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Jeff,
Not quite right yet...
You should be getting far clearer and tighter focus on the Neon lines..
The resolution FWHM I'd expect to be down around 3A. Running the numbers through SimSpec V3.2 it gives 2.7A
The slit alignment to the grating and the slit width may be an issue as well as the focusing of the camera lens
Don't take my comments as being critical of your work; this is very typical of the testing and fine tuning cycle that goes on with EVERY new spectroscope - believe me!!!!
You and I both know that in the end you'll have a very good capable spectroscope....you just got to get there.
( looking closely at your photo..why is the collimator lens not showing a focus on infinite? trying to compensate for the back focus to the slit??? May have an effect....)
Last edited by Merlin66; 20-09-2009 at 09:29 PM.
Reason: collimator setting comment added
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