## Studying the Polarization of Light with a Fresnel Rhomb Simulation

##### Christopher Boucher February 27, 2019

A Fresnel rhomb is a simple optical system for studying light polarization. Follow along as we simulate linearly, elliptically, and circularly polarized incident light in a Fresnel rhomb.

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### How to Perform a STOP Analysis with COMSOL Multiphysics®

##### Christopher Boucher November 5, 2018

Interested in structural-thermal-optical performance (STOP) analysis? We go over the theory, background, and how to perform such an analysis in the Ray Optics Module.

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### Ray Optics Simulation of Sagnac Interferometers and Ring Laser Gyros

##### Christopher Boucher April 20, 2018

Have you ever been in a revolving restaurant that slowly spins as you dine? This same concept can be used to understand the operating principles of Sagnac interferometers and ring laser gyros.

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### How to Use the New Ray Termination Feature for Geometrical Optics

##### Christopher Boucher May 2, 2017

You can simplify your optical simulations performed with the Ray Optics Module — including model setup and results analysis — with the Ray Termination feature. Read about how to use it here.

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### Sampling from Phase Space Distributions in 3D Charged Particle Beams

##### Christopher Boucher September 22, 2016

In the previous installment of this series, we explained two concepts needed to model the release and propagation of real-world charged particle beams. We first introduced probability distribution functions in a purely mathematical sense and then discussed a specific type of distribution — the transverse phase space distribution of a charged particle beam in 2D. Now, let’s combine what we’ve learned and find out how to sample the initial positions and velocities of 3D beam particles from this distribution.

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### Phase Space Distributions and Emittance in 2D Charged Particle Beams

##### Christopher Boucher September 19, 2016

Previously in our Phase Space Distributions in Beam Physics series, we introduced probability distribution functions (PDFs) and various ways to sample from them in the COMSOL Multiphysics® software. Such knowledge of PDFs is necessary to understand how ion and electron beams propagate within real-world systems. In this installment, we’ll discuss the concepts of phase space and emittance as they apply to the release of ions or electrons in beams.

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### Sampling Random Numbers from Probability Distribution Functions

##### Christopher Boucher September 15, 2016

In this blog series, we’ll investigate the simulation of beams of ions or electrons using particle tracking techniques. We’ll begin by providing some background information on probability distribution functions and the different ways in which you can sample random numbers from them in the COMSOL Multiphysics® software. In later installments, we’ll show how this underlying mathematics can be used to accurately simulate the propagation of ion and electron beams in real-world systems.

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### How to Model Solar Concentrators with the Ray Optics Module

##### Christopher Boucher June 23, 2016

A paraboloidal solar dish can focus solar radiation onto a small target or cavity receiver. Because solar energy is collected over a large area, the incident heat flux at the receiver is extremely high. This thermal energy can then be converted to electrical energy or used to produce a chemical energy source, such as hydrogen. Today, we discuss strategies for computing the distribution of heat flux in the focal plane of a typical solar dish concentrator/receiver system.

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### Using the New Ray Tracing Algorithm in COMSOL Multiphysics® 5.2a

##### Christopher Boucher June 20, 2016

With the release of COMSOL Multiphysics® version 5.2a, it is now possible to trace rays in unmeshed domains and even release and trace rays outside a geometry. The Ray Optics Module provides an entirely new algorithm that offers these capabilities and more, so that you can model your ray optics designs with ease and accuracy. Let’s investigate how this new algorithm affects your workflow when setting up a typical ray optics model.

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### Evaluating Static Mixer Performance with a Simulation App

##### Christopher Boucher June 8, 2016

Static mixers are well-established tools in a wide variety of engineering disciplines due to their efficiency, low cost, ease of installation, and minimal maintenance requirements. When evaluating whether a mixer can be used for a certain purpose, it is important to determine whether the resulting mixture is sufficiently uniform. In this blog post, we will discuss the setup of an app designed to quantitatively and qualitatively analyze the performance of a static mixer using the Particle Tracing Module.

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### Modeling Thin Dielectric Films in Optics

##### Christopher Boucher May 6, 2015

Thin dielectric films are versatile tools for controlling the propagation of light. They can be used, for example, as anti-reflective coatings to reduce the amount of stray light in a system. They can also be used as low-loss reflectors or as filters to selectively transmit certain frequencies of radiation. Here, we’ll discuss some of the built-in tools that the Ray Optics Module provides for modeling optical systems with dielectric films.

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