More lumens and Point Light source

makey2 · 27th April 2006, 07:13 PM

How about using a large arc light then combining it with one of these to get a smaller arc. Would make the box a bit longer but has the advantage of a smaller point light source, you could also black out all the area around it to prevent excess heat transfer to the LCD.

Could it also be used with a pre-condenser lens....

Any thoughts?

info
Another link
Another link
Link
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On this link check out these. How about putting a few together with this at the end

List of companies making these

Also how about this as a reflector system?
EDIT: More sources Link 1, Link 2, Link 3, Link 4, Link 5., Link 6, Link 7

Cool video of this reflector working, if we added one of those fiber optic tapers at the top, could gather alot of light!

spamh8r · 28th April 2006, 08:35 PM

I've often wondered the same thing about the two parabolic mirrors. Problem with the commercial units you linked to is that they are plastic instead of steel, where heat would be a major issue. Also, the size of these would not accomodate something as large as a single ended bulb, but may help further concentrate a double ended one.

makey2 · 29th April 2006, 01:45 PM

U can get the same type of parabolic mirrors in steel
I put up a few links here. Yeah, I thought the double ended 250w metal halide might work nicely...
I deffo think it's worth a bit of experimenting with (no time myself until the summer hols)

dj_holmes · 29th April 2006, 06:32 PM

hmm, good. lets see progress!

spamh8r · 30th April 2006, 06:28 PM

Interesting... the 12" diameter one from Edmunds has a 3" focal length. I wonder how 'deep' the dish is. Seems that perhaps two of those with a fiber optic collector of fairly large size, along with a condensor lens would do quite well-- assuming that I could space the focal length with two opposing reflectors. You would obviously have some light loss from the holes where the double ended bulb leaves the reflector, but I think it would be acceptable. I will see if I can source something locally to experiment with.

27th April 2006, 07:13 PM	#1
makey2 diyAudio Member Join Date: Jul 2005 Location: Aberdeen	More lumens and Point Light source How about using a large arc light then combining it with one of these to get a smaller arc. Would make the box a bit longer but has the advantage of a smaller point light source, you could also black out all the area around it to prevent excess heat transfer to the LCD. Could it also be used with a pre-condenser lens.... Any thoughts? info Another link Another link Link More More On this link check out these. How about putting a few together with this at the end List of companies making these Also how about this as a reflector system? EDIT: More sources Link 1, Link 2, Link 3, Link 4, Link 5., Link 6, Link 7 Cool video of this reflector working, if we added one of those fiber optic tapers at the top, could gather alot of light!

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28th April 2006, 08:35 PM	#2
spamh8r diyAudio Member Join Date: Feb 2005 Location: Louisville, Ky	I've often wondered the same thing about the two parabolic mirrors. Problem with the commercial units you linked to is that they are plastic instead of steel, where heat would be a major issue. Also, the size of these would not accomodate something as large as a single ended bulb, but may help further concentrate a double ended one.

29th April 2006, 01:45 PM	#3
makey2 diyAudio Member Join Date: Jul 2005 Location: Aberdeen	U can get the same type of parabolic mirrors in steel I put up a few links here. Yeah, I thought the double ended 250w metal halide might work nicely... I deffo think it's worth a bit of experimenting with (no time myself until the summer hols)

29th April 2006, 06:32 PM	#4
dj_holmes diyAudio Member Join Date: Nov 2004 Location: london	hmm, good. lets see progress!

30th April 2006, 06:28 PM	#5
spamh8r diyAudio Member Join Date: Feb 2005 Location: Louisville, Ky	Interesting... the 12" diameter one from Edmunds has a 3" focal length. I wonder how 'deep' the dish is. Seems that perhaps two of those with a fiber optic collector of fairly large size, along with a condensor lens would do quite well-- assuming that I could space the focal length with two opposing reflectors. You would obviously have some light loss from the holes where the double ended bulb leaves the reflector, but I think it would be acceptable. I will see if I can source something locally to experiment with.

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