Quote:
Originally Posted by Merlin66
I use an ATIK 314L, ASI 1600MM and ASI 174MM for spectroscopy the QE curves just give some signal down around 370nm, below that the atmospheric transmission starts to kick in - the combo work against imaging in the far UV.
Most objectives (and obviously mirrors) will allow some imaging in the UV.
This spectrum of Sirius was taken with the Genesis and ATiK 314.
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So you're saying even without the sensor window cutting the UV the CMOS sensitivity just drops off regardless?
Looking at the graph for the 1600MM, it would still only get me to around 30% of peak efficiency, so that would make sense.
I don't know much about spectroscopy so I'm not sure how to read the image you posted. The bottom scale is tenths of a nM/? It looks like the amplitude drops off as the wavelengths get shorter, but I don't know enough to guess if this is attenuation from the imaging train, or just black body radiation curves?
Cheers
Markus