I will try it, will it work? The glass will be 14cm from the lamp, it's 2pieces of glass, both 3mm thick. I will put the uv-filter between it. Will it crack?

i used two 1/8" pieces sandwiching the UV filter and mine has not cracked (yet). people have said not to worry about it cracking, but rather worry about it shattering! i plan to replace it with lexan if i can ever find it locally...

why 2 peices? the more glass you add the more brightness you lose.

A global moderator said this to me:

"Every individual piece that you put in your light path will remove a percentage of light. But if you have 2 components that remove 10% of the light together they don't remove 20% of the light but rather 10% of the initial light and 10% of what remains. Understand?

In general, two 2 mm thick pieces of glass is worse than one 4 mm piece of glass. At least that is my understanding. It has something to do with internal reflections and refraction."

This is true as two pieces of glass will have 4 air-glass interfaces as opposed to only 2 for a single sheet of glass. The more refractive boundaries (ie. area where refractive indexes change... like air to glass, etc...) that are transmitted though with a beam of light, the more the losses due to reflection/refraction at the boundary.

gs

Hmmm . . . I thought that sounded familiar. That was me that told you that!

Moving to help - this don't belong in Extreme Mods.

Durachko