LED LUMINAIRE DESIGN: OPTIMIZATION AND …...LED LUMINAIRE DESIGN: OPTIMIZATION AND ANALYSIS LED...
Transcript of LED LUMINAIRE DESIGN: OPTIMIZATION AND …...LED LUMINAIRE DESIGN: OPTIMIZATION AND ANALYSIS LED...
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LED LUMINAIRE DESIGN: OPTIMIZATION AND ANALYSIS
LED Professional Magazine Webinar May 7, 2014
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Presenter
●Dave Jacobsen Senior Application Engineer at Lambda
Research Corporation for over 5 years. Prior to that 20+ years at PerkinElmer, formerly EG&G, as a Principal Optical Engineer working with xenon light sources and systems.
● Lambda Research Corporation Celebrating our 21st year. Makers of
TracePro, TracePro Bridge for SolidWorks, and OSLO optical design and analysis software.
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Agenda
● Designing LED lighting systems using SolidWorks and the TracePro Bridge for SolidWorks
● Making a LED property source property using the information from an LED datasheet
● Setting up and defining a 3D optical model for analysis and optimization
● Optimization methods
● Reflector optimization
● Diffuser optimization
● Creating IES files from the raytrace results
● Photorealistic rendering
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The Goal – Design and Optimize a LED reflector and diffuser combination
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LED Luminaire Design Process – Typical Workflow
Project Specification or Design Goal
Calculate Source Requirements
Choose Source
Model Source or get Ray File
Set up Initial Model of Optic (Lens or Reflector) in Interactive Optimizer
Set up Initial Model in TracePro, including Optic,
Source, and Target
Define Optimization Goals and Targets
Optimize Optic in Interactive Optimizer
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LED Luminaire Design Process – Typical Workflow
Analyze Results in TracePro
Output Design, CAD Files, Drawings, IES Files
Fabricate Prototype
Measure Prototype and Verify Design Meets Design Goals
Update Model and Make Changes if Necessary
Deliver to Customer
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Using SolidWorks to make the LED model – Seoul Semiconductor Acrich2-13W
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Assigning optical properties to the LED model using the TracePro Bridge for SolidWorks
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Exporting the model for analysis using the TracePro Bridge for SolidWorks
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TracePro Bridge for SolidWorks
Live Demo
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LED model with color properties applied
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LED Datasheet – Seoul Semiconductor Acrich2-13W
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Making a LED source property using the graphs on the LED datasheet
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Making a LED source property using the graphs on the LED datasheet
Live Demo
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Setting up the system for analysis and optimization
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Setting up the system for analysis and optimization
LED array
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Analyzing the initial raytrace results
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Optimization methods– Downhill Simplex vs. Variable Scanning
The Downhill Simplex method is a local optimization method, meaning it will converge to the solution closest to the starting point. It’s possible
that a better solution is available. Changing the initial starting conditions can be used as a test to see if a better solution is available. This is a
good choice when optimizing geometry, position, and rotation where it is desirable to “jump” around the solution space to find and then refine
the best choices for variable values.
The Variable Scanning method is used to scan or step through all possible variable combinations. This can be used to define an
appropriate range of variables before starting a Downhill Simplex optimization, or in the example used in today’s webinar, to step through diffuser properties in a catalog to find the best option.
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Optimization methods– Downhill Simplex Method
Solution Space
Best Solution
Local minima
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Optimization methods– Variable Scanning Method
The Variable Scanning method can be used to step through each of the properties in a catalog of properties, in this case Mold-Tech profiles, to find the
best match for the optimization goal.
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LED Professional Symposium and Expo
Lambda Research Corporation will be presenting a symposium on
LED Luminaire Design Optimization - Theory, Methods, and Applications
at the LED Professional Symposium and Expo
Bregenz, Austria, Sept. 30th-Oct. 2nd
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Optimizing the reflector – Downhill Simplex Method
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Optimizing the reflector
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Optimizing the reflector - Video
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Analyzing the raytrace results after reflector optimization
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Analyzing the raytrace results after reflector optimization
Before Reflector Optimization After Reflector Optimization
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Testing the results by re-optimizing with a different starting condition
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Testing the results by re-optimizing with a different starting condition
First Optimization Start Condition Second Optimization Start Condition
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Optimizing the choice of diffusers to improve performance
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Optimizing the choice of diffusers to improve performance – Variable Scan Method
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Optimizing the choice of diffusers to improve performance – Scheme Macro Code
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Optimizing the choice of diffusers to improve performance - Video
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Analyzing the raytrace results after diffuser optimization
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Analyzing the raytrace results after diffuser optimization
After Reflector Optimization After Diffuser Optimization
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Analyzing the raytrace results after optimization
Before Optimization After Reflector & Diffuser Optimization
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Choosing from a catalog of arbitrary diffusers
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Choosing from a catalog of arbitrary diffusers
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Optimizing other parameters
Numerous additional parameters are open to optimization, including: •Position
•Thickness
•Rotational angle
•Reflector surface properties including reflectivity and scattering
•Diffuser material property
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Generating an IES file
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Viewing a lighting report in the IES/LDT Analysis Utility in TracePro
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Photorealistic rendering results: with and without diffuser
Without Diffuser With Diffuser
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Summary and Questions
TracePro streamlines the illumination design process and accelerates product time to market with:
A familiar CAD interface as well as the TracePro Bridge for SolidWorks
Superior raytracing performance
Tools and utilities optimized for the lighting and luminaire designer
Powerful 2D and 3D optimization capabilities
Comprehensive visualization and analysis tools For more information or to sign up for our free 30-day trial please visit us at:
www.lambdares.com
Phone: 978-486-0766 E-mail: [email protected] For questions about the topics in this webinar please contact Dave Jacobsen at: [email protected]