hello ywh,
This is a nice reflector, is that the same one (cold mirror reflector) Giorgos18 is using? Did you do some tests with it yourself?
What do you meaw with I supply this reflector for testing? (price?)
Bye
This is a nice reflector, is that the same one (cold mirror reflector) Giorgos18 is using? Did you do some tests with it yourself?
What do you meaw with I supply this reflector for testing? (price?)
Bye
YES !they are same
40$ each include shipping, by post office
60$ each include shipping, by DHL/EMS
40$ each include shipping, by post office
60$ each include shipping, by DHL/EMS
that is the exact same reflector I got for testing. It's a great reflector, just need to focus the lamp inside it
interesting! But I assume that you have to use a UHP lamp? Unfortunately, I don't have one... What kind of lamp is in the reflector on the picture, YWH? Would it work with a MH lamp 250W ?
What about stripping the hqi and put it into the reflector, I saw it on a german forum.. it would be possible to block the uv with a filter..
I don't think that is a very good idea - check this thread
http://www.diyaudio.com/forums/showthread.php?s=&threadid=135324
The lamp will lose it's colour temperature and
The uhp lamps are not very expensive - I am testing with a 40 USD 1000 hr lamp. Not sure about which lamps can run on normal ballasts but they are not very expensive
http://www.diyaudio.com/forums/showthread.php?s=&threadid=135324
The lamp will lose it's colour temperature and
The uhp lamps are not very expensive - I am testing with a 40 USD 1000 hr lamp. Not sure about which lamps can run on normal ballasts but they are not very expensive
hmm I didn't know that.. Modding a commercial projector with a stripped hqi is rather frequent.. Look at
http://www.allinbox.com/Mod_infocus_X1/Mod_infocus_X1.htm
http://www.allinbox.com/Mod_ask_c105/Mod_ask_c105.htm
but maybe I am wrong.
How about the heat-issue, Giorgos? Did you get rid of it?
I bought a IR/UV filter too, couldn't work with the heat on the fresnels and the lcd, but have to wait till it's here.. 🙂
When I get some results, i'll post it!
Ciao!
http://www.allinbox.com/Mod_infocus_X1/Mod_infocus_X1.htm
http://www.allinbox.com/Mod_ask_c105/Mod_ask_c105.htm
but maybe I am wrong.
How about the heat-issue, Giorgos? Did you get rid of it?
I bought a IR/UV filter too, couldn't work with the heat on the fresnels and the lcd, but have to wait till it's here.. 🙂
When I get some results, i'll post it!
Ciao!
here some pics,
first of all, this is the setup(found on this forum, invented by "Matthias" (?))
with the parabolic halogen reflector the condensor with the short focal distance (from the slide projector) and the other condenser to widen or to narrow the light beam. I tried taking some pictures of the light spot, but it's allmost impossible to take a picture of it with my camera..
But it works! You obtain a very even light spot. Unfortunately, my MH lamp is too big for the 50mm diameter reflector.
I don't know the effect with an elliptical reflector, as you used, giorgos.
first of all, this is the setup(found on this forum, invented by "Matthias" (?))
with the parabolic halogen reflector the condensor with the short focal distance (from the slide projector) and the other condenser to widen or to narrow the light beam. I tried taking some pictures of the light spot, but it's allmost impossible to take a picture of it with my camera..
But it works! You obtain a very even light spot. Unfortunately, my MH lamp is too big for the 50mm diameter reflector.
I don't know the effect with an elliptical reflector, as you used, giorgos.
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Yes! exactly what DIY is all about! I'm sure that will produce an interesting result
I made a bid on an old slide projector to get lenses, quite cheap, only R250 (about 25 USD), have to wait on the winning bid though
Haven't tended to the heat issue yet, I've been a little busy, however I am reading the forums everyday and gathering all the information I can get. Will make a plan though, it can be resolved without a doubt
That picture with the halogen reflector and lenses looks like it could do the trick! The light I got using the UHP and halogen reflector is very intense and completely visible in daytime, (except it lasted only a few seconds), all I need is to spread it out. It could very well work with the ellispoidal reflector as well. I'm going to see if I can find a spare triplet and take the concave lenses from it and see if that can be used in any way
I'm looking forward to your news
Later!
I made a bid on an old slide projector to get lenses, quite cheap, only R250 (about 25 USD), have to wait on the winning bid though
Haven't tended to the heat issue yet, I've been a little busy, however I am reading the forums everyday and gathering all the information I can get. Will make a plan though, it can be resolved without a doubt
That picture with the halogen reflector and lenses looks like it could do the trick! The light I got using the UHP and halogen reflector is very intense and completely visible in daytime, (except it lasted only a few seconds), all I need is to spread it out. It could very well work with the ellispoidal reflector as well. I'm going to see if I can find a spare triplet and take the concave lenses from it and see if that can be used in any way
I'm looking forward to your news
Later!
Hello!
I couldn't wait with the cement reflector untill it was dry, so I made a very crappy test reflector just in alluminium foil, and omg the light is used very efficient! Adjusting the position of the "reflector" made a wide beam, so I could place a +/- 15" fresnel [with a rather short focal length] about 15mm (!!) from the reflector. And here it comes: the COMPLETE surface of the fresnel was 'filled' with light. "Wow!" I thought, now let's try a triplet behind this setup, and yeah, a very bright and sharp image on my wall of the complete fresnel!
If I find my cam, I'll post a picture!
ps, @giorgos: if you get a slideprojector, there is a good IR filter in it, (to protect your dias), so this could solve your heat issue too!
I couldn't wait with the cement reflector untill it was dry, so I made a very crappy test reflector just in alluminium foil, and omg the light is used very efficient! Adjusting the position of the "reflector" made a wide beam, so I could place a +/- 15" fresnel [with a rather short focal length] about 15mm (!!) from the reflector. And here it comes: the COMPLETE surface of the fresnel was 'filled' with light. "Wow!" I thought, now let's try a triplet behind this setup, and yeah, a very bright and sharp image on my wall of the complete fresnel!
If I find my cam, I'll post a picture!
ps, @giorgos: if you get a slideprojector, there is a good IR filter in it, (to protect your dias), so this could solve your heat issue too!
strange, there seems to be a hotspot on the picture, didn't see it with the 'naked eye', in fact it looks different in my room, but it gives an impression of what it is. I didn't cover the top of the light bulb, maybe this should 'remove' the hotspot.
Almost all the light, coming from the bulb/reflector, goes through the fresnel, the rest of the room is quite dark.
btw, this is just a 35W hqi-t... That's why the fresnel can handle the 'heat'. With a 250W, there would be a heat problem, but there has to be a solution
ciao!
Almost all the light, coming from the bulb/reflector, goes through the fresnel, the rest of the room is quite dark.
btw, this is just a 35W hqi-t... That's why the fresnel can handle the 'heat'. With a 250W, there would be a heat problem, but there has to be a solution
ciao!
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