Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [spectroscopy]

8 questions
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Interfacing an old spectrometer with PySerial

I asked this question on the Engineering StackExchange and someone said it might be more appropriate here. I want to interface an old Shimadzu spectrophotometer (Model UV-1601, manual here) through its RS-232C port, which is described in the manual…
Omnistic
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On the understanding of signals from an IR detector coupled to a lock in amplifier

I have a CW laser which is modulated by an optical chopper rotating at 1kHz. The modulated CW beam struck a sample holder and the absorption signal is recorder via an Infrared Associates MCT detector. The MCT detector, in turn, is connected to its…
Strelok
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Is there a strategy for reconstructing a circuit given the frequency response?

So I recently worked with a problem where I was given a bode plot where magnitude of the transfer function (the ratio between the output and input voltage) was plotted against frequency of the system. From there, I needed to construct a circuit only…
Tanamas
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How to measure radio wave penetration and reflection through different mediums

I would like to do a few experiments to test how different EM radiation frequencies (915 MHz to 5 GHz) interact with 3D print filament materials (like PLA, PolyCarbonate, TPU, etc...). Specifically I want to measure the signal strength of the…
Spesemper
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Optical filters: What is the difference between Free Spectral Range (FSR) and the resolution based on (FWHM)

I have a question regarding the Free Spectral Range (FSR) and resolution based on (FWHM) of optical filters like based on Fabry-Perot-Interferometers. As of now, I always thought of the resolution as the minimum spacing between two spectral peaks an…
Dakalaom
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How to resample spectral data into intensities of spectral bands for SparkFun spectral sensor?

My end goal is to create a machine learning model that can classify spectroscopic data from the SparkFun spectral sensor (https://www.sparkfun.com/products/14351). Unfortunately, it's infeasible for me to scan thousands of samples of dirt with the…
soravoid
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What should be the output circuit of ADM01 (Bought from Thorlabs) used in QEPAS setup to give signal?

I am working on building a QEPAS setup. I am using HHL-513 as laser and ADM01 from Thorlabs. Inside the ADM01, there is a QTF(Quartz Tuning Fork). Basically, for the setup to work, what we have to do is to make sure the laser passes through the…
Aritra Pal
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Level translator as digital buffer

In the datasheet of the C12880MA (Mini-spectrometer) they recommend using a digital buffer on pins to and from the module (CLK, ST, EOS, TRG): I'm not sure why. In my case, I need level translation anyway. Would a bidirectional level translator…
Francois
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