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UV camera project build question

Started Sep 24, 2018 | Discussions thread
petrochemist Veteran Member • Posts: 3,619
Re: UV camera project build question

You will need to be careful selecting your UV pass filter, all the old film era ones allow NIR through as well (which wasn't seen by film) Digital sensors are sensitive to NIR so the NIR will often swamp the detector. Only a few very expensive filters like the Baader U2, or carefully selected stacks of multiple filters will work acceptably.

The filter stacks may well prove to be too thick for placing on the sensor -the option I'm considering for UV needs at least 3mm thickness of BG38 glass together with a U330. That's a 5mm total filter thickness probably significantly more than the existing hot mirror (usually ~1.5mm thick).

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