FRED Optimization FRED A software tool for modern

FRED Optimization FRED: A software tool for modern engineering

FRED What is FRED? Overview • Comprehensive opto-mechanical systems design analysis tool • Stray light analysis (scatter and ghosting) • Coherent beam propagation • Imaging system design and photo-realistic rendering • Virtual prototyping • Opto-mechanical systems debugging (Forensic Optics) • Thermal self-emission analysis • Illumination design • Tolerancing, fabrication and testing • Both sequential and non-sequential raytracing modes • Multi-variable optimization capability

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

FRED What is optimization used for? • Positioning geometry • Controlling geometry size • Modifying surface shapes • Detector power transfer efficiency • Field distribution, shape and size • Pattern structure variation • Color image analysis • User-defined merit functions and variables Optimization Applications

FRED What kind of optimization? Optimization Method Non-sequential optimization is fundamentally different from the methods used in sequential software design FRED uses both 1 -D and multi-variable Simplex optimization • Robust method despite stochastic noise • Default and user-definable merit functions and variables • Constrained variable ranges or fractional parameterization • Limited only by computing hardware • Multiple restarts (Pseudo-Global) • Simulated Annealing (Pseudo-Global)

FRED Optimization Variables What variables are available? Any entity property in the model can be a variable Default Variables • Position/Orientation parameters • Curvature • NURB control point X, Y, Z coordinates • NURB control point weights • Conic constant • Aspheric coefficients • Lens bending • Lens power • Lens thickness • Element volume boundary Custom Variables • User-defined BASIC script • Scripting commands give access to every parameter and function available in the GUI

FRED What metrics are available? Custom Metrics Project specific requirements may necessitate userdefined custom metrics be used. Optimization Metrics Default Metrics • RMS spot size • Encircled spot radius • Maximum power on surface • Minimum power on surface • Uniformity • Centroid position • Distribution fit to data

FRED Optimize an LED Distribution Optimization Example Use FRED to optimize an LED collimating lens for a uniform illuminance distribution by varying the lens surfaces.

FRED Optimization Example Optimize an LED Distribution • User-defined metric driven to a minimum by the simplex • Metric needs to account for both power and uniformity Metric = SD/Power • Scripted metric is… BASIC Calculate Illuminance Calculate SD Calculate Power Transfer Return Metric Value

FRED Optimize an LED Distribution Optimization Example 55 LUX (lm/m 2 ) 88. 5 LUX (lm/m 2 )

FRED Optimization Summary • Optimization can be used at any point in the engineering process, from simple positioning to complex analyses • Built in variables and metrics cover a wide range of applications, with an ever expanding catalog of default options • Allowing custom variables and metrics makes FRED’s optimization the most generic and flexible on the market • Having optimization capability in your toolbox saves valuable engineering time and money