Mastering Diffuse Scattering — Expert HUD Display Optimization with Ansys Solutions
Amin: Welcome to this technical deep dive on head-up display optimization with Lumerical and Speos. I'm Majid, Technical Manager at Ozen Engineering. Our team provides end-to-end optical consulting, mentoring, and software solutions to help engineers accelerate innovation.
Workflow Overview
- Model microtextured surfaces and run photonic simulations in Lumerical.
- Extract a physics-based BSDF, capturing both BRDF and BTDF, and export it as a BRDF file.
- Import the BRDF file into Speos, apply it in a realistic photometric scene, and evaluate the human vision experience.
This bridge from nanoscale physics to real-world perception empowers our customers to design with confidence.
Parametric Rough Surface Modeling in Lumerical
This slide shows:
- 3D Rendering: A periodic random rough surface defines how light will scatter.
- Object Library: Exposes key parameters such as RMS Roughness, Correlation Length, and Refractive Index.
- Height-Height Correlation Function: Governs spatial statistics, ensuring the surface matches measured metrology.
With these inputs, engineers can explore anti-glare films, diffusers, or AR coatings in minutes.
Simulation Process
We place the surface inside an FDTD region. A broadband plane wave source illuminates the structure. Block periodic boundaries create an infinite lattice without edge artifacts. This simulation records both transmittance from air. Multiple seeds and polarizations are averaged to reduce noise. The final BSDF is saved as a compressed .brdf file, your surface's optical fingerprint, ready for fast ray-based propagation in Speos.
Application in Speos
Inside Speos, we assign the BRDF to a thin diffusive protective film on an automotive display. The blue arrow marks the forward scattering direction defined in Lumerical, so both frontward and backward interactions are honored.
Next, we simulate the full dashboard under measured HDRI sky and solar lighting. Sensors at the driver's eye capture luminance, color, and contrast. False color maps and CIE plots quantify glare reduction and readability before any hardware is built.
Finally, Speos renders a photorealistic driver view, merging optical physics with human perception. This closes the loop from material design to user experience.
About Ozen Engineering
At Ozen Engineering, we don't just sell software; we mentor teams, deliver turnkey simulations, and help engineers reach the market faster. Contact us to learn how our consulting, training, and licensing support can elevate your next optical program.
Mastering Diffuse Scattering — Expert HUD Display Optimization with Ansys Solutions Amin. Welcome to this technical deep dive on head-up display optimization with Lumerical and Speos. I'm Majid, Technical Manager at Ozen Engineering.
Our team provides end-to-end optical consulting, mentoring, and software solutions to help engineers accelerate innovation. Here's the workflow at a glance. Step 1, we model microtextured surfaces and run photonic simulations in Lumerical.
Step 2, we extract a physics-based BSDF, capturing both BRDF and BTDF, and export it as a BRDF file. Step 3, we import that file into Speos, apply it in a realistic photometric scene, and evaluate human vision experience.
This bridge from nanoscale physics to real-world perception is what empowers our customers to design with confidence. This slide shows parametric rough surface modeling in Lumerical. On the left, a 3D rendering of a periodic random rough surface defines how light will scatter.
In the center, the object library exposes key knobs: RMS Roughness, Correlation Length, and Refractive Index. Below, the height-height correlation function governs spatial statistics, ensuring the surface matches measured metrology.
With these inputs, engineers can explore anti-glare films, diffusers, or AR coatings in minutes. We then place the surface inside an FDTD region. A broadband plane wave source illuminates the structure. Block periodic boundaries create an infinite lattice without edge artifacts.
This simulation records both transmittance from air. Thank you. Multiple seeds and polarizations are averaged to reduce noise. The final BSDF is saved as a compressed .brdf file, your surface's optical fingerprint, ready for fast ray-based propagation in Speos.
Inside Speos, we assign the BRDF to a thin diffusive protective film on an automotive display. The blue arrow marks the forward scattering direction defined in Lumerical, so both frontward and backward interactions are honored.
Next, we simulate the full dashboard under measured HDRI sky and solar lighting. Sensors at the driver's eye capture luminance, color, and contrast. False color maps and CIE plots quantify glare reduction and readability before any hardware is built.
Finally, Speos renders a photorealistic driver view, merging optical physics with human perception. This closes the loop from material design to user experience.
At Ozen Engineering, we don't just sell software; we mentor teams, deliver turnkey simulations, and help engineers reach the market faster. Contact us to learn how our consulting, training, and licensing support can elevate your next optical program.
