius of the reflector 10 does not coincide with the plane 18.
- two partial reflectors can first be produced and then connected to one another, wherein the connection point is the point with the largest radius. Hollow bodies with monotonously increasing radii are particularly easy to produce.
- first light source arrangement 100 which is shown in FIG. 2
- second light source arrangement 110 which is shown in FIG. 3
- another reflector 22 is attached flush to the reflector 10.
- the second reflector 22 has the task of a back reflector. He may have the basic shape of a hemisphere shell. Likewise, it is possible to take into account the shape of the desired discharge lamp 116 used in the design of the back reflector 22: light that arises between the two electrodes, breaks at the transition from the space in which the electrodes are located to the glass and again at the transition from the glass to the outside.
- the back reflector 22 can be appropriately shaped such that precisely light which is emitted by the one electrode tip is used for the purpose other electrode tip is reflected back and vice versa. As a result, the entire space between the two electrodes is imaged on itself.
- Figures 2 and 3 show an example of a light beam 24, which is reflected back from the back reflector.
- the plane 18 is an optical system, symbolized by a lens 26, arranged downstream, and the optics, so the lens 26, an optical waveguide 28 is arranged downstream.
- the lens 26 concentrates the incident light (see light beam 20a) into the optical waveguide 28.
- the reflector 10 according to the invention proves to be particularly advantageous.
- a so-called integrator 30 adjoins the reflector 10 directly.
- This is a body in which light, such as the further guided light beam 20b, is reflected on the inner walls, in such a way that light emerges particularly homogeneously in a plane 32.
- the integrator 30 is funnel-shaped; it should not be rotationally symmetric, but generally has a quadrangular cross-section. Other forms of integrators 30 are conceivable.
- the light source assembly 110 finds favored use in a projector device.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Projection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009013812A DE102009013812A1 (de) | 2009-03-18 | 2009-03-18 | Reflektor, Lichtquellenanordnung sowie Projektorgerät |
PCT/EP2010/052233 WO2010105890A1 (de) | 2009-03-18 | 2010-02-23 | Reflektor, lichtquellenanordnung sowie projektorgerät |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2409075A1 true EP2409075A1 (de) | 2012-01-25 |
Family
ID=42076889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10706977A Withdrawn EP2409075A1 (de) | 2009-03-18 | 2010-02-23 | Reflektor, lichtquellenanordnung sowie projektorgerät |
Country Status (4)
Country | Link |
---|---|
US (1) | US8579474B2 (de) |
EP (1) | EP2409075A1 (de) |
DE (1) | DE102009013812A1 (de) |
WO (1) | WO2010105890A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010055446A1 (en) * | 2008-11-14 | 2010-05-20 | Koninklijke Philips Electronics N. V. | Uv lamp |
DE102009041537A1 (de) | 2009-09-15 | 2011-03-24 | Osram Gesellschaft mit beschränkter Haftung | Stabförmiges optisches Element, insbesondere in Anordnung mit Lichtquelle und Wellenleiter, sowie Verfahren zum Erzeugen eines solchen Elements |
TWI525292B (zh) * | 2013-05-03 | 2016-03-11 | 瑞儀光電股份有限公司 | 可控制光型之導光元件及燈具 |
EP3138131A4 (de) | 2014-05-01 | 2018-01-24 | SEC Optics LLC | Optischer solarvestärker |
JP6615214B2 (ja) * | 2015-10-22 | 2019-12-04 | マクセル株式会社 | 投射型映像表示装置 |
US20190195455A1 (en) * | 2017-12-22 | 2019-06-27 | Industrial Technology Research Institute | Headlight device |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4355350A (en) | 1980-09-02 | 1982-10-19 | Polaroid Corporation | Reflector for use in an artificial lighting device |
ES2021107B3 (es) * | 1987-03-11 | 1991-10-16 | Eastman Kodak Company (A New Jersey Corporation) | Faro de vehiculos y metodo de producir un sistema efectivo opticamente del mismo |
US5037191A (en) | 1989-12-21 | 1991-08-06 | Cheng Dah Y | Orthogonal parabolic reflector systems |
EP0519112B1 (de) | 1991-06-21 | 1996-03-13 | Tetsuhiro Kano | Reflektor und Verfahren zum Erzeugen einer Reflektorform |
JPH07287226A (ja) * | 1994-04-18 | 1995-10-31 | Hitachi Ltd | 液晶表示装置 |
US5661828A (en) | 1995-01-17 | 1997-08-26 | Remote Source Lighting International | Reflector for illumination system |
US5954427A (en) * | 1997-11-05 | 1999-09-21 | Ford Motor Company | Automotive tail lamp with large rake angle |
JP3990523B2 (ja) * | 2000-01-20 | 2007-10-17 | 株式会社小糸製作所 | 反射鏡のための基礎曲面を評価する方法、反射鏡のための基礎曲面を評価する評価システム、および記録媒体 |
DE10053098A1 (de) * | 2000-10-26 | 2002-05-08 | Philips Corp Intellectual Pty | Beleuchtungssystem, insbesondere für Kraftfahrzeuge und Verfahren zur Erzeugung eines Lichtbündels gewünschter Form |
US6547416B2 (en) | 2000-12-21 | 2003-04-15 | Koninklijke Philips Electronics N.V. | Faceted multi-chip package to provide a beam of uniform white light from multiple monochrome LEDs |
JP4431932B2 (ja) | 2001-07-16 | 2010-03-17 | スタンレー電気株式会社 | 灯具 |
JP2004311162A (ja) | 2003-04-04 | 2004-11-04 | Stanley Electric Co Ltd | 照明装置 |
WO2007081812A2 (en) | 2006-01-11 | 2007-07-19 | Philip Premysler | Luminaire reflectors |
JP4121035B2 (ja) | 2006-04-14 | 2008-07-16 | Tdk株式会社 | 磁気抵抗効果素子、薄膜磁気ヘッド、磁気ヘッド装置及び磁気記録再生装置 |
KR20090005194A (ko) * | 2006-04-18 | 2009-01-12 | 라미나 라이팅, 인크. | 피제어 색 혼합용 광 디바이스 |
AU2008205373B2 (en) | 2007-01-10 | 2011-09-15 | Xtreme Energetics, Inc. | Non-imaging facet based optics |
US8333488B2 (en) * | 2007-01-17 | 2012-12-18 | Lighting Science Group Corporation | Optical assembly having primary reflector and secondary reflector |
DE102007045396A1 (de) | 2007-09-21 | 2009-04-23 | Carl Zeiss Smt Ag | Bündelführender optischer Kollektor zur Erfassung der Emission einer Strahlungsquelle |
WO2009064275A1 (en) * | 2007-11-15 | 2009-05-22 | Philips Solid-State Lighting Solutions, Inc. | Led collimator having spline surfaces and related methods |
US20090128921A1 (en) * | 2007-11-15 | 2009-05-21 | Philips Solid-State Lighting Solutions | Led collimator having spline surfaces and related methods |
-
2009
- 2009-03-18 DE DE102009013812A patent/DE102009013812A1/de not_active Withdrawn
-
2010
- 2010-02-23 US US13/147,818 patent/US8579474B2/en not_active Expired - Fee Related
- 2010-02-23 WO PCT/EP2010/052233 patent/WO2010105890A1/de active Application Filing
- 2010-02-23 EP EP10706977A patent/EP2409075A1/de not_active Withdrawn
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2010105890A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2010105890A1 (de) | 2010-09-23 |
US8579474B2 (en) | 2013-11-12 |
DE102009013812A1 (de) | 2010-09-23 |
US20110317430A1 (en) | 2011-12-29 |
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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 |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20110609 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR |
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DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OSRAM AG |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OSRAM GMBH |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OSRAM GMBH |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F21V 7/00 20060101AFI20170216BHEP Ipc: G03B 21/20 20060101ALI20170216BHEP Ipc: F21V 7/04 20060101ALI20170216BHEP |
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GRAP | Despatch of communication of intention to grant a patent |
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INTG | Intention to grant announced |
Effective date: 20170406 |
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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 |
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18D | Application deemed to be withdrawn |
Effective date: 20170817 |