Ocean Optics spectrometers sample evenly in frequency space, but not in wavelength space. Thus, it is necessary to interpolate my spectral data to even wavelength intervals. This figure shows the results of the interpolation. The blue line is the original spectrum, and the red line is the interpolated spectrum. After all the corrections, I can compute reflectance.
Reflectance is defined as the ratio of reflected to incident light.
In this case, it is the ratio of a coral spectrum to the Spectralon spectrum. This figure shows the calculated reflectances corresponding to to raw data in the first figure. The top panel shows the unfiltered reflectances. The UV-blue region exhibits a large amount of noise. This is due to the relatively low levels of UV and blue light eminating from my light source.