I've seen something on the net called heat absorbing glass and I was wondering can you cut it to how you want or does it have to be precut. Second this should of been first but will it work for DIY projection I think it was meant for photography or something. Can someone shed some light on this?
60%
Well heat absorbing glass at Edmund sic.. says it absorbs
around 60% of the IR and turns it into heat. Sounds good to me.
www.edmundoptics.com
Well heat absorbing glass at Edmund sic.. says it absorbs
around 60% of the IR and turns it into heat. Sounds good to me.
www.edmundoptics.com
Theres no turning IR into heat... IR IS HEAT.
Heat Absorbing glass absorbs heat and distributes it into the surround air. Forced air cooling is needed to remove the hot air from your enclosure.
While Hot Mirrors and IR Filters reflect IR (heat) back at the source. Again, forced air cooling is needed to remove heat from around the bulb.
- JCB
www.diybuildergroup.com
Heat Absorbing glass absorbs heat and distributes it into the surround air. Forced air cooling is needed to remove the hot air from your enclosure.
While Hot Mirrors and IR Filters reflect IR (heat) back at the source. Again, forced air cooling is needed to remove heat from around the bulb.
- JCB
www.diybuildergroup.com
W
willie
Some have said it's best to only exhuast heat from a bulb with one fan pulling air out. What's your opinion on this? Is it better to have two fans (one blowing cool air in, and one pulling the heat out) or just one fan pulling the heat out?
heat absorbing glass/ cooling
In most cases it is better to pull the hot air away from a bulb that is operating at 600*celcius, or higher, so you do not shock cool the outer glass causing the bulb to explode.
On the subject of ir filter glass, I understand that most of the smaller filters available from places like edmund optics work properly, but they do not come in the size that would be very effective in most diy projects. I am trying a hot mirror from a company in canada named rosco. I will be picking up on 7/28/04 and will be posting the results in my thread, spectreag lilliput project. My hot mirror is 7.5" by 6.5" and will operate effectivly blocking 80% of the ir pasing 94% of the visible as long as I can keep the internal light engine temp below 200* celcius. After running the bulb for nearly an hour without the hot mirror or fan, the temp was around 150* celcius. Sor far it looks promising, so look at my thread for follow up info. rosco's web address is listed in my posts somewhere if you are wanting to contact them.
In most cases it is better to pull the hot air away from a bulb that is operating at 600*celcius, or higher, so you do not shock cool the outer glass causing the bulb to explode.
On the subject of ir filter glass, I understand that most of the smaller filters available from places like edmund optics work properly, but they do not come in the size that would be very effective in most diy projects. I am trying a hot mirror from a company in canada named rosco. I will be picking up on 7/28/04 and will be posting the results in my thread, spectreag lilliput project. My hot mirror is 7.5" by 6.5" and will operate effectivly blocking 80% of the ir pasing 94% of the visible as long as I can keep the internal light engine temp below 200* celcius. After running the bulb for nearly an hour without the hot mirror or fan, the temp was around 150* celcius. Sor far it looks promising, so look at my thread for follow up info. rosco's web address is listed in my posts somewhere if you are wanting to contact them.
One fan or Two?
As a guy who spent quite a few years in the industrial heating business, I can tell you that as long as your box isn't leaky, one fan is all you need. Consider this: Assume that your box is tight, and that the opening for cooling air inlet is the same size or bigger than the fan outlet. How much air do you think will flow in that inlet relative to what comes out of the fan?
methinks you know the answer. 😎
As a guy who spent quite a few years in the industrial heating business, I can tell you that as long as your box isn't leaky, one fan is all you need. Consider this: Assume that your box is tight, and that the opening for cooling air inlet is the same size or bigger than the fan outlet. How much air do you think will flow in that inlet relative to what comes out of the fan?
methinks you know the answer. 😎
When did this turn into a fan disscusion lol. I was only going to use it protect the LCD from heat.
W
willie
Sorry, I guess that was mostly my fault. Although, most people also have a fan blowing over the lcd to keep it cool too.
- Status
- Not open for further replies.