CN102722034A - Polarization light splitting device and correlation light source - Google Patents
Polarization light splitting device and correlation light source Download PDFInfo
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Abstract
Embodiments of the invention disclose a polarization light splitting device and a correlation light source. The polarization light splitting device comprises a color wheel. The color wheel comprises a first area. The first area is provided with a function material. A wire grid polarizer, which is stacked and fixed on a light emission side of the color wheel, comprises a circular area corresponding to the color wheel. The circular area comprises a first polarization section corresponding to the first area. The first polarization section is provided with a first metal line array. The first metal line array is in a radial shape in which a centre of a circle is the center or is in a multiple-concentric-circle state of the circle. A driving device is used to drive the color wheel and the wire grid polarizer to rotate along the center of the circle. In the embodiments of the invention, the polarization light splitting device can emit polarized light during a rotation process.
Description
Technical field
The present invention relates to illumination and display technique field, particularly relate to a kind of light splitting device and relevant source.
Background technology
At present, solid state light emitter is because characteristics such as its long-life, environmental protection have obtained application widely in general illumination, special lighting and Projection Display.Wherein, the white light solid state light emitter has huge development potentiality especially at lighting field.
United States Patent (USP) 7547114 proposes a kind of light-source structure, and as shown in Figure 1, this light-source structure comprises excitation source 100, condenser lens 102 and runner 104.Runner 104 is divided into a plurality of subregions, and each subregion comprises a kind of material for transformation of wave length.The exciting light line focus lens 102 that excitation source 100 sends focus on the material for transformation of wave length of runner 104, and this material for transformation of wave length absorbs this exciting light and produces stimulated luminescence.Runner 104 rotates around its rotating shaft A, and along with the rotation of runner, this light-source structure produces a polychromatic light sequence of being made up of different stimulated luminescences.
Because the stimulated luminescence that material for transformation of wave length produces is a nonpolarized light, therefore above-mentioned patent also proposes another kind of light-source structure.As shown in Figure 2, rectangle movable platen 130 has substituted the runner 104 among Fig. 1.130 linear oscillators of rectangle movable platen, and be divided into 3 subregions along its linear oscillator direction, each subregion comprises material for transformation of wave length 110R, 110G, 110B respectively.Quarter-wave plate 132 is range upon range of, and to be fixed on material for transformation of wave length 110R, 110G, 110B last, reflective polarizer 128 range upon range of being fixed on the quarter-wave plate 132.Reflective polarizer 128 is the linear polarizer of polarization direction consistent (promptly the polarization direction is parallel everywhere) everywhere; Linear oscillator along with movable platen 130; Polychrome polarized light sequence of forming by different stimulated luminescences of reflective polarizer 128 outgoing, so this light-source structure need can be applicable to the technical field of outgoing polarized light.But the fixation reflex polarizer can't be applied in the light-source structure shown in Figure 1 with the technology of outgoing polarized light on the material for transformation of wave length, and reason is following: if with reflective polarizer 128 range upon range of being fixed on the runner 104; This reflective polarizer 128 will rotate along with runner 104 together; In the process of rotation, light source outgoing polarization state of light can constantly change along with the rotation of reflective polarizer, that is all is different with the outgoing polarization state of light in difference moment in one-period; Therefore; From a period of motion of runner 104, the emergent light of light source does not have polarization state, and promptly reflective polarizer has lost effect.
Can't be applied to the technical matters of light-source structure shown in Figure 1 to above-mentioned reflective polarizer; Chinese patent 101923223A proposes a kind of polarized light source; The difference part of this polarized light source and light source shown in Figure 1 is: this polarized light source also comprises stationary installation and is fixed on the reflective polarizer on the stationary installation; Runner has rotary state with respect to stationary installation, and reflective polarizer is near the bright dipping side of material for transformation of wave length on the runner.Because reflective polarizer remains staticly in the runner rotation process, so reflective polarizer can the stable polarized light of outgoing.
In research and practice process to prior art; Inventor of the present invention finds: in the above-mentioned polarized light source; Since with reflective polarizer near runner in rotation process, have oscillation phenomenon; Therefore can not lean on too closely between runner and the reflective polarizer, otherwise polarizer can be got to and damage by runner.But can not leave too far again between runner and the reflective polarizer, otherwise on the runner light of material for transformation of wave length outgoing drop on the hot spot of reflective polarizer can be too big, thereby cause the brightness of polarization emergent light low excessively.
Summary of the invention
The technical matters that the present invention mainly solves provides a kind of light splitting device and relevant source, and this light splitting device can the outgoing polarized light in rotation process.
The embodiment of the invention provides a kind of light splitting device, comprising: colour wheel, and this colour wheel comprises the first area, the first area is provided with functional material; The range upon range of wire grid polarizer that is fixed on colour wheel bright dipping side; Comprise the border circular areas corresponding with colour wheel; This border circular areas comprises first polarization sections corresponding with the first area; First polarization sections is provided with first array of metal lines, and it is the radial of center that first array of metal lines is with this circular center of circle, perhaps is a plurality of concentric circles of this circle; Drive unit is used to drive colour wheel and wire grid polarizer rotates along the center of circle.
The embodiment of the invention also provides a kind of light splitting device; Comprise: wire grid polarizer; Comprise and have a border circular areas; This border circular areas comprises first polarization sections that is provided with first array of metal lines, and it is the radial of center that first array of metal lines is with this circular center of circle, perhaps is a plurality of concentric circles of this circle; Drive unit is used to drive wire grid polarizer and rotates along the center of circle.
The embodiment of the invention also provides a kind of light source, comprises above-mentioned light splitting device.
Compared with prior art, the embodiment of the invention comprises following beneficial effect:
In the embodiment of the invention; The center of circle that first array of metal lines of the wire grid polarizer of light splitting device is with circle is the radial of center; The a plurality of concentric circles that perhaps are this circle; Thereby drive this wire grid polarizer when rotate in this center of circle at drive unit, the polarization direction when each position of wire grid polarizer forwards the hot spot place to all be substantially equal to this hot spot place circumferentially or radially, thereby light splitting device can the outgoing polarization direction be substantially equal to this hot spot place circumferentially or polarized light radially.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the light-source structure of existing patent 7547114;
Fig. 2 is the side view of another embodiment of the light-source structure of existing patent 7547114;
Fig. 3 is the side view of an embodiment of light splitting device in the embodiment of the invention;
Fig. 4 is the vertical view of middle colour wheel embodiment illustrated in fig. 3;
Fig. 5 is the vertical view of middle wire grid polarizer embodiment illustrated in fig. 3;
Fig. 6 is the vertical view of the alternative embodiment of wire grid polarizer shown in Figure 5;
Fig. 7 is the vertical view of the alternative embodiment of colour wheel shown in Figure 4;
Fig. 8 is the vertical view of the alternative embodiment of colour wheel shown in Figure 4;
Fig. 9 is the structural representation of another embodiment of light splitting device in the embodiment of the invention;
Figure 10 is the vertical view of middle colour wheel embodiment illustrated in fig. 9;
Figure 11 is the vertical view of middle wire grid polarizer embodiment illustrated in fig. 9;
Figure 12 a and Figure 12 b are respectively the colour wheel of another embodiment of light splitting device in the embodiment of the invention and the vertical view of wire grid polarizer;
Embodiment
Below in conjunction with accompanying drawing and embodiment the embodiment of the invention is elaborated.
Embodiment one
See also Fig. 3, Fig. 4 and Fig. 5; Fig. 3 is the side view of an embodiment of light splitting device in the embodiment of the invention; Fig. 4 is the vertical view of middle colour wheel embodiment illustrated in fig. 3, and Fig. 5 is the vertical view of middle wire grid polarizer (wire grid polarizer) embodiment illustrated in fig. 3.As shown in Figure 3, light splitting device 300 comprises colour wheel 310, wire grid polarizer 320 and drive unit 330.
As shown in Figure 4, colour wheel 310 is the circle that the center of circle is O, and colour wheel 310 comprises first area 311, and first area 311 specifically is the ring-type with this circular shape concentric in the present embodiment.Be understood that easily first area 311 also can be other arbitrary shape in other embodiments.First area 311 is provided with functional material.Functional material can be material for transformation of wave length, scattering material, optical filter, slide etc.For example, the first area can be provided with the red light wavelength transition material that can blue light be converted into ruddiness, or the scattering particles that light is carried out scattering, or the optical filter of transmit red light only, or the simple glass sheet that can let light see through.The most frequently used material for transformation of wave length is a fluorescent powder, yttrium aluminum garnet (YAG) fluorescent powder for example, and it can absorb blue light and the yellow Stimulated Light of stimulated emission.Material for transformation of wave length possibly be the material that quantum dot, fluorescent dye etc. have wavelength conversion capability also, is not limited to fluorescent powder.In the present embodiment, the functional material of first area 311 is specially gold-tinted fluorescent powder.
In addition, in the present embodiment, colour wheel 310 is specially the transmission-type colour wheel, and promptly the light direction of colour wheel 310 is with to go into light direction identical.Preferably, the incident side of colour wheel 310 is provided with the optical filter of transmission exciting light reflect yellow, to improve the light emission rate of colour wheel 310.Certainly, colour wheel 310 also can be reflective colour wheel, and promptly the light direction of colour wheel 310 and light inlet are in the opposite direction.
Wire grid polarizer belongs to a kind of of linear polarizer, and it is to form wiregrating transparent and reflection through the array of metal lines of being made up of many metal line is set on transparency carrier, and the interval between the adjacent wires is very little, is nanoscale; Be incident in the light of wire grid polarizer, only the luminous energy perpendicular to the direction of vibration of array of metal lines trend can see through wire grid polarizer, and this is a known technology, does not give unnecessary details here.
Like Fig. 3 and shown in Figure 5, the wire grid polarizer 320 range upon range of bright dipping sides that are fixed on colour wheel 310.Wire grid polarizer 320 comprises the border circular areas corresponding with colour wheel 310, and this border circular areas comprises first polarization sections 321 corresponding with first area 311, and promptly first polarization sections 321 is and ring-type above-mentioned circular shape concentric identical with first area 311.First polarization sections 321 is provided with first array of metal lines 3211.In the present embodiment, the center of circle O that first array of metal lines 3211 is with above-mentioned circle is the radial of center.
As shown in Figure 3, drive unit 330 is used to drive colour wheel 310, and O rotates along the center of circle with wire grid polarizer 320.Drive unit 330 can be fixedly connected with colour wheel 310, also can be fixedly connected with wire grid polarizer 320.In the present embodiment, drive unit is specially motor, and the rotating shaft of this motor is fixedly connected with colour wheel.
Suppose to have the first area 311 of a branch of blue excitation light A, because colour wheel 310 is in 330 times rotations of drive unit, so the hot spot of exciting light A 311 formation in the first area acts on first area 311 along circular path from the left side incident colour wheel of colour wheel 310.The gold-tinted fluorescent powder of first area 311 converts blue light into gold-tinted, and this gold-tinted is from first polarization sections 321 of the right outgoing to the wire grid polarizer 320 of colour wheel 310.As shown in Figure 5, the rectangular light spots that the gold-tinted of the past wire grid polarizer 320 of colour wheel 310 outgoing drops on first array of metal lines 3211 is S.Because it is the radial of center that first array of metal lines 3211 is with center of circle O, and the interval between the adjacent wires is very little, so each metal wire in the hot spot S can be approximated to be parallel lines; Again because first array of metal lines is the radial of circumference symmetry; Distribute all identical so 3211 per moment of first array of metal lines go to each metal wire at hot spot S place; Therefore 3211 per moment of first array of metal lines go to hot spot S place each metal wire all a transmission near normal in the yellow polarized light of the polarization direction of these parallel lines (hereinafter to be referred as first polarization state), thereby make the polarized light P that first polarization sections 321 of wire grid polarizer can outgoing first polarization state in rotation process.
And; Each metal wire that 3211 per moment of first array of metal lines go to hot spot S place all reflects the approximate yellow polarized light that is parallel to the polarization direction (hereinafter to be referred as second polarization state) of above-mentioned parallel lines; Therefore, first polarization sections 321 all reflects gold-tinted to the colour wheel 310 of second polarization state in rotation process.Because gold-tinted fluorescent powder has the characteristic of scattered light; The polarization state of the gold-tinted of second polarization state is eliminated through the scattering of gold-tinted fluorescent powder; Promptly the gold-tinted of second polarization state is converted into unpolarized attitude light by gold-tinted fluorescent powder; Have 50% when therefore this unpolarized attitude light is reflected back toward wire grid polarizer 320 and be able to utilize, promptly become the gold-tinted and the outgoing of first polarization state, thereby make that light splitting device 300 can the more polarized light of outgoing.
In the prior art; The polarization direction everywhere of light splitting device is parallel; Thereby the polarization direction of emergent light can constantly change in rotation process; All be different with different outgoing polarization state of light constantly in one-period promptly, the emergent light of the light splitting device in therefore rotating does not have polarization state, and promptly the polaroid in the light splitting device can't the outgoing polarized light.In the present embodiment; The center of circle that first array of metal lines of the wire grid polarizer of light splitting device is with circle is the radial of center; Thereby drive this wire grid polarizer when rotate in this center of circle at drive unit; Polarization direction when each position of wire grid polarizer forwards the hot spot place to all is substantially equal to the circumferential of this hot spot place, thereby light splitting device can be substantially equal to this circumferential polarized light in the outgoing polarization direction.
Embodiment two
See also Fig. 6, Fig. 6 is the vertical view of the alternative embodiment of wire grid polarizer shown in Figure 5.As shown in Figure 6, present embodiment and difference part embodiment illustrated in fig. 5 are: first array of metal lines 6211 of first polarization sections 621 of wire grid polarizer 620 is a plurality of concentric circles of above-mentioned circle.Because the interval between the adjacent wires of first array of metal lines 6211 is very little, so each metal wire in the hot spot S can be approximated to be parallel lines; Again because first array of metal lines 6211 is the concentric circles of circumference symmetry; Distribute all identical so 6211 per moment of first array of metal lines go to each metal wire at hot spot S place; Therefore 6211 per moment of first array of metal lines go to hot spot S place each metal wire all a transmission near normal in the yellow polarized light of the polarization direction of these parallel lines (second polarization state), thereby make the polarized light that first polarization sections 621 of wire grid polarizer can outgoing second polarization state in rotation process.
Embodiment three
See also Fig. 7, Fig. 7 is the vertical view of the alternative embodiment of colour wheel shown in Figure 4.As shown in Figure 7, present embodiment and difference part embodiment illustrated in fig. 4 are: the first area 711 of colour wheel 710 comprises the first look section 7111, is provided with first material for transformation of wave length; The second look section 7112 is provided with second material for transformation of wave length; The 3rd look section 7113 is provided with the three-wavelength transition material.Particularly, first, second, third look section is respectively equipped with the material for transformation of wave length that can excitation wavelength be converted into ruddiness, green glow and blue light.And of all kinds section of first area 711 all is the fan annular, and along colour wheel rounded circumferential distribution.
In the present embodiment, exciting light can be ultraviolet light or black light.Suppose the first area 711 of exciting light incident colour wheel, then colour wheel rotates under the driving of drive unit, and in regular turn outgoing ruddiness, blue light and green glow to wire grid polarizer, red, the green and blue polarized light of wire grid polarizer outgoing in regular turn.What be worth explanation is; The first look section 7111 also can change establishes scattering material; This moment, exciting light can be blue laser diode LD (Laser Diode) or blue LED (LED; Light Emitting Diode), so that wire grid polarizer outgoing in regular turn is red, green and blue polarized light.
Be understood that easily first area 711 also can comprise the look section of other quantity, for example two sections, four sections or five sections, and of all kinds section also can be provided with other functional material, for example scattering material, optical filter or slide etc.
Embodiment four
See also Fig. 8, Fig. 8 is the vertical view of the alternative embodiment of colour wheel shown in Figure 4.As shown in Figure 8; Present embodiment and difference part embodiment illustrated in fig. 7 are: the first look section of the first area of colour wheel 810 (red look section), 8111, the second look section (green look section) the 8112 and the 3rd look section (blue look section) 8113 all be with colour wheel rounded concentric annular, and along this circular radial distribution.
Embodiment five
See also Fig. 9-11, Fig. 9 is the structural representation of another embodiment of light splitting device in the embodiment of the invention, and Figure 10 is the vertical view of middle colour wheel embodiment illustrated in fig. 9, and Figure 11 is the vertical view of middle wire grid polarizer embodiment illustrated in fig. 9.As shown in Figure 9, light splitting device 900 comprises colour wheel 910, wire grid polarizer 920 and drive unit 930.
Present embodiment and difference part embodiment illustrated in fig. 4 comprise:
(1) colour wheel 910 is reflective colour wheel, promptly colour wheel go into light direction and bright dipping opposite, incident side is identical with the bright dipping side.Because wire grid polarizer need be arranged at the bright dipping side (incident side) of colour wheel; Therefore exciting light A will pass through wire grid polarizer 920 incident colour wheels 910; Therefore present embodiment is applicable to that preferably exciting light is the application scenarios of polarized light that meets the polarization direction of wire grid polarizer 920, for example meets the Ultra-Violet Laser of wire grid polarizer 920 polarization directions.
(2) shown in figure 10, colour wheel 910 also comprises the second area 912 that is provided with functional material except comprising first area 911.Particularly, first area 911 and second area 912 be adjacent and colour wheel rounded two concentric ring-types, be respectively two adjacent interior ring and outer shrouds.First area 911 comprises red look section 9111, green look section 9112 and blue look section 9113; Second area 912 comprises red look section 9121, green look section 9122 and blue look section 9123; Of all kinds section of first area and second area all is the fan annular, and the relative center of circle of look section of the same color of first area 911 and second area 912 is 0 degree setting.
(3) shown in figure 11; Corresponding with colour wheel 910; Wire grid polarizer 920 is except comprising first polarization sections 921; Also comprise second polarization sections 922 corresponding, and first polarization sections 921 and second polarization sections 922 are the ring-type identical with first area 911 and second area 912 respectively with the second area of colour wheel 910 912.Second polarization sections 922 is provided with second array of metal lines 9221.And it is the radial of center that first array of metal lines 9211 of first polarization sections 921 is with center of circle O, second array of metal lines 9221 of second polarization sections 922 be colour wheel rounded a plurality of concentric circles.
Suppose to have a branch of Ultra-Violet Laser A to be incident to colour wheel 910; The hot spot S that this laser drops on colour wheel covers first area 911 and second area 912 simultaneously; So; According to the description of Fig. 5 and 6 illustrated embodiments, in the present embodiment, first polarization sections, 921 ruddiness, green glow and the blue lights of wire grid polarizer 920 with first polarization state of outgoing in regular turn; Second polarization sections, 922 ruddiness, green glow and blue lights with second polarization state of outgoing in regular turn; Therefore light splitting device 900 will be against the ruddiness of laser incident direction outgoing in regular turn first (the second) polarization state, the green glow of first (the second) polarization state and the blue light of first (the second) polarization state, indicates the polarized light of light splitting device 900 outgoing among the figure with P.
Be understood that easily, as long as first array of metal lines 9211 is different with the distribution of second array of metal lines 9221, then can be so that wire grid polarizer can two kinds of polarized lights of outgoing.Therefore in other embodiments; First array of metal lines 9211 that wire grid polarizer 920 also can change first polarization sections 921 into be colour wheel rounded a plurality of concentric circles, be the radial of center and second array of metal lines 9221 of second polarization sections 922 is with center of circle O.
Embodiment six
See also Figure 12 a and Figure 12 b, Figure 12 a and Figure 12 b are respectively the colour wheel of another embodiment of light splitting device in the embodiment of the invention and the vertical view of wire grid polarizer.Present embodiment and difference part embodiment illustrated in fig. 9 are:
(1) shown in Figure 12 a, the first area of colour wheel 1,210 1211 all is the fan annular with second area 1212, and composition and colour wheel rounded concentric ring-type.First area 1211 comprises red look section 1213, green look section 1214 and blue look section 1215; Second area 1212 comprises red look section 1216, green look section 1217 and blue look section 1218; Each look Duan Jun in two zones is the fan annular, and the relative center of circle of look section of the same color of first area 1211 and second area 1212 is 180 degree settings.
(2) shown in Figure 12 b, corresponding with colour wheel 1210, first polarization sections 1221 of wire grid polarizer 1220 and second polarization sections 1222 are the fan annular identical with first area 1211, second area 1212 respectively.It is the radial of center that first array of metal lines 1223 of first polarization sections 1221 is with center of circle O, second array of metal lines 1224 of second polarization sections 1222 be colour wheel rounded a plurality of concentric circles.
Suppose to have a branch of Ultra-Violet Laser A to be incident to colour wheel 1210; Rotation along with colour wheel; This laser drops on the first area 1211 of colour wheel and the hot spot of second area 1212 acts on colour wheel along circular path, so, and according to the description of Fig. 5 and 6 illustrated embodiments; In the present embodiment, first polarization sections, 1221 ruddiness, green glow and the blue lights of wire grid polarizer 1220 with first polarization state of outgoing in regular turn; Second polarization sections, 922 ruddiness, green glow and blue lights with second polarization state of outgoing in regular turn; Light splitting device will be against the ruddiness of laser incident direction outgoing in regular turn first polarization state, the green glow of first polarization state, the blue light of first polarization state, the ruddiness of second polarization state, the green glow of second polarization state and the blue light of second polarization state, indicates the polarized light of light splitting device 1200 outgoing among the figure with P.
Need to prove here, Fig. 9 and embodiment illustrated in fig. 12 in, the first area of colour wheel and second area also can comprise the look section of varying number, of all kinds section functional material also can be different.For example, the first area comprises ruddiness, green glow and blue light wavelength transition material, and second area comprises blue light scattering material and yellow wavelengths transition material.In addition, the first area of colour wheel and second area all can have only a look section, and for example first area and second area have only a red look section and green look section respectively.When first area and second area all had only a look section, the look section of first area and second area preferably was provided with the identical functions material, and gold-tinted fluorescent powder for example all is set, so that wire grid polarizer can be simultaneously or the gold-tinted of two kinds of polarization states of outgoing in regular turn.
Embodiment seven
Above-mentioned light splitting device includes colour wheel, and in fact, colour wheel is the applied a kind of scene of rotating wire grid polarization light.As long as the wire grid polarizer that rotates has the array of metal lines that above-mentioned circumference is symmetrically distributed, then wire grid polarizer can be when rotating the outgoing polarized light.Therefore, the embodiment of the invention also provides another embodiment of light splitting device, and this light splitting device comprises:
Wire grid polarizer comprises a border circular areas, and this border circular areas comprises first polarization sections that is provided with first array of metal lines, and it is the radial of center that first array of metal lines is with this circular center of circle, perhaps is a plurality of concentric circles of this circle; Drive unit is used to drive wire grid polarizer and rotates along this center of circle.
First polarization sections can be arbitrary shape.Preferably, first polarization sections is the ring-type with above-mentioned circular shape concentric.Above-mentioned border circular areas can also comprise second polarization sections that is provided with second array of metal lines; The center of circle that second array of metal lines is with above-mentioned circle is the radial of center or a plurality of concentric circles that are this circle; And different with first array of metal lines, so that wire grid polarizer can two kinds of polarized lights of outgoing.And first polarization sections and second polarization sections can be adjacent and two ring-types above-mentioned circular shape concentric, so that wire grid polarizer two kinds of polarized lights of outgoing simultaneously when rotating; Perhaps, first polarization sections and second polarization sections also can all be the fan annular, and the ring-type of composition and above-mentioned circular shape concentric, so that wire grid polarizer two kinds of polarized lights of outgoing in regular turn when rotating.
The embodiment of the invention also provides a kind of light source, and this light source comprises light splitting device, and this light splitting device can have structure and the function among above-mentioned each embodiment.
Light splitting device in the embodiment of the invention can be applied to optical projection system, for example LCD (LCD, Liquid Crystal Display) or digital light path processor (DLP, Digital LightProcessor) projector; Also can be applied to illuminator, for example car lighting lamp; Also can be applied in the 3D display technique field.
The above is merely embodiment of the present invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes instructions of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (16)
1. a light splitting device is characterized in that, comprising:
Colour wheel, this colour wheel comprises the first area, the first area is provided with functional material;
The range upon range of wire grid polarizer that is fixed on said colour wheel bright dipping side; Comprise the border circular areas corresponding with said colour wheel; This border circular areas comprises first polarization sections corresponding with the first area; First polarization sections is provided with first array of metal lines, and it is the radial of center that first array of metal lines is with this circular center of circle, perhaps is a plurality of concentric circles of this circle;
Drive unit is used to drive said colour wheel and wire grid polarizer and rotates along the said center of circle.
2. light splitting device according to claim 1 is characterized in that said functional material comprises material for transformation of wave length or scattering material.
3. light splitting device according to claim 1 is characterized in that, the first area and first polarization sections all are the ring-type with said circular shape concentric.
4. light splitting device according to claim 3 is characterized in that the first area comprises at least:
The first look section is provided with first material for transformation of wave length and/or scattering material;
The second look section is provided with second material for transformation of wave length.
5. light splitting device according to claim 4 is characterized in that, of all kinds section of the first area all is the fan annular, and the circumferential distribution of the said circle in edge; Perhaps, of all kinds section of the first area all ringwise, and the radial distribution of the said circle in edge.
6. light splitting device according to claim 1 is characterized in that colour wheel also comprises second area, and second area is provided with functional material;
Said border circular areas also comprises second polarization sections corresponding with second area; Second polarization sections is provided with second array of metal lines; It is the radial of center or a plurality of concentric circles that are this circle that second array of metal lines is with this circular center of circle, and different with first array of metal lines.
7. light splitting device according to claim 6 is characterized in that, first area and second area are adjacent and two ring-types said circular shape concentric.
8. light splitting device according to claim 7 is characterized in that, first area and second area include red look section, green look section and blue look section, and the said relatively center of circle of the look section of the same color of first area and second area is 0 degree setting.
9. light splitting device according to claim 6 is characterized in that, first area and second area all are the fan annular, and the ring-type of composition and said circular shape concentric.
10. light splitting device according to claim 9; It is characterized in that; First area and second area include red look section, green look section and blue look section, and the said relatively center of circle of the look section of the same color of first area and second area is 180 degree settings.
11. light splitting device according to claim 6 is characterized in that, first area and second area all have only a look section, and the look section of first area and second area is provided with the identical functions material.
12. a light splitting device is characterized in that, comprising:
Wire grid polarizer comprises having a border circular areas, and this border circular areas comprises first polarization sections that is provided with first array of metal lines, and it is the radial of center that first array of metal lines is with this circular center of circle, perhaps is a plurality of concentric circles of this circle;
Drive unit is used to drive said wire grid polarizer and rotates along the said center of circle.
13. light splitting device according to claim 12 is characterized in that, first polarization sections is the ring-type with said circular shape concentric.
14. light splitting device according to claim 12; It is characterized in that; Said border circular areas also comprises second polarization sections that is provided with second array of metal lines; It is the radial of center or a plurality of concentric circles that are this circle that second array of metal lines is with this circular center of circle, and different with first array of metal lines.
15. light splitting device according to claim 14 is characterized in that, first polarization sections and second polarization sections are adjacent and two ring-types said circular shape concentric; Perhaps,
First polarization sections and second polarization sections all are the fan annular, and the ring-type of composition and said circular shape concentric.
16. a light source is characterized in that, comprises like each described light splitting device in the claim 1 to 15.
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| CN102722034B (en) | 2015-10-07 |
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