CN102928991A - Light beam collimator - Google Patents
Light beam collimator Download PDFInfo
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- CN102928991A CN102928991A CN2012104333442A CN201210433344A CN102928991A CN 102928991 A CN102928991 A CN 102928991A CN 2012104333442 A CN2012104333442 A CN 2012104333442A CN 201210433344 A CN201210433344 A CN 201210433344A CN 102928991 A CN102928991 A CN 102928991A
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- 239000013307 optical fiber Substances 0.000 abstract description 9
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- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
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Abstract
The invention discloses a novel light beam collimator for collimating non-collimated light beams. The collimator is a circular table formed by transparent media, namely, formed by a cone by removing a small cone at the top. The light beams enter from a small circle and are output from a large circle. The upper and lower surfaces of the circular table are smooth, effective input and output are achieved, and the lateral side of the circular table is a smooth surface or coated with a high reflection metal film to achieve effective reflection for lights entering from the inside of the circular table to the lateral side of the circular table. The collimator can shape light beams with large divergence angles into light beams with small divergence angles and can be applied to sunlight collecting systems, laser beam collimation and the like; and therefore the collecting capacity of a follow-up condenser to the lights is effectively improved, and the problem that common condensers cannot effectively converge the lights into optical fibers for transmission due to large divergence angles of condensed lights is solved.
Description
Technical field
The present invention relates to the fields such as solar energy development, laser application, LED illumination, particularly sunlight optical fibre illuminator.
Background technology
In the systems such as solar collector, need the focusing systems such as scioptics or catoptron that light is assembled, thereby be input in the less transmission medium of optical fiber iso-cross-section.At present, general optical collector is comprised of a plurality of arrays, to realize efficient sunlight collecting.Adopt the high sensor that is formed by collector lens and four-quadrant photovoltaic detector such as patent of invention " sunlight optical fibre illuminator (CN01113529) ", realized stable, reliable sunshine tracking.And when adopting lens or catoptron that the parallel of sunshine or wide aperture or quasi-parallel light beam are assembled, although structure is more simple, caustic surface can be larger, if but focal beam spot producing more at a distance, then the whole system size can be very large, affects its actual use.If will closely produce focal beam spot, then the angle at focal position light beam and lens axis is very large, and the optically focused angle of optical fiber is little, and this just causes having part light to be coupled in the optical fiber., need to take effective measures, to reduce the angle of divergence of focused beam for this reason.
Summary of the invention
For above deficiency, the present invention proposes a kind of novel beam collimation device, the light beam after the line focus is collimated realizing, reduces the angle of divergence of light beam, is beneficial to the coupling of light beam or further light beam is focused on, to reduce spot size.。This collimating apparatus is a transparent round platform, generally is comprised of glass or polymeric material.The round platform outside surface is smooth surface, and its outside can add the thin metal layer that one deck has high reflective characteristic.
The beam collimation device that the present invention proposes can the angle of divergence is larger beam shaping be the light beam that has than small divergence angle, can be used for sunlight collection system, laser beam collimation etc.Thereby effectively improve follow-up condenser to the capacity gauge of light, solve common condenser because the light angle of divergence behind the optically focused is large and light effectively can't be converged to the shortcoming of transmitting in the optical fiber.
The technical scheme of beam collimation device of the present invention is: this collimating apparatus is a round platform, and namely the conicle by circular cone removal top forms.This collimating apparatus is used for uncollimated rays is carried out beam collimation.Light beam is entered by round platform upper base (1), from round platform go to the bottom (2) output.The round platform upper and lower surface is smooth surface, realizes effectively inputting, exporting, and frustum cone side (3) is for smooth surface or apply high anti-thin metal layer, with realization the light that is incided frustum cone side by round platform inside is effectively reflected.
The beam collimation device that the present invention proposes can the angle of divergence is larger beam shaping be the light beam that has than small divergence angle, can be used for sunlight collection system, laser beam collimation etc.Thereby effectively improve follow-up condenser to the capacity gauge of light, solve common condenser because the light angle of divergence behind the optically focused is large and light effectively can't be converged to the shortcoming of transmitting in the optical fiber.
Its ultimate principle is, the light beam with certain angle of divergence enters the upper surface of round platform (roundlet zone), reflects, and enters round platform, and the light beam less with the round platform axis angle will directly arrive great circle, and output.And the larger light beam of round platform axis angle then will arrive the side of round platform, and produce total reflection, because the side is circular conical surface, light beam after reflection and round platform axis angle will change.For a specific round platform, angle of divergence light beam within the specific limits effectively can be collimated.
As shown in Figure 1, for cylindrical transparent medium rod, the light that enters of bottom surface from it, its incident angle is identical with emergence angle.Therefore, this dielectric rod does not have collimating effect to light beam.
The beam collimation device that the present invention proposes is a round platform, as shown in Figure 2.Be that it is to remove the transparent medium rod that the conicle at top forms by a circular cone.Light beam is entered by round platform upper base 1, from round platform go to the bottom 2 output.Round platform up and down basal surface is smooth surface, realizes effectively inputting, exporting, and frustum cone side 3 is for smooth surface or apply high anti-thin metal layer, with realization the light that is incided frustum cone side by round platform inside is effectively reflected.And for round platform, when the light in certain angular range from the incident of round platform upper base, after conical outer surface reflection, when round platform was gone to the bottom output, its incident angle can reduce again.
Describe for convenient, provide to give a definition.
The upper base radius, the radius of round platform upper base border circular areas is used a
1Expression.
The radius of going to the bottom: the go to the bottom radius of border circular areas of round platform, use a
2Expression.Here, a
1A
2
Round platform axis: the line in the upper base center of circle and the center of circle of going to the bottom.
Frustum cone height: the distance between upper base and the center of circle of going to the bottom represents with h.
Round platform is trapezoidal: the surperficial tangent formation of plane and round platform trapezoidal of passing upper base and the center of circle of going to the bottom.
Round platform waist: refer to the waist that round platform is trapezoidal.
The round platform angle: the base angle that round platform is trapezoidal represents with θ.
The round platform inclination angle: the angle of round platform waist and round platform axis represents γ=90 °-θ with γ.
The angle of divergence: the maximum angle between incident ray and the round platform axis represents with α '.
Angle of divergence light: incident angle equals the incident ray of the angle of divergence.
The interior angle of divergence: angle of divergence light enters round platform by the round platform upper base, and after refraction, the angle of light and round platform axis represents with α.
Interior output angle: when incident ray arrived under the round platform basal surface, the maximum angle of light and round platform axis represented with β.
Output angle: when incident ray arrives under the round platform basal surface, equal the light of β with the angle of round platform axis, when round platform was gone to the bottom refraction output, the angle of output light and round platform axis represented with β '.
The round platform refractive index: the refractive index of round platform composition material, use n
1Expression.Obviously, α＞β, α=arcsin (sin (α ')/n
1), β '=arcsin (n
1Sin (β)).
Further, interior angle of divergence alpha, interior output angle β, and should satisfy between the round platform tilt angle gamma: γ≤β and α-2 γ≤β.α＞β is obviously arranged.In the better situation, should have: interior angle of divergence alpha, interior output angle β, and satisfy between the round platform tilt angle gamma: β=γ, γ=α/3.
Further, require frustum cone height h 〉=a
1Sin (θ) sin (90 °-α)/and sin (α-γ).
Further, require frustum cone height h≤1.05a
1Sin (θ) sin (90 °-α)/and sin (α-γ).
Beneficial effect of the present invention: the light beam that the beam collimation device that the present invention proposes can be larger with the angle of divergence, collimation is the less light beam of the angle of divergence, and keep its less spot size, be conducive to that follow up device is incorporated into light in the transmission system such as optical fiber or in Laser Processing etc. is used.Owing to can reduce the angle of divergence, so that in front end system, can use the devices such as the lens of high focusing power or catoptron, reduce system dimension and complexity.
Description of drawings
The transmission synoptic diagram of Fig. 1 light in right cylinder;
Fig. 2 frustum cone structure synoptic diagram; Wherein, 1 is the round platform upper base, and 2 go to the bottom for round platform, and 3 is frustum cone side.
Trapezoidal and the correlation parameter synoptic diagram of Fig. 3 round platform.
Embodiment
The collimating apparatus that the present invention proposes is a round platform, and namely the conicle by circular cone removal top forms.This collimating apparatus is used for uncollimated rays is carried out beam collimation.Light beam is entered by round platform upper base 1, from round platform go to the bottom 2 output.The round platform upper and lower surface is smooth surface, realizes effectively inputting, exporting, and frustum cone side 3 is for smooth surface or apply high anti-thin metal layer, with realization the light that is incided frustum cone side by round platform inside is effectively reflected.
For realizing the effective collimation to light beam, the selection of round platform tilt angle gamma is relevant with the interior output angle β of interior angle of divergence alpha and requirement.Angle of divergence alpha namely, interior output angle β, and should satisfy between the round platform tilt angle gamma: γ≤β and α-2 γ≤β.Reason is: when light from the incident of round platform upper base, through when refraction, if its refraction angle is γ, obviously, at this moment, light can not arrive frustum cone side, goes to the bottom but directly arrive round platform, and output.Therefore, interior output angle β can less than the round platform tilt angle gamma, namely not have γ≤β.On the other hand, enter round platform if the refraction angle is the incident light of ω by the round platform upper base, and arrive frustum cone side, after reflection, arrive round platform and go to the bottom.Supposing to arrive light when going to the bottom and the angle of round platform axis is ψ.Obviously, ψ=ω-2 γ.When ω=α, arrive the angle maximum of light and round platform axis when going to the bottom, be α-2 γ.Therefore, interior output angle satisfies β 〉=α-2 γ.To sum up, (alpha-beta)/2≤γ≤β should be arranged.If in fact (alpha-beta)/2＞β is arranged, then this collimating apparatus can't realize.For example, if α=45 °, and require β=10 °, then there be (alpha-beta)/2=17.5 °, (alpha-beta)/2＞β is namely arranged, adopt structure of the present invention to realize.
Obviously, when γ=α-2 γ, (alpha-beta)/2=γ=β, interior output angle β has minimum value.Therefore, the refraction angle of divergence alpha, interior output angle β, and the best relation between the round platform tilt angle gamma is: γ=α/3, β=γ.
Because for the light of refraction angle ω greater than the round platform tilt angle gamma, light need to be through the frustum cone side reflection once, with reduce that it arrives that round platform goes to the bottom the time and the angle ψ of round platform axis.If light is by the edge incident of round platform upper base, the frustum cone height that need this moment is the highest, and the height h of corresponding round platform should satisfy h 〉=dsin (θ), here d=a
1Sin (90 °-α)/(α-γ) is that the trapezoidal waist of round platform is long to sin.Height h 〉=a that round platform namely should be arranged
1Sin (θ) sin (90 °-α)/and sin (α-γ).
On the other hand, frustum cone height h value is larger, and the surface area that round platform is gone to the bottom is also larger.Thereby cause the facula area of output beam to increase.This is unfavorable for the collection to light beam.For this reason, frustum cone height h≤1.05a should be arranged
1Sin (θ) sin (90 °-α)/and sin (α-γ).
Embodiment 1
Round platform is comprised of pure quartz, and the surface is smooth surface, roundlet radius a
1=10mm, round platform tilt angle gamma=13.3 °, frustum cone height h=16.6mm.Can be with the light beam of interior angle of divergence alpha=40 ° (angle of divergence alpha '=68.8 °), collimate the collimated light beam into interior emergence angle β=13.3 ° (output angle β '=19.5 °).Large radius of circle a
2=13.9mm, namely facula area only increases 93%.
Round platform is comprised of pure quartz, and the side applies through the argent thin layer, roundlet radius a
1=15mm, round platform tilt angle gamma=9 °, frustum cone height h=21mm.Can be with the light beam of interior angle of divergence alpha=30 ° (angle of divergence alpha '=46.5 °), collimate the collimated light beam into interior output angle β=12 ° (output angle β '=17.6 °).Large radius of circle a
2=18.3mm, namely facula area only increases 49%.
Round platform is comprised of polymeric material, and the surface is smooth surface, roundlet radius a
1=20mm, round platform tilt angle gamma=10 °, frustum cone height h=30mm.Can be with the light beam of interior angle of divergence alpha=30 ° (angle of divergence alpha '=48.2 °), collimate the collimated light beam into interior output angle β=10 ° (output angle β '=15 °).Large radius of circle a
2=25.3mm, namely facula area only increases 60%.
Above-mentioned accompanying drawing only is explanatory view, protection scope of the present invention is not formed restriction.Should be understood that these embodiment just in order to demonstrate the invention, but not limit the scope of the invention by any way.
Claims (4)
1. beam collimation device is characterized in that: the round platform of this collimating apparatus for being formed by transparent medium, light beam is entered by round platform upper base (1), from round platform go to the bottom (2) export; The round platform upper and lower surface is smooth surface, and frustum cone side (3) is for smooth surface or apply high anti-thin metal layer; And satisfy: γ≤β and α-2 γ≤β, wherein:
αThe angle of divergence in the expression: refer to that angle of divergence light enters round platform by the round platform upper base, after refraction, the angle of light and round platform axis,
β represents interior output angle: refer to that incident ray enters round platform by the round platform upper base, and when finally arriving under the round platform basal surface, the maximum angle of light and round platform axis;
γ represents the round platform inclination angle: the angle that refers to round platform waist and round platform axis.
2. according to claims 1 described beam collimation device, it is characterized in that: frustum cone height
hWith the upper base radius
a 1With the interior angle of divergence
α, the relation between the round platform tilt angle gamma satisfies:
h〉=a
1Sin (θ) sin (90 °-α)/and sin (α-γ); Wherein θ refers to the base angle that round platform is trapezoidal.
3. according to claims 2 described beam collimation devices, it is characterized in that: frustum cone height
h≤ 1.05a
1Sin (θ) sin (90 °-α)/and sin (α-γ).
4. according to claims 1 described beam collimation device, it is characterized in that: interior angle of divergence alpha, interior output angle β, and satisfy between the round platform tilt angle gamma: β=γ, γ=α/3.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210433344.2A CN102928991B (en) | 2012-11-01 | 2012-11-01 | Light beam collimator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210433344.2A CN102928991B (en) | 2012-11-01 | 2012-11-01 | Light beam collimator |
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| Publication Number | Publication Date |
|---|---|
| CN102928991A true CN102928991A (en) | 2013-02-13 |
| CN102928991B CN102928991B (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201415A (en) * | 2006-12-15 | 2008-06-18 | 鸿富锦精密工业（深圳）有限公司 | Light guide lens and LED containing the same |
| CN201600339U (en) * | 2010-01-20 | 2010-10-06 | 纳优科技（北京）有限公司 | Filtering collimator combined device of X-ray fluorescence spectrometer |
| CN102313244A (en) * | 2011-09-09 | 2012-01-11 | 中国科学院宁波材料技术与工程研究所湖州新能源产业创新中心 | Light emitting diode (LED) lamp optical lens |
-
2012
- 2012-11-01 CN CN201210433344.2A patent/CN102928991B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201415A (en) * | 2006-12-15 | 2008-06-18 | 鸿富锦精密工业（深圳）有限公司 | Light guide lens and LED containing the same |
| CN201600339U (en) * | 2010-01-20 | 2010-10-06 | 纳优科技（北京）有限公司 | Filtering collimator combined device of X-ray fluorescence spectrometer |
| CN102313244A (en) * | 2011-09-09 | 2012-01-11 | 中国科学院宁波材料技术与工程研究所湖州新能源产业创新中心 | Light emitting diode (LED) lamp optical lens |
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|---|---|
| CN102928991B (en) | 2014-10-29 |
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Address after: 211200 Jiangsu Province, Lishui District Yong Yang Town Bridge Road, No. 688 Applicant after: Jiangsu University Address before: 212013 Zhenjiang City, Jiangsu Province University Road, No. 301 Applicant before: Jiangsu University |
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Address after: 212114 Zhenjiang, Zhejiang Province, Dantu high capital street, Xiangshan Road, No. 1 Patentee after: Jiangsu University Address before: 211200 Jiangsu Province, Lishui District Yong Yang Town Bridge Road, No. 688 Patentee before: Jiangsu University |
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Effective date of registration: 20171120 Address after: 212100 Zhenjiang province Jiangsu city Dantu District Shangdang ecological Automobile Industrial Park No. 8 Patentee after: JIANGSU HUIZHI INTELLECTUAL PROPERTY SERVICES CO., LTD. Address before: 212114 Zhenjiang, Zhejiang Province, Dantu high capital street, Xiangshan Road, No. 1 Patentee before: Jiangsu University |
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Effective date of registration: 20191223 Address after: 225200 No. 88 Wenchang East Road, Jiangdu District, Yangzhou, Jiangsu. Patentee after: Yangzhou (Jiangdu) New Energy Automobile Industry Research Institute of Jiangsu University Address before: 212100 Zhenjiang province Jiangsu city Dantu District Shangdang ecological Automobile Industrial Park No. 8 Patentee before: JIANGSU HUIZHI INTELLECTUAL PROPERTY SERVICES CO., LTD. |
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