CN101626644B - Optical collector used for illumination system and illumination system - Google Patents
Optical collector used for illumination system and illumination system Download PDFInfo
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- CN101626644B CN101626644B CN2008101315520A CN200810131552A CN101626644B CN 101626644 B CN101626644 B CN 101626644B CN 2008101315520 A CN2008101315520 A CN 2008101315520A CN 200810131552 A CN200810131552 A CN 200810131552A CN 101626644 B CN101626644 B CN 101626644B
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Abstract
The invention relates to an optical collector and an illumination system comprising the optical collector. The illumination system also comprises a first optical source set and a second optical source set which are used for providing first light and second light respectively. The optical collector comprises a first optical collection element, a second optical collection element and an optical splitting element. The first light enters the optical collector from the first optical collection element, and is divided into a plurality of classes of light through the optical splitting element, wherein at least one class of light enters the second optical collection element through the optical splitting element, the second light enters the optical collector from the second optical collection element, is reflected by the optical splitting element, and is together emitted from the second optical collection element with at least one class of light along the light main axis of the optical collector. Under the condition that no systematic etendue is increased and the prior design of the optical path is not changed, two optical sources can be combined by the optical collector to improve the brightness and extent of color gamut of the illumination system.
Description
Technical field
This invention is the illuminator that is used for Projection Display about a kind of, more specifically says, is about a kind of blending illumination system and the light collecting device that adopted thereof.
Background technology
Along with scientific and technological fast-developing, information shows that science and technology is with rapid changepl. never-ending changes and improvements, and the application of optical projection system is also more and more universal, so the user is more and more higher to the image quality requirement of optical projection system.Wherein, image brilliance is an important indicator of judging image quality, and image brilliance is subjected to factor affecting such as light-source brightness, collection efficiency, equal optical efficiency, the optical efficiency that continues usually.When the light exhibition amount of optical projection system has limited light quantity, increase brighter and more effective light source is one of solution.Yet the light source of this class often costs an arm and a leg and the life cycle weak point, moreover its volume is bigger mostly, has increased the size of entire system indirectly.
In the optical projection system of high brightness, (Ultra HighPressure Mercury Lamp is UHP) as light source often to use Xe lamp bulb or a plurality of ultrahigh pressure mercury lamp.Yet Xe lamp bulb has shortcomings such as the short and price of luminescent lifetime is more expensive; On the other hand, if with a plurality of ultrahigh pressure mercury lamps as light source, then in the design of system and utilization, can be subjected to the restriction of light exhibition amount (é tendue).In addition,, distribute complete in the spectral region of blue light and green glow and the crest of strong luminous intensity is all arranged with the output of the spectrum of ultrahigh pressure mercury lamp, but at the spectrum output area of the ruddiness imperfect and undercapacity of frequency spectrum that just seems.
Consider down at cost, many now employing ultrahigh pressure mercury lamps and LED or LASER Light Source make up, the ruddiness portions of the spectrum of reinforcement ultrahigh pressure mercury lamp, and form blending illumination system.Compare down with LED, laser has bigger visible spectrum, and has equally long useful life.Therefore if be responsible for the spectrum output of blue light and green range with ultrahigh pressure mercury lamp, the not enough part of red range output is supplied by red laser, thus in the spectrum output of red range, even can provide the ruddiness brightness higher, and generally speaking can reach higher luminous efficiency than Xe lamp bulb.Therefore, by the hybrid light source that ultrahigh pressure mercury lamp and red laser are formed, not only can break through by a plurality of ultra high pressure mercury lamp source to provide brightness limit, also because of the adding of red laser, shows and obtain broader colour gamut.
Figure 1 shows that a known blending illumination system 1, it comprises a ultrahigh pressure mercury lamp 11, two LASER Light Source 12, one first lens arra 13, one second lens arra 14, a panel 15 and two reflecting prisms 16.The light source of blending illumination system 1 is to be mixed by the light that ultrahigh pressure mercury lamp 11 and LASER Light Source 12 are produced.Specifically, 15 of ultrahigh pressure mercury lamp 11 and panels are provided with first lens arra 13 and second lens arra 14, the light that ultrahigh pressure mercury lamp 11 produces is earlier by several lenslets on first lens arra 13, focuses on second lens arra 14 on the corresponding lenslet again.Light by each lenslet on second lens arra 14 then all is folded to and is projeced on the panel 15, and the light that so is distributed in panel 15 just overlaps together.On the other hand, behind the light-ray condensing that LASER Light Source 12 is produced, reflex to by reflecting prism 16 on the lenslet of first lens arra 13, similarly, be projected on the panel 15 by corresponding lenslet on second lens arra 14 again, and and the light that produces of ultrahigh pressure mercury lamp 11 overlap.Though above-mentioned configuration can reach the effect of hybrid light source, yet the disadvantage of this kind illuminator is that ultrahigh pressure mercury lamp 11 has different light exhibition amounts with LASER Light Source 12, that is need give up the light of part, make it can't become effective sunlight, thereby reduced the illumination efficiency of entire system.Moreover the laser that is located at both sides has increased light exhibition amount, also increases volume.
Be illustrated in figure 2 as another known blending illumination system 2, it comprises a ultrahigh pressure mercury lamp 21, a LASER Light Source 22 and a double-colored spectroscope 23.The ruddiness that LASER Light Source 22 is provided is then added in the illumination path of ultrahigh pressure mercury lamp 21 by double-colored spectroscope 23 reflections.The method of this kind mixed light light source can be avoided the different problem of light exhibition amount between the different light source of blending illumination system 1.Yet in order to use this kind hybrid light source, when the initial light path design of system, just need consider to increase and use double-colored spectroscope 23 or other light optical element that continues (Relay Optics), make completed system design lack the elasticity of change.When the desire cover is used for other illuminator and maybe need increases other Different Light, just often need the configuration of the system that redesigns.
In sum, the known blending illumination system configuration that is used for Projection Display, or between different light source, have and do not share the same light the exhibition amount and can't reach higher illumination efficiency, or make system design lack the elasticity of change for the problem that solves different light exhibition amount between Different Light.In view of this, a kind of unglazed exhibition amount problem is provided, is easy to overlap the blending illumination system that is used for existing optical projection system or is easy to increase other light source, industry institute looks forward to the target of reaching jointly for this reason.
Summary of the invention
A purpose of the present invention provides a kind of light collecting device that is used for blending illumination system, make the optical projection system of this blending illumination system of utilization that a plurality of light sources can be provided simultaneously whereby, and avoid that the difference because of light exhibition amount causes the inconsistent situation of each light source utilance between each light source.Moreover, by the particular design of light collecting device, optical projection system can be mixed various light source, provides to have complete spectrum and the suitable light source of light intensity, and need not change original design of existing optical projection system, it can be replaced easily and use illuminator of the present invention.
For achieving the above object, the invention provides a light collecting device and comprise the illuminator of this light collecting device.Illuminator comprises light collecting device, one first light source group and a secondary light source group, and the first light source group and secondary light source group are respectively in order to provide one first light and one second light.It comprises a light main shaft, one first light collecting element, one second light collecting element and a beam splitter light collecting device.First light is after the first end of first light collecting element enters, and beam splitter is suitable can tell multiclass light with first light, and multiclass light has an at least one class light, and at least one class light is fitted penetrable beam splitter, enters second light collecting element; Second light after second light in part of second light collecting element enters, suitable can the reflection from beam splitter, with at least one class light jointly along the light main shaft, penetrate from the light out part of second light collecting element.
For above-mentioned purpose of the present invention, technical characterictic and advantage can be become apparent, below conjunction with figs. is elaborated to preferred embodiment of the present invention, wherein:
Description of drawings
Fig. 1 is known blending illumination system schematic diagram;
Fig. 2 is another known blending illumination system schematic diagram;
Fig. 3 is the illuminator schematic diagram of first embodiment of the invention;
Fig. 4 is the light collecting device schematic diagram of first embodiment of the invention;
Fig. 5 is the exploded perspective schematic diagram of light collecting device of the present invention;
Fig. 6 A is an existing optical projection system configuration schematic diagram that adopts single illuminator;
Fig. 6 B is the schematic diagram that the optical projection system of Fig. 6 A is changed into employing illuminator of the present invention;
Fig. 7 is the illuminator schematic diagram of second embodiment of the invention; And
Fig. 8 is the first light collecting element schematic diagram of second embodiment of the invention.
Embodiment
One embodiment of the invention are illuminators, and its schematic diagram is as shown in Figure 3.Illuminator 3 is to be used for an optical projection system (scheming not shown), and this illuminator 3 has one first light source group 31, a secondary light source group 32 and a light collecting device 4.Wherein, Fig. 4 is the schematic diagram of light collecting device 4.
The first light source group 31 and secondary light source group 32 are suitable so that one first light 311 and one second light 321 to be provided respectively.The first light source group 31 and secondary light source group 32 comprise at least one light source respectively.In present embodiment, the first light source group 31 is ultrahigh pressure mercury lamps 314, and secondary light source group 32 is made up of a laser array pedestal 323 and a plurality of laser cell 324, and wherein the how sub-light 321a that is provided by this laser cell 324 respectively is provided second light 321.It should be noted that light source type, number and the position of the first light source group 31 and secondary light source group 32 are not limited to the above, know this art person and also can spread to other aspect.For example, secondary light source group 32 also can change the single laser cell of employing so that single laser beam to be provided.
See also Fig. 5, it is that adjacency is provided with in regular turn that first light collecting element 41, beam splitter 43, first prism 421 and light converge portion 422, and first prism 421 is to be the measure-alike isoceles triangle cylinder in the left and right sides.Just be a cone for adapting to larger area beam splitter 43, the first light collecting elements 41, and its right side is corresponding with the left side of beam splitter 43 and have identical size, and the left side of first prism 421 also has identical size with beam splitter 43.In addition, light converges portion 422 and also is a cone, and its left side is corresponding with the right side of first prism 421 and have an identical size.Specifically, first light collecting element 41 has one first sectional area 41a, and this first sectional area 41a increases progressively toward the second end 412 from the first end 411 of first light collecting element 41.Light converges portion 422 and has one second sectional area 42a, and the second sectional area 42a successively decreases toward light out part 422a.In present embodiment, first light collecting element 41 converges portion 422 with light and is taper light harvesting post, but not as limit.
In second light collecting element 42, first prism 421 has one first plane of incidence 421b and second plane of incidence 421d, is located at respectively on the first light in part 421a and the second light in part 421c, respectively in order to receive first light 311 and second light 321.Light converges portion 422 and has an exit facet 422b, is located on the light out part 422a, and it is in order to converge and uniform light that this light converges portion 422.Wherein, as previously mentioned, first prism 421 is preferably the isosceles triangle prism, is preferably an equilateral triangle prism, so that second light 321 is advanced with specific light path, reaches maximum light and utilizes benefit.
Light main shaft 44 suitable centers of converging portion 422 simultaneously by first light collecting element 41, beam splitter 43, first prism 421 and light form the main progress path of light.The advancing of light that the first light source group 31 and secondary light source group 32 are produced is described in detail as follows.
First light 311 that the first light source group 31 produces is to advance along light main shaft 44, enter first light collecting element 41 by the first end 411 of first light collecting element 41 after, the second end 412 from first light collecting element 41 marches to beam splitter 43 again.Beam splitter 43 is divided into first kind light 312 and one second class light 313 with first light 311.Wherein, first kind light 312 penetrates beam splitter 43, enters first prism 421 by first plane of incidence 421b, and advances along light main shaft 44 toward light out part 422a, leaves light collecting device 4 from exit facet 422b at last.Wherein, the second class light 313 is to be isolated from first light 311 by beam splitter 43 reflections.What need explanation in addition is that beam splitter 43 also can be divided into multiclass light with first light 311, is not to be limited to tell two class light.
Each sub-light 321a in second light 321 that secondary light source group 32 produces, earlier after concave lens 423c and lens arra 423d are adjusted into consistent parallel incident angle, enter the second prism 423a by the 3rd plane of incidence 423b, then enter in first prism 421, and then advance toward beam splitter 43 by second plane of incidence 421d.Beam splitter 43 is divided into two class light with second light 321, the overwhelming majority is the 3rd a class light 322 from beam splitter 43 reflections, the 3rd class light 322 can advance towards light out part 422a along light main shaft 44 jointly with first kind light 312, and in light converges portion 422, evenly converge with first kind light 312, leave light collecting device 4 by exit facet 422b at last.
In present embodiment, the reflected waveband scope of designed beam splitter 43 is preferably between the 600nm to 630nm, in the hope of utilizing laser cell 324 wavelength band that provides in the LASER Light Source between the 618nm to 621nm fully.The light that just can replace whereby, ultrahigh pressure mercury lamp 314 luminance shortage in the equal red optical band with laser.Therefore laser cell 324 provides and is a ruddiness by the 3rd class light 322 that beam splitter 43 is reflected, and its wavelength band is between 618nm to 621nm.Under the reflection of beam splitter 43, ultrahigh pressure mercury lamp 314 provides and by the second class light 313 that beam splitter 43 is reflected, then is the ruddiness of a wavelength band between 600nm to 630nm.And the first kind light 312 by beam splitter 43 is the coloured light of wave band beyond the second class light 313, for example is blue light, green glow and the wavelength band ruddiness outside 600nm to 630nm etc.In other enforcement aspect, the reflected waveband scope of beam splitter 43 can certainly be between 618nm to 621nm, and so, the wavelength band of the 3rd class light 322 is between 618nm to 621nm, and the second class light 313 is equally between 618nm to 621nm.What need explanation in addition is that in the present embodiment, first light collecting element 41, light converge and do not have air gap (air gap) between portion 422, first prism 421 and the extension 423 4.Implement the air gap also optionally to be set, to cooperate the demand of other light path design in the aspect in other.
Fig. 6 A is the configuration schematic diagram of an existing optical projection system 6, Fig. 6 B then is with the schematic internal view after the optical projection system 6 employing first embodiment of the invention illuminators 3 of Fig. 6 A, can replace the illuminator of other existing optical projection system easily in order to illuminator of the present invention to be described.As shown in Figure 6A, it in the square frame light harvesting post 61 of existing projector, in this existing optical projection system 6, after only this light harvesting post 61 need being replaced into light collecting device 4 of the present invention, can be under the situation that does not change other original light path design, add secondary light source group 32 easily second light 321 to be provided and to finish the integration of light, obtain having the optical projection system 6 ' of hybrid light source, promptly shown in Fig. 6 B.
Figure 7 shows that second embodiment of illuminator of the present invention, the illuminator 7 of present embodiment has one first light source group 71, a secondary light source group 32 and a light collecting device 8, different with first embodiment is that the first light source group 71 of present embodiment comprises a plurality of light sources.
The first light source group 71 comprises the first sub-light source 714a, the second sub-light source 714b, the 3rd sub-light source 714c, and each sub-light source 714a, 714b, 714c are ultrahigh pressure mercury lamps; Implement in the aspect in other, this seed light source also can be LED lamp or other light source.And in this embodiment, secondary light source group 32 is identical with first embodiment, so do not give unnecessary details in addition in this.
For cooperating several sub-light sources 714a, 714b, the 714c of the first light source group 71, first light collecting element 81 of the light collecting device 8 of present embodiment has the light inlet mechanism of respective number.Specifically, as shown in Figure 8, first light collecting element 81 comprises one first cone 813 and one second cone 814.First cone 813 comprises one first pyramidal reflex face 813a, and second cone 814 is adjacent under first cone 813, and second cone 814 comprises one second cone plane of incidence 814a and one second pyramidal reflex face 814b.In this embodiment, be that first light collecting element 81 with first embodiment is divided into two cones up and down, cooperate the number of light source and the profile of location updating cone simultaneously, and the plane of incidence and/or reflecting surface are set accordingly; And in other implemented aspect, the setting of the profile of first light collecting element and the plane of incidence and reflecting surface also can be other pattern, stated bright exceeding more than not.And in this embodiment, second light collecting element 42, beam splitter 43 and a light main shaft 44 are identical with first embodiment, so do not give unnecessary details in addition in this.
The light of the first sub-light source 714a enters first cone 813 by the side of second cone 814, and by after the first pyramidal reflex face 813a reflection, marches to beam splitter 43 along light main shaft 44.The light of the second sub-light source 714b enters second cone 814 by the second cone plane of incidence 814a, then marches to beam splitter 43 along light main shaft 44.The light of the 3rd sub-light source 714c enters by the side of second cone 814, by second pyramidal reflex face 814b reflection, then marches to beam splitter 43 along light main shaft 44.Similarly, the light that each sub-light source 714a, 714b, 714c are produced is divided into first kind light 712 and one second class light 713 by beam splitter 43 equally, first kind light 712 continues to enter second light collecting element, 42, the second class light 713 and then reflects light collecting device 8 by beam splitter 43.
It should be noted that the present invention is not limited to above-mentioned first light source group amplification aspect, being familiar with present technique field person can also replace by other light source assembly.Whereby, illuminator 7 can add a plurality of light sources easily, and makes the brightness of output light source stronger or colour gamut is more wide.
The illuminator that the present invention proposes adopts the light collecting device of particular design, therefore adopts the optical projection system of illuminator of the present invention can be under the situation of using a plurality of light sources, the situation of avoiding between each light source the difference because of light exhibition amount to cause each light source utilization ratio to differ.In addition, by the particular design of light collecting device, optical projection system can be mixed various light source, provides to have complete spectrum and the suitable light source of light intensity, and need not change the original design that has optical projection system now and just can replace use illuminator of the present invention easily.
The foregoing description only is illustrative principle of the present invention and effect thereof, and explains technical characterictic of the present invention, but not is used to limit protection category of the present invention.Any those skilled in the art that scholar all can be under the situation of know-why of the present invention and spirit, can unlabored change or the arrangement of the isotropism scope that all belongs to the present invention and advocated.Therefore, the scope of the present invention should be limited by the application's described later claim scope.
Claims (13)
1. light collecting device that is used for an illuminator, this illuminator comprises one first a light source group and a secondary light source group, and in order to one first light and one second light to be provided, this light collecting device comprises respectively:
One light main shaft;
One first light collecting element has a first end and a relative the second end;
One second light collecting element has one first light in part, a light out part and one second light in part relative with this first light in part, and this second light collecting element comprises:
One first prism has one first plane of incidence and one second plane of incidence, and this first plane of incidence is positioned at this first light in part and this second plane of incidence is positioned at this second light in part, respectively in order to receive this first light and this second light; And
One light converges portion, has an exit facet, this exit facet is positioned at this light out part, and this light portion of converging is that wherein this first light collecting element and this light portion of converging are symmetrical in this first prism setting and are a cone respectively in order to this second light of Hui Ju And homogenizing and this at least one class light; And
One beam splitter is located between this second end and this first light in part;
Wherein, this first light is after this first end of this first light collecting element enters, and this beam splitter is used for this first light is told multiclass light, and this multiclass light has an at least one class light, and this at least one class light penetrates this beam splitter, enters this second light collecting element; This second light after this second light in part of this second light collecting element enters, this beam splitter reflection certainly, with this at least one class light jointly along this light main shaft, this light out part of this second light collecting element penetrates certainly.
2. light collecting device according to claim 1 it is characterized in that this multiclass light has first kind light and one second class light, and this at least one class light is this first kind light; This second light has one the 3rd class light, the 3rd class light after the reflection of this beam splitter, suitable can with this first kind light jointly along this light main shaft, this light out part of this second light collecting element penetrates certainly.
3. light collecting device according to claim 2 is characterized in that this beam splitter is that the reflection of this second class light is told with this first light certainly.
4. light collecting device according to claim 2 is characterized in that this second class light and the 3rd class light are a ruddiness.
5. light collecting device according to claim 1, it is characterized in that this first light collecting element has one first sectional area, this first sectional area is that this second end to this first light collecting element increases progressively from this first end of this first light collecting element, this light portion of converging has one second sectional area, and this second sectional area is that this light out part to this second light collecting element successively decreases from this first light in part of this second light collecting element.
6. light collecting device according to claim 1 is characterized in that this beam splitter is a plated film or a spectroscope.
7. light collecting device according to claim 1 is characterized in that this first prism is an isoceles triangle shape prism.
8. light collecting device according to claim 1 is characterized in that this second light collecting element also comprises an extension, and this extension comprises one second prism, is adjacent to this second plane of incidence, and this second prism has one the 3rd plane of incidence, in order to receive this second light.
9. light collecting device according to claim 8 is characterized in that this extension also comprises a concave lens, with so that this second light is vertically injected the 3rd plane of incidence.
10. light collecting device according to claim 9 is characterized in that this second light comprises a plurality of sub-light.
11. light collecting device according to claim 10 is characterized in that this extension also comprises a lens arra, uses so that these sub-light are concentrated and parallel the 3rd plane of incidence of injecting this second prism separately.
12. an illuminator comprises:
One first light source group is in order to provide one first light;
One secondary light source group is in order to provide one second light; And
One light collecting device as claimed in claim 1 in order to receive this first light and this second light, is told multiclass light with this first light, and this multiclass light has an at least one class light, and this at least one class light of homogenizing and this second light.
13. illuminator according to claim 12 it is characterized in that this multiclass light has first kind light and one second class light, and this at least one class light is this first kind light; This second light has one the 3rd class light, the 3rd class light after the reflection of this beam splitter, with this first kind light jointly along this light main shaft, this light out part of this second light collecting element penetrates certainly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101315520A CN101626644B (en) | 2008-07-11 | 2008-07-11 | Optical collector used for illumination system and illumination system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101315520A CN101626644B (en) | 2008-07-11 | 2008-07-11 | Optical collector used for illumination system and illumination system |
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| CN101626644A CN101626644A (en) | 2010-01-13 |
| CN101626644B true CN101626644B (en) | 2010-12-29 |
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| CN2008101315520A Active CN101626644B (en) | 2008-07-11 | 2008-07-11 | Optical collector used for illumination system and illumination system |
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| CN104280992A (en) * | 2013-07-12 | 2015-01-14 | 台达电子工业股份有限公司 | Projection system and laser light source module suitable for same |
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| GB2222892A (en) * | 1988-09-20 | 1990-03-21 | Pilkington Perkin Elmer Ltd | Optical display apparatus |
| US5379286A (en) * | 1990-07-24 | 1995-01-03 | Canon Kabushiki Kaisha | Optical information recording-reproducing apparatus having a prism |
| WO2004001456A3 (en) * | 2002-06-21 | 2004-04-08 | Wavien Inc | Multiple lamp illumination system |
| CN1226726C (en) * | 2002-05-08 | 2005-11-09 | 提阿克股份有限公司 | Disc devices |
| CN101042225A (en) * | 2003-01-22 | 2007-09-26 | 三洋电机株式会社 | Illuminating device and projection type video display apparatus |
-
2008
- 2008-07-11 CN CN2008101315520A patent/CN101626644B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2222892A (en) * | 1988-09-20 | 1990-03-21 | Pilkington Perkin Elmer Ltd | Optical display apparatus |
| US5379286A (en) * | 1990-07-24 | 1995-01-03 | Canon Kabushiki Kaisha | Optical information recording-reproducing apparatus having a prism |
| CN1226726C (en) * | 2002-05-08 | 2005-11-09 | 提阿克股份有限公司 | Disc devices |
| WO2004001456A3 (en) * | 2002-06-21 | 2004-04-08 | Wavien Inc | Multiple lamp illumination system |
| CN101042225A (en) * | 2003-01-22 | 2007-09-26 | 三洋电机株式会社 | Illuminating device and projection type video display apparatus |
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