An introduction to the new TracePro Interactive Optimizer for Lighting Design

Presented by:Lambda Research Corporation25 Porter Rd.Littleton, MA 01460www.lambdares.com

March 24th, 2010

Presenter:Michael GauvinVP Sales & Marketing, Lambda Research Corporation

In this webinar you will learn:• Why Lambda Research should be your choice

for optical simulation software • What TracePro is and what it can do • What sort of applications it can and has been

used for• How it can be used for illumination and lighting

design • What the new Interactive Optimizer utility can

do for lighting optimization • How to use TracePro to optimize your lighting

designs

Format

The presentation will last approximately 30-minutes followed by a 10-15 minute question and answer session.

Please submit your questions anytime using the GoToWebinar control panel

Celebrating our 17th year in business

2 Successful Small Business Innovative Research projects, one with NASA JPL and second with NASA Goddard

NASA spin-off success story

Partnered with Autodesk, SolidWorks, Spatial Technologies and Intel

Dedicated to making our customers successful, customers include, Ford, GM, Johnson and Johnson, Matsushita, Chinon, VTT, SICK, Royal Observatory, Philips, HP, General Electric, Olympus, and Garmin

Lambda Research Corporation

Our Vision Statement: To produce the MOST ACCURATE optical software for lighting simulation, with the greatest power, flexibility and ease of use.

Lambda Research sets itself apart as a cost effective, single source for optical, optomechanical and illumination design

software solutions

3D Advanced Raytracing for Lighting Design

Most intuitive interface & shortest learning curve

Quickest return on investment in lighting design software

TracePro Overview• Solids based optical analysis (ACIS)• Generalized Monte-Carlo ray-trace• Object-oriented C++• Interoperability with lens design, almost all CAD

programs, and modeling software– Built-in compatibility with other ACIS-based software

• Pro/E, SolidWorks, AutoCAD Inventor, Rhino 3D Solid Model and over 100 others.

– Optional 2-way IGES and STEP translators• Microsoft Windows type user interface• Light is conserved, light can be reflected, transmitted,

absorbed, and scattered at any surface• 1 watt or lumen in, Energy is conserved: a + r + t +

TISr + TISt = 1

Application: Design of LED Lighting Systems

Design of LEDs, reflectors, lenses, LED arrays and complete lighting systems

Application: LED Illumination

• Road, Rail, Airport Signs and Displays

• Traffic Signals

• Highway Messaging

• Advertising

• Emergency Lighting

LED Downlights

Downlights for indoor lighting

High output LED MR16 downlights

Work surface illumination

Stage lighting

Lighting: LED Source Design

TracePro model of Luxeon® III Star LED from Lumileds

Not only LEDs but Lamps as well, over 500 in our lamp catalog

Simulated Data(Blue) - TracePro

Measured Data(Red) - Oxytech

Application: Light GuidesPredict performance with Optical Modeling

Improve efficiencyand spatial light outputuniformity

Achieve bright sweetspot, falling off towardsedges

Application: Backlight Simulation of Cell Phones

Predict performance with Optical Modeling

Improve efficiencyand spatial light outputuniformity

Application: Optimize Luminance and Brightness of LCD Display

Backlight

Non-even illuminationwith Hot spots Even illumination

Application: Projection Systems

Silicon Optix, HQV are trademarks of Silicon Optix

Application: Diagnostic Medical Devices

• Fluorometersimulation in TracePro

Application: Analytical and Clinical Instrumentation for Life Science

Excitation and Emission Ray Trace

with Fluorescing Sample

Stokes Shift

APPLICATION AREAS:APPLICATION AREAS:

Sample in cuvette

Fluorescence SpectroscopyRaman SpectroscopyFlow CytometryDNA Micro Array and Micro Plate ReadersBiosensorsNucleic Acid AmplificationAssay & Cell Based ImagingConfocal Laser Scanning MicroscopyLaser Induced Fluorescence Detection (LIF)Fluorescence Resonance Energy Transfer (FRET)In-Vitro DiagnosticsIn-Vivo Diagnostics

Lighting: Reflector Design

Facetted Reflectorsdesigned in TracePro

•Enter package dimensions: source position, diameter and length

•Validate desired beam specification in TracePro

•Analyze with Candela and Illuminance plots

Lighting: Luminaire and Louver Design

Direct, Semi-Direct, Indirect Luminaires

Balanced luminanceSpatial distributionLimitation of glareManagement of glare

What TracePro looks like

What it can do

What it can do

What it can do

What it can do

Introducing the new TracePro Interactive Optimizer

Main Interactive Optimizer Utility Window

The main Toolbox of the optimizer allows you to digitize in a design, do interactive raytracing and bring in bitmaps to digitize sketches. In this example we are digitizing in a faceted reflector for a downlight.

Using the Seg Toolbox Tool

When the Seg tool is active, you can select any segment or add segments to your design. Shown is the capability to add a line or spline segment to your design

After inserting a segment you can sketch in control points and change segment points as needed. Just pull on a segment control point to change curvature

After selecting a segment you can make it reflective or transmissive by using the Property Editor and selecting the Object tab and selecting the value to be reflective as shown above

Using the Seg Toolbox Tool

After selecting the Rays tool from the Toolbox you can interactively trace rays in the Optimizer Utility. You can then switch to the Seg Tool to move segment points so that you can quickly analyze and control angular ray control for each facet

Ray Starting Point

Using the Rays Toolbox Tool

Using the Bitmap Toolbox Tool

Using the Bitmap tool you can import any screen captured image. After importing the image you use the blue control points to make the image larger or smaller, use the central control points to rotate the image and move it into place

You can select an endpoint of the bitmap and make the image larger and smaller

Central Control Points

Using the Bitmap and Seg Toolbox Tools

The Seg Tool allows you to add more segments and control points as needed to sketch the bitmap.

After selecting the SegTool you can add segmented lines and splines to your object to match the bitmap

Left mouse click to select a segment, right click to add control point and segment points.

Verifying the Geometry using Rays Tool

Since this is meant to be a side emitting LED for a lighting application, we can verify the angular output by tracing multiple rays using the Rays Tool to drag rays from start to end positionand verifying that most rays TIR off the lens and exit at anglesgreater than 60 degrees

The next step is to optimize the sketched object. First, we want to set the segment points we wish to vary. To do this, left mouse click on any blue or green segment points (Blue dots are splines, Green dots are line segments) Then go to the Object tab on the Property Editor. Click on the Variable box and then enter the X and Y limits that this segment point is allowed to vary, the dashed lines show these limits in the sketch window.

Using the Obj Tool

Using the Export Menu

Using the Export Menu item you can send your sketched geometry to TracePro using the DDE interface. This option is only available in TracePro Standard and Expert. You can select the materials associated with each object using the Export Dialog. You can also select that on export you can either rotate or extrude the geometry

Select the Z-Axis if you want your objects to be oriented along the Positive Z axis in TracePro

Verifying the TracePro Model

After exporting the geometry and creating a real Luxeon Rebel LED source in TracePro. We can then raytrace the system. Since this is a side emitting LED we expect most of the light toexit greater than 45 degrees from the lens and in fact the peak is almost 70 degrees for this particular lens.

Now to setup our merit function, we use the Optimize menu. Afterselection this brings up the frm Optimization menu. On the left side of the menu, we can see the variables for the optimization, on the right the Target. In this case we have selected a Candela Profile and after left mouse clicking on the Target entry the Target Editor appears where I can digitize in my angular target

Using the Optimize Menu

It is possible to setup multiple targets with different weights. There are currently a total of 6 types of targets, Flux, Irradiance, Intensity, CIE and Irradiance and Candela Profiles. You can digitize in your targets by left mouse clicking on the operand target dialog and entering the target data for 1 or multiple targets.

Specifying more than one target

Hitting the Start button in the Optimization dialog starts the optimization process. The optimization log opens as shown in the upper left and each iteration is shown. Each iteration shows the merit function value, this should decrease as the downhill simplex optimizer hunts for the best solution. Every iterations is saved in the save path directory, along with target data and bmp file output and the variable positions for the three variables are also kept for review or later verification.

Understanding the Optimize Menu

The TracePro Model after 84 iterations

The optimization was stopped after 84 iterations and we can see from the candela plot that we are close to our target. The optimizer has done an excellent job of reducing the light output in the 0-40 degree range with peaks at 70 degrees.

The optimizer writes out both a candela plot and candela information for each iteration to optimizer file directory for later analysis for all 84 iterations

Interactive Demo

I will now bring up the optimizer and work through this LED lighting example to show you the proper method to invoke and work through the optimizer step by step.

Interactive Optimizer edition information:

•The interactive optimizer will work differently in the TracePro LC, Standard and Expert editions

•In TracePro LC, only the sketcher, interactive raytracer and bitmap tools will be active. This is due to the fact the LC does not have the Scheme macro language which is the interface used to export and optimize

•In TracePro Standard and Expert all options will be available

Q&A

I will now answer your questions!