One of the most significant enhancements in version 2025.03 is the expanded capability for modeling phosphor materials and quantum dots. Engineers can now specify distinct angular distributions for converted rays as well as two additional distribution types for unconverted rays when defining phosphor properties

. This refinement enables more accurate spectral tuning for applications including high-color-rendering LEDs, fluorescent lighting, cathode ray tubes, and plasma displays. The improved quantum dot modeling supports fine control over emission spectra, critical for achieving target color points and uniformity in display backlights and solid-state lighting.

For forward simulation workflows, LightTools 2025.03 introduces the ability to apply a Modulation Transfer Function mesh during illuminance analysis to evaluate imaging performance

. This feature allows engineers to analyze ray data and assess contrast at specific spatial frequencies, bridging the gap between illumination design and image quality assessment. It is particularly valuable for systems where light distribution affects perceived sharpness or detail, such as projection optics, heads-up displays, and camera illumination modules.

The new Luminance Camera capability enables users to configure a spatial luminance device as a pinhole camera for efficient visualization

. This tool generates spatial luminance images that support direct evaluation of color consistency, brightness uniformity, and visual appearance under realistic viewing conditions. Designers can quickly identify hotspots, gradients, or artifacts that might impact user experience, reducing the need for physical prototypes and accelerating design iteration.

Automotive and aerospace engineers benefit from the new Head-Up Display utility, which consolidates multiple analysis functions into a purpose-built workflow

. The HUD tool supports luminance analysis using backward simulation to verify image brightness and uniformity, ray path tracing to identify ghost images and stray light sources, virtual image rendering with scenery overlays, and solar load analysis to assess eye discomfort under direct sunlight. These capabilities streamline the development of safety-critical displays where optical performance directly impacts driver awareness and comfort.

As augmented and virtual reality systems grow in complexity, controlling polarization and managing optical coatings become increasingly important. LightTools 2025.03 introduces a birefringent coating user-defined optical property that enables simulation of thin layers of birefringent material

. This feature is especially valuable for designers of AR/VR headsets who apply specialized coatings to waveguides, combiners, or viewing surfaces to manage polarization states, reduce reflections, or enhance contrast.

To accelerate onboarding and support knowledge sharing, the LightTools Example Model Library has been updated with new application-focused templates

Recent additions include models for human tissue simulation in medical device design, freeform lenses for ultraviolet sterilization systems, and advanced stray light analysis scenarios. These examples provide practical starting points for common challenges and demonstrate best practices for leveraging LightTools capabilities across diverse industries.