Quote:
Originally Posted by p1taylor
Hi Stu, As you say I will sort light ingress, sorry but I am afrad I don't know any thing about how to setup spectroscope what is [ dispersion of the set up?] is there any where I can get the info, the NEON I have in is not very barite it is out of a screwdriver have a beter one coming.
peter
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I have attached a picture to help you Peter. A quick neon lamp spectrum calibrated on 2 lines for clarity. You will see the dispersion of the set up I used (yours will differ) at the bottom of the BASS screen (see attached picture).
Once you have written that number down, you can go to your original spectrum and do a "one point" calibration (this assumes you know what one of the lines is, or likely to be). Click "finish one point calibration" and BASS will ask you to enter the dispersion factor from your neon. Et voila, hopefully you will have a good calibration. Try something obvious first, like a HPS street light and see if youre getting ball park dispersions (then you know if your guesswork with the lines is correct or needs adjustment)
Hope this is helping and not confusing you more! Again, like Julian, i'd recommend Ken Harrison (Merlin66) books on spectroscopy.