It is too the best of my knowledge that all lights (and any objects above 0 degrees Kalvin) put out infrared radiation, aka “far infrared' rays, that are closer to microwave rays than to visible light. Infrared as many of us may know is heat (like from the sun). So my thinking is that the metal halide bulbs we are using (and any other types) trow out tones of IR radiation that is making lcd panels hot. So my thinking is why not use cold mirrors that will filter out a good deal of IR radiation and reflect the visible light. From what I have read on edmund optics (cold mirror link) , these mirrors will do just that and reflect 90% of the visible light, and transfer 80% of the IR right on through. I'm thinking a 10% loss of light is a good trade off for a cooler lcd panel.
I also realize that a major contributer to heat on the lcd is the light absorbed by the polarizer. So I am wondering if much heat/if any on the lcd is due to IR radiation. If so, i think a cold mirror, in conjunction with a polarizing filter would be a great solution, much better than a fish tank. Any one have any incite? You can tell I still need to do some more research, but I would love to hear anyones opinions.
Sources
http://www.edmundoptics.com/IOD/DisplayProduct.cfm?Productid=1900
http://imagers.gsfc.nasa.gov/ems/infrared.html
http://www.ipac.caltech.edu/Outreach/Edu/infrared.html
I also realize that a major contributer to heat on the lcd is the light absorbed by the polarizer. So I am wondering if much heat/if any on the lcd is due to IR radiation. If so, i think a cold mirror, in conjunction with a polarizing filter would be a great solution, much better than a fish tank. Any one have any incite? You can tell I still need to do some more research, but I would love to hear anyones opinions.
Sources
http://www.edmundoptics.com/IOD/DisplayProduct.cfm?Productid=1900
http://imagers.gsfc.nasa.gov/ems/infrared.html
http://www.ipac.caltech.edu/Outreach/Edu/infrared.html
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When I talked to the guys at 3m about getting a sample of that
DBEF film that some these guys were trying, he mentioned that IR was probably the main cause of heat build up on the polarizer.
He said the DBEF does nothing to help with that and will break down from UV as well. He did tell me about a film that they are working on called "solar" or some thing like that. It suposedly reflects IR and UV while allowing most all of the rest of the spectrum to pass, at least this was the impression he gave me.
They were going to send me a sample but one never showed up and I didnt bother to follow up. You might want to e-mail them
and see if you can get a sample of that film. I am still useing a projection panel so I dont have much use for it right now.
DBEF film that some these guys were trying, he mentioned that IR was probably the main cause of heat build up on the polarizer.
He said the DBEF does nothing to help with that and will break down from UV as well. He did tell me about a film that they are working on called "solar" or some thing like that. It suposedly reflects IR and UV while allowing most all of the rest of the spectrum to pass, at least this was the impression he gave me.
They were going to send me a sample but one never showed up and I didnt bother to follow up. You might want to e-mail them
and see if you can get a sample of that film. I am still useing a projection panel so I dont have much use for it right now.
I do have a little care package of 3m films. None of them seem to do very much. I think they are more for lcd monitors.
The cold mirror idea has been talked about a lot in the giant threads.
I believe that low E glass will also transmit most of the light and block out most of the IR. Low E glass could be placed directly under the LCD, where as a mirror would mean that most people would have to design a completely new enclosure.
I believe that low E glass will also transmit most of the light and block out most of the IR. Low E glass could be placed directly under the LCD, where as a mirror would mean that most people would have to design a completely new enclosure.
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