🎈 Public Lab: UV measurements

exekutive asked on November 06, 2018 01:47
210 views | #17475

Would a webcam based spectrometer be able to measure UVA spectra? (in the region of 350-400nm) How deep into UV are webcams usually sensitive to?

I would like to test UV LEDs that I buy online, and verify that they emit the correct wavelength of light.

5 Comments

Hi! I think most webcams can't see much lower than 400nm, but if your sample flouresces in the visible range, you can read that...

There's been some tests to see if certain image sensors (rear-illuminated CMOS) can sense lower than that, but glass blocks most of it, so there might have to be non-glass (pinhole?) optics... and there is sometimes glass over the sensor. So it quickly becomes pretty complex!

https://publiclab.org/tag/uv?page=2

Jeff

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