VTT Fabry-Perot interferometer technologies



I'm working as a business development manager at an international company our company works in the field of sensors and measurement systems we provide instrumentation and services to our clients like process industry companies our business has been good and stable but now we want to make us 2d you move towards growth to increase our revenues so I started browsing through the internet and quickly found a finished research and development center called vtt they displayed a miniaturised spectrometer and I know what a spectrometer is I've seen several in various research labs usually being large and bulky this one was a sizeable white board pending including electronics and everything I decided to contact vtt and we booked a meeting in Espoo Finland those spectrometers in general measure the spectrum of light the light consists of several wavelengths of radiation and if all of them are present we perceive the light as white many materials like gases for instance absorb certain wavelengths of this white light depending on the material that you have this means that if you shine white light through a sample and measure the spectrum on the other side you will find some wavelengths being absorbed by the medium now if you change the medium the absorbed wavelengths will be different in fact different substances have well-known fingerprint patterns as they are called and by measuring the spectrum with a spectrometer one can identify the material content of the sample okay so we could easily monitor carbon dioxide levels and buildings for better ventilation learn about the explosion threats and combustible gases and mines and oil fields or measure respiratory gases in hospitals having a low cost small robust multi-material sensors started to look like a good opportunity we have developed tiny tunable optical filters to do the job what you do is that you take two mirrors with special coatings and you place them very close to each other this structure is called a fabry-perot interferometer and it induces a well-known phenomenon only certain wavelengths can pass the device while the others reflect back the transmitted wave length depends upon the gap size between the two mirrors if you have a way to tune the gap you can also tune the wavelength of the transmitted light and you have created yourself a tunable optical filter now if you place this kind of a filter in the optical path followed by a single detector illuminate the sample with white light and tune the filter your detector will pick up the spectrum this system can be made very small as the filters can be only a few millimeters in size in fact we have successfully developed many tunable filters using special micro electromechanical manufacturing methods if you take a closer look of these MEMS field the structure you can see that it can be easily modified in size if you make it large enough you can even replace the single point detector with an imaging detector this way you can build yourself a hyperspectral camera with which you can obtain the spectrum of each of the pixels in your image and analyze the spatial distribution of your measurement target these devices can be used for instance in chemical imaging in the pharmaceutical industry or skin cancer detection however if you have a low-cost mass-producible spectral imager of this size imagine all those new applications that are still waiting to be found now imaging MEMS was something I didn't expect to find that's very excited and asked whether vtt has built other hyper spectral images hyperspectral imaging is a technology of the future for many special applications we have developed another kind of a tunable filter utilizing piezo actuation this component is especially optimized for imaging purposes one of the examples has been to utilize this imager onboard unmanned aerial vehicles and nano satellites the main applications are environmental and agricultural monitoring so VT T's technologies are scalable to many applications all the way from space compatible lightweight cameras to high-volume miniaturized MEMS devices VT T's are also on several patents and extensive know-how on fabric frozen is willing to make license agreements with companies more than half it's easy to start with yes so we you you have probably some idea when you come to us and you are introducing what you would like to study what kind of product you would like to be loped we will set up the project plan together and when we have a good project plan we will set up your official offer and if the over it looks good for you you are placing the order and then we are really do move on to start a project I flew back home and presented this to our management group who is thrilled with the opportunity we immediately realized many opportunities for us and it didn't take a lot of discussion before we decided to start cooperating with VT we're confident that our company gets back to the growth curve thanks to VT T's tunable filter technology

2 Comments

  1. Albert L. S. said:

    You are great on explaining such complex concepts in an easly understandable language. Congratulations!

    June 30, 2019
    Reply
  2. Lance Winslow said:

    Very good, watch this video.

    June 30, 2019
    Reply

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