I noticed a good amount of designs (especially the small ones) using a hot mirror in between the bulb and the LCD. If you use a hot mirror in addition to the pro-reflector (a cold mirror), do you still need cooling on the LCD panel?

I was thinking of encasing the lamp in a metal "duct" and using forced air to cool the metal. The only light that should get out to the LCD would have to pass the hot mirror, and just wondered if that would help the lcd not need cooling.

Thanks

It would help, yes, but I belive the LCD screen itself will generate a little heat. It might not need much cooling, just make sure the air is not standing completely still around it.
But I'm new in this field, and might very well be very wrong. Please correct me if I am.

I'm not entirely sure, but I think the hot mirrors only block IR heat, it's not going to stop heat from conducting through the glass. Also the metal tube will get very hot and the air around it will heat up, after a while the LCD will be heated too...

There is cold mirrors too. I have a 4"x5" one that blocks 80% of the heat. You can fold the lamp light path for a even smaller box.

I got it from edmund's

http://www.edmundoptics.com/onlinecatalog/...00&search=1

# NT43-962

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It's is new and for sale. Send me a PM