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Vít Šimurda

Research and Development Engineer


I’m a hard-working and passionate engineer with 4 years of experience in automotive lighting. I specialize in designing optics for signal lighting LED systems, but I also have a lot of knowledge of manufacturing processes, quality control and lab measurements.

I am an author or co-author of cca 10 patents and patent applications. I’m also well versed in data analysis and programming.

I'm an experienced CATIA designer and I've been a part of a software development team that created tool for computation of optical NURBS surfaces using C++ integrated in Catia v5. I've also created several tools for optimization and data analysis using Python.

My experience


R&D Engineer
Varroc Lighting Systems

November, 2015 - October 2019

Exterior Automotive Lighting | Signal lighting

See work for more

Masaryk University Brno
1 year study of Masters Level Plasma Physics

September, 2014 - November, 2015

Plasma Physics

Steamer Properties and Software Development
Passive Current Probe Development

Masaryk University Brno
Bachelor of Science

September, 2011 - September, 2014

Physics

Thin Layer Deposition
Plasma Enhanced Deposition
Electron Microscopy
Surface Treatment

Thesis: Deposition of inorganic polymers on textile surfaces using dielectric barrier discharge (available in Czech)

My Skills


CATIA v5

  • Optical and mechanical design of plastic and aluminium parts
  • Catia Macros
  • Certificate (in Czech)

Lighting Design

  • Computation of NURBS optical surfaces using C++
  • Proficiency with LightTools
  • Design of reflectors, lenses, TIR lenses, Fresnel lenses etc.
  • Backlight design and optimization
  • Thin film design
  • Optical microstructure design
  • Raytracing
  • Renderings

C++

  • Programming of tools used to calculate optical surfaces
  • Optimization tools

Python

  • Data Analysis
  • Catia V5 integration
  • Django

My work

I worked in the R&D Department team at Varroc Lighting Systems that specializes in Signal Lighting and my main focus was optical engineering and programming.

Varroc Surface LED

One of the bigger projects I worked on is Varroc Surface LED technology. The goal of this project was to provide a reasonably-priced alternative to OLEDs for exterior automotive lighting. Surface LED is a thin surface light source, with high luminance, multi-color and 3D shaping capability.

This technology uses a combination of several optical films and outcoupling pattern tailored for every design and outperforms OLEDs in luminance and it is also cheaper.

Innovator of the year 2017, Patent of the Year 2018

Working with new technologies and innovative ideas goes hand-in-hand with patents. I am an author or co-author of several patents that are now owned by Varroc Lighting Systems. These patents include lightguiding systems, illumination devices, use of new technologies, optical systems etc. Varroc has given me two awards Innovator of the Year for 2017 award, mostly for Surface LED technology and Patent of the Year 2018 award.

Photometry Optimization in Catia, Catia macros

Catia is the most widely used CAD software in the automotive industry, but it isn't often used to its' full potential. I have worked extensively with Catia and I've created several useful macros as well as external tools using Python.

I've also developed an optimization tool that was integrated into Catia, that changed certain parameters of a model, preformed ray-tracing of the system and adjusted the parameters according to the results.

Microoptics design

Microoptics is a big topic for the newest products in the industry. Customers are focused or the best possible performance of the systems without any distracting visible elements.

I've designed several microoptics structures which can be manufactured with photolitography or SPDT technology. Some of the results of my work will be shown at the ISAL 2019 conference.

Customer Projects Optical Support

One of the tasks of our R&D team was to support other teams with work on several pre-development and development projects for customers including Škoda, Volkswagen, PSA, Tesla, Ford and others.

This work includes designing of new innovative optical systems but also frequently used optical systems like reflectors, collimators, lightguides etc. using Catia V5. These systems need to be efficient and well-designed to fulfill all the necessary specifications. A lot of attention must be put into making sure that the elements will be possible to manufacture by injection molding or any other cost-effective way.

After the optical parts are manufactured, all the necessary measurements need to be made. These include measurement of luminous intensity distribution with goniophotometer and other important properties like color, efficiency etc.

Prototype Development

Customer demand for new products is always high and they are looking for the best things that market has to offer. Therefore our team always needed to prepare prototypes for customer tech-shows and other events like ISAL or CES. I've worked on several samples and I've been part of the team that presented them directly to customers.

Working on prototype samples doesn't only include design in CAD but also a lot of hands-on experience with prototyping technologies like milling of optical parts also with SPDT technology, 3D printing, Laser marking/cutting etc. I enjoy those technologies so much, that I have a 3D printer of my own at home.

Optical Measurements

Optical engineer has to make sure that his designs and simulations correspond with reality. Only way to do that is to measure manufactured products. Work with measuring devices is therefore necessary.

In automotive lighting the critical physical quantity is luminous intensity. That is measured with goniophotometer. Strict regulations as described in ECE, SAE, CCC and other regulatory standards need to be followed. Other measurements like EPLLA, color shift or luminance for appearance purposes need to be made as well.

Renderings

Preparation of both biased and unbiased renderings using Blender and LuxCore Render

Creation of materials, models and lightsources used for renderings.

Optical Surfaces Computation, Continuous improvements

When developing new innovative technologies, it is often important to calculate optical surfaces with certain properties. This can be a tedious task if performed manually, so more often than not new modules need to be prepared. Module preparation is done with C++ using Varroc's optical surface creation tool and they can be integrated into Catia V5 for easier use.

In certain situations, the optical surfaces need to be optimized with raytracing and evaluation. Lightguide with extracting elements is a typical example where the light hits the surfaces at different angles. For these kinds of situations, software that optimized parameters and evaluated performance was developed using Python.

Another part of core team support was continuous improvement of typically used optical systems (lightguides, lightpipes, reflectors, TIR Lenses, Fresnel Lenses etc.). Several of those attempts resulted in better efficiency and luminous intensity in critical measuring points.

Varroc Lighting Portal / Project Storage Development

When I first arrived at company I had trouble finding a reliable source of information and system for bug reporting or discussing ideas. That became a bigger project later on when Varroc Lighting Portal was developed using Python and Django Framework.

Website is used for sharing news, software updates and other important information throughout the company. It also includes several tools like CIE color space plotting utility, material database, bug reporting system and new features request system.

Other web projects came along. One of them was file-sharing system that is used internally for our team and is tailored to our needs.

Plastic Expertise

Plastic products are key components in automotive lighting. Most of the products are made from different kind of plastics and that needs to be considered during the development phase. Materials need to be analyzed to make sure they work in certain temperatures, have the right optical properties or are suitable for surface treatment. One of the most important part of the design is making sure that parts can be made by injection molding.

Producers of plastics are often developing new products for specific applications and it's important to make sure that they can be used in exterior automotive lighting due to the extreme conditions. Several tests need to be preformed and one of the best ways to make sure that the material is safe to use in exterior automotive lighting is to make sure it can be on AMECA list.

LED Electronics Programming, Android App Development

For CES 2019 my company wanted to showcase new technologies including personalization and controls via smartphone. It was my task to set up the LED electronics and make sure the anyone can control it with their phones.

I have developed an Android app using Kotlin and firmware controlling the LEDs using C.

 

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