How to Create Complex Lens Geometries for Ray Optics Simulations

Stuart Barnes May 7, 2018

The Ray Optics Module extends the modeling capabilities of the COMSOL Multiphysics® software to include ray tracing simulation. This module makes it possible to accomplish advanced thermal, structural, and other studies of complex optical systems in an integrated software environment. The first step in a successful simulation is the creation of the model geometry. This blog post examines how to create a complex lens geometry, using the Petzval lens as an example.

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Christopher Boucher April 20, 2018

Attitude detection, the measurement of an object’s orientation and rotation in three-dimensional space, is a crucial element in aircraft and spacecraft navigation. Recently, ring laser gyroscopes and fiber ring gyroscopes have proven to be viable alternatives to traditional mechanical gyros for accurately measuring rotations. The fundamental operating principle of such devices is an optical phenomenon called the Sagnac effect. In this blog post, we’ll employ ray optics simulation to observe this effect in a basic Sagnac interferometer.

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Caty Fairclough January 10, 2018

11 light-years away from our solar system, an exoplanet called Ross 128 b orbits a red dwarf star. This planet has the potential to support life and is the second-closest temperate planet discovered, with a surface temperature that might be similar to Earth’s. Astronomers detected Ross 128 b by using data from an échelle spectrograph called HARPS. To further advance the search for Earth-mass exoplanets, we can improve the sensitivity of échelle spectrographs using the COMSOL Multiphysics® software.

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Caty Fairclough September 29, 2017

Fusion energy is 30 years away — and always will be. The joke certainly rings true for inertial fusion energy (IFE), which must overcome a number of obstacles before it can become a reality. For example, the current methods for creating IFE targets cannot meet the predicted demand and cost requirements. To solve this problem, researchers designed a new microfluidics method that could address these production bottleneck issues while complying with the strict geometrical requirements of IFE target design.

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Yosuke Mizuyama June 15, 2017

The laser is one of the most useful inventions in modern science, but it is not an easy device to use. Lasers work only when the cavity mirrors are aligned perfectly. Even if a laser is lasing for a while, it can stop all of a sudden. In today’s blog post, we will talk about how to predict laser stability using the ray tracing capabilities in the COMSOL Multiphysics® software.

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Yosuke Mizuyama June 13, 2017

Ray tracing is an effective tool for high-frequency optics simulations. The Ray Optics Module for the COMSOL Multiphysics® software uses a multiphysics-capable wavefront method for its ray tracing. In this blog post, we’ll explore what makes the ray tracing algorithm in COMSOL Multiphysics distinct from traditional ray tracing algorithms described in standard geometrical optics textbooks and suggest a series of best practices to help you get the most out of your simulation results.

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Caty Fairclough May 29, 2017

When designing a solar dish receiver, you may need to rerun your simulation multiple times to find an optimized design iteration. To save time, you can build an app that enables you to rapidly test different geometries and more easily create improved designs. Let’s explore a new simulation app in COMSOL Multiphysics® version 5.3, the Solar Dish Receiver Designer, which you can use as inspiration for building apps of your own.

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Christopher Boucher May 2, 2017

The release of version 5.3 of the COMSOL Multiphysics® software includes a new Ray Termination feature to simplify the setup and results analysis for optical simulations with the Ray Optics Module. Use the Ray Termination feature to remove rays that are no longer relevant to the solution, either because they have escaped from the geometry or their intensity is negligibly small. In this blog post, we’ll learn how to use this feature and see how it simplifies ray optics simulation.

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Andrew Strikwerda January 30, 2017

Welcome back to our discussion on multiscale modeling in high-frequency electromagnetics. Multiscale modeling is a simulation challenge that arises when there are vastly different scales in a single simulation, such as the size of an antenna compared to the distance between the antenna and its target. Today, in Part 4 of the series, we will examine how we can construct a multiscale model by coupling a Full-Wave antenna simulation with a geometrical optics simulation using the Ray Optics Module.

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Andrew Strikwerda January 18, 2017

In Part 3 of our series on multiscale modeling in high-frequency electromagnetics, let’s turn our attention to the receiving antenna. We’ve already covered theory and definitions in Part 1 and radiating antennas in Part 2. Today, we will couple a radiating antenna at one location with a receiving antenna 1000 λ away. For verification, we will calculate the received power via line-of-sight transmission and compare it with the Friis transmission line equation that we covered in Part 1.

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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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