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Frequently Asked Questions

How can I get a free trial version of VirtualLab Fusion?
There is a free trial of VirtualLab Fusion which you can request from HMS Technology Sales.
To contact HMS Technology Sales for a link to the free trial version of VirtualLab, click on free trial
Are there limitations in the free trial version?
The free trial program has some limitations. It can be used 50 times, and each session is limited to 12 hours. After that, the usage counter will increase, until it reaches 50 uses.
The free trial version can be used for most VirtualLab functions, but it does not save data.
Some advanced functions, such as custom programming in C#, are not available in the free trial version.
How is VirtualLab Fusion sold: purchase? subscription?
The VirtualLab user license you purchase is permanent. There are no required annual fees. Software updates and general software support is included for the first year.
Optional annual renewals are available to receive VirtualLab software updates and general support during the following years. See below for update information.
Is there an annual maintenance charge?
There is no required annual maintenance charge. You can continue using the version you have without further payments.
See below for optional updates and annual renewals.
How can I get updates?
There is an optional annual renewal charge to receive VirtualLab software updates and general support during the following year. Without updating, you can continue using the version you have.
If there is a lapse in annual renewal updates, the next annual renewal charge is based on the last expiration date. For example, if the annual renewal has not been updated for two years, the next annual renewal will be for two years.
Do I need to have the Starter Toolbox to run other programs?
Although each VirtualLab Fusion Toolbox program can operate independently, the VirtualLab Starter Toolbox is most often included, in order to model and optimize a complete optical system. For example, a DOE or grating that is rigorously designed and optimized in other VirtualLab Toolbox programs, can be included in the optical system light path by using the Starter Toolbox.
The VirtualLab Starter Toolbox program can model all the optical elements in the light path, including sources, all optical elements, detectors and analyzers. It includes catalogs of boundary responses, coatings, components, detectors, interfaces, light sources, materials and media, as well as programmable elements and processes.
The Starter Toolbox also includes parametric optimization for the entire optical system, such as distances, positions, sizes, angles, wavelengths, and many more parameters.
When other VirtualLab Toolbox programs are used along with the Starter Toolbox program, VirtualLab Fusion is an integrated software suite of programs for modeling all the microscale and macroscale components in an optical system.
Can I get more information on VirtualLab sofware for my application?
There are many examples, tutorials, webinars and videos about specific applications and operation of VirtualLab software.
Please contact HMS Technology Sales with your requests and questions.
I have Zemax, Code V, FRED ray tracing software.
Why should I be interested in VirtualLab?
VirtualLab Fusion users typically have one or more ray tracing programs, such as Zemax, Code V, FRED or others. VirtualLab software does not compete with these ray tracing programs, because it does fully vectorial fast physical optics modeling when ray tracing is not as accurate.
For applications with feature sizes close to, or even less than, the operating wavelength, ray tracing accuracy is reduced. As diffraction, interference, polarization, wavefront aberrations and temporal and spatial coherence become significant, physical optics modeling is needed. VirtualLab Fusion is especially helpful in these applications for analysis beyond ray tracing.
VirtualLab Fusion does fully vectorial solution of Maxwell's equations. It includes multiple Maxwell solvers for fast, rigorous analysis of optical elements such as gratings, diffractive optics, high NA applications, and a variety of microstructures.
VirtualLab also includes multiple free-space propagation methods: Spectrum of Plane Waves, Fresnel operator, Far field operator and Geometrical optics operator.
The Maxwell solvers, together with the free-space propagation methods, in VirtuallLab Fusion enable switching between spatial domain and k-domain for fast and accurate modeling of microscale to macroscale features in optical systems.
To see more information, click on the following link:
VirtualLab Maxwell Solvers, Free space propagation methods and Fast Physical Optics
VirtualLab Fusion is an integrated software suite of programs for modeling the microscale and macroscale features in optical systems.
I have Lumerical, RSoft, Optiwave physical optics software.
Why should I be interested in VirtualLab?
Finite Difference Time Domain (FDTD) physical optics software is very useful for modeling nanophotonic devices. As the size of optical elements increases, FDTD computation becomes excessive.
VirtualLab includes rigorous Maxwell solvers for optical elements such as diffractive optics and gratings. It also includes the following free space propagation methods: Spectrum of Plane Waves, Fresnel operator, Far field operator and Geometrical optics operator. The propagation method for each region within the optical path can be automatically determined or manually selected. Automatic propagation selection criteria minimizes error as well as numerical effort. The recommended propagation method in each region can also be manually overridden.
For more information, click on: free space propagation and Maxwell solvers

The fully vectorial Maxwell solvers in VirtualLab are fast and accurate. They are less computationally intensive than FDTD for simulating and designing optical elements larger than nanophotonic devices. Therefore, VirtualLab is very efficient for modeling laser systems, imaging systems, projection systems, interferometers, spectrometers, microscopes, telescopes, wafer inspection systems, ultrashort pulse propagation, laser resonators and more.
Components in these systems can include refractive lenses, diffractive lenses, hybrid lenses, microlens arrays, freeform surfaces, high NA optics, grin media, 2D/3D gratings, subwavelength gratings, volume holographic gratings, Bragg gratings and lightguides.
The multiple Maxwell solvers and free space propagation methods in VirtualLab Fusion are aimed at accurately simulating and designing complete optical systems that are not as efficient with FDTD computation.
Does VirtualLab interface with Zemax or Code V?
VirtualLab can import data from Zemax, including: lens data, glass data, beam files, and binary 1/2 surfaces. VirtualLab can convert Zemax beam files (irradiance and phase) to fully vectorial electromagnetic field information. Zemax surface phase data can be used in VirtualLab to design multi-level diffractive lenses and metalenses.

Code V vectorial field data can be imported by VirtualLab. Both the real and imaginary parts of the x, y, z components of the electromagnetic field can be imported.

To contact HMS Technology Sales for more information click here