Solid Modeling Models are created by importing lens design or Computer Aided Drafting (CAD) files or by directly creating the solid geometry in TracePro. Users can define, position, move, rotate, scale, sweep, and revolve objects and surfaces via the user friendly 3-D CAD interface and with special tools to insert optical elements such as lens elements, Fresnel lenses, tubes (lens barrels) and baffles. The 3-D model can be zoomed, panned, rotated and rendered. Material and Surface Properties Material and surface properties are applied to object and surfaces in the solid model. Types of properties include: Material Refraction Fresnel reflections Bulk absorption Bulk scatter Gradient index Birefringence Surface Reflection Coatings Thin film stacks Scatter Surface absorption Gratings Temperature and Temperature Distribution Polarization Fluorescence Diffraction RepTile™ - surfaces with random or periodic arrays of repeated structures Surface light sources Flux Irradiance Blackbody / Gray body Users may define properties or apply from TracePro’s property catalogs of commonly used and commercially available materials and coatings: Optical glasses Optical thin films - anti-reflection, metals, dielectrics, dichroics and interference filters Plastics Surface finishes - anodizing, mechanical textured, diffusing and absorbing paints Gradient index materials Wire grid polarizers New and updated properties are continuously being released and made available to users with Maintenance and Support Subscriptions Raytrace Raytracing is the means by which TracePro simulates the distribution of flux throughout a model or at selected surfaces. Sources There are three methods of defining rays that launch into the model for ray trace – Grid, Surface, and File sources. Sources are summarized in the Source Tab of the System Tree as shown below. Here they be disabled, traced, or you can open a dialog box to edit a source.