If I am not wrong , the problem is to create a bright focusing screen.
At first at minolta than at Hasselblad , they used plastic screens which crafted with mixing polymer and transparent fibers. Transparent fibers created a internal surface for focusing.
Why you are not creating focusing screens from acrylic , polyester or clear epoxy ?
May be an idea but worth to study.
I will look to the patents and write again
Mustafa Umut Sarac
FWIW I concur, and yes I have personally used HF based reagents in both semicon & metal finishing environments. It was only just worth the trouble in a professional, "I was getting paid for it and had a full rubber suit etc etc and a safety drench shower and gluconate first aid kit and panic buton within reach" environment.
Originally Posted by Roger Hicks
Also FWIW it's weak acid not a strong, acid using those terms in the chemical jargon not colloquial sense. But that isn't important to the OP's practical application, HF is unusually hazardous.
Last edited by DaveOttawa; 09-23-2007 at 05:45 PM. Click to view previous post history.
Reason: weak/strong acid bit.