Best method of cleaning dichros?

[hobbybob]

Rob told me about the D-test they did with First contact.
They had an optic that needed cleaning and gave it to a optician and asked, clean it with whatever you like. The optician cleaned it with his best cleaning agent.
After they dried it, it looked squeeky clean.
Then they drawed a D on it with first contact. Letting it dry and removed it.
It clearly showed a nice D on a surface that everybody thought was squeeky clean.

[masterpj]

Rob told me about the D-test they did with First contact.
They had an optic that needed cleaning and gave it to a optician and asked, clean it with whatever you like. The optician cleaned it with his best cleaning agent.
After they dried it, it looked squeeky clean.
Then they drawed a D on it with first contact. Letting it dry and removed it.
It clearly showed a nice D on a surface that everybody thought was squeeky clean.

So hobbybob you are saying that first contact doesn't clean well???

[badger1666]

So hobbybob you are saying that first contact doesn't clean well???

dude read it again its the other way around, first contact showed how dirty the suposedly clean optic was

[michelrietveld]

D as in DUH !!
...................
LOL

[drlava]

Rob told me about the D-test they did with First contact.
They had an optic that needed cleaning and gave it to a optician and asked, clean it with whatever you like. The optician cleaned it with his best cleaning agent.
After they dried it, it looked squeeky clean.
Then they drawed a D on it with first contact. Letting it dry and removed it.
It clearly showed a nice D on a surface that everybody thought was squeeky clean.

This stuff sounds great, but that anecdotal test is not proof to a skeptic that it performed better than the opticians original method. Alternate explanations could be D-shaped residue left behind or microscopic changes to the optic coating surface caused by the First Contact solvent. That said, an electron micrograph of the test surface boundary would reveal the improvements to the cleanliness of the optic.. also a laser beam shown through the optic would show slightly different scatter surrounding areas with different levels of cleanliness. After all, that's what we're after.. less scatter, not necessarily a changed appearance of the surface of our optics.

[hobbybob]

Yeah could be.... i liked the story and have seen with my own eyes how my window, which i glued with silicone glue (smells like vinegar) was dirty and had a slight haze of silicone over it. Rob and i put a bit of first contact on and upon removing there was a clean square where the first optics was.

Last LEM i have seen people gain literally 10's of mW due to dirty optics. One guy even lost 200mW (believe it or not!).

First optics worked, i have seen it and a bottle lasts forever.

I was very scared cleaning my scanners with it, but Rob taught me how to do it and now i can clean them as well. Good stuff. period.

[masterpj]

dude read it again its the other way around, first contact showed how dirty the suposedly clean optic was

Aaaah :P I already was thinking that I had it at the wrong end :P