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DAVIDG
Pooh-Bah
Reged: 12/02/04
Posts: 1446
Loc: Hockessin, De
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Re: Spectroscope calibration
07/04/08 12:22 AM
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The pivot needs to in the middle of the front surface of the grating. The arm can be attached on either the front or the back it makes no difference.
I would use the sodium doublet, no mistaking it, and the green mercury line at 546nm and again it stands out well. Both are almost alway present in any common energy saver lamp. You can always use the primary calibartion source, the Sun and Sodium lines and any of other Franunhofer lines.
- Dave
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Homemade 'scopes 8"f/7,6" f/5", 6"f/4, 4.25" Schief. 60mm Coronagraph,60mm H-alpha system, 4.25" White-light Solar Newtonian,solar spectroscope, 4.5" f/16 Schupmann Medial refractor, 14 Stellafane awards 7 in optics
Engineering = Taking what you have and making what you need.
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