CN102331628A - Optical system capable of enhancing polarization in light ray and light source system with same - Google Patents
Optical system capable of enhancing polarization in light ray and light source system with same Download PDFInfo
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- CN102331628A CN102331628A CN2010102257587A CN201010225758A CN102331628A CN 102331628 A CN102331628 A CN 102331628A CN 2010102257587 A CN2010102257587 A CN 2010102257587A CN 201010225758 A CN201010225758 A CN 201010225758A CN 102331628 A CN102331628 A CN 102331628A
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Abstract
The invention relates to an optical system capable of enhancing a certain polarization in a light ray. The optical system comprises a polarization light splitter and a polarization converter, wherein the polarization light splitter is used for splitting an input light ray into a first light ray and a second light ray, the first light ray is provided with a first polarization modality, the second light ray is provided with a second polarization modality, and the first polarization modality is different from the second polarization modality; the polarization converter is used for inputting the second light ray and converting the polarization modality of the second light ray so as to output a third light ray, and the third light ray is provided with more first polarization modalities; and the polarization converter can be used for providing total reflection or high reflection, and at least comprises an anisotropic optical film between an incident medium with a high refractive index and a medium with a low refractive index.
Description
Technical field
The present invention relates to strengthen the optical system of a certain polar biased attitude in the light and light-source system with this system.
Background technology
Along with the arriving of information-technology age, the demand of various electron optics displays (like the projection type liquid crystal display) constantly increases.At such display, possibly need external light source to assist display image.Along with the increase of high quality displayer demand, the service efficiency that adds intense light source is also day by day important.On the method that tradition is raised the efficiency; It is the linear polar biased light beam that becomes the non-polarization Beam Transformation single polar biased attitude; For example; No. the 5122895th, United States Patent (USP) discloses, utilize the polar biased converter at random polar biased light convert linear polar biased light to, wherein disclosed the conventional converters of a so-called P-S polar biased converter.This P type polar biased refers to that only the electric field orientation of oscillation of this light component is parallel to the incident light plane.And the electric field orientation of oscillation that this S type polar biased only refers to this light component is perpendicular to the incident light plane.
Generally speaking, in LCD or optical projection system, traditional polar biased flat board sponges unwanted polar biased light usually from incident non-polarization light, and with the polar biased light that needing to obtain, the light extraction efficiency of traditional polar biased sheet can only reach 50% at most.If be used as the specific polar biased light of generation with polar biased optical splitter collocation polar biased converter, way before, except conversion efficiency was not good, the structure of traditional P-S polar biased converter was complicated, and common related production cost is higher relatively.In addition, in conjunction with the display of this prior art tradition polar biased converter, its power consumption is quite high.
In addition; Utilized the interference technique of film to come different wave length, incident angle and polar biased attitude are done the modulation on intensity and the phase place, to meet the demand of various optical modules in the past; Anti-reflective film for example; Highly reflecting films, spectroscope and bandpass filter are consistent yet above-mentioned various assembly all is subject to incident light with catoptrical polar biased attitude.
To the problems referred to above; The application provides a kind of optical system that strengthens a certain polar biased attitude in the light; It is simple non-all to the film system that it utilizes the method for film to do, and produces strong polar biased conversion, and collocation polar biased spectroscope; Not only can promote the polar biased conversion efficiency, also can design to the requirement that strengthens a certain polar biased attitude in the light.
Summary of the invention
The purpose of this invention is to provide a kind of optical system that strengthens a certain polar biased attitude in the light.
Above-mentioned purpose of the present invention adopts one to combine the system of polar biased spectroscope and polar biased transformational structure to reach.
In detail; The present invention is a kind of optical system that strengthens a certain polar biased attitude in the light; Comprise: a polar biased spectroscope, be used for an input light is separated into one first light and one second light, this first light has one first polar biased mode; This second light has one second polar biased mode, and this first polar biased mode is different from this second polar biased mode; One polar biased converter; Import this second light; Supply conversion polarization mode and export one the 3rd light, the 3rd light has significantly this more first polar biased mode, and wherein the polar biased converter provides total reflection or high reflection; This polar biased converter comprises non-equal tropism's optical thin film at least, between a medium of incident medium of high index of refraction and low-refraction.
Wherein, According to an embodiment; This polar biased spectroscope is a gummed spectroscope; And this gummed spectroscope comprises the optical thin film storehouse that presss from both sides multilayer high refractive index film and low refractive index film between two triangular prisms alternately, and making this multilayer film storehouse is high reflex to the S polar biased light of incident, and this multilayer film storehouse is high transmission effect to P polar biased light.
In addition; According to an embodiment; This polar biased converter comprises a prism; Be coated with on the light reflecting surface of this prism first all to film (isotropic)/non-equal tropism's film (anisotropic)/second all to (isotropic) film, converted the part conversion into or be substantial conversion fully and it carries out.
According to an embodiment, wherein this optical system further comprises a light-integrating subassembly, is used for this first light and the 3rd light are closed light fully or partly closes light (combination).
According to the light-source system of an embodiment, this light-source system has the optical system that can strengthen a certain polar biased attitude in the light, can be applicable to various light sources, and for example the light output end of light emitting diode (LED) makes output light after this system, strengthen a certain polar biased attitude of light.
Description of drawings
Fig. 1 is optical system 1 structural representation of first embodiment of the invention;
Fig. 2 a is a sandwich construction synoptic diagram of light reflecting surface 112 in the glass prism 104 of high index of refraction of Fig. 1 embodiment;
Fig. 2 b is the concern synoptic diagram of non-equal tropism's film 210 among the present invention with corresponding three main shafts;
Fig. 3 is optical system 3 structural representations of second embodiment of the invention;
Fig. 4 is the structural representation of the embodiment of light-source system among the present invention.
The main element symbol description
1: optical system
10: polar biased spectroscope 12: the polar biased converter
14: light-integrating subassembly 100: triangular prism
102: triangular prism 104: glass prism
110: multilayer film 112: the light plane of reflection
120: 122: the one P polar biased of unpolarized light light component
126: the two P polar biased of 124:S polar biased light component light component
128:P polar biased light 202: the first is all to film
204: the second all to film 210: non-all to film
20: 21: the first main shafts of membrane interface normal
23: the three main shafts of 22: the second main shafts
220: deposition plane 222: the plane of incidence
3: optical system
314: 326: the three P polar biased of prism boundary light component
330: the first prism angles of 328:P polar biased light
334: the prism angles of 332: the second prism angles
40: luminescence component
Embodiment
To combine accompanying drawing that each specific embodiment of the present invention is further specified.Though the present invention has combined specific embodiment to describe, be to be understood that the present invention can have multiple mode to implement, and the specific embodiment that is not limited only to here to be disclosed; Specific embodiment provided by the invention makes the present invention openly more fully with complete, and makes that those skilled in the art can scope on top of of the present invention.
As shown in Figure 1, a kind of first embodiment that strengthens the optical system 1 of a certain polar biased attitude in the light of the present invention comprises a polar biased spectroscope 10, a polar biased converter 12 and an optical module 14.
This polar biased spectroscope 10 can be a gummed spectroscope, and this gummed spectroscope comprises triangular prism 100 and triangular prism 102, these two cubes that triangular prism combined.Wherein, press from both sides the multilayer film 110 of the optical thin film storehouse of multilayer high refractive index film and low refractive index film between two triangular prisms alternately, making the S polar biased light of 110 pairs of incidents of this multilayer film is high reflex, is high transmission effect to P polar biased light.In addition, plate multi-layer anti-reflective film, reduce the loss of light reflection in the cubical remaining surface of forming by triangular prism 100 and triangular prism 102.
In some embodiment, this polar biased spectroscope 10 can be a broadband polar biased spectroscope (Broadband Polarizing Cube Beamsplitter), for example Newport (
Http:// www.newport.com/) company's manufacturing, model is 05FC16BP.3, its material is SF2, can provide high efficiency
Frequency polarized minute light action.
In detail, this polar biased converter 12 is the glass prisms 104 by a high index of refraction, plates all to film and non-in its light reflecting surface 112 and all forms to film.In addition, on this glass prism 104, except this light reflecting surface 112, other surface must be coated with multi-layer anti-reflective film, in order to reduce the loss of light reflection.
As shown in Figure 1, when a unpolarized light 120 goes into to inject in the above-mentioned optical system 1, at first, when this unpolarized light 120 passes through this polar biased spectroscope 10, be divided into one the one a P polar biased light component 122 and a S polar biased light component 124 by multilayer film 110.The one P polar biased light component 122 can be through this multilayer film 110, further by these polar biased spectroscope 10 outgoing; And S polar biased light component 124 can be left the cube of this polar biased spectroscope 10 by these multilayer film 110 reflections.Then, this S polar biased light component 124 goes into to inject this polar biased converter 12, i.e. the glass prism 104 of high index of refraction.The S polar biased light component 124 of incident converts the 2nd P polar biased light component 126 in the reflecting surface 112 of glass prism 104, then penetrates from this polar biased converter 12.The 2nd P polar biased light component 126 has and the direct of travel of a P polar biased light component 122 identical (or different) and identical polar biased attitude.Utilize a light-integrating subassembly 14, can supply the 2nd a P polar biased light component 126 and a P polar biased light component 122 are closed the light of light or part completely, form a P polar biased light 128.
Please, be a sandwich construction of light reflecting surface 112 in the glass prism 104 of high index of refraction with reference to Fig. 2 a.This sandwich construction comprise glass prism 104/ first all to film 202/ non-all to film 210/ second all to the structure of film 204.According to an embodiment, glass prism 104 refractive indexes of this high index of refraction are 1.515, and material can be BK7.And first be MgF to film 202 all
2Membraneous material, its thickness is 200nm, the refraction of this membraneous material is about 1.397 when wavelength of light is about 632.8nm; Identical, second also is MgF to film 204 all
2Membraneous material, and its thickness is 30nm, this membraneous material refraction also is 1.397 approximately when wavelength of light is about 632.8nm; In addition, non-is MgF to film 210 all
2Membraneous material, thickness is 800nm, corresponding non-equal tropism's three main shafts (21,22,23), like Fig. 2 b, first main shaft 21, second main shaft 22 and the 3rd main shaft 23 are orthogonal, its three main shafts refractive index n
21, n
22, n
23Value be respectively n
21=1.215, n
22=1.216, n
23=1.260; Wherein the 3rd main shaft 23 forms an angle with film interface normal 20; α=33 degree, the 3rd main shaft 23 and membrane interface normal 20 formed planes are referred to as that deposition plane (deposition plane) 220, the second main shafts 22 are positioned on the long-pending plane 220, Shen and are vertical with the 3rd main shaft 23; First main shaft 21 is perpendicular to second main shaft 22 and the 3rd main shaft 23, and deposition plane 220 is spent with the plane of incidence 222 angles 90.
In some embodiment, this multilayer film 110 is to pass through to the visible light between the 680nm at 420nm wavelength coverage.
In some embodiment, the light of in polar biased spectroscope 10, advancing, for example: unpolarized incident light 120, a P polar biased light component 122, S polar biased light component 124 and the 2nd P polar biased light component 126, it can be left in the basket by the part of the absorption of material and disregard.And penetrate out prism extinction ratio (Extinction Ratio, Tp/Ts) at visible-range, average out to 1000: 1, Tp efficient (being that P polar biased light penetrates efficient) is on average greater than 90%, Rs efficient (being S polar biased light reflection efficiency) is on average greater than 99.5%.
In some embodiment, this is non-all can one of to be formed oblique columnar arrays by a dielectric material to film 210, and this column direction and can produce the polar biased conversion effect not on plane of incidence.In addition, this non-ly all is selected from by MgF to the dielectric material of film 210
2, SiO
2, or TiO
2The group that is constituted.
Fig. 3 is second embodiment of the present invention's one optical system 3.The polar biased spectroscope 10, polar biased converter 12 and the optical module 14 that are shown among Fig. 3 are identical haply with polar biased spectroscope 10, polar biased converter 12 and light-integrating subassembly 14 functions in being shown in Fig. 1.Polar biased converter 12 among Fig. 3, the i.e. glass prism 104 of high index of refraction, its first prism angle 330, the second prism angle 332 and prism angle 334 are about 51.5 degree, 74.09 degree and 54.41 degree respectively.In incident angle is 51.5 when spending, and in visible wavelength range, the incident S polarized light component 124 that has greater than 90% converts the 2nd P polar biased light component 126 into.Further, the 2nd P polar biased light component 126 reflexes to one of this glass prism 104 prism boundary 314 and reflects outside the prism 104.The 2nd P polar biased light component 126 is after prism boundary 314 refractions, and outgoing is one the 3rd P polar biased light component 326.The 3rd P polar biased light component 326 has and the direct of travel of a P polar biased light component 122 identical (or different) and identical polar biased attitude.Then utilize a light-integrating subassembly 14 to supply the 3rd a P polar biased light component 326 and a P polar biased light component 122 are closed light fully or partly close light, form a P polar biased light 328.In Fig. 3, have structure, assembly with Fig. 1 duplicate numbers mark, corresponding structure in its same execution graph 1, the function that assembly had are seldom done at this and to be given unnecessary details.
Optical system according to above-mentioned Fig. 1, Fig. 2 a, Fig. 2 b or Fig. 3 embodiment is applied to the light output end that various light sources comprise light emitting diode, makes to export light strengthens light after this system a certain polar biased attitude, in order to promote the polar biased service efficiency of light.As shown in Figure 4, a luminescence component 40, for example: light emitting diode, launch a unpolarized light 120 and get in the optical system 1.At first, through forming a P polar biased light component 122 and S polar biased light component 124 behind the polar biased spectroscope 10 respectively.Then, after this S polar biased light component 124 gets into polar biased converter 12, form the 2nd P polar biased light component 126.At last, by optical module 14 a P polar biased light component 122 is combined to form P polar biased light 128 with the 2nd P polar biased light component 126.In Fig. 4, have structure, assembly with Fig. 1 duplicate numbers mark, corresponding structure in its same execution graph 1, the function that assembly had are seldom done at this and to be given unnecessary details.
Because above-mentioned exposure about Fig. 1 and Fig. 3 and Fig. 4 embodiment is able to reach the aforesaid invention creation of the present invention purpose.
Though each embodiment of the present invention is illustrated through accompanying drawing and preceding detailed description; But should be appreciated that the present invention is not limited only to the embodiment disclosed herein, and can under the prerequisite of essence of the present invention, carry out multiple configuration, modification and equivalent transformation.
For example one, the polar biased light 122,124 that polar biased spectroscope 10 also can be designed to be exported is respectively S polar biased light component, P polar biased light component.At this moment, the function of polar biased converter 12 is to convert P polar biased light component to S polar biased light component.
For example two, the polar biased light 122,124 that polar biased spectroscope 10 also can be designed to be exported is respectively a left side (ellipse) circle polar biased light component, the right side (ellipse) circle polar biased light component.At this moment, the function of polar biased converter 12 is to convert the right side (ellipse) circle polar biased light component to a left side (ellipse) circle polar biased light component.
For example three, the film 202,204 and 210 in the polar biased converter 12 can use single thickness to be 800nm, and its three main shafts refractive index is n
21=1.897, n
22=1.685, n
23=1.751 non-ly all replace, also can reach broadband polar biased conversion effect to film.
For example four, the film 202,204 and 210 in the polar biased converter 12 can use that multilayer is non-all to be replaced to the film storehouse, can reach the polar biased conversion effect of broadband and wide-angle.
Claims (9)
1. the optical system that can strengthen a certain polar biased attitude in the light is characterized in that, comprises:
One polar biased spectroscope is used for an input light is separated into one first light and one second light, and this first light has one first polar biased mode, and this second light has one second polar biased mode, and this first polar biased mode is different from this second polar biased mode;
One polar biased converter; Import this second light; Supply conversion polarization mode and export one the 3rd light, the 3rd light has significantly this more first polar biased mode, and wherein the polar biased converter can provide total reflection or high reflection; This polar biased converter comprises non-equal tropism's optical thin film at least, between a medium of incident medium of high index of refraction and low-refraction.
2. a kind of optical system as claimed in claim 1; It is characterized in that; Said polar biased spectroscope is a gummed spectroscope; This gummed spectroscope comprises the optical thin film storehouse that accompanies multilayer high refractive index film and low refractive index film between two triangular prisms alternately, and making this multilayer film storehouse is high reflex to the S polar biased light of incident, and this multilayer film storehouse is high transmission effect to P polar biased light.
3. a kind of optical system as claimed in claim 1 is characterized in that, what this polar biased converter was carried out converts the part conversion into or be conversion fully.
4. a kind of optical system as claimed in claim 1 is characterized in that this system further comprises an assembly, is used for this first light and the 3rd light are closed light fully or partly closes light.
5. a kind of optical system as claimed in claim 1 is characterized in that, the said first polar biased mode is the P polar biased, and this second polar biased mode is the S polar biased.
6. a kind of optical system as claimed in claim 1 is characterized in that, said non-be a dielectric material formed one oblique columnar arrays all to optical thin film, this column direction and can produce the polar biased conversion effect not on plane of incidence.
7. a kind of optical system as claimed in claim 1 is characterized in that, said incident medium is a glass prism.
8. a kind of optical system as claimed in claim 1 is characterized in that, said non-equal tropism's optical thin film dielectric material is selected from MgF
2, SiO
2, or TiO
2In a kind of.
9. light-source system with the optical system that can strengthen a certain polar biased attitude in the light; Can be applicable to various light sources required in the photovoltaic and comprise the light output end of light emitting diode; Make output light after this system, strengthen a certain polar biased attitude of light, it is characterized in that, comprise:
One polar biased spectroscope is used for an input light is separated into one first light and one second light, and this first light has one first polar biased mode, and this second light has one second polar biased mode, and this first polar biased mode is different from this second polar biased mode;
One polar biased converter; Import this second light; Supply conversion polar biased mode and export one the 3rd light, the 3rd light has significantly this more first polar biased mode, and wherein the polar biased converter provides total reflection or high reflection; Said polar biased converter comprises non-equal tropism's optical thin film at least, between a medium of incident medium of high index of refraction and low-refraction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102257587A CN102331628A (en) | 2010-07-13 | 2010-07-13 | Optical system capable of enhancing polarization in light ray and light source system with same |
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|---|---|---|---|
| CN2010102257587A CN102331628A (en) | 2010-07-13 | 2010-07-13 | Optical system capable of enhancing polarization in light ray and light source system with same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676181A (en) * | 2012-09-13 | 2014-03-26 | 任贻均 | Reflective phase retarder and semiconductor light emitting device including the same |
| CN104280810A (en) * | 2014-09-30 | 2015-01-14 | 京东方科技集团股份有限公司 | Polarizer and display device |
| CN105425468A (en) * | 2016-01-04 | 2016-03-23 | 京东方科技集团股份有限公司 | Straight-down-type backlight module and display device |
| CN106405933A (en) * | 2016-10-31 | 2017-02-15 | 京东方科技集团股份有限公司 | Backlight module and liquid crystal display device |
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| CN2533477Y (en) * | 2002-01-24 | 2003-01-29 | 邵剑心 | High extinction ratio polarization prism spectrometer |
| CN1619354A (en) * | 2003-11-18 | 2005-05-25 | 国振才 | Secondary reflection type broad band polarizing prism set anti dazzle spectroscope |
| TW200718986A (en) * | 2005-11-07 | 2007-05-16 | yi-jun Ren | Optical configuration for generating polarization conversion |
| US20070279739A1 (en) * | 2006-06-05 | 2007-12-06 | Samsung Electronics Co., Ltd. | Polarization converting light guide panel unit and display device having the same |
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| CN1281998A (en) * | 1999-07-21 | 2001-01-31 | 三星电子株式会社 | Polarized light changeable device for projected display unit |
| CN2533477Y (en) * | 2002-01-24 | 2003-01-29 | 邵剑心 | High extinction ratio polarization prism spectrometer |
| CN1619354A (en) * | 2003-11-18 | 2005-05-25 | 国振才 | Secondary reflection type broad band polarizing prism set anti dazzle spectroscope |
| TW200718986A (en) * | 2005-11-07 | 2007-05-16 | yi-jun Ren | Optical configuration for generating polarization conversion |
| US20070279739A1 (en) * | 2006-06-05 | 2007-12-06 | Samsung Electronics Co., Ltd. | Polarization converting light guide panel unit and display device having the same |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676181A (en) * | 2012-09-13 | 2014-03-26 | 任贻均 | Reflective phase retarder and semiconductor light emitting device including the same |
| CN104280810A (en) * | 2014-09-30 | 2015-01-14 | 京东方科技集团股份有限公司 | Polarizer and display device |
| CN105425468A (en) * | 2016-01-04 | 2016-03-23 | 京东方科技集团股份有限公司 | Straight-down-type backlight module and display device |
| CN106405933A (en) * | 2016-10-31 | 2017-02-15 | 京东方科技集团股份有限公司 | Backlight module and liquid crystal display device |
| WO2018076608A1 (en) * | 2016-10-31 | 2018-05-03 | 京东方科技集团股份有限公司 | Backlight module and liquid crystal display device |
| US20190004356A1 (en) * | 2016-10-31 | 2019-01-03 | Boe Technology Group Co., Ltd. | Backlight module and liquid crystal display device |
| CN106405933B (en) * | 2016-10-31 | 2019-08-13 | 京东方科技集团股份有限公司 | Backlight module and liquid crystal display device |
| US10824013B2 (en) | 2016-10-31 | 2020-11-03 | Boe Technology Group Co., Ltd. | Backlight module and liquid crystal display device |
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Application publication date: 20120125 |