Question: Measuring UV-C Sources

jkenny23 is asking a question about spectrometry: Follow this topic

by jkenny23 | May 14, 2020 11:04 | #23629


Hello, I would like to measure a few claimed UV-C LED products I'm purchasing with a DIY spectromter. I don't think the direct approach will work, photographing through the diffraction grating, since the camera's glass lenses and sensor covering will block UV-C wavelengths. Would it be possible to project the diffracted light onto a surface like paper which could fluoresce and give an indication of the wavelength of the light source? Or any other ideas?



4 Comments

Hi Kenny, It is also possible to measure the light intensity with LEDs: For example, is possible to measure the intensity of ordinary UV LEDs (~ UVA) with blue LEDs. I'm not sure, but may be possible to measure the intensity of UVC LEDs using UVA LEDs. More info at: https://tinyurl.com/y7ny7ybe and https://tinyurl.com/y7ny7ybe Markos

Interesting, I wasn't aware LEDs as photodiodes were wavelength selective, but was aware of the general effect. Looks like your 2nd link was a copy of the first one, could you try again?

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Sorry, The second link is: https://tinyurl.com/ybcyu7ob This project is still in progress ...


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I found this resource regarding short/long wave UV fluorescence. Looks like beeswax is a common material that fluoresces with both long and short wave UV: https://aiccm.org.au/national-news/summary-ultra-violet-fluorescent-materials-relevant-conservation

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