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Question: What light sources might I use to calibrate my spectrometer if I don’t have a CFL available?

mimiss is asking a question about spectrometer: Follow this topic

by mimiss | May 05, 2020 13:14 | #23548


I'm interested in working with the LEGO spectrometer but I don't have a CFL at this time. Short of ordering one, what are some other ways that I could get started?

This figure from an unrelated paper has some details on the emission spectra of different light sources: https://www.researchgate.net/figure/Emission-spectra-of-different-light-sources-a-incandescent-tungsten-light-bulb-b_fig1_312320039



3 Comments

Could you use a laser pointer and still go through the same workflow with @cfastie's reference image? I'm not sure if the peaks would line up, they would presumably need to be the same wavelengths. But it seems like in theory you should be able to match anything that gives you a discrete peak at a known wavelength.

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Thank you for this idea! I have laser pointers in a few colors in my house that I can try out.

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kgradow1 wrote:


Could you use a laser pointer and still go through the same workflow with @cfastie's reference image? I'm not sure if the peaks would line up, they would presumably need to be the same wavelengths. But it seems like in theory you should be able to match anything that gives you a discrete peak at a known wavelength.


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I think I used a red laser and a green laser to get the calibration to work at some point...

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