FRED A software tool for modern optical engineering Focusing on Illumination www.photonengr.com

FRED A software tool for modern optical engineering Overview: What is FRED? Comprehensive opto-mechanical systems design analysis tool Both sequential and non-sequential raytracing modes Can propagate both coherent and incoherent sources Stray light analysis (scatter and ghosting) Coherent beam propagation Illumination design Biomedical applications Imaging system design and photo-realistic rendering Virtual prototyping Opto-mechanical systems debugging (Forensic Optics) Thermal self-emission analysis Tolerancing, fabrication and testing Multi-variable optimization capability 2 www.photonengr.com

FRED A software tool for modern optical engineering Overview: What is FRED? FRED can be used in virtually every step of the design process. Initial proof of concept Integration of optical and CAD designs Full analysis of a virtual prototype including scatter, coatings, dispersion, absorption, volume scatter, diffraction, thermal emission, source characteristics… Quickly manipulate model parameters for tolerance analyses Integration with vendor catalogs for manufacturing 1 Concept FRED Design 2 Analysis 3 Tolerancing 4 Manufacture 5 3 www.photonengr.com

FRED A software tool for modern optical engineering Focusing on Illumination: Sources Accurate Illumination modeling requires an accurate source definition. FRED offers more flexibility for defining the source than any other optical engineering software package. Capability to import manufacturer ray files and CAD Complete control over ray positions, directions, apodization, power, polarization and wavelength 4 www.photonengr.com

FRED A software tool for modern optical engineering Focusing on Illumination: Sources Importing manufacturer data: 2 Many LED manufacturers provide ray files online: E.g. OSRAM, Cree, Philips Lumileds. FRED reads most ray file formats: E.g. RAY, DAT, DIS, TXT Creating a model with ray data is a simple process: Download file from manufacturer website Import CAD geometry Import ray file data into source Assign spectrum 3 5 www.photonengr.com

FRED A software tool for modern optical engineering Focusing on Illumination: Sources Profiles can be imported into FRED even if numerical data is not available. Images of spectral plots from datasheets can be loaded into FRED and digitized using FRED’s Digitizer. The Digitizer can be used for: Spectral plots Angular distribution plots 2D mechanical drawings 6 www.photonengr.com

FRED A software tool for modern optical engineering Focusing on Illumination: Sources Creating a custom source: The user has the freedom to create custom sources and has complete control over the following parameters: Ray Positions Spectral Range Ray Directions Spectral Weighting Angular Power Apodization Coherence Positional Power Apodization Polarization Source Power Units Digitizer can be used to obtain information from data sheets Source power can be radiometric or photometric units Wavelengths can be specified using a sampled list or continuous spectral function 7 www.photonengr.com

FRED A software tool for modern optical engineering Focusing on Illumination: Geometry 3D CAD Interface with object tree hierarchy for logical system organization. 19 “Element Primitive” solids with boolean operation capability Over 30 types of surfaces and curves CAD Import / Export capability (IGES/STEP) Library of vendor catalogs (lenses, mirrors, prisms) Scripted geometries for added flexibility Objects can be referenced to ANY coordinate system Arbitrary surface trimming operations using surfaces and curves 8 www.photonengr.com

FRED A software tool for modern optical engineering Focusing on Illumination: Photometric Analysis Wavelength spectrum can be sampled or functionally defined Illuminance calculations LUX, Phots, Foot Candles, Lumens Standard photopic or user-defined detector response Luminous Intensity on a Polar Grid (Candela) 9 www.photonengr.com

FRED A software tool for modern optical engineering Focusing on Illumination: Color Image Color image calculations using both radiometric and photometric source definitions Provides data for colorimetric calculations (RGB values, XYZ chromaticity coordinates. Provides visual and contextual plots of the color image distribution. 10 www.photonengr.com

FRED A software tool for modern optical engineering Focusing on Illumination: Photorealistic Rendering FRED has the capability to render a scene photo-realistically FRED’s Importance Sampling functionality allow for raytrace efficiency 11 www.photonengr.com

FRED A software tool for modern optical engineering Focusing on Illumination: Optimization FRED Optimum has a built-in optimization engine Multiple optimization algorithms: Local Pseudo-global Optimization variables can be any parameter of the model - many default selections, complete access with user-script Many default merit functions such as: Maximize power on surface Illumination variance RMS direction spread Spot size Color value Example uses: Designing Free-form optics Optimize geometry for best performance Optimize source properties for desired color Optimize model to match desired profile 12 www.photonengr.com

FRED A software tool for modern optical engineering Focusing on Illumination: Optimization Example: Optimizing a lens for a desired output Lens geometry is modified using NURB control points Left picture: Original lens shape showing wide, non-uniform output profile. Middle picture: Optimized lens for uniform field profile Right picture: Optimized lens for maximum power 13 www.photonengr.com

FRED A software tool for modern optical engineering Focusing on Illumination: Optimization Example: Optimizing a light pipe for target distribution Lens geometry is modified using NURB control points Target distribution Before Optimization After Optimization 14 www.photonengr.com

FRED A software tool for modern optical engineering Summary FRED provides engineers with a flexible and powerful illumination toolbox, used in all stages of the design process. Accurate construction of virtually any source type FRED has native geometry, imports and exports CAD files and catalog parts Wide range of radiometric and photometric calculations Optimization capability Virtually prototyping in software can save both development time and money 15 www.photonengr.com