How do I record from two spectrometers simultaneously
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I am running two OceanOptics Spectrometers with the instrument control toolbox, and need them to record at the same time
With the function below, a given spectrometer (object) will run for a set number of iterations, and plots the spectrum. The sampling time is preset outside of the function. A slight variation is when I save the spectrum, but I don't think needs including here.
The invoke('getSpectrum') begins it recording, and then creates an array with one value per detector pixel. The issue is that if I want to run two objects within the same loop, it records the first, then records the second etc.
I've tried looking at the parallel processing toolbox but the only information I found was on running two functions that return data, which is not the case for this particular function
function spectrometerLive(iterations, spectrometer)
spectrometerIndex = 0;
channelIndex = 0;
wavelengths = invoke(spectrometer, 'getWavelengths', spectrometerIndex, channelIndex);
figure();
for i = 1:iterations
spectralData = invoke(spectrometer, 'getSpectrum', 0);
plot(wavelengths,spectralData)
title('Optical Spectrum');
ylabel('Intensity (counts)');
xlabel('\lambda (nm)');
grid on
axis tight
drawnow
end
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Dhruv
am 25 Apr. 2023
1 Stimme
To record from two OceanOptics spectrometers simultaneously, try following the below steps:
- Create two instances of the instrument control toolbox for each spectrometer, and assign them to separate variables (e.g., spectrometer1 and spectrometer2).
- Retrieve the wavelengths of both spectrometers using the getWavelengths function.
- Create a figure to plot the spectra from both spectrometers.
- Use a loop to acquire data from both spectrometers simultaneously. Inside the loop, call the getSpectrum function on both spectrometers and store the returned data in separate variables (e.g., spectralData1 and spectralData2).
- Plot both spectra in the same figure using different line colors or styles to distinguish between them.
I hope that the steps outlined above will help you with the solution you are looking for.
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