HitesFiero
Jan 22 2008, 05:55 PM
Full LCD aperture size Semi-parabolic Light cone; Fabbed and ready to test!
I’m just not satisfied with the + or - 50% loss in lumens when using a typical condenser lens/colaminator fresnel combo. So I just copied the basic light engine design that most of the small commercial 3 panel PJs use, a full reflective cone.
The reflective medium is mirror polished aluminum. I crunched a lot of #s to find the best angles, but there are a few compromises for the sake a fabrication ease. My test lamp is a Phillips probe start ed28 that we commonly refer to as the Home Depot bulb. It’s depth fore and aft in the cone will be fully adjustable.
So here are the pics....
HitesFiero
Jan 22 2008, 05:56 PM
HitesFiero
Jan 22 2008, 05:59 PM
I hope to start on the lamp mount and adjuster soon
samuraijack
Jan 22 2008, 06:38 PM
Not that Im saying it wont work...
But even if this does ABSOLUTELY nothing, I still applaud you for just trying it out.
The first letter in DIY is for "DO".
I see too many people lament about how they could do this or they could do that in theory...but I have always respected those curious enough to just plain make it and see what happens...
Love it!
Durachko
Jan 22 2008, 08:12 PM
Can't wait to see what you get out the front end of that critter.
samuraijack
Jan 22 2008, 08:21 PM
If nothing else, he can always take out the bulb and sing Ragtime songs from his balcony..
jeffek
Jan 22 2008, 08:25 PM
im curious because i have the same lamp .... will it work ??? cant wait to find out
ndnjoeh
Jan 23 2008, 02:49 AM
Will you be doing any comparisian testing, without a reflecter, and with a spherical reflecter? It sorta reminds me of Tgreenwoods work with the PSone. Is it the same size as the LCD and will you be trying it without a rear fresnel?
I tried a haligen floodlamp bulb, The rains here in California hit the floodlight when it was on and it broke cleanly around the wide end of the bulb looked like someone had cut it . So I cut the screw end off with and old bottle cutter and tried a G12 150w MH but it always left a black spot on the center of the screen. No matter what I tried I could not get the dark spot to disappear. ( ignor the spelling)
Luck to you
PhDeviant
Jan 23 2008, 04:41 AM
I see in your title that you are using the 14.1" wxga. Is this something you purchased recently? I ordered one a while back from geeks.com, but now I can't find them in stock anywhere.
It's an awesome monitor, I'd like to build another projector using this same LCD, if I could find it anywhere. Where did you get yours from?
arizonavideo
Jan 23 2008, 04:48 AM
That reflector will really hold in the heat. If that is a 400 watter I would add some big time AIR on it for testing.
Don't melt that panel.
HitesFiero
Jan 23 2008, 06:14 AM
QUOTE (ndnjoeh @ Jan 22 2008, 08:49 PM)
Will you be doing any comparisian testing, without a reflecter, and with a spherical reflecter? It sorta reminds me of Tgreenwoods work with the PSone. Is it the same size as the LCD and will you be trying it without a rear fresnel?
Well considering that the cone is the light engine, there’s no real easy way to compare reflector styles in the same chassis. It’s just slightly larger that the LCD, and will be mounted about 1.5 inches from it. Yes, there will be only one fresnel.
I tried a haligen floodlamp bulb, The rains here in California hit the floodlight when it was on and it broke cleanly around the wide end of the bulb looked like someone had cut it . So I cut the screw end off with and old bottle cutter and tried a G12 150w MH but it always left a black spot on the center of the screen. No matter what I tried I could not get the dark spot to disappear. ( ignor the spelling)
Luck to you
The arcs possition in the cone will be adjust able fore and aft to avoid just this sort of problem
QUOTE (PhDeviant @ Jan 22 2008, 10:41 PM)
I see in your title that you are using the 14.1" wxga. Is this something you purchased recently? I ordered one a while back from geeks.com, but now I can't find them in stock anywhere.
It's an awesome monitor, I'd like to build another projector using this same LCD, if I could find it anywhere. Where did you get yours from?
The 14.1 is a WUXGA+ (1440x900) panel used in laptops, I'm driving it with my Kontron controller board.
QUOTE (arizonavideo @ Jan 22 2008, 10:48 PM)
That reflector will really hold in the heat. If that is a 400 watter I would add some big time AIR on it for testing.
Don't melt that panel.
130 CFM drawn through the cone and over the bulb should cover it. The optics are behind a glass heat shield and have thier own cooling.
Martin A. G.
Jan 23 2008, 09:51 AM
Can't wat to see that reflector in action, and I agree with SJ trying things out in real life is the soul of DIY !
Cheers
HitesFiero
Jan 23 2008, 02:20 PM
QUOTE (Martin A. G. @ Jan 23 2008, 03:51 AM)
Can't wat to see that reflector in action, and I agree with SJ trying things out in real life is the soul of DIY !
Cheers
Yeah I'm really looking forward to testing it soon. But is still have to finish the gamma corrections on the Kontron firmware and finish the suspension rebuild on my current Fiero GT.........
HitesFiero
Jan 23 2008, 02:22 PM
QUOTE (samuraijack @ Jan 22 2008, 02:21 PM)
If nothing else, he can always take out the bulb and sing Ragtime songs from his balcony..
LOL!! I just now got that!......wow my whit is slow this week......
samuraijack
Jan 23 2008, 03:20 PM
Very few people would get that joke nowdays....
Durachko
Jan 23 2008, 03:47 PM
Sigh . . . let us all in on the nitty gritty of that joke please? I don't think I fully understand how the connection is made there although I have some ideas foremost of which has to do with a megaphone.
Edit: HF, your plog has quite an auspicious inception what with this kind of banter being tossed about already.
samuraijack
Jan 23 2008, 04:46 PM
Yep. In earlier Ragtime days, the performers used to use Megaphones to sing to the audience...what with the lack of microphones and all...
HitesFiero
Feb 6 2008, 03:34 AM
I’ve got the 550 fresnel cut to size and almost framed and the 14.1 is FULLY stripped. Working on the mounting rails…….trying to make time.
Durachko
Feb 6 2008, 02:09 PM
QUOTE (HitesFiero @ Feb 5 2008, 10:34 PM)
trying to make time.
You figure out how to do that then GET A PATENT!!!!!!!!!!!!!!!!!!!!!!!
BlindVision
Feb 6 2008, 09:39 PM
You are makeing TIME, and a serious light/Heat RE-De-flector.
-i cant wait to hear/see if OR how good it works.
Dee Iee WHY -because we can
HitesFiero
Mar 28 2008, 05:55 PM
HitesFiero
Mar 28 2008, 07:42 PM
I’m not going to disclose what I’ll be using for a final objective lens until I test it, so as not to run the risk of being branded a heretic!
Suffice to say that it may not be a conventional triplet or even a triplet at all…..
TheTrustedOne
Mar 28 2008, 07:57 PM
QUOTE (HitesFiero @ Mar 28 2008, 01:55 PM)
This is an awesome idea man, if it works like I think it will it will basically force all the light from the bulb through the first fresnel, and with the system completly sealed all the way to the second fresnel, the light engine should be as perfect as it can get
... good show man
The Trusted One
HitesFiero
Mar 28 2008, 08:57 PM
QUOTE (TheTrustedOne @ Mar 28 2008, 02:57 PM)
This is an awesome idea man, if it works like I think it will it will basically force all the light from the bulb through the first fresnel, and with the system completly sealed all the way to the second fresnel, the light engine should be as perfect as it can get
... good show man
The Trusted One
That's the basic idea, but if you look close you'll notice that I'm only using one fresnel. The first stage is an XL10 heat shield.
SIMUL8R
Mar 29 2008, 02:45 AM
QUOTE (HitesFiero @ Mar 28 2008, 01:57 PM)
That's the basic idea, but if you look close you'll notice that I'm only using one fresnel. The first stage is an XL10 heat shield.
I've thought about doing something similar to this way back but using 'white polished opal glass' I bought off of Surplus Shed instead of a Lexan. The Opal glass was frosted like the kinds used by doctors examining xray's with a backlight. It gave a great spread when testing a small but easy trial. I just never got around to building a full version of the idea.
I'm looking forward to see what becomes of this Fiero.
jeffek
Mar 29 2008, 02:53 AM
dude that thing is going to get hot hot hot
how do you plan to get the hot air out of that reflector
HitesFiero
Mar 29 2008, 02:56 AM
QUOTE (SIMUL8R @ Mar 28 2008, 09:45 PM)
I've thought about doing something similar to this way back but using 'white polished opal glass' I bought off of Surplus Shed instead of a Lexan. The Opal glass was frosted like the kinds used by doctors examining xray's with a backlight. It gave a great spread when testing a small but easy trial. I just never got around to building a full version of the idea.
I'm looking forward to see what becomes of this Fiero.
Same here Sim, but good math doesn't always guarantee good results.
But I'm pretty optimistic it will work as expected.
HitesFiero
Mar 29 2008, 03:02 AM
QUOTE (jeffek @ Mar 28 2008, 09:53 PM)
dude that thing is going to get hot hot hot
how do you plan to get the hot air out of that reflector
Very hot indeed, the bulb end of the cone isn’t finished yet, but there will be a small secondary reflector at the base of the bulb. Air will be pulled around the bulb and small base reflector and out the back. I’ll be pulling somewhere in the neighborhood of around 160-200 cfm through it.
HitesFiero
Apr 9 2008, 01:57 PM
I got the lamp mount built, and there is about 3/16 gap at the base of the bulb for air flow. I'm going to try it as is before I attemp to add a second small reflector ring at the bulb's base. I'm hopping to test fire the imaging and light engine this week
I'll try to get some pics of the lamp holder up today.
Martin A. G.
Apr 9 2008, 08:29 PM
oooh uuuh ooooh
I thought this project had run out of steam or something like that, cause I havent seen any progress in a while..
Nice to see your still at it HF
can't wait to see the test image fired up
HitesFiero
Apr 9 2008, 09:49 PM
QUOTE (Martin A. G. @ Apr 9 2008, 03:29 PM)
oooh uuuh ooooh
I thought this project had run out of steam or something like that, cause I havent seen any progress in a while..
Nice to see your still at it HF
can't wait to see the test image fired up
Thanks, work and family make for very little project time. I've got most of the time consuming parts done, so it should roll a little faster now.
HitesFiero
Apr 10 2008, 07:36 PM
HitesFiero
Apr 10 2008, 07:43 PM
I picked this up about a year ago, I'm planing on testing it in a piece of the objective focus system.
6.5" Omega Enlarger Asm; the unit contains 2 identicle 6.5 plano-convex heat treated lenses
Smokes added for scale
TheTrustedOne
Apr 10 2008, 08:20 PM
I am sorry if I missed something here, How are you cooling the cone?
HitesFiero
Apr 11 2008, 01:49 PM
QUOTE (TheTrustedOne @ Apr 10 2008, 03:20 PM)
I am sorry if I missed something here, How are you cooling the cone?
look at post 28
http://www.lumenlab.com/forums/index.php?s...st&p=278416
Subgenius
Apr 11 2008, 02:16 PM
Durachko
Apr 11 2008, 03:26 PM
jeffek
Apr 11 2008, 07:39 PM
lol
HitesFiero
Apr 14 2008, 03:52 PM
QUOTE (jeffek @ Apr 11 2008, 02:39 PM)
lol
WTF! That's no where near to scale!
Durachko
Apr 14 2008, 03:56 PM
QUOTE (HitesFiero @ Apr 14 2008, 11:52 AM)
WTF! That's no where near to scale!
Hmmmmmm . . . yeessssss, I agree . . . the reflector appears to have magnified the object.
HitesFiero
Apr 14 2008, 04:00 PM
QUOTE (Durachko @ Apr 14 2008, 10:56 AM)
Hmmmmmm . . . yeessssss, I agree . . . the reflector appears to have magnified the object.
Just as I relize that I left myseft wide open for that one, I see that D posts a reply! Priceless!
jeffek
Apr 14 2008, 06:13 PM
hahahah
my fat legs are wiggling back and forth at the speed of light
.... and i just pooped a little
SupraGuy
Apr 15 2008, 03:03 PM
Well, that HUGE objective lens changes a lot of the rules around your reflector, that's for sure. Sweet.
Oh yeah. Heretic.
Seriously though, I had my doubts about the potential efectiveness of your cone reflector, but now that I see the size of the objective lens, it makes a lot more sense. We'll have to see how it is for vignetting, but that's going to make for massive amounts of light. You may be able to get away with removing one of the fresnel lenses with that setup. Heck you might not need either of them.
HitesFiero
Apr 15 2008, 07:47 PM
QUOTE (SupraGuy @ Apr 15 2008, 10:03 AM)
Well, that HUGE objective lens changes a lot of the rules around your reflector, that's for sure. Sweet.
Oh yeah. Heretic.
Seriously though, I had my doubts about the potential efectiveness of your cone reflector, but now that I see the size of the objective lens, it makes a lot more sense. We'll have to see how it is for vignetting, but that's going to make for massive amounts of light. You may be able to get away with removing one of the fresnel lenses with that setup. Heck you might not need either of them.
That's the direction I'm going, but I won't be using the 6.6 lenses by themselves, the focal lengths are only around 5-6 inches.
Keeping the distances in the light path through all stages up to the final objective as short as possible is my goal.
HitesFiero
Apr 15 2008, 08:12 PM
I fired up the light engine for the first time last night; I’m still seeing rectangular spots…….
The directed light output was very impressive and fairly even, I had a fan blowing on the aluminum light cone and was able to lay my hand directly on it right above the bulb.
I suspected that the Lexan wouldn’t be able to handle the heat, and I was right;
it took about 12 minutes for it to become a concave-convex lens! No worries, I already have a perfect sized piece of tempered glass ready to take it’s place.
The next step is to slide the optic stages back in and start the focusing tests…..I might start tonight…..but then again, I still have to finish the suspension on passenger side rear of the GT, and spring is here….I miss my car………what to do……
teamwindsor
Apr 15 2008, 09:23 PM
The next step is to slide the optic stages back in and start the focusing tests…..I might start tonight…..but then again, I still have to finish the suspension on passenger side rear of the GT, and spring is here….I miss my car………what to do……
[/quote]
I vote projector.... i want to see what this beast it capable of!
arizonavideo
Apr 16 2008, 06:31 AM
Do you know the FL of the Omega Enlarger lens pack?
I have had a few of them and I have found the fl to be vary short.
I had three and all had a FL of 3" to 4".
It would be nice to see if the larger lens pack will focus sharp.
HitesFiero
Apr 16 2008, 03:58 PM
QUOTE (arizonavideo @ Apr 16 2008, 01:31 AM)
Do you know the FL of the Omega Enlarger lens pack?
I have had a few of them and I have found the fl to be vary short.
I had three and all had a FL of 3" to 4".
It would be nice to see if the larger lens pack will focus sharp.
I double checked the FL of the lenses themselves again, and they are the same as yours, around 3-4, so can imagine that the whole assembly is very short, which is good in my case since I plan on using it as a type of “post” final objective condenser of shorts. But I need to some testing before I can confirm anything.
HitesFiero
Apr 18 2008, 02:12 PM
I disassembled the slotted middle area to widen the track for the tempered glass. I also added some air intakes in front of the glass to increase airflow through the reflectors area. I’ll have it back up and testing soon. I’m considering using some of the “diffusing” sheets that came with the panel to help homogenize the light pattern as it hits the panel.
HitesFiero
Apr 28 2008, 04:46 PM
I’ve got the light and imaging stages reassembled with the new tempered glass. I haven’t had any time to test it yet.
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