VirtualLab Fusion 2025.2 (Build 1.118): Advanced Physical Optics Simulation Software

VirtualLab Fusion 2025.2 is the latest release of LightTrans' industry-leading software for physical optics simulation and design, released in September 2025. This version introduces new unpolarized source models for realistic LED modeling, enhanced polarization control components, and over 30 bug fixes across the platform .

Key New Features in 2025.2

New Unpolarized Source Models for LED-like Emission

Two new source types specifically designed for realistic LED emission characteristics :

Both models intelligently generate orthogonal radial and azimuthal polarization states for accurate unpolarized light output .

New Functional Components

Linear Polarizer

• Breaks through traditional Jones matrix limitations

• Maintains accurate performance under non-paraxial illumination (e.g., LED sources)

• Ensures physically accurate results from near-axis to high-NA applications

• No need to define media or structural properties

Stop Component

• New recommended component for defining stops in optical systems

• Provides faster simulation speed for any obstacle size

• Accurately simulates diffraction effects from tiny features—capability difficult to achieve with previous methods

• Enables analysis of microscopic defects on system-level imaging performance

Polarization Control Component (Azimuthal)

• Allows phase delay between polarization components to vary as a function of position across the field

• Enables custom polarization shaping beyond standard waveplates

• New possibilities for complex beam shaping applications relying on modulated polarization

Transverse Beam Splitter

• Defines macroscopic spatial patterns of reflection and transmission on beam splitting surfaces

• Load any 2D region as a specific optical area (e.g., central mirror or hole)

• Assign different reflectance/transmittance values for points inside vs. outside loaded region

• Models beam splitters with complex features including central obscuration, reflective patches, or off-axis apertures

Improved Simulation Capabilities

Off-Axis Parabolic Mirror Enhancements

• Now supports definition of negative focal lengths

• Enables direct configuration of both concave and convex off-axis parabolic mirrors

• Provides more flexible modeling experience

Extended Surface Channels

• Diffractive Lens Element: Now supports all four surface channel types (++, +-, -+, --)

• Enables fully non-sequential use for more complex system modeling

• Extended to holographic optical elements, functional metalenses, and functional modulated