WO2010133183A1 - Led光源的非成像光学定向配光透镜 - Google Patents

Led光源的非成像光学定向配光透镜 Download PDF

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Publication number
WO2010133183A1
WO2010133183A1 PCT/CN2010/073065 CN2010073065W WO2010133183A1 WO 2010133183 A1 WO2010133183 A1 WO 2010133183A1 CN 2010073065 W CN2010073065 W CN 2010073065W WO 2010133183 A1 WO2010133183 A1 WO 2010133183A1
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Prior art keywords
light
light source
lens
led light
imaging optical
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PCT/CN2010/073065
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English (en)
French (fr)
Inventor
胡家培
胡民海
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西安智海电力科技有限公司
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Publication of WO2010133183A1 publication Critical patent/WO2010133183A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention belongs to the field of non-imaging optical light distribution technology, and has non-imaging optical orientation matching with an LED light source.
  • Functional lighting fixtures such as street lamps and tunnel lights require that the illumination at every point in the illumination range must meet the minimum illumination index, the highest glare requirement index, the light intensity uniformity indicator, and the illumination area limitation requirements required by the lighting specification. And energy saving, environmental performance and other requirements are also very high.
  • the luminaire In order to improve the lighting effect and protect the health of the human eye, it is necessary to use the luminaire to illuminate the optical system, that is, to illuminate a light field with uniform illumination in a given listening position and a given road surface area. Light outside a given area is considered invalid light.
  • the light distribution of traditional lighting fixtures mainly relies on the reflection of light distribution by the inch cup, which controls the light within a reasonable prescribed area and improves the uniformity of light intensity.
  • the main disadvantage of this method of distributing light intensity by reflection is that the light energy loss is large and the power consumption is large.
  • the package of common LED light source is shown in Figure 1.
  • the light intensity distribution E is proportional to the cosine of the light exit angle ⁇ ', and the illuminance E formed by the light emitted from the LED light source dish on the illuminated surface is rapidly attenuated as the exit angle ⁇ increases.
  • the LED light source 101 can be regarded as a Lambertian characteristic light source with a 180 degree angle of light.
  • the intensity distribution is center strong and the periphery is weakened, as shown in Fig. 2. If the secondary optical design of the characteristics of the LED light source is not performed, such a light intensity distribution ⁇ meets the needs of functional lighting applications, and the presence of a large amount of ineffective light not only causes a large loss of light energy, but also greatly reduces the lighting effect.
  • the following is the analysis of the conic surface intensity distribution curve at the maximum intensity of existing LED street light fixtures:
  • Figure 3 shows the measured light distribution curve of a 240W symmetrical unsuitable LED street light, which shows that a considerable portion of the light leaks out of the effective area beach 102.
  • the results show that the ineffective light greatly reduces the lighting effect.
  • the power output can only be increased to 240W, resulting in wasted energy.
  • Figure 4 shows the measured light distribution curve of a 150W butterfly type LED street light. The results show that the uniformity of the illumination is poor, there is glare along the illuminated surface, and there is a blind spot in the illuminated area.
  • LED light sources are generally classified into two types: single light source and multiple light source.
  • Multi-source LED lighting fixtures the light distribution is adjusted by adjusting the installation angle of a plurality of light sources; li distribution, the formed lighting fixtures are modular. Multi-source luminaires are not only heavy, but also create multiple shadows, limiting The power expansion and scope of use are particularly serious safety hazards for vehicles and pedestrians.
  • the light distribution is mainly to imitate the traditional lamps, relying on the reflector cup to reflect the light distribution. Due to the presence of Lambertian's characteristics, the reflector can have very little light, and it is impossible to fundamentally improve the intensity of the center of the LED light source and the characteristics of the periphery.
  • the object of the present invention is to provide a non-imaging optical orientation of an LED light source, which solves the problem that the prior art cannot fundamentally improve the Lambertian characteristic of the LED light source, thereby failing to achieve directional light distribution, resulting in poor uniformity of light distribution.
  • Technical problems with low light efficiency are to provide a non-imaging optical orientation of an LED light source, which solves the problem that the prior art cannot fundamentally improve the Lambertian characteristic of the LED light source, thereby failing to achieve directional light distribution, resulting in poor uniformity of light distribution.
  • the present invention overcomes the Lambertian characteristic of the LED light source by the use of light from the light-tight substance to the refraction of the light-scattering substance, that is, the characteristic that the center of the light intensity distribution is strong and the periphery is weakened.
  • the energy of the directional refracting non-imaging device of the invention is redistributed, and the light emitted by the LED light source is shaped and changed to realize the full utilization of the light energy and the directional control of the light intensity distribution, so that the LED point
  • the light source becomes a uniform surface light source on the surface of the lens.
  • the incident surfaces 201 arranged in a tooth shape as described above are generally arranged on the same reference surface, and the reference surface may be a flat surface or a curved surface.
  • the exit surface 202 described above may be a flat surface or a curved surface.
  • the incident surface 201 described above may also be a flat surface or a curved surface.
  • the lens body 203 described above may be a glass material, a PS material, a PC material or a tantalum material.
  • the incident surface 201 and the exit surface 202 described above may be continuous curved surfaces having inflection points or no inflection points.
  • the incident surface 201 and the exit surface 202 described above may be intermittent curved surfaces.
  • the light collection angle is large, and the light energy of the LED light source can be fully utilized, and the light efficiency is high, and the power required for the actual 33 ⁇ 4 illumination requirement is small, so energy can be saved.
  • Figure 1 shows the packaging of existing LED light sources.
  • Figure 2 shows a Lambertian source with an LED source equivalent to a 180° exit angle.
  • Figure 3 shows the measured light distribution curve of the existing 240W symmetrical type without suitable light distribution LED street light.
  • Figure 4 shows the measured light distribution curve of the existing 150W butterfly type light distribution LED street light.
  • Figure 5 is a schematic optical view of a directional refractive plane of the present invention.
  • Fig. 6 is a schematic view showing the refracting of the astigmatic astigmatism of the present invention.
  • Fig. 7 is a schematic view showing the refracting of the directional beam of the present invention.
  • Figure 8 is a schematic view showing the orientation of the belt mirror of the present invention.
  • Figure 9 is a schematic view showing the structure of a directional refractive light distribution lens of the present invention designed by Pro/Engineer software.
  • Figure 10 is a LightTools software simulation cone-shaped light intensity diagram of a conventional symmetrical LED street light without proper light distribution.
  • Figure 11 is a LightTools software simulation of a conical surface intensity map of an LED street light using the directional refracting lens of the present invention.
  • Figure 12 is a LightTools software simulation light distribution curve of an LED street light using the directional refractive light distribution lens of the present invention.
  • Figure 13 is a schematic diagram of an engineering application of a simulated LED street lamp using the directional refractive light distribution lens of the present invention.
  • Fig. 14 is a light distribution diagram of the LED street lamp of the directional refractive non-imaging optical lens of the present invention.
  • Figure 15 is a measured light distribution curve of an LED street lamp using the directional refractive non-imaging optical lens of the present invention.
  • Figure 16 is a comparison of LED street lights of the same power, same light source, and different lens conditions.
  • Figure 17 is a measured light distribution curve of an LED street lamp using a directional refractive non-imaging optical lens of the present invention. detailed description
  • Nm and Nn are the refractive indices of the two media, respectively, and ⁇ m and ⁇ n are the incident angle and the refraction angle, respectively.
  • the refractive index N1 of the incident medium of the matching mirror, the refractive index N2 of the mirror, the emission rate of the LED light after passing through the light distribution lens, and the incident angle of the LED light incident on the lens ⁇ 1.
  • N3sin ⁇ 4 N2sin ⁇ 3
  • Directional astigmatism of the light distribution lens As shown in Fig. 6, after the LED light of the Lambertian light source equivalent to the exit angle of 180° passes through the directional astigmatic toothed lens, the light will be perpendicular and off center from the tooth profile.
  • the direction of refraction which can change the distribution of the light field, increase the intensity of the refracting direction, reduce the light intensity in other directions, and perform uniform optical processing.
  • Light distribution lens strip-shaped astigmatic refracting As shown in Fig. 8, the LED light of the Lambertian source, which can be equivalent to the 180° exit angle, passes through the toothed oriented strip-shaped refractive lens, and the light will be oriented toward The tooth shape is refracted in the vertical strip direction, so that the light field is distributed into a band-shaped opening dog, and the light intensity is increased in the strip direction, and the light intensity is weakened in other directions, and the light uniform processing can also be performed.
  • the lens body 203 of the present invention has an incident surface 201 and an exit surface 202.
  • the incident surface 201 is an LED light incident surface, and the incident surface 201 can be a flat surface or a curved surface.
  • the incident surfaces 201 are arranged in a tooth shape; the incident surfaces 201 arranged in a tooth shape are generally arranged on the same reference surface, and the reference surface may be a flat surface or a curved surface.
  • the exit surface 202 can be a flat or curved surface.
  • the incident surface 201 and the exit surface 202 may be continuous curved surfaces having inflection points or no inflection points, or may be intermittent surfaces.
  • the lens body 203 of the present invention may be a glass material, a PC material or a tantalum material or the like.
  • the glass material has the characteristics of high temperature resistance and high penetration rate.
  • PC material is polycarbonate material
  • PMMA material is polymethyl methacrylate material. These two materials not only have high penetration rate, but also easy to achieve aspherical concentrating, yellow spot of spot light 3 » can also make product injection Forming, making production costs lower.
  • the lens body 203 can also be made of a transparent PS material, that is, a transparent polystyrene material, commonly known as benzene.
  • the invention combines the directional refraction matching mirrors in different directions to distribute the light intensity distribution of the S-inch light source of the LED light source, so that the light intensity distribution can meet the practical application requirements.
  • Figure 9 shows the directional refracting of LED luminaires designed with Pro/Engineer software, and its light intensity distribution fully meets the requirements of road illumination intensity distribution.
  • the 3 ⁇ 4W roadside and the house edge are fused and compressed by the useless light intensity distribution, and the useful light intensity distribution along the road direction is refracted, and uniform optical processing is performed at the same time.
  • Figure 10 is a symmetrical type of light-free LED street light.
  • LightTools software simulates a conical surface intensity map with a symmetrical circular shape and a strong central light intensity. The radial intensity is attenuated by the cosine-shaped legs. Most of the ⁇ exposure to the center, the surrounding light intensity is very weak.
  • 11 is a light intensity diagram of a conical surface of an LED street light LightTools software using the directional refractive light distribution lens of the present invention, wherein the open dog is approximately rectangular, the light intensity is uniform in the rectangular region, and the light intensity distribution is uniform from the center of the rectangle to the periphery. .
  • Figure 12 is a simulation of the light distribution curve using the directional refracting light distribution lens LED street light LightTools software of the present invention.
  • the light exit angle at 40% light intensity is:
  • Figure 13 is an engineering application for simulating LED streetlights using the directional refracting lens of the present invention:
  • the light intensity distribution of the street light S-inch to the road surface is approximately rectangular, and the ratio of the long CO of the rectangle to the width C90 is 2.41.
  • a directional refracting non-imaging light distribution lens redistributes the energy of the light, and changes the ship's surface and the light emitted by the LED light source, thereby realizing the directional control of the light source energy and the light intensity distribution.
  • the light of the LED light source is oriented to be refracted to the surface of the lens, so that the LED point light source is changed into a uniform surface light source on the lens surface, thereby improving the uniformity of light intensity distribution; changing the Lamber of the LED light source
  • the characteristic makes the strong distribution of the LED road light have less attenuation with the increase of the exit angle; the structure is simple, the collected light angle is large, and the light energy utilization rate is high.
  • the measured 150W directional refractive non-imaging optical lensing LED street light distribution curve shown in Figure 17 is analyzed. The result is: good illumination uniformity, no glare along the road surface, high illumination efficiency, and low power required to achieve lighting requirements.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

LED光源的非成像光学定向配^ t镜 技术领域
本发明属于非成像光学配光技术领域， 具搬及一种 LED光源的非成像光学定向配 耀竟
背景技术
路灯、 隧道灯等功能性照明灯具， 要求照明范围内每一点的照度都必须满足照明规 范要求的最低照度指标、 最高眩光要求指标、 光强均匀度指标以及光照区域限制要求， 对产品的可靠性及节能、 环保性能等要求也很高。 为了提高照明效果， 保护人眼睛的健 康， 必须利用灯具进行光学系统照明配光， 即在一个给定的聽各位置和给定的路面区域 内， 由灯光照射形成一个照度均匀的光场， 照射到给定区域之外的光被视为无效光。
传统照明灯具的配光主要是依靠 寸杯对光线进行反射分配， 将光线控制在合理的 规定区域内， 并提高光强的均匀度。 这种通过反射进行光强分配的方法， 其主要缺点是 光能损失大、 耗电量大。
常见 LED光源的封装如图 1所示。 其光强分布 E与出光角 θ ' 的余弦成正比， LED 光源皿所发出的光线在被照表面上所形成的照度 E随出射角 Θ , 的增大而迅速衰减。 LED光源 101可看作是一种 180度角度出光的具有朗伯 （Lambertian)特性光源， 光强 分布是中心强、 周边减弱， 如图 2所示。 如果不对 LED光源的特性进行二次光学设计， 这样的光强分布飾隹满足功能照明用途的需求， 大量无效光的存在不仅使光能损失大， 也大大地降低了照明效果。 以下是现有的 LED路灯灯具最大光强处圆锥面光强分布曲线 分析：
图 3为实测的 240W对称型无适当配光 LED路灯的配光曲线，其显示有相当一部分光 能泄漏到有效区灘 102以外。 结果表明无效光大大地降低了照明效果。 为实现照明要 求， 只能将光源出功率提高至 240W, 造成能源浪费。
图 4为实测的 150W蝶型配光 LED路灯的配光曲线。其显示结果表明照明的均匀度很 差， 沿照射面有眩光， 照射区域内有盲区。
LED光源一般分为单光源和多光源二类。
现有多光源 LED照明灯具， 其配光是通过调整众多光源的安装角度对光强进行； li 分配， 形成的照明灯具是模组型的。 多光源灯具不仅重量重， 而且产生了多重影， 限制 了功率扩展和使用范围， 尤其对车辆和行人是严重的安全隐患。
现有单光源 LED照明灯具， 其配光主要是模仿传统灯具， 依靠反射杯对光线进行反 射分配。 由于朗伯（Lambertian)特性的存在， 反光杯可以 寸的光线很少， 无法从根 本上改善 LED光源光强分布中心强、 周边 ¾的特性。
发明内容
本发明的目的在于提供一种 LED光源的非成像光学定向配雄竟， 其解决了现有技 术无法从根本上改善 LED光源的朗伯特性，从而不能实现定向配光，导致配光均匀度差、 光效低的技术问题。
本发明的技术方案如下：
本发明禾 U用光线从光密物质到光疏物质的折射 »， 来克服 LED光源的朗伯特性， 即光强分布中心强、 周边减弱的特性。 本发明 1定向折射非成像配^ t!M LED光源 的能量进行重新分配， 对 LED光源所发出的光进行整形、 改变， 以实现光能的充分利用 和光强分布的定向控制， 使 LED点光源变为透镜表面均匀的面光源。 其实现歩骤如下： 一种 LED光源的非成像光学定向配^ f镜， 包括透镜体 203， 该透镜体 203具有入 射面 201和出射面 202， 其特殊之处在于： 所述的入射面 201为 LED光线入射面， 所述 的入射面 201排列为齿形； 所述的入射面 201与出射面 202的夹角 θ =0〜90° 。
以上所述排列为齿形的入射面 201—般排列于同一基准面上， 该基准面可为平面或 曲面。
以上所述的出射面 202可为平面或曲面。
以上所述的入射面 201亦可为平面或曲面。
以上所述的透镜体 203可采用玻璃材料、 PS材料、 PC材料或 ΡΜΜΑ材料等。
以上所述的入射面 201、 出射面 202可以是具有拐点或无拐点的连续曲面。
以上所述的入射面 201、 出射面 202也可以是断续曲面。
本发明具有如下优点：
1.收集光线角度大， 能充分利用 LED光源的光能， 光效高， 实3¾照明要求所需要的 功率小， 因此可节能。
2.可对 LED光源的光强分布定向控制， 使 LED点光源变成透镜表面均匀的面光源， 配光均匀度高， 可实现精密光分布控制。
3.改变了 LED光源的朗伯特性， 使 LED光源的光强分布随着出射角度增大的衰减较 小， 适用于各类功能性照明灯具， 产品的可靠性高。
4.可以使照明范围内每一点的照度都完全满足照明规范要求，即满足最低照度指标、 最高眩光要求指标、 光强均匀度指标以及光照区域限制要求等。
5.照射区域内无盲区、 无眩光， 环保， 利于人眼睛健康。
6.结构简单， 成本低。
附图说明：
图 1为现有常见 LED光源的封装方式。
图 2为 LED光源等效为 180° 出光角的朗伯（Lambertian)光源。
图 3为实测的现有 240W对称型无适当配光 LED路灯的配光曲线。
图 4为实测的现有 150W蝶型配光 LED路灯的配光曲线。
图 5是本发明的定向折射平面光学示意图。
图 6是本发明配 ^it镜定向散光折射示意图。
图 7是本发明配^ t镜定向束光折射示意图。
图 8是本发明配艇镜定向带状折射示意图。
图 9是用 Pro/Engineer软件设计的本发明定向折射配光透镜的结构示意图。
图 10是现有的对称型无适当配光的 LED路灯的 LightTools软件仿真圆锥面光强 图。
图 11是使用本发明定向折射配光透镜的 LED路灯的 LightTools软件仿真圆锥面光 强图。
图 12是使用本发明定向折射配光透镜的 LED路灯的 LightTools软件仿真配光曲线。 图 13是使用本发明定向折射配光透镜模拟仿真 LED路灯的工程应用示意图。
图 14是实测的棚本发明定向折射非成像光学配 ^it镜的 LED路灯的光分布图。 图 15是实测的使用本发明定向折射非成像光学配光透镜的 LED路灯的配光曲线。 图 16是同功率、 同光源、 不同透镜条件的 LED路灯的对比图。
图 17是实测 150W使用本发明定向折射非成像光学配光透镜的 LED路灯的配光曲线。 具体实施方式
本发明配光透镜的定向折射原理：
(1. 1)斯涅尔定律：光入射到不同介质的界面上会发生反射和折射。其中入射光和折 射光位于同一个平面上， 并且与界面法线的夹角满足下列关系： 斯涅尔公式 Nmsin Θ m=Nnsin θ η，
其中 Nm和 Nn分别是两个介质的折射率， Θ m和 θ n分别是入射角和折射角。
(1.2)配 ^if镜定向折射原理：
如图 5所示， 配^ t镜的入射介质折射率 Nl、配^ t镜折射率 N2、 LED光线经配光 透镜后的出射介 f射率 N3; LED光线入射至配 镜的入射角 Θ 1、 射入配 镜后 的折射角 Θ 2、 出射至出射介质的入射角 Θ 3、经配^ t镜后的出射角 Θ 4； 配 竟的 入射面 201与出射面 202的夹角 Θ。透镜体 203的折射率 N2=l.56；透镜体 203的入射 介质、 出射介质均为空气， 贝 IJ入射介质折射率 Nl =出射介质折射率 N3=l。
当 LED光源的光线从空气入射至透镜体 203时， N2>N1; 贝 ij Θ1〉Θ2， 光线发生偏 向法线的折射； 当光线从纖体 203射入空气中时， Ν2>Ν3, 则 Θ4〉Θ3， 光线发生偏 离法线的折射， 其偏离法线， 定向折射的角度为 Θ 4。
··· Θ 1= Θ，
Nlsin61-N2sin62
sin Θ 2=Nlsin θ 1/ Ν2
θ 2=sin- 1 (Nlsin θ 1/ Ν2) =sin- 1 (Nlsin θ / N2)
Θ3= Θ1- Θ2= θ- Θ2= θ - sin- 1 (Nlsin θ / Ν2)
N3sin θ 4=N2sin θ 3
sin θ 4=N2sin θ 3/ Ν3
94=sin- l(N2sin93/ Ν3)
g卩 94=sin— l(N2sin (Θ- sin— 1 (Nlsin Θ/ N2)/ N3) )
若 θ =30。
则 94=sin-l (1.56sin (30。 - sin- 1 (sin30。 /1.56) ) )=18。
(1.3)配光透镜定向散光折射： 如图 6所示， 可等效为 180° 出光角的朗伯光源的 LED光线穿过定向散光齿形透镜后， 光线会朝向和齿形垂直且偏离中心的方向折射， 由 此可改变光场分布开 犬， 使折射方向光强提高， 其他方向光强减弱， 还可进行均匀翻寸 光学处理。
(1.4)配光透镜定向束光折射： 如图 7所示， 可等效为 180° 出光角的朗伯光源的 LED光线穿过定向束光齿形透镜后， 光线会朝向和齿形垂直且向着中心的方向折射， 由 此可改变光场分布开 犬， 使折射方向光强提高， 其他方向光强减弱， 还可对照射至有效 照明区域以夕卜的舰行折射压缩及光均匀处理。
(1. 5)配光透镜带状定向散光折射：如图 8所示，可等效为 180° 出光角的朗伯光源 的 LED光线穿过齿形定向带状折射透镜后， 光线会朝向和齿形垂直带状方向折射， 使光 场分布成带状开 犬， 在带状方向光强提高， 其他方向光强减弱， 还可进行光均匀处理。
参见图 5， 本发明具体结构如下：
本发明透镜体 203具有入射面 201和出射面 202。 入射面 201为 LED光线入射面， 入射面 201可为平面或曲面。 入射面 201排列为齿形； 排列为齿形的入射面 201一般排 列于同一基准面上，该基准面可为平面或曲面。出射面 202可为平面或曲面。入射面 201 与出射面 202的夹角 θ =0〜90° 。 入射面 201、 出射面 202可以是有拐点或无拐点的 连续曲面， 也可以是断续曲面。
本发明透镜体 203可采用玻璃材料、 PC材料或 ΡΜΜΑ材料等。玻璃材料具有耐高温、 穿透率高等特点。 PC材料即聚碳酸酯材料， PMMA材料即聚甲基丙烯酸甲酯材料，此两种 材料不仅穿透率较高， 容易实现非球面聚光， 光斑的黄暈斑 3»， 还可以使产品注 塑成型， 使生产成本较低。 透镜体 203也可以采用透明 PS材料， 即透明聚苯乙烯材料， 俗称透苯。
用本发明定向折射非成像光学配光透镜的模拟仿真照明灯具实例：
禾 U用本发明对不同方向的定向折射配 ^if镜进行组合， 对 LED光源的 S寸光光强分 布进行配光， 可使光强分布满足实际应用要求。
图 9是用 Pro/Engineer软件设计的 LED灯具定向折射配光 «，其光强分布完全满 足道路照明光强分布的要求。 根据道路? ¾W路边、 屋边以夕卜无用部分光强分布进行折 射压缩， 对道路沿伸方向的有用光强分布进行折射增强， 同时进行均匀 !¾!寸光学处理。
而图 10是对称型无适当配光 LED路灯 LightTools软件仿真圆锥面光强图，其形状 为对称圆形， 中心地带光强很强； 沿径向远离圆心， 光强以余弦形腿衰减。 δ卩大部分 雇量照射到中心地带， 周边光强很弱。
图 11是使用本发明定向折射配光透镜的 LED路灯 LightTools软件仿真圆锥面光强 图， 其开^ 1犬近似为长方形， 长方形区域内光强均匀， 远离长方形中心向周边的光强分布 线性均匀。
图 12是使用本发明定向折射配光透镜 LED路灯 LightTools软件仿真配光曲线。 在实线所示的长边 C0面， 其光强 40%时的出光角为： C0= (225+22.5) - (135- 22.5) =135。 ；
在虚线所示的短边 C90面， 其光强 40%时的出光角为：
C90=225-135=90° 。
图 13是用本发明定向折射配光透镜模拟仿真 LED路灯的工程应用：
40%光强 CO方向 (矩形长边)长度：
L=2HXtan(C0/2) =2HXtan(135° /2) =4.42H;
40%光强 C90方向 (矩形短边)长度：
W=2HXtan(C90/2) =2HXtan(90。 /2) =2H。
即：当满足定向折射配^ t镜 LED路灯 LightTools软件仿真配光曲线时，路灯 S寸 到路面的光强分布为近似矩形， 矩形的长 CO与宽 C90之比例为： 2.41。
由图 14所示的光强分布图以及图 15所示的配光曲线可见： 实测结果与模拟仿真数 据基本一致。其 C0面 40%光强光束角为 133。 ， 其 C90面 40%光强光束角为 90。 ， 实现 了对路灯光强分布的精密控制。
当路灯杆高度为 10m时， 40%光强路面分布矩形长边 L (C0)及短边 (C90) W为： L=2HXtan(C0/2)=2HXtan(133° /2)=46(m)
W=2HXtan(C90/2) =2HXtan(90。 /2) =20 (m)
实例效果结论：
如图 16所示， 1定向折射非成像配光透镜对光的能量进行重新分配，对 LED光源 所发出的舰行麵和改变， 从而实现了光源能量的禾 ϋ用和光强分布的定向控制。 定向 折射非成像光学配^ t镜， 把 LED光源的光线定向成折射到了透镜表面， 使 LED点光源 改变成为透镜表面均匀的面光源，提高了光强分布均匀度；改变了 LED光源的朗伯特性， 使 LED路灯光强的分布随着出射角度增大的衰减较小； 其结构简单、 收集光线角度大、 光能量利用率高。
分析图 17所示的实测 150W定向折射非成像光学配光透镜 LED路灯配光曲线， 结果 是： 照明均匀度好， 沿路面没有眩光， 照明效率高， 实现照明要求所需要的功率小。

Claims

权利要求书
1.一种 LED光源的非成像光学定向配^ f镜， 包括透镜体 (203)， 该透镜体 (203)具 有入射面 (201)和出射面 (202)，其特征在于：所述的入射面 (201)为 LED光线入射面，所 述的入射面 (201)排列为齿形； 所述的入射面 (201)与出射面 (202)的夹角 θ =0〜90° 。
2.根据权利要求 1所述的 LED光源的非成像光学定向配 镜， 其特征在于： 所述 排列为齿形的入射面 (201)排列于同一基准面上， 该基准面为平面或曲面。
3.根据权利要求 1或 2所述的 LED光源的非成像光学定向配 ^if镜， 其特征在于： 所述的出射面 (202)为平面或曲面。
4.根据权利要求 3所述的 LED光源的非成像光学定向配 镜， 其特征在于： 所述 的入射面 (201)为平面或曲面。
5.根据权利要求 4所述的 LED光源的非成像光学定向配 镜， 其特征在于： 所述 的透镜体 (203)为玻璃材料、 PS材料、 PC材料或 P醒材料。
6.根据权利要求 5所述的 LED光源的非成像光学定向配 镜， 其特征在于： 所述 的入射面 (201)、 出射面 (202)为具有拐点或无拐点的连续曲面。
7.根据权利要求 5所述的 LED光源的非成像光学定向配 镜， 其特征在于： 所述 的入射面 (201)、 出射面 (202)为断续曲面。
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