本文關(guān)鍵詞：LED自由曲面透鏡的設(shè)計(jì)及應(yīng)用研究　出處：《深圳大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： LED 自由曲面 非成像光學(xué) 圓形和環(huán)形光斑透鏡 矩形光斑透鏡

【摘要】：LED作為新型的綠色照明光源,被廣泛應(yīng)用于照明產(chǎn)業(yè)中。然而,由于LED光源的光強(qiáng)類似朗伯分布,不能直接應(yīng)用于照明中,需對(duì)其進(jìn)行二次光學(xué)設(shè)計(jì)。其中二次光學(xué)器件大多采用透鏡或反射器,而前者形成特定光斑的優(yōu)勢(shì)明顯比后者好,故對(duì)LED自由曲面透鏡的研究極具意義。本文的主要工作體現(xiàn)在以下兩個(gè)方面:(1)采用非成像光學(xué)理論知識(shí)推導(dǎo)了圓形和環(huán)形光斑透鏡的自由曲面與LED光源及接收面之間的映射關(guān)系。首先推導(dǎo)出自由曲面方程組,通過(guò)解方程得到離散點(diǎn)坐標(biāo),然后依次建立圓形和環(huán)形光斑透鏡的三維模型,并分別對(duì)其進(jìn)行光學(xué)仿真模擬。當(dāng)光源尺寸為1mm×1mm時(shí),得到圓形和環(huán)形光斑的照度均勻性分別為95.7%和93.7%,光能效率分別為92.3%和91.1%。隨著光源尺寸的增大,圓形和環(huán)形光斑的照度均勻性均逐漸降低,而光能效率基本維持不變,當(dāng)光源尺寸增大到5mm×5mm時(shí),圓形和環(huán)形光斑的照度均勻性都高于86%,光能效率在90%以上。但當(dāng)光源尺寸增大到10mm×10mm時(shí),圓形光斑的照度均勻性不足60%,采用光學(xué)分析軟件中的2D交互式優(yōu)化法對(duì)其進(jìn)行優(yōu)化,優(yōu)化后的照度均勻性提高到85%。將環(huán)形光斑透鏡排列成陣列模式,通過(guò)簡(jiǎn)單的熱分析驗(yàn)證燈具的可行性,并用DIALux軟件進(jìn)行場(chǎng)景模擬,將其應(yīng)用到道路照明案列中。(2)提出了一種細(xì)化網(wǎng)格密度的自由曲面求解算法,并將其應(yīng)用于矩形光斑透鏡的自由曲面。首先采用劃分網(wǎng)格法進(jìn)行矩形光斑透鏡設(shè)計(jì)原理的推導(dǎo),接著根據(jù)折射定律和能量守恒定律推導(dǎo)出自由曲面方程組,然后通過(guò)解方程得到自由曲面的離散點(diǎn)坐標(biāo),并建立矩形光斑透鏡模型。通過(guò)仿真模擬得到均勻性效果很好的矩形光斑,當(dāng)光源尺寸為1mm×1mm時(shí),矩形光斑的照度均勻性為91.2%,光能效率為91.1%。隨著光源尺寸的增大,矩形光斑的照度均勻性逐漸降低,而光能效率基本維持不變,當(dāng)光源尺寸增大到5mm×5mm時(shí),照度均勻性為82.3%,光能利用率為90.7%。但當(dāng)光源尺寸增大到10mm×10mm時(shí),矩形光斑的照度均勻性不足60%,采用反饋優(yōu)化原理對(duì)其進(jìn)行優(yōu)化,優(yōu)化后的照度均勻性提高到80%。最后使用DIALux軟件進(jìn)行場(chǎng)景模擬,將矩形光斑透鏡應(yīng)用到道路照明案列中。
[Abstract]:As a new type of green lighting source, LED is widely used in lighting industry. However, because the intensity of LED light source is similar to Lambert distribution, it can not be directly used in lighting. It is necessary to carry out the secondary optical design, in which the secondary optical devices mostly use lens or reflector, and the former has a better advantage than the latter in forming a specific spot. Therefore, it is of great significance for the study of LED free-form curved lens. The main work of this paper is reflected in the following two aspects: 1). The mapping relationship between the free surface of circular and annular speckle lens, the LED light source and the receiving surface is derived by using the theory of non-imaging optics. First, the equations of the free surface are derived. The coordinates of discrete points are obtained by solving the equation, and then the three-dimensional models of circular and annular speckle lenses are established in turn, and the optical simulation is carried out, respectively, when the light source size is 1mm 脳 1mm. The results show that the illumination uniformity of circular and annular spot is 95.7% and 93.7, respectively, and the light energy efficiency is 92.3% and 91.1, respectively. The light source size increases with the increase of light source size. The illumination uniformity of circular and annular light spots decreased gradually, but the light energy efficiency remained unchanged. When the light source size increased to 5 mm 脳 5 mm, the illumination uniformity of circular and circular spot was higher than 86%. The light energy efficiency is more than 90%, but when the light source size increases to 10 mm 脳 10 mm, the illumination uniformity of circular spot is less than 60%. The 2D interactive optimization method in the optical analysis software is used to optimize it, and the illumination uniformity is improved to 85. The annular speckle lens is arranged in array mode. The feasibility of lamps and lanterns is verified by simple thermal analysis, and the scene simulation is carried out with DIALux software. A free-form surface algorithm for mesh refinement is proposed by applying it to the road lighting case list. It is applied to the free surface of rectangular speckle lens. Firstly, the design principle of rectangular speckle lens is deduced by dividing mesh method, and then the equations of free surface are derived according to the law of refraction and the law of conservation of energy. Then the discrete point coordinates of the free-form surface are obtained by solving the equation, and the rectangular spot lens model is established. The rectangular spot with good uniformity is obtained by simulation, when the light source size is 1mm 脳 1mm. The illumination uniformity of the rectangular spot is 91.2 and the light energy efficiency is 91.1. With the increase of the light source size, the illumination uniformity of the rectangular spot decreases gradually, while the light energy efficiency basically remains unchanged. When the light source size increases to 5 mm 脳 5 mm, the illuminance uniformity is 82.3, the light energy utilization ratio is 90.7, but when the light source size increases to 10 mm 脳 10 mm. The illumination uniformity of rectangular spot is less than 60%, the feedback optimization principle is used to optimize it, the illumination uniformity is improved to 80%. Finally, DIALux software is used to simulate the scene. The rectangular speckle lens is applied to the road lighting case list.
【學(xué)位授予單位】：深圳大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM923.34

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