A practical introduction to state-of-the-art freeform optics design for LED packages and applications By affording designers the freedom to create complex, aspherical optical surfaces with minimal or no aberrations, freeform design transcends the constraints imposed by hundreds of years of optics design and fabrication. Combining unprecedented design freedom with precise light irradiation control, freeform optics design is also revolutionizing the design and manufacture of high quality LED lighting. The first and only book of its kind, Freeform Optics for LED Packages and Applications helps put readers at the forefront of the freeform optics revolution.
Designed to function as both an authoritative review of the current state of the industry and a practical introduction to advanced optical design for LED lighting, this book makes learning and mastering freeform optics skills simpler and easier than ever before with: * Real-world examples and case studies systematically describing an array of algorithms and designs from new freeform algorithms to design methods to advanced optical designs * Coding for all freeform optics algorithms covered makes it easier and more convenient to start developing points of freeform optics and construct lenses or reflectors, right away * Case studies of a range of products, including designs for a freeform optics LED bulb, an LED spotlight, LED street lights, an LED BLU, and many more Freeform Optics for LED Packages and Applications is must-reading for optical design engineers and LED researchers, as well as advanced-level students with an interest in LED lighting. It is also an indispensable working resource design practitioners within the LED lighting industry.
Freeform Optics for Led Packages and Applications
Preface xi 1 Introduction 1 1.1 Overview of LED Lighting 1 1.2 Development Trends of LED Packaging and Applications 5 1.3 Three Key Issues of Optical Design of LED Lighting 7 1.3.1 System Luminous Efficiency 7 1.3.2 Controllable Light Pattern 7 1.3.3 Spatial Color Uniformity 8 1.4 Introduction of Freeform Optics 10 References 12 2 Review of Main Algorithms of Freeform Optics for LED Lighting 15 2.1 Introduction 15 2.2 Tailored Design Method 16 2.3 SMS Design Method 17 2.4 Light Energy Mapping Design Method 18 2.5 Generalized Functional Design Method 19 2.6 Design Method for Uniform Illumination with Multiple Sources 22 References 22 3 Basic Algorithms of Freeform Optics for LED Lighting 25 3.1 Introduction 25 3.2 Circularly Symmetrical Freeform Lens Point Source 25 3.2.1 Freeform Lens for Large Emitting Angles 26 184.108.40.206 Step 1. Establish a Light Energy Mapping Relationship between the Light Source and Target 27 220.127.116.11 Step 2. Construct a Freeform Lens 31 18.104.22.168 Step 3. Validation and Optimization 33 3.2.2 TIR-Freeform Lens for Small Emitting Angle 33 3.2.3 Circularly Symmetrical Double Surfaces Freeform Lens 39 3.3 Circularly Symmetrical Freeform Lens Extended Source 42 22.214.171.124 Step 1. Construction of a Point Source Freeform Lens 45 126.96.36.199 Step 2. Calculation of Feedback Optimization Ratios 45 188.8.131.52 Step 3. Grids Redivision of the Target Plane and Light Source 46 184.108.40.206 Step 4. Rebuild the Energy Relationship between the Light Source and Target Plane 46 220.127.116.11 Step 5. Construction of a Freeform Lens for an Extended Source 47 18.104.22.168 Step 6. Ray-Tracing Simulation and Feedback Reversing Optimization 47 3.4 Noncircularly Symmetrical Freeform Lens Point Source 48 3.4.1 Discontinuous Freeform Lens Algorithm 49 22.214.171.124 Step 1. Establishment of a Light Energy Mapping Relationship 49 126.96.36.199 Step 2. Construction of the Lens 52 188.8.131.52 Step 3. Validation of Lens Design 55 3.4.2 Continuous Freeform Lens Algorithm 55 184.108.40.206 Radiate Grid Light Energy Mapping 57 220.127.116.11 Rectangular Grid Light Energy Mapping 58 3.5 Noncircularly Symmetrical Freeform Lens Extended Source 60 18.104.22.168 Step 1. Establishment of the Light Energy Mapping Relationship 61 22.214.171.124 Step 2. Construction of a Freeform Lens 61 126.96.36.199 Step 3. Validation of Lens Design 62 3.6 Reversing the Design Method for Uniform Illumination of LED Arrays 63 3.6.1 Reversing the Design Method of LIDC for Unifor