王恺，广东昭信光电科技有限公司，副总经理，工程师，王恺，2011年毕业于华中科技大学&武汉光电国家实验室，获工学博士学位，主要从事大功率LED优选封装与应用技术研究，包括基于自由曲面光学的应导向型封装ASLP、晶圆级封装WLP、系统集成封装SiP等。所研发的新型自由曲面光学算法以及应用导向型LED封装为高品质LED照明提供了一套有效的光学解决方案，在LED封装、背光、汽车前大灯、道路照明等领域得到成功应用，引起靠前相关研究机构的关注（如Philips欧洲研究院、韩国LIFTRC研究中心等）。2009至2011年兼任广东昭信光电科技有限公司研发主管一职。2011年至今担任广东昭信光电科技有限公司副总经理，负责新型LED封装及特种照明应用产品的研发工作，包括高光效大功率LED（>150 lm/W）、高亮度车灯专用LED模组、低成本荧光粉保形涂覆技术、LED标准光组件等，具有将研究成果成功转化为产品并盈利的产业经验。

Preface
1 Introduction
1.1 Overview of LED Lighting
1.2 Development Trends of LED Packaging and Applications
1.3 Three Key Issues of Optical Design of LED Lighting
1.3.1 System Luminous Efficiency
1.3.2 Controllable Light Pattern
1.3.3 Spatial Color Uniformity
1.4 Introduction of Freeform Optics
References
2 Review of Main Algorithms of Freeform Optics for LED Lighting
2.1 Introduction
2.2 Tailored Design Method
2.3 SMS Design Method
2.4 Light Energy Mapping Design Method
2.5 Generalized Functional Design Method
2.6 Design Method for Uniform Illumination with Multiple Sources
References
3 Basic Algorithms of Freeform Optics for LED Lighting
3.1 Introduction
3.2 Circularly Symmetrical Freeform Lens–Point Source
3.2.1 Freeform Lens for Large Emitting Angles
3.2.1.1 Step 1. Establish a Light Energy Mapping Relationship between the Light Source and Target
3.2.1.2 Step 2. Construct a Freeform Lens
3.2.1.3 Step 3. Validation and Optimization
3.2.2 TIR-Freeform Lens for Small Emitting Angle
3.2.3 Circularly Symmetrical Double Surfaces Freeform Lens
3.3 Circularly Symmetrical Freeform Lens – Extended Source
3.3.1 Step 1. Construction of a Point Source Freeform Lens
3.3.2 Step 2. Calculation of Feedback Optimization Ratios
3.3.3 Step 3. Grids Redivision of the Target Plane and Light Source
3.3.4 Step 4. Rebuild the Energy Relationship between the Light Source and Target Plane
3.3.5 Step 5. Construction of a Freeform Lens for an Extended Source
3.3.6 Step 6. Ray-Tracing Simulation and Feedback Reversing Optimization
3.4 Noncircularly Symmetrical Freeform Lens–Point Source
3.4.1 Discontinuous Freeform Lens Algorithm
3.4.1.1 Step 1. Establishment of a Light Energy Mapping Relationship
3.4.1.2 Step 2. Construction of the Lens
3.4.1.3 Step 3. Validation of Lens Design
3.4.2 Continuous Freeform Lens Algorithm
3.4.2.1 Radiate Grid Light Energy Mapping
3.4.2.2 Rectangular Grid Light Energy Mapping
3.5 Noncircularly Symmetrical Freeform Lens–Extended Source
3.5.1 Step 1. Establishment of the Light Energy Mapping Relationship
3.5.2 Step 2. Construction of a Freeform Lens
3.5.3 Step 3. Validation of Lens Design
3.6 Reversing the Design Method for Uniform Illumination of LED Arrays
3.6.1 Reversing the Design Method of LIDC for Uniform Illumination
3.6.2 Algorithm of a Freeform Lens for the Required LIDC
References
4 Application-Specific LED Package Integrated with a Freeform Lens
4.1 Application-Specific LED Package (ASLP) Design Concept
4.2 ASLP Single Module
4.2.1 Design Method of a Compact Freeform Lens
4.2.2 Design of the ASLP Module
4.2.2.1 Optical Modeling
4.2.2.2 Design of a Compact Freeform Lens
4.2.2.3 ASLP Module
4.2.3 Numerical Analyses and Tolerance Analyses
4.2.3.1 Numerical Simulation and Analyses
4.2.3.2 Tolerance Analyses
4.2.3.3 Experiments
4.3 ASLP Array Module
4.4 ASLP System Integrated with Multiple Functions
4.4.1 Optical Design
4.4.1.1 Problem Statement
4.4.1.2 Optical Modeling
4.4.1.3 Design of a Freeform Lens
4.4.1.4 Simulation of Lighting Performance
4.4.2 Thermal Management
4.4.3 ASLP Module
References
5 Freeform Optics for LED Indoor Lighting
5.1 Introduction
5.2 A Large-Emitting-Angle Freeform Lens with a Small LED Source
5.2.1 A Freeform Lens for a Philip Lumileds K2 LED
5.2.2 Freeform Lens for a CREE XLamp XR-E LED
5.3 A Large-Emitting-Angle Freeform Lens with an Extended Source
5.3.1 Target Plane Grids Optimization
5.3.2 Light Source Grids Optimization
5.3.3 Target Plane and Light Source Grids Coupling Optimization
5.4 A Small-Emitting-Angle Freeform Lens with a Small LED Source

自由曲面光学是一新兴的LED照明光学技术，其优势在于具有较高的设计自由度和精确的光能量分布控制，能够提供一个实现高品质LED照明的有效的光学设计方法。
本书系统地介绍了一系列面向LED封装与应用的自由曲面光学算法与设计方法，包括各类圆对称自由曲面透镜、非圆对称自由曲面透镜、自由曲面透镜阵列优化等。同时，也包括了LED照明中各种先进的自由曲面光学设计应用与案例分析，包括光型可控的应用导向型LED封装、LED室内照明、LED道路照明、LED直下式背光、LED汽车前大灯、LED微投影仪、高空间颜色均匀度自由曲面透镜等。并且，在附录中提供基本的自由曲面光学算法计算代码供读者参阅。本书中所介绍的大部分LED自由曲面光学算法和设计都得到了工业界的验证，在具有学术价值外，同时也具有较高实用指导价值。
通过本书，读者将对各种LED封装与应用中的自由曲面光学技术有一个全面而深入的理解。同时，读者还可以系统地学习到详细的自由曲面光学算法与设计方法，便于提高独自开发先进LED照明光学设计的能力。本书有利于加快LED封装与应用的研发速度。此外，通过开放的算法代码与案例分析，读者将能够更快更高效地掌握LED照明自由曲面光学的设计方法。
本书可供从事LED照明的研究人员、工程师、高校的研究生以及高年级的本科生参考。