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Modeling of Microlens Arrays and Diffraction at Apertures

[July 06, 2018]

 

Microlens arrays can be found in different applications, such as imaging, wavefront sensing, and so on.

With the physical-optics simulation technique in VirtualLab, the working principle of the microlens array, e.g. in the case of wavefront sensing, can be clearly demonstrated, and the performance of such systems can be evaluated efficiently. It is also worth mentioning that the diffraction effect from the edge of ...

[July 06, 2018]

 

Microlens arrays can be found in different applications, such as imaging, wavefront sensing, and so on.

With the physical-optics simulation technique in VirtualLab, the working principle of the microlens array, e.g. in the case of wavefront sensing, can be clearly demonstrated, and the performance of such systems can be evaluated efficiently. It is also worth mentioning that the diffraction effect from the edge of the individual microlenses can be taken into consideration in the simulation.

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Modeling of Microlens Arrays with Different Lens Shapes

The imaging properties of a microlens array with different lens shapes are investigated. Change of the focal spots with respect to aberration of input field is demonstrated.

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Advanced PSF & MTF Calculation for System with Rectangular Aperture

By placing a rotated rectangular aperture behind input fields with different sizes, the PSF and MTF in the focal plane are investigated.

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Evaluation of Fiber Coupling Lenses and Their Design

[June 29, 2018]

 

How to ensure a high-efficient coupling of light into optical fibers is an important question in all fiber-related applications.

In VirtualLab, the focal field behind the coupling lens can be easily calculated with the fast physical optics simulation engine, and by calculating the overlap integral, the fiber coupling efficiency can be evaluated. Additionally, with the parametric optimization, the lens parameter can ...

[June 29, 2018]

 

How to ensure a high-efficient coupling of light into optical fibers is an important question in all fiber-related applications.

In VirtualLab, the focal field behind the coupling lens can be easily calculated with the fast physical optics simulation engine, and by calculating the overlap integral, the fiber coupling efficiency can be evaluated. Additionally, with the parametric optimization, the lens parameter can be optimized for customized situations.

Parametric Optimization of Fiber Coupling Lens

With the parametric optimization in VirtualLab, the design of a fiber coupling lens with conical surfaces for efficient coupling into a single-mode fiber is presented.

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Comparison of Different Lenses for Fiber Coupling

For the task of coupling light into a single-mode fiber, two commercially available lenses are selected, and their performance evaluated using the overlap integral.

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Thermal Lens and Stress-Induced Birefringence

[June 21, 2018]

 

It is vital in design to be able to include in your simulation not only those properties or components that play an intentional, wanted role in the system, but also, and with particular care, those effects which have the potential to interfere with its intended purpose, in order to quantify and, if possible, avoid them.

Below we show two examples of VirtualLab’s potential in this area: all thanks to its fast and ...

[June 21, 2018]

 

It is vital in design to be able to include in your simulation not only those properties or components that play an intentional, wanted role in the system, but also, and with particular care, those effects which have the potential to interfere with its intended purpose, in order to quantify and, if possible, avoid them.

Below we show two examples of VirtualLab’s potential in this area: all thanks to its fast and accurate approach, and an interface that allows you both to import measured data (from, e.g., ANSYS) or to include the effects via readily available or customized mathematical models.

Gaussian Beam Focused by a Thermal Lens

The variation of the focal length due to thermal lens effect and the changes of focal spot diameter are demonstrated with respect to the input laser power.

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Stress-Induced Birefringence in Laser Crystals


The stress-induced birefringence in a YAG crystal is investigated, by examining the change of output field with respect to the strength of stresses.
   
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Construction and Modelling of Graded-Index Media

[June 11, 2018]

 

Graded-index, or GRIN, media are employed in optics to construct, among other components, lenses and multimode fibers. In VirtualLab you can easily choose to include GRIN media as part of your optical system, as it includes a fast and accurate modeling technique accompanied by a user-friendly interface that makes setting up the GRIN component a really easy task.

Find out more through our examples below!

Construction ...

[June 11, 2018]

 

Graded-index, or GRIN, media are employed in optics to construct, among other components, lenses and multimode fibers. In VirtualLab you can easily choose to include GRIN media as part of your optical system, as it includes a fast and accurate modeling technique accompanied by a user-friendly interface that makes setting up the GRIN component a really easy task.

Find out more through our examples below!

Construction and Modelling of Graded-Index (GRIN) Lens

VirtualLab allows the specification of a graded-index lens in a very user-friendly way. In addition, such index modulated lenses can be analyzed by ray tracing as well as field tracing.

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Modelling of Graded-Index (GRIN) Multimode Fiber
 
A fast approach for light propagation through GRIN medium, which includes the polarization crosstalk effect, is implemented, and its validity and advantages are shown in comparison with rigorous solver.

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Modelling of Uniaxial and Biaxial Crystals

[June 01, 2018]

 

The anisotropic properties of crystals find applications in optics for plenty of purposes, particularly when it comes to manipulating the polarization properties of light. VirtualLab gives you the possibility to rigorously include both uniaxial and biaxial crystals in your optical system without sacrificing simulation speed.

Below we present two examples: Polarization Conversion in Uniaxial Crystals, and Conical ...

[June 01, 2018]

 

The anisotropic properties of crystals find applications in optics for plenty of purposes, particularly when it comes to manipulating the polarization properties of light. VirtualLab gives you the possibility to rigorously include both uniaxial and biaxial crystals in your optical system without sacrificing simulation speed.

Below we present two examples: Polarization Conversion in Uniaxial Crystals, and Conical Refraction in Biaxial Crystal

Polarization Conversion in Uniaxial Crystals

The conversion of polarization of a linearly polarized light in calcite crystal is demonstrated in VirtualLab.

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Conical Refraction in Biaxial Crystals

With the fast-physical-optics simulation technique in VirtualLab, conical refraction from a KGd crystal is demonstrated.

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Design of Diffractive Optical Elements

[May 25, 2018]

 

Diffractive optical elements (DOEs) play a fundamental role in the growing field of pattern generation, and their design demands specific techniques that differ substantially from those employed for other types of components.

The specific techniques employed to design and optimize diffractive elements (like the Iterative Fourier Transform Algorithm, or IFTA) are available in VirtualLab, rounded off by the Session ...

[May 25, 2018]

 

Diffractive optical elements (DOEs) play a fundamental role in the growing field of pattern generation, and their design demands specific techniques that differ substantially from those employed for other types of components.

The specific techniques employed to design and optimize diffractive elements (like the Iterative Fourier Transform Algorithm, or IFTA) are available in VirtualLab, rounded off by the Session Editor, a convenient guide that takes the user through the design process and which precludes the need for in-depth background knowledge of the method. Automatic checks of the design constraints are included in the process.

Design of Diffractive Beam Splitters for Generating a 2D Light Mark

The Iterative Fourier Transform Algorithm (IFTA) in VirtualLab enables the design of customized beam splitters with high efficiency and flexibility.

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Design of a Diffractive Diffuser to Generate a LightTrans Mark

 
Two diffractive diffusers are designed, with a continuous or discrete phase, to generate a LightTrans trademark. Their performance is investigated.

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Design and Analysis of Laser Systems

[May 17, 2018]

 

Lasers and laser systems play an indispensable role in modern life. They can be found in various applications such as laser material processing, metrology, monitoring, lighting, and so on.

Physical-optics based modeling techniques are necessary for the successful design and analysis of a laser system. With its second-generation field tracing technique, VirtualLab constitutes a suitable tool to perform an efficient ...

[May 17, 2018]

 

Lasers and laser systems play an indispensable role in modern life. They can be found in various applications such as laser material processing, metrology, monitoring, lighting, and so on.

Physical-optics based modeling techniques are necessary for the successful design and analysis of a laser system. With its second-generation field tracing technique, VirtualLab constitutes a suitable tool to perform an efficient evaluation of laser systems. We demonstrate, as examples, the collimation of a laser diode with astigmatism and a laser scanning system.

Collimation of Astigmatic Diode Laser Beam by Objective Lens

High-power laser diodes often exhibit asymmetric divergence and astigmatism. The collimation of such a laser diode is investigated with both ray and field tracing.

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Performance Analysis of Laser Scanning System

A scanning system consisting of a dual-axis galvanometer and an aspherical focusing lens is modelled, with the rotation of the mirrors taken into account in the simulation, as is required in the practical case.

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Sequential and non-sequential field tracing

[May 11, 2018]

 

With the release of the non-sequential extension, VirtualLab is now capable of performing System Analysis with Sequential and Non-Sequential Field Tracing.

This new feature greatly simplifies the construction and analysis of certain types of optical systems, and enables many additional applications.
System Analysis with Sequential and Non-Sequential Field Tracing

The Non-Sequential Configuration can be adjusted ...

[May 11, 2018]

 

With the release of the non-sequential extension, VirtualLab is now capable of performing System Analysis with Sequential and Non-Sequential Field Tracing.

This new feature greatly simplifies the construction and analysis of certain types of optical systems, and enables many additional applications.
System Analysis with Sequential and Non-Sequential Field Tracing

The Non-Sequential Configuration can be adjusted flexibly for various simulation tasks,
Non-Sequential Configuration

e.g., Investigation of Ghost-Image Effects in Collimation Systems,
Investigation of Ghost-Image Effects in Collimation Systems

or Modeling of Etalon with Planar and Curved Surfaces.
Modeling of Etalon with Planar and Curved Surfaces

Thanks to the non-sequential field tracing technique, multi-path optical systems can be constructed and modeled much more conveniently.

Some examples of such systems are the Herrig Schiefspiegler Telescope,
Herrig Schiefspiegler Telescope

Offner systems,
Analysis of an Offner System with Non-Sequential Field Tracing

and interferometers, like the Mach-Zehnder.
Mach-Zehnder Interferometer

As a result, many practical applications based on multi-path interference effect can be easily analyzed.

For example, the optical topography scanning with a Michelson interferometer,
Optical Topography Scanning Interferometry

or the Examination of Sodium D Lines with Etalon, are demonstrated in VirtualLab.
Examination of Sodium D Lines with Etalon

Furthermore, non-sequential field tracing plays an indispensable role for the modeling and design of waveguide-based near-eye-display (NED) systems. The folding of light paths and the extension of the exit pupil in such systems,

are achieved with Light Propagation through Waveguide with In- & Outcoupling Surface Gratings.
Light Propagation through Waveguide with In- & Outcoupling Surface Gratings

The same as with the etalon, VirtualLab facilitates the Analysis of Folded Imaging System with Planar or Curved Waveguide.
Analysis of Folded Imaging System with Planar or Curved Waveguide

Learn more about the background of VirtualLab Fusion Technologies.

Want to give it a try yourself? Get your free trial download!

Topography Scanning Interferometry and Fabry-Pérot Etalon

[May 04, 2018]

 

As one of the most fundamental optical metrology techniques, interferometry has enabled various applications. We present here two examples of topography-scanning interferometry: one for surface-profile measurement, and the other for spectral measurement with a Fabry-Pérot etalon. Thanks to the non-sequential extension, the optical setups for both applications can be easily configured in VirtualLab. The working ...

[May 04, 2018]

 

As one of the most fundamental optical metrology techniques, interferometry has enabled various applications. We present here two examples of topography-scanning interferometry: one for surface-profile measurement, and the other for spectral measurement with a Fabry-Pérot etalon. Thanks to the non-sequential extension, the optical setups for both applications can be easily configured in VirtualLab. The working principles are clearly demonstrated and visualized, and we show how the non-sequential field tracing technique facilitates the fast and accurate analysis of such systems.

Optical Topography Scanning Interferometry

A Michelson interferometer is constructed, with a low-coherence Xenon lamp as the source, for the precise scanning of the surface profile of a given specimen.

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Examination of Sodium D Lines with Etalon

A silica-spaced etalon is set up and employed in the measurement of the sodium D lines, using the non-sequential field tracing technique in VirtualLab Fusion.

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Multi-Path Optical Systems and VirtualLab Fusion Technologies

[April 26, 2018]

 

Interferometry techniques are widely used in many fields, such as astronomy, metrology, and quantum mechanics. In an interferometer, the incoming light is split into two (or even more) beams. The split beams will travel along different paths which eventually overlap, their superposition generating an interference pattern which can be used for further analysis. Now, with the non-sequential extension, such multi-path ...

[April 26, 2018]

 

Interferometry techniques are widely used in many fields, such as astronomy, metrology, and quantum mechanics. In an interferometer, the incoming light is split into two (or even more) beams. The split beams will travel along different paths which eventually overlap, their superposition generating an interference pattern which can be used for further analysis. Now, with the non-sequential extension, such multi-path optical systems can be easily set up and modeled in a more convenient way in VirtualLab.

Mach-Zehnder Interferometer

A Mach-Zehnder interferometer is constructed and simulated in VirtualLab. We perform an analysis of how the tilt and shift of an optical element affects the interference pattern.

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VirtualLab Fusion Technologies — Collection of Research Papers

As a very innovative software, VirtualLab has experienced major technical developments in recent years. Thus, we would like to provide you with a compact overview of VirtualLab Fusion’s theoretical and technological background, in connection with references for a more in-depth study.

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