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DLPNIRNANOEVM: Extending spectra to 900-2390nm by combining CSV file on Nano and EVM

Matt Gonzales
Prodigy 120 points
Part Number: DLPNIRNANOEVM


Hi everyone, 

We have both the NIRscan Nano (900-1700nm) and the NIRscan EVM (1350-2390nm) in our lab. Using a transmission measurement and the Optecks transmission module for the Nano - can I extend my NIR spectrum from 900 to 2390nm by simply combing both CSV files from the Nano and high performance EVM?

Although I'm sure I can simply paste the values from one file into another (ie. combine CSV file) - I'm not sure if I need to take into consideration alignment issues due to the different optics in both spectrometers. 

  • 0
    TI__Mastermind 23090 points

    Hello Matt,

    Welcome to DLP forum and thank you for your interest in DLP technology. Only "Absorbance" can be compared across two systems.  It is an interesting idea and I have never tried it. I would keep the sampling method similar between system. It means you need to use transmissive head on DLP NIR Scan Nano EVM.

    Sample presentation has significant impact on NIR absorption. Two different sample presentation method will show different absorbance pattern.

    You do have a overlap region between these two systems, 1350 to 1700 nm. Compare the absorbance plot for a sample on this two systems. If they are similar then you should able to build an extended range  absorbance plot. 

    Typically , the noise is high at boundary of the range. You may want to discard say around 50 nm form either side of the overlap band for comparison.

    Please let us know how it goes. Love to see you result.

    All the best.

    regards,

    Vivek

  • 0 in reply to Vivek Thakur
    Prodigy 120 points

    Hi Vivek, 

    Thank you so much for your input. Yes, I will use the same sampling method in both cases. I believe I heard there are some  industrial spectrometers that have two different detectors (eg. InGaAs, PbS) and they simply 'splice' the spectrum to extend the range. 

    I'll let you know and post an update here. We're still waiting for our Nirscan high performance EVM to arrive next week. 

    Thanks again, 

    Matt

  • 0 in reply to Matt Gonzales
    TI__Mastermind 23090 points

    Matt,

    Thank you. Will wait for your findings.

    regards,

    Vivek