People & Pointers
Use this space to show off your skills, introduce yourself, or to chat about the latest in the world of optics.
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This thread will be used to collect questions before the webinar, and to answer any questions we received during the webinar. Feel free to post your questions! Be sure to subscribe to this thread if you want to see additional discussion regarding this topic. The thread will be open to comments until Thursday, May26th. Register here Date: Thursday, May 19thTime: 6:00am PST & 11:00am PSTPresenters:Hui Chen, Senior Application Engineer Taylor Robertson, Senior Application EngineerAbstract: In this webinar, we will examine how the portfolio of Ansys Optics tools offers a complete workflow for the design of metasurfaces, or metalenses. These revolutionary ultra-thin optical components can be used to manipulate light in the visible and IR range for many applications, including smartphone cameras, AR/MR displays, 3D sensing and face recognition. Because of the sub-wavelength nature of metasurfaces, it is critical to use a combination of electromagnetic field solvers (Ansys Lumerical FDTD
This thread is dedicated to today’s webinar: OpticsBuilder for Creo Product Tour. Any questions received during the webinar will be responded to as a reply on this thread. Feel free to post your own questions! The speaker will be notified and will respond as long as the thread is still open.Be sure to subscribe to this thread if you want to see additional discussion regarding this webinar topic. The thread will be open to new replies until Thursday, May 17. Webinar detailsDate: Thursday, May 12thTime: 6:00am & 11:00am PDTPresenter: Lisa Clauson, Senior Product Manager at Ansys ZemaxAbstract: Join Lisa Clauson, Ansys Zemax Senior Product Manager, as she demonstrates how to simulate the impact of mechanical designs on optical performance with Ansys Zemax OpticsBuilder, a certified PTC technology partner. OpticsBuilder enables better communication and eliminates inefficiencies in the optical design process between optical engineers and CAD users. OpticsBuilder addresses all issues ass
This thread is dedicated to the upcoming webinar: Laser Applications with Ansys Zemax. Any questions received during the webinar will be responded to as a reply on this thread. Feel free to post your own questions! The speaker will be notified and will respond as long as the thread is still open.Be sure to subscribe to this thread if you want to see additional discussion regarding this webinar topic. The thread will be open to new replies until Friday, May 6th. Webinar detailsRegister here: [The webinar has concluded]Date: Thursday, April 28thTime: 6:00 - 6:30 AM PDT | 11:00 - 11:30 AM PDTPresenter: Flurin Herren, Application Engineer II at Ansys ZemaxAbstract: Laser beam propagation requires unique considerations when setting up models in optical design software. OpticStudio has a wide range of tools and capabilities for modeling laser applications. This webinar demonstrates various laser applications and components that can be simulated using OpticStudio.
Tech Tip Tuesday 5-10-22 Photolithography; a workflow with STAR & Fluent Photolithography can be used to pattern wafers for semiconductor applications today, but it’s history goes back a lot further than that. Around the time that Joseph Niepce a French inventor created the halftone process for photography, two French printers Alfred Lemercier and Alphonse Poitevin began putting it to use experimenting with photolithography. The technique originally involved a stone plate with water and light, which is where the name comes from, it is Greek, photo = litho, and graphy = stone. The technique of photolithography would be used for engraving from the 1800’s through the 1900’s. By the 1950’s Jay Lathrop and James Nall who were working for the military at a group that would later become part of the ARL (Army Research Laboratory) would use the technique to miniaturize electronic circuits, giving us the first application of how we use it with semiconductors today.The process used for
This thread will be used to collect questions before the webinar, and to answer any questions we received during the webinar. Feel free to post your questions! Be sure to subscribe to this thread if you want to see additional discussion regarding this topic. The thread will be open to comments until Thursday, May12th. Webinar details:[The webinar has concluded]Date: Thursday, May 5thTime: 6:00am PST & 11:00am PSTPresenters:Hui Chen, Senior Application Engineer Taylor Robertson, Senior Application EngineerAbstract: Complex optical systems require coupling simulation techniques across multiple length scales for accurate design and tolerancing. Extracting the light from nanoscale emissive structures in illumination systems, or propagating light through a mixture of guided and free space components are just a few examples.Ray tracing approximations break down near the dimension of the wavelength, and electromagnetic approaches are too expensive for larger devices. Traditional methods
To evaluate system throughput, there are 4 tools you can consider in OpticStudio Sequential mode, Footprint diagram, Vignetting Diagram, Geometric Image Analysis (GIA), and Transmission analysis. The Footprint Diagram and Vignetting Diagram deal with vignetting only and does not consider the Fresnel reflection or bulk absorption losses. They show what fraction of the launched rays are being blocked off/vignetted due to surface apertures. The GIA can do the same thing, but it can also consider Fresnel reflection and bulk absorption losses if you check the Use Polarization button. And the Transmission analysis always includes Fresnel reflection loss and bulk absorption loss. For example, in this system below, at the edge of the field 30deg, the Footprint diagram, the Vignetting Diagram, and the GIA (bottom reports “Percent efficiency %”, Use Polarization not checked) all report very similar system throughput. If you check Use Polarization in GIA, then it’ll consider the Fresnel reflectio
We’ve introduced an Off-Axis Mirror object in nonsequential mode. It has some advantages for users:The object has a coordinate system that is at the center of the off-axis part. (See sketch below.) This makes tolerancing and moving the part easier, because there’s no need to define motions with respect to the parent vertex. It also means that the edges of the part’s substrate are perpendicular to the surface slope at the vertex. This is more realistic for parts that are polished directly onto a blank (versus small parts that can be cut out of a parent part). It is simpler to define the off-axis apertures. The part supports native elliptical and rectangular apertures (including circular and square). The object simplifies the nonsequential editor, since a Boolean is not required to define the aperture. Definition of the off-axis coordinate system for the Off-Axis Mirror in nonsequential modeA shaded model view of the Off-Axis Mirror object
This thread is dedicated to today’s webinar: The Hidden Cost of CAD Time. Any questions received during the webinar will be responded to as a reply on this thread. Feel free to post your own questions! The speaker will be notified and will respond as long as the thread is still open.Be sure to subscribe to this thread if you want to see additional discussion regarding this webinar topic. The thread will be open to new replies until Friday, April 29th. Webinar detailsDate: Thursday, April 21stTime: 6:00am & 11:00am PDTPresenter: Lisa Clauson, Senior Product Manager at Ansys ZemaxAbstract: Join Lisa Clauson, Ansys Zemax Senior Product Manager, as she explores the hidden costs of traditional workflows that bring optical designs to a finished product. Most optical design teams have learned to accept their current workflow inefficiencies as the cost of doing business. Few realize the true costs of maintaining status quo when new technology is available to automate tedious tasks, improve
This thread is dedicated to the upcoming webinar: Using Skew Rays to Model Laser Beams. Any questions received during the webinar will be responded to as a reply on this thread. Feel free to post your own questions! The speaker will be notified and will respond as long as the thread is still open.Be sure to subscribe to this thread if you want to see additional discussion regarding this webinar topic. The thread will be open to new replies until Friday, April 22nd. Webinar detailsRegister here: [The webinar has concluded.]Date: Thursday, April 14th. Time: 6:00 - 6:35 AM PDT, and 11:00 - 11:35 AM PDTPresenter: Paul Colbourne, Senior Optical Designer at LumentumAbstract:In this webinar, Lumentum’s Paul Colbourne will describe how to use skew rays to model Gaussian beam propagation in OpticStudio. Skew rays are an efficient and accurate representation of Gaussian beams and can be used to quickly optimize for best focus or to minimize aberrations. Paul will demonstrate how to set up User-
Apologies for butting into the normal optical engineering content. On Sunday 22nd May 2022, I am joining The Distinguished Gentleman's Ride with fellow men and women across the globe to raise funds and awareness for prostate cancer and men's mental health. Men die on average 6 years earlier than women and for largely preventable reasons. The number of men that are suffering is growing, and we need to do something about that.I would be very grateful if you would be willing to sponsor me by a small amount. Yes, I know you're sponsoring me to ride a motorcycle around San Diego, and that's not the hardest gig in the world. But raising awareness of both prostate cancer and suicide prevention is surely a good thing, huh? Sponsor me a few bucks here:https://www.gentlemansride.com/fundraiser/MarkNicholson153916
Top Tip Tuesday Ansys Mechanical and OpticStudio STAR ModuleAs many know, the OpticStudio STAR module has always been FEA agnostic. Integration with other Ansys tools has lead to a workflow that streamlines the process and allows greater fidelity.Design, optimize and perform tolerancing as you typically would in OpticStudio. Build CAD and other mechanical components, including those interacting with optics. Note; OpticsBuilder, SPEOS, SpaceClaim, Mechanical, Discovery and other tools can help facilitate this need depending on the specific case. Export the design for FEA analysis. Bring the components from OpticStudio and CAD into Ansys Mechanical, materials and initial conditions can also be imported.It is possible to leverage WorkBench, bringing in any physics that are necessary, Fluent, Mechanical, Icepack, etc. What if studies are made easy with WorkBench as variables are parametrized and can be passed between programs.Define the mesh and apply mesh control with a finer mesh in are
The definition of a solid angle can be found in the Wiki.https://en.wikipedia.org/wiki/Solid_angleFrom the Wiki, you may know a solid angle can be calculated from the following formula.（Eq.１）And the relationship between (θx,θy) and (θ,φ) is as shown in the following equation.The variables in (Eq 1) are (θ,φ). We will convert them to (θx,θy) by the way of variable transformation.https://math.libretexts.org/Courses/Monroe_Community_College/MTH_212_Calculus_III/Chapter_14%3A_Multiple_Integration/14.7%3A_Change_of_Variables_in_Multiple_Integrals_(Jacobians) Finally we can get the result as below.（Eq. 2）(Eq. 2) can be used to calculate the solid angle from a specific pixel coordinate.However, there is no analytical solution for this equation. We know that a numerical solution can be calculated.In fact, our algorithm is not this method. When OpticStudio calculate the radiant intensity, a iteration method is used.Theoretically, the result is the same. One of our users has verified this.
This thread will be used to collect questions before the webinar, and to answer any questions we received during the webinar. Feel free to post your questions! Be sure to subscribe to this thread if you want to see additional discussion regarding this topic. The thread will be open to comments until Thursday, March 31st. Webinar details:Register here: [The event has concluded]Date: Thursday, March 24thTime: 6:00am PST & 11:00am PSTPresenters:Tom Pickering, Manager Product Management for Ansys ZemaxJames Pond, Principle Product Manager for Ansys Lumerical Abstract: Optical design has long been constrained by the lack of being able to design the optics and photonic components in one workflow. This webinar explores how the new connection between Ansys Zemax and Ansys Lumerical accelerates optical design time today and in the future. We will showcase some example workflows that combine your optical simulations with other Ansys solutions such as Ansys Speos and Ansys optiSLang to deliv
The details of the webinar are below! This thread will be used to collect questions before the webinar, and to answer any questions we received during the webinar. Feel free to post your questions! Be sure to subscribe to this thread if you want to see additional discussion regarding this topic. The thread will be open to comments for a limited time. Webinar details:Register here: [The event had concluded.]Date: Thursday, February 24thTime: 6:00am PST & 11:00am PSTPresenters:@Jordan.Teich, Application Engineer II @Flurin Herren, Application Engineer II @Matthias.Schlich, R&D Engineer IIAbstract: CubeSats are a class of nanosatellite that are designed to operate within standardized dimensions of 1U cubes (10 cm x 10cm x 10cm). They can vary in size from 1U to 6U payloads. In the aerospace market, CubeSats have emerged as a lower cost solution for space-based optical systems. To design a CubeSat system, a workflow needs to be defined for developing the optical design, opto-mecha
This thread will be used to collect questions before the webinar, and to answer any questions we received during the webinar. Feel free to post your questions! Be sure to subscribe to this thread if you want to see additional discussion regarding this topic. The thread will be open to comments until Thursday, March 17th. Webinar details:Register here: [The event has concluded]Date: Thursday, March 10thTime: 6:00am PST & 11:00am PSTPresenter: Bob Householder, Senior Product Sales ManagerAbstract: Micro-optics for medical devices carry a higher burden than commercial or industrial applications where sterilization, compliance and materials play a greater role. In this talk, a generic set of opto-mechanical requirements will be studied to show the process of optical form and design through opto-mechanics, tolerance analysis and production considerations. This practical approach will reveal the top lens design forms and build on the initial design to construct an opto-mechanical sub-
Tech Tip Tuesday 3/15/22Robotic surgery is becoming increasingly prevalent within the medical field, and optics plays an important role within these devices. There are a few areas that optics touch in the medical field with respect to robotic surgery. Other articles and posts have touched on the use of endoscopic cameras and machine learning. Photoluminescence is another topic in this field in the form of phosphorescence and fluorescence modeling to simulate the use of contrast dyes to highlight cavities or vessels. There are also fiber and laser applications for use with both scalpel and cauterization, which will be examined in other articles. This also ties back to other topics we have written on, including tissue modeling. We will now take our human tissue model a step further with the inclusion of blood vessels and contrast dye, which can help highlight the blood vessels or other cavities in the flesh. Revisiting our simple tissue model from last month, you may recall that we had
Optimization is extremely important in a computer-aided design. However, it's never as easy as just a click on a button. We usually need to carefully set up the variable and merit function. While there are no a general rules to follow for all systems, there are still some useful trick to follow for most of common cases. Here I'm sharing some from my experience. If you put yours in reply, I will also update this thread.:) [Michael Cheng] 1. Keep this in mind: Always check and consider whether a variable is really required to be a variable. * If the variable won't changing system performance much, turn off it first. You can turn it on at final stage for a fine tune. A typical case is the thickness of a lens. In many cases, they contribute much less than those AIR thicknesses in the system. * Before careful that, if you have a redundant variable, for example Radius on an isolated STOP, the optimizer may be confused and just cannot work well. * If during optimization, a variable just
Here is a quick note about two frequently asked questions.How to set up the parameter Holo type and Diffract order for the surface Optically Fabricated Hologram (OFH) How to set up a reflection hologram using OFHBefore read this post, make sure you have read the following KBA. That is the background knowledge to this post:How to model holograms in OpticStudio Difference between OFH and other hologram typeFor other hologram models, we only assume the construction systems are composed by two converging or diverging source. (A collimated source is considered as case the converge/diverge point is at far point.) However, in real world, they are built with same laser with some lenses. And there the source is actually not a point but has some aberrations. Sometimes these aberrations are intentionally introduced to correct the aberrations that come in playback systems. The parameter 'Holo type'For OFH, the rule for Holo type is a little different compared to other hologram models. Normally,
In the following article, we introduced how to build an EPE based on surface-relief grating (SRG). However, this does not work for holographic gratings.How to simulate exit pupil expander (EPE) with diffractive optics for augmented reality (AR) system in OpticStudio: part 1The current available Kogelnik model in OpticStudio cannot be used for EPE waveguide. Here we will explain why and provide a workaround DLL. Note this is based on assumptions and the result could be inaccurate.In Kogelnik’s method, it assumes, as below, that the refractive index of the hologram itself and its environment are same. Even after the hologram fringes are developed, the average refractive index is still same.However, in reality, the refractive index from the environment is different.For example, we might have a hologram, with average refractive index of n0 = 1.5, coated on a glass substrate, with refractive index of n1 = 1.7. And the other side is AIR, with refractive index of n2 = 1.0.In real situation, t
In Q3 2021, Zemax partnered with the Optica Foundation to identify and support exceptional optics-focused students in emerging economies. I’m very excited to have these individuals join our ranks within the Zemax user community, and I hope that everyone will join me in welcoming and mentoring them.Samuel ( @sizapatav23 ) - Jesus ( @cansecodiaz ) - Naresh ( @Naresh.Kumar ) - Anda-Maria ( @Maria T ) - Adewale ( @adewale ) - Melvin ( @Melvin.James ) For the students, please reply on this thread to tell the community a bit about yourself! I think we’d all like to know…Degree you’re pursuing Your academic institution What are your passions within the field of optics? What do you hope to study or learn with your OpticStudio software? Is there anything you’d like to ask of the community members?
Tech Tip Tuesdays with Zemax: Human Tissue Modeling In my last article I wrote about the power of custom coatings in OpticStudio, how to create them and the ramifications of model detail. OpticStudio has a lot of breadth, and this allows a user great flexibility when creating a model. In this example, we’ll explore how you can extend a model with simplistic assumptions to a more complex multi-physics model using more realistic conditions or even incorporate measured data. The materials catalog can be found under the Libraries tab, then Materials Catalog OpticStudio has extensive catalogs of materials and their associated optical properties. Model materials may also be created to address unusual needs not covered by optical catalogs. This allows the user to define custom materials for nearly any discipline, such as heat shields, fiber for lasers, and even human skin. In the case of human skin, each layer can be accounted for independently and the data can be saved as a new mat
Dear all!Greetings of the day! Hope this mail finds you well. Open for the Optical Design Engineer opportunity. To catch your attention I would like to brief in very simple words about my expertise. With a strong background in Microelectronics and VLSI at post graduate level where I completed my project on designing a dynamic latch comparator from RTL to GDS flow using Synopsys Galaxy custom designer 32 nm PDK. Followed by my doctoral (pursuing since 2018) in computational modeling of Nanophotonic Image sensors with a good record of certifications in using industry standard simulation tools (ANSYS Lumerical, HFSS) and Zemax (Optistudio). Above all, my love for learning new IC technology encouraged me to complete the risc-v-myth-workshop by VSD-Design and RedWoodEDA, where I was recognized by the trainers as top performers. I have also supervised two VLSI Post graduates back in 2016-17 session.Some of my top certifications are listed below: CUSTOM LAYOUT -VSD DESIGN - UDEMYMUTx: PHOTO
Heart rate sensors are often included in wearable tech devices. What is the technology that enables us to measure the heartbeat with our smartwatch or fitness tracker? How can we simulate it with Zemax OpticStudio? Photoplethysmography (PPG) is a low cost, non-invasive optical technology that takes physiological measurements on the surface of the skin. PPG devices consist of infrared or visible range light-emitting diodes (LEDs) and photodetectors. They provide a simple optical technique to detect blood volume changes in tissues. Light is more strongly absorbed and scattered by blood than by the surrounding tissue. Therefore, the pulsation of blood causes a variation of opposite phase in the signal of the detector.How to implement a human skin tissue model in OpticStudio, and how to simulate the measured signal of a PPG device over time using a ZOS-API application is described in detail in our Knowledgebase article.Light scattering by small particles in turbid media, such as in biolog
I will be hosting a webinar on modelling Infrared thermal detectors in OpticStudio. The details of the webinar are below! This thread will be used to collect questions before the webinar, and to answer any questions we received during the webinar. Feel free to post your questions! Be sure to subscribe to this thread if you want to see additional discussion regarding this topic. The thread will be open to comments until Thursday, January 27th. Webinar details:Register here: [Event has concluded, registration is no longer available]Date: Thursday, January 20thTime: 6:00am PST & 11:00am PSTPresenter: @Csilla Timar-Fulep, Senior Application Engineer for Ansys Abstract: In this webinar we will demonstrate how to model infrared thermal detectors in OpticStudio. We will first discuss how to describe thermal radiation accurately by blackbody sources. Then, we will show how to simulate the temperature calibration process of thermal detectors via the ZOS-API to enable not only qualitative a
In a previous tech tip, we discussed the importance of the choice of materials and coatings for infrared (thermal) systems in achieving an optical system design to match imaging performance targets. But the story doesn’t end with the optical components; an accurate representation of the blackbody emitter and detector are also required! Modeling a radiating objectThermal radiation of objects can be easily and accurately modelled using the Black Body Spectrum setting in OpticStudio, defined by a temperature in Kelvin. As an example, say we are designing a camera to image object radiation in the target temperature range between -45°C and +75°C. We can use Planck’s blackbody radiation law to determine that we need a wavelength range from 3 to 40 μm. OpticStudio then determines the relative weights of each wavelength in this range for the desired blackbody. Blackbody emitter source modelOf course, to properly model the system, the material information needs to cover the whole range of wavel
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