CN102095161B - Area light source collimation device - Google Patents
Area light source collimation device Download PDFInfo
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- CN102095161B CN102095161B CN201010564539A CN201010564539A CN102095161B CN 102095161 B CN102095161 B CN 102095161B CN 201010564539 A CN201010564539 A CN 201010564539A CN 201010564539 A CN201010564539 A CN 201010564539A CN 102095161 B CN102095161 B CN 102095161B
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- collimation
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- 239000000463 material Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 5
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 7
- 230000008033 biological extinction Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
The invention relates to the field of optical collimation, in particular to an area light source optical collimation device which comprises a reflection plate, a collimation layer and a calibration layer, wherein the collimation layer and the calibration layer are sequentially arranged above the reflection plate; the bottom of the collimation layer is coated with a reflection layer and a small hole; by virtue of the actions of the reflection layer and the reflection plate, an area light source between the reflection plate and the collimation layer is converged in the small hole, thus a spot light source is formed; the collimation layer divides the light rays entered into the small hole into a plurality of regions and converges the regions respectively, thereby avoiding the optical loss caused by the total reflection in the collimation layer; and the calibration layer is used for adjusting the light rays emitted from the collimation layer, so that the light rays can emit at the direction which is in parallel to the axis of the small hole. So the area light source collimation device provided by the invention has a higher collimation effect and a higher energy utilization ratio.
Description
Technical field
The present invention relates to the optical alignment field, especially area source optical alignment device.
Background technology
Planar light source is commonly used in aspects such as illumination, LCD display backlight, lamp box, and for wide viewing angle is considered, common plane light source luminescent angle is very big.In recent years, along with the development that energy-conservation subject under discussion and 3D show, the research of high collimation plane light source becomes focus.
Except laser, general light source is generally the scatter-type light source, that is lighting angle is big, does not have collimation and goes out light characteristic.Reach collimation and go out light characteristic, must add that some optical elements could control light and penetrate direction and concentrate in the low-angle.Area source collimation means commonly used now have the 3M prism film, can make light convergence to a certain degree, and convergent angle is about 70 degree, plays certain collimating effect.But require than higher optical system for collimation, this collimation is very difficult satisfactory.
Also useful spot light adds the method that the lens mode realizes the collimation plane light source, but because the point light source light-emitting angle is excessive, makes spuious and total reflection phenomenon too serious, makes that the collimation effect is relatively poor.In order to address this is that; There is a kind of method to be to use the extinction cover that high angle scattered light is sponged, only lets low-angle light get into lens, to improve emergent ray collimation effect; But this method makes last capacity usage ratio too low, and most of light has all been sponged by the extinction cover.
In sum, there are problems such as collimation weak effect or capacity usage ratio are low in existing area source collimation technique.
Summary of the invention
The technical problem that the present invention solves provides a kind of area source collimator apparatus, makes it not only can obtain collimation effect preferably, can obtain to compare high energy utilization rate again.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is:
A kind of area source collimator apparatus; It comprises: reflector plate and the collimation layer and the correcting layer that are successively set on this reflector plate top; This collimation layer adopts the close material of light, and it comprises some micro collimating lens, and this correcting layer comprises some microprisms of aiming at these some micro collimating lens; These some micro collimating lens can display form with these some microprisms and closely arrange, and also can otherwise distribute as required;
This micro collimating lens comprises light beam convergent part and beam collimation portion; The bottom surface of this light beam convergent part is provided with aperture, and the bottom surface is covered with reflectance coating at aperture with exterior portions; This beam collimation portion is arranged on the top of this light beam convergent part, comprises standard lens and one or more layers inclination relay lens that is looped around this standard lens periphery, the aperture of this light beam convergent part of the centrally aligned of this standard lens;
This microprism comprises the planar section aimed at the standard lens of this micro collimating lens and prism rotating part corresponding with each layer inclination relay lens of this micro collimating lens and that aim at, and this prism rotating part is used for the light with this micro collimating lens inclination relay lens outgoing is roughly deflected to the axis direction of this aperture.
As one of improving: the standard lens of said micro collimating lens is its focal length of lens apart from the aperture distance; The inclination relay lens of said micro collimating lens is its focal length of lens apart from the aperture distance.
As two of improvement: said collimation layer adopts glass material or PMMA material.
As three of improvement: the angle between the outer rim of the outermost inclination relay lens of said micro collimating lens and the said aperture outer between line and the light beam convergent part normal is less than the critical angle of said collimation material that layer adopts.Light through the light beam convergent part partly is several portions by beam collimation, and every part light all is paraxial rays for the lens of correspondence.Total reflection can not take place on the standard lens surface partly through vertically collimation ejaculation of standard lens in middle low-angle; And angle part penetrates through inclination relay lens edge and vertical direction certain angle collimation on every side, can total reflection not take place on inclination relay lens surface.The light that promptly gets into aperture is all utilized, thereby has guaranteed high energy utilization rate.
As four of improvement: said light beam convergent part the bottom surface be covered with reflectance coating at aperture with exterior portions.This reflectance coating can reduce light loss, further improves the capacity usage ratio to area source.
Prior art is compared, and beneficial effect is:
On the one hand; When area source is arranged on the reflecting surface top and be positioned at the below, light beam convergent part bottom of micro collimating lens; The light part that light-emitting area is sent directly gets into aperture; A part repeatedly reflects the entering aperture through the bottom surface of light beam convergent part lower surface reflectance coating and micro collimating lens, thereby the light of area source is compiled, and is about to area source and converts spot light to.This mode light loss that compiles light is less.
On the other hand, the light beam convergent part of micro collimating lens can be restrained the light that gets into the light beam convergent part from aperture, wherein is positioned at the standard lens of the light directive beam collimation portion of aperture near axis, and penetrates through the planar section of microprism; Wherein departing from light in the aperture axis certain angle, to show the optical axis of the inclination relay lens of beam collimation portion greatly be the center; After this part light was further assembled through the inclination relay lens, the deflection of the prism rotating part of the microprism of process correspondence was adjusted and is penetrated with the approximate direction that is parallel to little axially bored line again.The light of last outgoing all penetrates to be roughly parallel to the aperture axis direction, and the collimation effect is better.
Therefore the present invention compared with prior art can obtain collimation effect and high energy utilization rate preferably simultaneously.
Description of drawings
Fig. 1 is the structural representation of embodiment one;
Fig. 2 is micro collimating lens and the micro-prism structure sketch map of embodiment one;
Fig. 3 is micro collimating lens and the microprism light path sketch map of embodiment one;
Fig. 4 is micro collimating lens and the microprism light path sketch map of embodiment two.
The specific embodiment
Embodiment one
As shown in Figure 1, the area source collimator apparatus of present embodiment comprises: reflector plate 1 and collimation layer that is successively set on this reflector plate 1 top 3 and correcting layer 4.These collimation layer 3 the selection of materials are PMMA, and refractive index is 1.49, and the critical angle of total reflection is 42.15 °, and it is periodically closely rearranged by a plurality of micro collimating lens 30.Correcting layer 4 is positioned on the collimation layer 3, and 3 strictness is aimed at the collimation layer.Correcting layer 4 is periodically closely rearranged by a plurality of microprisms 40.
As shown in Figure 2, this micro collimating lens 30 comprises light beam convergent part 31 and beam collimation portion 32; The bottom surface 311 of this light beam convergent part 31 is provided with aperture 312, and bottom surface 311 is covered with reflectance coating at aperture 312 with exterior portions; This beam collimation portion 32 is arranged on the top of this light beam convergent part 31, comprises standard lens 321 and one deck inclination relay lens 322 that is looped around these standard lens 321 peripheries, the aperture 312 of this light beam convergent part 31 of the centrally aligned of this standard lens 321;
As shown in Figure 2; This microprism 40 comprises the planar section 41 aimed at the standard lens of this micro collimating lens 30 321 and prism rotating part 42 corresponding with the inclination relay lens of this micro collimating lens 30 322 and that aim at, and this prism rotating part 42 is used for the light with these micro collimating lens 30 inclination relay lens 322 outgoing is roughly deflected to the axis direction of this aperture 312.
In this embodiment; Prism rotating part 42 and each layer micro collimating lens 30 are corresponding and aim at and be meant; If this micro collimating lens 30 comprises multilayer inclination relay lens 322; Then 42 of prism rotating parts have a plurality of parts corresponding with each layer inclination relay lens 322, and this various piece is aimed at each layer inclination relay lens 322.In addition, the optical axis coincidence of the axis direction of aperture 312 and this standard lens 321, and perpendicular to the planar section 41 of this microprism 40.
Like Fig. 2, shown in Figure 3, the operation principle of present embodiment is following:
Light-emitting area 2 is a lambert dignity light source; Place reflector plate 1 top, some gets into the collimation layer through aperture 312 light that light-emitting area is sent, and a part of in addition light is mapped on the aperture 312 peripheral reflective coatings; Be reflected back toward backlight, through getting into aperture 312 again after reflector plate 1 reflection.Repeat above process; The light that is sent by backlight finally gets into light beam convergent part 31 through aperture 312; Refraction through the PMMA material; The light angle that gets into light beam convergent part 31 is positive and negative 42 degree, less than the cirtical angle of total reflection of PMMA material, therefore gets into the not total reflection of portion's generation within it of light of the light beam convergent part 31 of micro collimating lens 30.Light gets into beam collimation portion 32 subsequently, and these light can be divided into two parts: the light in (1) positive and negative 14 degree gets into standard lens 321, total reflection phenomenon can not take place, the vertically collimation outgoing after standard lens 321 refractions of this part light; (2) light outside positive and negative 14 degree, these light get into inclination relay lens 322.Because the angle between the outer rim of the inclination relay lens 321 of present embodiment and aperture 312 outers between the normal of line and light beam convergent part 31 is less than the critical angle of collimation material that layer adopts; Promptly less than 42.15 °, so total reflection can not take place in this part light yet.Last light becomes 28 degree angular direction collimation outgoing in the edge with vertical direction after 322 refractions of inclination relay lens.
Light gets into after the correcting layer 4, and vertically the light of collimation outgoing does not reflect through planar section 41, keeps the direction of propagation constant, continues vertically outgoing.And the edge becomes the light of 28 degree angular direction collimation outgoing through prism rotating part 42 with vertical direction, reflects, and the direction of propagation changes, and becomes vertically collimation outgoing.
Last whole lambert's dignity light source becomes the collimated light outgoing through after this collimator apparatus.Because the light that gets into aperture 312 is all by collimation, capacity usage ratio is high, satisfies the requirement of subsequent optical system for high brightness, high collimation plane light source fully.
Embodiment two
The difference of present embodiment and embodiment one is: the collimation layer the selection of material of (1) present embodiment is F12 glass, and refractive index is 1.64; (2) as shown in Figure 4, there is two-layer inclination relay lens 322 ', 323 ' in the beam collimation portion of micro collimating lens, and the prism rotating part 42 ' of microprism has double-layer structure corresponding with this two-layer inclination relay lens 322 ', 323 ' and that aim at.
As shown in Figure 4; The operation principle of present embodiment is following: light-emitting area is that lambert dignity light source is placed the reflector plate top; Some gets into collimator apparatus through aperture the light that light-emitting area is sent; A part of in addition light is mapped on the aperture periphery reflective coating, is reflected back toward backlight, through getting into aperture again after the reflector plate reflection.Repeat above process, the light that is sent by backlight finally gets into the light beam convergent part through aperture, and through the refraction of F12 glass, the light angle that gets into the light beam convergent part is positive and negative 37.5 degree.Light gets into beam collimation portion subsequently, and these light can be divided into three parts: (1) angle of divergence is that the light in 7.5 degree gets into standard lens, total reflection phenomenon can not take place, light vertically collimation outgoing after the standard lens refraction; (2) dispersion angle is the ground floor 322 ' of the light entering inclination relay lens within 7.5 degree to 22.5 degree, and total reflection phenomenon does not take place, and the edge becomes 15 degree angular direction collimation outgoing with vertical direction after the refraction of this layer lens; (3) dispersion angle is the second layer 323 ' of the light entering inclination relay lens within 22.5 degree to 37.5 degree, and total reflection phenomenon does not take place, and the edge becomes 30 degree angular direction collimation outgoing with vertical direction after the refraction of this layer lens.
Light gets into after the correcting layer, and vertically the light of collimation outgoing does not reflect through planar section, keeps the direction of propagation constant, continues vertically outgoing.And the edge becomes the ground floor of the light of 15 degree angular direction collimation outgoing through prism rotating part 42 ' with vertical direction, reflects, and the direction of propagation changes, and becomes vertically collimation outgoing.And the edge becomes the second layer of the light of 30 degree angular direction collimation outgoing through prism rotating part 42 ' with vertical direction, reflects, and the direction of propagation changes, and becomes vertically collimation outgoing.
Whole lambert's dignity light source becomes the collimated light outgoing through after this collimator apparatus, and the collimation plane light source collimation of acquisition is high.Because the light that gets into aperture is all by collimation, capacity usage ratio is high, satisfies the requirement of subsequent optical system for high brightness, high collimation plane light source fully.
Claims (3)
1. area source collimator apparatus; It is characterized in that comprising: reflector plate and the collimation layer and the correcting layer that are successively set on this reflector plate top; This collimation layer adopts the close material of light, and it comprises some micro collimating lens, and this correcting layer comprises some microprisms of aiming at these some micro collimating lens;
This micro collimating lens comprises light beam convergent part and beam collimation portion; The bottom surface of this light beam convergent part is provided with aperture; This beam collimation portion is arranged on the top of this light beam convergent part, comprises standard lens and one or more layers inclination relay lens that is looped around this standard lens periphery, the aperture of this light beam convergent part of the centrally aligned of this standard lens;
This microprism comprises the planar section aimed at the standard lens of this micro collimating lens and prism rotating part corresponding with each layer inclination relay lens of this micro collimating lens and that aim at, and this prism rotating part is used for the light with this micro collimating lens inclination relay lens outgoing is roughly deflected to the axis side of this aperture;
Said area source is arranged between reflecting layer and the collimation layer, said light beam convergent part the bottom surface be covered with reflectance coating at aperture with exterior portions;
Angle between the outer rim of the outermost inclination relay lens of said micro collimating lens and the said aperture outer between line and the light beam convergent part normal is less than the critical angle of said collimation material that layer adopts.
2. area source collimator apparatus according to claim 1 is characterized in that: the standard lens of said micro collimating lens is its focal length of lens apart from the aperture distance; The inclination relay lens of said micro collimating lens is its focal length of lens apart from the aperture distance.
3. according to the described area source collimator apparatus of claim l, it is characterized in that: said collimation layer adopts glass material or PMMA material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010564539A CN102095161B (en) | 2010-11-30 | 2010-11-30 | Area light source collimation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010564539A CN102095161B (en) | 2010-11-30 | 2010-11-30 | Area light source collimation device |
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| Publication Number | Publication Date |
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| CN102095161A CN102095161A (en) | 2011-06-15 |
| CN102095161B true CN102095161B (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010564539A Expired - Fee Related CN102095161B (en) | 2010-11-30 | 2010-11-30 | Area light source collimation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102313246B (en) * | 2011-09-05 | 2013-12-04 | 广东威创视讯科技股份有限公司 | Area light source collimation device and light beam collimation method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1554982A (en) * | 2003-12-25 | 2004-12-15 | 上海交通大学 | Multiple light source lighting system for projector |
| CN101395424A (en) * | 2006-03-30 | 2009-03-25 | 日立麦克赛尔株式会社 | Direct underneath type backlight device, and optical lens sheet |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5098413B2 (en) * | 2007-04-20 | 2012-12-12 | 凸版印刷株式会社 | OPTICAL SHEET FOR DISPLAY, BACKLIGHT UNIT, AND DISPLAY DEVICE |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1554982A (en) * | 2003-12-25 | 2004-12-15 | 上海交通大学 | Multiple light source lighting system for projector |
| CN101395424A (en) * | 2006-03-30 | 2009-03-25 | 日立麦克赛尔株式会社 | Direct underneath type backlight device, and optical lens sheet |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2008-268607A 2008.11.06 |
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| CN102095161A (en) | 2011-06-15 |
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Address after: Kezhu road high tech Industrial Development Zone, Guangzhou city of Guangdong Province, No. 233 510670 Patentee after: VTRON GROUP Co.,Ltd. Address before: 510663 No. 6, color road, hi tech Industrial Development Zone, Guangdong, Guangzhou, China Patentee before: VTRON TECHNOLOGIES Ltd. |
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