guy,in,a,hat
So for my #dlp #cyanotype enlarger, I need to basically reduce the amount of absorbed #UV in the #optics. As an optical engineer, I know that #aluminum is pretty good for #UVA and #UVB. And look at how good a #mirror it has to be. It's literally a piece of #soda can! This #LED is 50w, it can make these old coupons go to Prussian white in just 2 seconds at the source. At around 2.5" for 30 to 50 seconds with and without the mirror it can turn the coupon white.
Aug 4, 2024 at 5:28pmTusky
Show threadguy,in,a,hatAug 4, 2024
Here are some images of the results.
Show threadguy,in,a,hatAug 4, 2024

This is great 👍😃. It's at least supporting the idea of using flexible aluminum mirrors held in #resin #sla #3dprinting parts.

So now I can design a #integrator tube in #blender, or a double cylindrical optical path. Then 3D print mirror holders with #flexure adjustments and then give it a try.

Show threadguy,in,a,hatAug 4, 2024
I was able to expose a piece of paper with the 50W UV lamp at 24" in 15 minutes without a lens and at 13minutes with a 60 degree lens. I'm using a 380nm centered LED. To me, it looks like it would be best to get a high power 100W 400nm than to go for a more lossy 265nm light. As is, this 50W would be inferior to the existing high voltage lamp. The clear advantage is that it doesn't get hot at all and I could just put in a timer for exposures.