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 Post subject: spectroscope
PostPosted: Fri Feb 08, 2013 3:14 pm 
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Joined: Sat Aug 06, 2011 10:43 pm
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The little handheld spectroscope I have is just about useless.
The field of view is narrow and any absorption lines are not
discernable. I am contemplating the purchase of what I would
hope to be more effective equipment; however, I do not want to
spend a lot on something that turns out to be no better. Any suggestions?


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 Post subject: Re: spectroscope
PostPosted: Sat Feb 09, 2013 11:10 am 
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Joined: Sun Oct 16, 2005 12:22 pm
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Location: San Francisco
What kind do you have now?
Is it prism or diffraction grating? Can you focus it and adjust light?
What happens when you view fluorescent overhead lights with your spectroscope? See some absorption bands then?

I am fond of the OPL teaching spectroscope with stand.


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 Post subject: Re: spectroscope
PostPosted: Sat Feb 09, 2013 12:29 pm 
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Thanks,Barbra, for your comments. My spectroscope is some no- name brand just two inches long,half inch diameter,three eighths
inch aperture, diffraction grating, non-adjustable for focusing. Upon viewing a fluorescent light as you suggested, I observed a much brighter spectrum than with any gemstone, much narrower color bands, and three or four thin black vertical lines in the yellow to red area.

I have wondered about the OPL but have not been able to determine from pictures what its dimensions are nor whether the unit with stand is any larger than the hand-held one.


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 Post subject: Re: spectroscope
PostPosted: Sat Feb 09, 2013 12:47 pm 
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It's larger than yours, but not too large.
OPL also makes a pocket variety.
Image

If you are seeing absorption bands when you look at the fluorescent light source, your spectoscope is working


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 Post subject: Re: spectroscope
PostPosted: Sat Feb 09, 2013 6:48 pm 
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Thanks for your further reply with picture of OPL device.
Is the second object to the right a small flashlight that is
part of the kit, or is it a separate pocket scope?


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 Post subject: Re: spectroscope
PostPosted: Sun Feb 10, 2013 12:29 am 
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It is a Kruss hand held spectroscope. I recently sold it on the GemologyOnline Marketplace.


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