Ansys Speos
Design & Validation of Optical Systems

• Speos provides an intuitive, easy-to-use CAD interface to handle 3D geometries and assets that can be natively created or imported from other CAD software.
• Speos can rely on parametric modeling thanks to the CAD integrations providing the same look and feel as the CAD host graphical user interface, so non-optical experts can comfortably master the Speos workflow.

• Speos offers an embedded solution to set up an optimization based on a random search algorithm.
  • Variables are based on Speos parameters as well as geometrical ones.
  • Targets are based on values directly measured in the simulation results.

• The design of experiment mode permits the generalization a design table from the selected variables to study the influence of different sets of values on the simulation results’ measurements.
• The scripting interface permits the replication of all the actions done in the user interface, from the source creation to the analysis of the simulation results. The interface provides endless possibilities to automate repetitive tasks, for instance.

• Direct modeling capabilities permit users to define and capture geometries quickly without the complexity of traditional CAD software.
• Non-CAD experts can easily create geometries in a few clicks, reducing the geometry preparation time.

• Speos GPU powered by Nvidia OptiX takes advantage of the Ray-Tracing hardware acceleration available in the latest generations of Nvidia GPUs to reach unmatched simulation performances with no tradeoff on accuracy. Experience the same Speos workflow and result quality in a fraction of the time. The Nvidia RTX6000 Ada Generation delivers performance on Speos simulation equivalent to more than 300 CPU cores.
• Speos HPC accelerates simulation speed beyond any limit. Simulation can be deployed to any HPC infrastructure, Windows or Linux, cloud or locally owned, from a few to thousands of nodes with linear performance scalability. Take advantage of 10,000 cores to run 10,000 times faster.

• HUD design and analysis permits users to study the technical feasibility of a HUD according to windshield shape and packaging constraints
• Automatic tools help design the optical system and improve the perceived quality of the image by optimizing layout and shapes, generating a rotation axis, calculating angles for multiple drivers’ sizes, and automatically displaying required optical volume.
• Objectively qualify the image quality and compare several technical options, scoring the optical and vision performance.
• Validate the compliance against your acceptance criteria and create a complete simulation of the driver’s perception.

• Speos Human Vision allows users to adjust displayed levels to fit with monitor maximum capabilities and set contrasts so that details seen on screen match with details are seen in real life.
  • Human Vision algorithms adjust automatically based on the luminance level constraint in the results.
  • Human Vision and 1:1 luminance are compatible with HDR10 displays for unmatched accuracy in color and contrasts. Stereoscopic (3D) displays and VR-HMDs are also supported to deliver true size and depth perception.
• Speos Live Preview interface allows users to experience real-time simulation results. Powered by GPU-Compute with Nvidia GPUs Speos Live Preview enables users to:
  • See the result from the beginning of the simulation, browse results from available sensors, and review light levels in false color or true visual aspects in Human Vision.
  • Save results any time to further explore and measure in Photometric Labs.
  • Change most optical properties at any time, and with one click, restart the simulation.

Ray Tracing

• Understand ray behavior instantly and see the impact of modeling change as the ray path updates upon design modification.
• Theoretical regularly sampled ray sources can design lighting concepts and manually guide the rays toward your target.
• Visualize Ray Tracing from any light source to review and adjust your design before running any simulation.

Ray Propagation Engine

• Reciprocity of the direct and inverse propagation modes guarantees the accuracy of results whatever the mode selected.
• Simulations permit the materialization and testing out an optical system by propagating rays through the key components of the optical simulation (materials, sources, sensors).

• Light Expert offers the possibility to visualize interactions between light and the different geometries of the optical system to identify potential causes of stray light, ghost images, and reflections.
• The stray light analysis capabilities of Speos permit designers to understand the behavior of the rays before they reach a sensor: all paths the light follows as well as the contribution of each sequence.
• Result Layering: The rays integrated by the different sensors can be analyzed by separating the elements contributing to the simulation results.
  • The impact of the different sources involved in the propagation, for instance to identify which one contributes to a hot spot.
  • The impact of specific faces of the geometries involved during the propagation, optimizes efficiency of the design surface.
  • The impact of the different optical sequences followed by the rays during the propagation, identifies stray light causes.

Speos provides different methods to model light sources.

• Most LED manufacturers provide measured ray files in the Speos format can define sources, similar to luminaire suppliers with the IESNA LM-63 and Eulumdat files.
• Complex source emission can be considered at the LED chip level, accounting for the surrounding optics during the calculations.
• For physics-based renderings, model ambient sources to add realism to the scene, as well as display sources for car interior simulations.
• Thermal emissivity of different geometries can also be considered for simulations in the infrared full spectral bandwidth.

• Using reflection or refraction properties, Speos offers an easy-to-use interface to design Reflector or Lens with variable grid definition (rectangular, circular, stripes, honeycomb, freeform type).
• Geometrically define each pillow or by set the optical beam spread target with embedded optimization.
• Speos offers the best-in-class lightguide design tool to smoothly control prism parameters variation and ensure efficient and homogeneous light distribution.
• In combination with Speos GPU, users can instantaneously check the photometry of its design by facets or for the whole reflector

• Volume behavior of materials covers the spectral absorption, scattering, fluorescence, refractive indexes, gradient indexed, and complex refractive indexes, either as models or tabular input.
• Surface behavior description extends from simple Gaussian/specular models to measured spectral 3D BxDFs, anisotropic, retroreflective, iridescent, polarized properties.
• Achieve complex behaviors with spatial variation, multilayer textures with property blending, or dedicated plugins like the LSWM to use optical gratings from Lumerical simulation.

• Speos offers dedicated capabilities to simulate and assess camera and lidar raw signals in a driving environment.
•  Starting from a digital mock-up, including surrounding geometries, sensor layout and surrounding targets, camera and lidar systems can be physically modeled.
• Integrated into the CAD platform, data acquired by sensor systems can be simulated, considering its characteristics and constraints.
• Complete analyses can be performed for different sensor configurations on various scenarios.

• Speos allows STOP analysis to evaluate the impact of mechanical deformation due to temperature variation on photometric performance.
• Using Workbench integration, Speos and Mechanical connect automatically update the original design with the deformed geometries coming from Mechanical simulation.

Speos is part of the Ansys Optics collection, providing interoperability and design workflow solutions with OpticStudio and Lumerical.

• OpticStudio can export optical lens system as a reduced model called Speos Lens System (.optdistortion file) for accurate and fast camera simulation. Please refer to the OpticStudio page to know more about OpticStudio’s capabilities.
• Lumerical simulation grates simulation using SubWavelength Lumerical plugin. Lumerical is also useful in combination with Speos for accurate CMOS simulation. Please refer to Lumerical page to know more about Lumerical’s capabilities.

• Speos Light Box permits the export and import geometries along with the associated optical data:
  • Sources
  • Optical properties (material, surface properties)
  • Meshing properties (geometries stored as meshes)
• Light Box can handle data exchange between suppliers and customers. It is compatible with multi-CAD platforms where Ansys software is integrated (SpaceClaim, Speos for NX, Speos for Creo Parametric).
• The file format is encrypted so content cannot be edited outside Speos. Its security can also be reinforced with a password.

Ansys LightField helps to facilitate the storage and sharing of pre-computed intermediate simulation results for sub-structures within an optical system. Improve simulation time and allow for black-box sharing between suppliers and their customers for improved performance and IP protection.