by lobaz » Tue Apr 19, 2022 2:03 pm
Tekosh wrote: ↑Mon Apr 18, 2022 1:57 pm
I want over 98% transparency. I get 92% right now.
How do you measure transparency, Tekosh? If it is just power after the photopolymer / power in front of, I doubt you can get over about 92% due to Fresnel reflections -- you lose about 4% at both air-photopolymer boundaries. I don't think you can get 98% without antireflective coatings.
[quote=Tekosh post_id=72693 time=1650308275 user_id=6139]
I want over 98% transparency. I get 92% right now.
[/quote]
How do you measure transparency, Tekosh? If it is just power after the photopolymer / power in front of, I doubt you can get over about 92% due to Fresnel reflections -- you lose about 4% at both air-photopolymer boundaries. I don't think you can get 98% without antireflective coatings.