EP2409075A1 - Reflector, light source arrangement and projector apparatus - Google Patents
Reflector, light source arrangement and projector apparatusInfo
- 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- Withdrawn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 (en) | 2009-03-18 | 2009-03-18 | Reflector, light source arrangement and projector device |
PCT/EP2010/052233 WO2010105890A1 (en) | 2009-03-18 | 2010-02-23 | Reflector, light source arrangement and projector apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2409075A1 true EP2409075A1 (en) | 2012-01-25 |
Family
ID=42076889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10706977A Withdrawn EP2409075A1 (en) | 2009-03-18 | 2010-02-23 | Reflector, light source arrangement and projector apparatus |
Country Status (4)
Country | Link |
---|---|
US (1) | US8579474B2 (en) |
EP (1) | EP2409075A1 (en) |
DE (1) | DE102009013812A1 (en) |
WO (1) | WO2010105890A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2356504A1 (en) * | 2008-11-14 | 2011-08-17 | Koninklijke Philips Electronics N.V. | Uv lamp |
DE102009041537A1 (en) | 2009-09-15 | 2011-03-24 | Osram Gesellschaft mit beschränkter Haftung | Rod-shaped optical element, in particular in arrangement with light source and waveguide, and method for producing such an element |
TWI525292B (en) * | 2013-05-03 | 2016-03-11 | 瑞儀光電股份有限公司 | Light guide element for controlling light shape and lamp |
US11302832B2 (en) | 2014-05-01 | 2022-04-12 | Sec Optics Llc | Optical solar enhancer |
WO2017068676A1 (en) * | 2015-10-22 | 2017-04-27 | 日立マクセル株式会社 | Projection-type video display apparatus |
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 (en) * | 1987-03-11 | 1991-10-16 | Eastman Kodak Company (A New Jersey Corporation) | VEHICLE LIGHTHOUSE AND METHOD OF PRODUCING AN OPTICALLY EFFECTIVE SYSTEM OF THE SAME |
US5037191A (en) | 1989-12-21 | 1991-08-06 | Cheng Dah Y | Orthogonal parabolic reflector systems |
EP0519112B1 (en) | 1991-06-21 | 1996-03-13 | Tetsuhiro Kano | Reflector and method of generating a reflector shape |
JPH07287226A (en) * | 1994-04-18 | 1995-10-31 | Hitachi Ltd | Liquid crystal display device |
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 (en) | 2000-01-20 | 2007-10-17 | 株式会社小糸製作所 | Method for evaluating basic curved surface for reflecting mirror, evaluation system for evaluating basic curved surface for reflecting mirror, and recording medium |
DE10053098A1 (en) * | 2000-10-26 | 2002-05-08 | Philips Corp Intellectual Pty | Lighting system, in particular for motor vehicles and method for generating a light beam of the desired shape |
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 (en) | 2001-07-16 | 2010-03-17 | スタンレー電気株式会社 | Lamp |
JP2004311162A (en) * | 2003-04-04 | 2004-11-04 | Stanley Electric Co Ltd | Lighting device |
WO2007081812A2 (en) | 2006-01-11 | 2007-07-19 | Philip Premysler | Luminaire reflectors |
JP4121035B2 (en) | 2006-04-14 | 2008-07-16 | Tdk株式会社 | Magnetoresistive element, thin film magnetic head, magnetic head device, and magnetic recording / reproducing apparatus |
WO2007121486A2 (en) | 2006-04-18 | 2007-10-25 | Lamina Lighting, Inc. | Optical devices for controlled color mixing |
AU2008205373B2 (en) * | 2007-01-10 | 2011-09-15 | Xtreme Energetics, Inc. | Non-imaging facet based optics |
WO2008089324A2 (en) * | 2007-01-17 | 2008-07-24 | Lighting Science Group Corporation | Folded light path led array collimation optic |
DE102007045396A1 (en) | 2007-09-21 | 2009-04-23 | Carl Zeiss Smt Ag | Bundle-guiding optical collector for detecting the emission of a radiation source |
US20090128921A1 (en) * | 2007-11-15 | 2009-05-21 | Philips Solid-State Lighting Solutions | Led collimator having spline surfaces and related methods |
WO2009064275A1 (en) * | 2007-11-15 | 2009-05-22 | Philips Solid-State Lighting Solutions, Inc. | Led collimator having spline surfaces and related methods |
-
2009
- 2009-03-18 DE DE102009013812A patent/DE102009013812A1/en not_active Withdrawn
-
2010
- 2010-02-23 WO PCT/EP2010/052233 patent/WO2010105890A1/en active Application Filing
- 2010-02-23 EP EP10706977A patent/EP2409075A1/en not_active Withdrawn
- 2010-02-23 US US13/147,818 patent/US8579474B2/en not_active Expired - Fee Related
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2010105890A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20110317430A1 (en) | 2011-12-29 |
WO2010105890A1 (en) | 2010-09-23 |
DE102009013812A1 (en) | 2010-09-23 |
US8579474B2 (en) | 2013-11-12 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
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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 |
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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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18D | Application deemed to be withdrawn |
Effective date: 20170817 |