Helium-Neon emission lines, visualized through a makeshift diffraction grating (transparent CD-ROM). You can see the 632.8nm laser emission as a dot at the top.pic.twitter.com/gKS1WxYGh9
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Been meaning to ask you if you want a spectrometer module. I bought a bunch of reasonably good resolution ones on eBay (as part of a larger device). There’s a good thread on them here:https://laserpointerforums.com/threads/b-w-tech-spectrometer-473-module-setup-mods-info.101467/ …
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That thread is full of noise, but it sounds cute. How much are they?
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You can just have one I bought like 7, they were something like 20 to 50USD on eBay. Interestingly they were integrated into a pseudo-scientific Raman spectroscopy skin test device, contained lots of nice components however!
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I think there’s a reasonable amount of misinformation in that thread. I have a document somewhere describing the protocol, it seemed pretty straightforward. A company called physics surplus sells the same module (at significant markup), the software they supply works with mine.
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