- #1
sonhouse
- 5
- 0
Hi all. I have a very heavy 9" reflector but it is has spherical curve.
It was made for a semiconductor projection aligner which was being scrapped
and I saved the mirror from going into the trash bin. I saw an article in
one of the rags about making a frame on the back of the mirror where you
arrange a bolt to press in on the center of the mirror and it doesn't take
much bending to convert it to a parabolic curve. So I am going to try that
and see what happens. My question is this: sitting in a box for about 20 years now, it has collected a lot of dust, its really filthy. The curve is
spherical and probably as good as you can make such a mirror, I am guessing
1/20 wavelength. It was made to project an image accurate to micrometer dimensions on a silicon wafer. So what is the best way to clean it without
scratching it? I know I can blow off a lot of dust with just an air can but what about after that? Just run warm water with some detergent? I think it was aluminized, not sure of that, that is to say what the coating is. I don't think its gold, too bad about that! its been sitting around literally for 20 years. Maybe it needs recoating? How can I tell? Thanks for your help.
:yuck:
It was made for a semiconductor projection aligner which was being scrapped
and I saved the mirror from going into the trash bin. I saw an article in
one of the rags about making a frame on the back of the mirror where you
arrange a bolt to press in on the center of the mirror and it doesn't take
much bending to convert it to a parabolic curve. So I am going to try that
and see what happens. My question is this: sitting in a box for about 20 years now, it has collected a lot of dust, its really filthy. The curve is
spherical and probably as good as you can make such a mirror, I am guessing
1/20 wavelength. It was made to project an image accurate to micrometer dimensions on a silicon wafer. So what is the best way to clean it without
scratching it? I know I can blow off a lot of dust with just an air can but what about after that? Just run warm water with some detergent? I think it was aluminized, not sure of that, that is to say what the coating is. I don't think its gold, too bad about that! its been sitting around literally for 20 years. Maybe it needs recoating? How can I tell? Thanks for your help.
:yuck: