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Images measuring light intensity

Thank you very much Kyle97330. Actually I'm not going to record the beam profile or things like this. I'm just characterizing a microscope objective with a laser and the approach is to measure the relative intensity of laser with different incident angles. It means that even the exact intensity is not important for me but the relative changes dependent on different incident angles. So my question was that if I could extract information of intensity changes from saved camera images.
For now, I am putting the camera mode in monochrome 8bit mode and I am getting the 2D array directly from camera and saving that as a PNG file and then using IMAQ module I am processing the image. I just had this doubt about the sensor response if it is linear or not and by using a power meter I found the response is linear.

Cheers

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