Any diffusion materials for UV light sources?

[Doug A]

Any material that spreads light out and passes UV? Thinking of a light modifier to make flashlight beam less pinpoint.

 

Thanks,

Doug A

[Andrea B.]

I have a thin plastic diffuser on one of my UV-Led flashlights, but I don't know where you buy thin plastic diffusion material. The point is, the diffuser doesn't have to be anything fancy.

[Guest]

Interesting! I have a dome diffuser from Adorama and should try that on my setup. I also assumed that any plastic would cut transmission.

 

What about bouncing the light?

[Andrea B.]

It does cut transmission a bit, but not enough to worry about.

 

See also Dabateman's topic: https://www.ultravio...ve-uv-hotspots/

Lee diffuser, home-made diffuser, good topic.

[Guest]

Sorry, my feedback was around flash strobe. I should have paid closer attention to the question.

 

For the flashlight I ended up buying 3 torches. I mount one or two of them fixed on the flower. Then as the exposure is usually 1.5-1/4 second I have just enough time to wave the other one around in a small circle from a different angle. Two or three light sources is plenty enough to eliminate hard shadows.

 

Softening the light would be a different situation. Though, my suggestion is probably closer to light painting and shadow coverage than diffusion.

[dabateman]

Any material that spreads light out and passes UV? Thinking of a light modifier to make flashlight beam less pinpoint.

 

Thanks,

Doug A

 

Yes you can buy a sheet of thin PTFE and cut that for your flash. PTFE passes UV very well. And is more diffuse than the Lee 750 I was using for a while, Duram frost I think.

 

Alternatively, you can get a cheap sheet of clear PMMA and wrap plumbing tape around it. Plumbing tape is also made of PTFE.

For one of my Canon 199A flashes, I did that. I had a clear PMMA window and just wrapped it. It works well and doesn't cut the UV by much.

[dabateman]

Oh flashlight not flash.

This thread is the answer and you gues it wrap it in plumbing tape:

https://www.ultravioletphotography.com/content/index.php/topic/3510-paint-torch-reflector-black/page__view__findpost__p__30493

[Doug A]

Oh flashlight not flash.

This thread is the answer and you gues it wrap it in plumbing tape:

https://www.ultravioletphotography.com/content/index.php/topic/3510-paint-torch-reflector-black/page__view__findpost__p__30493

 

Interesting read. Not sure I want to paint the new flashlights. At least the tape mod is reversible. I was supposed to buy tape today to make a WB target. Totally forgot. On the list for tomorrow.

 

Thanks,

Doug A