Hello there,
I have been experimenting recently with the DLP2010NIR and I consistently get absurd results above 1650nm. I tried with different kinds of samples (plastics, wood, skin) and in all cases there a huge drop in reflectance.
When looking in depth at what could cause this, it appears that the values of the reference signal are different from one measure to another while I did not touched the calibration parameters.
The shape of this reference signal stays roughly the same thought. The absurd measurements seems to come from this reference signal getting too close to the sample one on this wavelength area.
The thing is I need to study a reflection peak around 1680nm. What could fix my problem ?
I tried to use another calibration than the factory's one, and it got worse: below is an exemple of what I got.
Wavelength (nm) | Absorbance (AU) | Reference Signal (unitless) | Sample Signal (unitless) |
1674,16587 | 0,145373 | 245817 | 175889 |
1677,12038 | -inf | 0 | 156068 |
1680,07059 | -inf | 0 | 136024 |
1683,0165 | nan | -2147483648 | 116812 |
1685,9581 | nan | -2147483648 | 99065 |
1688,8954 | nan | -2147483648 | 83525 |
1691,82839 | nan | -2147483648 | 70496 |
1694,75708 | nan | -2147483648 | 59851 |
1697,68146 | nan | -2147483648 | 50694 |
1700,60154 | -inf | 0 | 43041 |
Thank you for your help.
Best regards
Elliot