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Step 1: Woods glass

Picture of Woods glass
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This glass is a  UV band pass filter.
You can usually find this on a bulbs for Disco/Party purpose. All teeth under this light are white  :)
Cheapest way to get this glass is a bulb. So, get the bulb, remove metal and wires....
Break a small tube and let air inside...  
 
marcel.louw.7711 months ago

Interesting! Have you made any underwater uv films? I would really like to see how it looks like. I am busy with a similar project I just use 400w uv led :) busy sorting dichroic filters. What would you suggest I should use to see underwater minerals glow. UV A or UV B?