实现LED二次配光的自由曲面光学系统设计

发布时间：2018-04-26 23:09

本文选题：LED + 自由曲面　；参考：《浙江大学》2015年硕士论文

【摘要】：如今,随着越来越多的国家以固态半导体照明逐渐取代白炽灯、卤素灯等为主导的传统照明,新一代照明光源LED的研究已经成为光学领域的新星。LED以其体积小、亮度高、功耗低、价格便宜、寿命长、节能环保等优势,在各个行业领域均得到了广泛应用。然而,如何对LED进行高效的配光设计,以期其形成满足各个应用领域要求的照明灯具,成为了一个亟待解决的重大课题。基于自由曲面的LED二次配光元件,设计自由度高,能够有效地约束LED的发光能量分布,并且相较于传统的配光方式结构相对简单,可以实现比较复杂的照明设计需要,具有非常巨大的研究价值。因此,本文主要针对照明领域中的两个典型案例——准直照明与均匀照明,来探讨如何为LED光源设计自由曲面光学系统,具体研究内容如下：研究了自由曲面初始面形结构设计方法。首先根据几何光学的基本定律,推导出自由曲面离散点计算的公式,然后又通过能量守恒定律建立LED光源与目标面之间的能量映射网格,并对旋转对称与非旋转对称结构的光学系统能量映射网格进行了逐一分析求解。此外,还通过两个自由曲面光学系统的设计案例来验证初始结构设计方法的准确性和可靠性。分别从LED探照灯光学系统设计与LED道路照明光学系统设计这两个实例出发,论述了准直照明光学系统与均匀照明光学系统的二次配光设计流程。并分别设计了一种反射与透射自由曲面相结合的新型准直系统以及一种可以实现均匀矩形斑照明的自由曲面透镜。此外,还分别针对这两种光学系统,设计了两种优化方法,并进行优化设计,最终均达到了比较理想的光学效果。
[Abstract]:Nowadays, as more and more countries replace incandescent and halogen lamps with solid state semiconductor lighting, the research of new generation lighting source LED has become a new star in the field of optics with its small size and high brightness. The advantages of low power consumption, low price, long life, energy saving and environmental protection have been widely used in various fields. However, how to design the LED with high efficiency in order to meet the requirements of various application fields has become an important task to be solved. The LED quadratic light distribution element based on free-form surface is designed with high degree of freedom, which can effectively restrain the luminous energy distribution of LED. Compared with the traditional light distribution mode, the structure is relatively simple, and it can realize more complex lighting design needs. It has great research value. Therefore, this paper mainly aims at two typical cases in the field of illumination-collimation lighting and uniform illumination, to discuss how to design a free-form surface optical system for LED light source. The main contents are as follows: the design method of the initial plane structure of free-form surface is studied. According to the fundamental law of geometric optics, the formula for calculating discrete points of free-form surface is derived, and then the energy mapping grid between LED light source and target surface is established by energy conservation law. The energy mapping meshes of optical systems with rotational and non-rotational symmetry structures are analyzed and solved one by one. In addition, the accuracy and reliability of the initial structural design method are verified by two design cases of free-form surface optical system. Based on the two examples of LED searchlight optical system design and LED road lighting optical system design, the secondary light distribution design flow of collimating illumination optical system and uniform illumination optical system is discussed. A new collimation system combining reflection and transmission free-form surfaces and a free-form lens which can realize the illumination of uniform rectangular speckle are designed respectively. In addition, two optimization methods are designed and optimized for the two optical systems.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM923.34

【参考文献】