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Accurate, Flexible, Fast

Many simulation techniques – connected on one platform

Accurate and Fast

Optical simulation software must provide results as accurate as needed and as fast as possible. That requires control of the accuracy-speed balance. For an optics software which provides ray optics only, accuracy is often not high enough. On the other hand, a software which provides an electromagnetic modeling only, e.g., FDTD, is too slow for most applications.

Pool of Many Interoperable Simulation Techniques

The solution of this dilemma: a powerful optics software must provide (1) a pool of many interoperable simulation techniques, ranging from geometrical optics to rigorous electromagnetic solvers, and (2) a platform to connect them in a unified simulation concept. These innovative principles are realized in VirtualLab Fusion optical modeling and design software. Its breakthrough technologies offer an unrivaled new experience in optical simulation.

The VirtualLab Fusion simulation pool includes interoperable techniques like geometric propagation methods, S matrix for stratified media and its local application on curved surfaces, Fourier modal method (FMM) and its local application, aperiodic FMM with perfect matched layer (PML), Mie theory, split-step techniques, parabasal thin element approximation, fast implementations of RayleighSommerfeld integral, Debye integral, and far-field integral. More techniques are added steadily.


The user of VirtualLab Fusion builds the desired optical system by selecting from comprehensive collections of sources, components, and detectors and positions
them in a 3D geometry, just as it is done in a real lab. Each source, component, and detector come with a suitable modeling technique preselected by the expert
developers of VirtualLab Fusion.

A digital assistant helps to control the accuracy-speed balance. The propagation from sources, between components, and to detectors is selected by VirtualLab Fusion automatically and includes diffraction where needed.

This revolutionary user concept allows focusing on the simulation and design task without being an expert in simulation methods. For expert users the software offers a transparent customized mode of operation as well.


Based on its innovative technology VirtualLab Fusion possesses an unsurpassed flexibility in the modeling of sources, components, and detectors.

  • Modeling of light sources includes but is not restricted to lasers, LEDs, LDs, VCSELs, thermal light sources, x-ray sources, and ultrashort pulses.
  • Modeling of components includes but is not restricted to refractive lenses, freeform surfaces, Fresnel lenses, pancake lenses, GRIN lenses, metalenses, gratings, DOEs, crystals, apertures, prisms, fibers, scatterer, diffusers, micro lens arrays, and SLMs.
  • Modeling of detectors includes but is not restricted to aberrations, PSF/MTF, beam parameters, radiometry, photometry, colorimetry, and ultrashort pulse diagnostic.

Solutions by VirtualLab Fusion

Users of VirtualLab Fusion benefit from its breakthrough technology in an ever-growing range of applications, including but not restricted to solutions for:

  • Lens systems
  • Laser systems and fs/as pulses
  • Fiber coupling
  • Diffractive optics
  • Gratings & metasurfaces
  • Micro lens arrays
  • Diffusers and DOEs
  • AR/VR/XR glasses
  • Scattering
  • Interferometry

VirtualLab Fusion Use Cases

We provide hundreds of Use Cases to demonstrate the amazing potential of VirtualLab Fusion.
Visit our homepage to learn more about our Use Cases and to find the solutions in which you are interested most


Configure Your VirtualLab Fusion

In its standard version VirtualLab Fusion comes with a great variety of modeling techniques, sources, components, and detectors. Dependent on the application the user may add additional packages to the configuration to have all tools on board for solving the formulated modeling and design task with VirtualLab Fusion. Users may select out of a growing number of additional configuration packages on gratings, diffractive optics, flat lenses, light shaping, AR/VR/XR, and distributed computing.

Our Use Cases provide information about the configuration of VirtualLab Fusion applied per case. That helps to find the best configuration for any user of VirtualLab Fusion.

Request your free trial version of VirtualLab Fusion

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LightTrans GmbH

Phone +49.3641.53129-50

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VirtualLab Fusion

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