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本帖最后由 ma_sha1 于 2011-6-4 16:51 编辑
Introducing my Short-arc spotlight using P-VIP lamp from DLP projector.
The P VIP & UHP lamp technology has 10 times higher surface brightness than HID lamps,
therefor project lights 10 times longer than HID.
This light will beat the 400W HID in throw!
This light is called Moon Blaster. The Moon Blaster name
was inspired by this thread Maxa Beam vs. the Moon:
The photo was amazing: http://www.candlepowerforums.com/vb/...d.php?t=199795
The host:
I know I wanted to go with 9" reflector host. Not sure which one I want to go with, I got both. I compared the popular 15Millip CP Thor style host (A Camo Thor clone in the photo) Lightforce Blitz 240 before deciding to go with Blitz for 3 reasons:
1, It looks a lot smaller than the Thor 15 Mil type
2, The reflector looks like much better quality
3, It has Focus ability, at this level of CPs, a proper re-focus upon target distance change can easily gain a few million cps.
The Ballast:
Again, I am taking the Ballast from DLP Projector. Instead of short the lamp On signal, I wired a switch to it, so I can shut the lamp keep the fan running for the after-cool (the red yellow Wire). I also kept the small board above the ballast that supplies 12v to the Fans kept the two fans for collling the ballast.
I used the same switch as factory one mounted at where the VGA port used to be to make it look natural (The Switch on Top)
Testing with the Factory P-VIP lamp that came with the Projector: Everything works!
One more thing I should mention: MY ballast has two Lamp control Signal
that need to be tricked. Besides the one I wired a switch on (Jumper the out put legs of Opto coupler), there was another trigger that was originally wired to a factory momentary switch. That switch will only be pressed when the OEM lamp is installed. When lamp door is open, it wont fire up. A safely feature I suspect may be on quite a few DLP projector models. I cut the wires soldered them together (The white piece with two brawn two blue wires, the momentary switch has two set of wires, no idea why).
The lamp:
This is the same lamp as used in the Mega Blaster, 120W P-VIP P24 1.0mm short arc lamp,
So I am not go to repeat the specs here. However, for use with Blitz, I must take the bulb out of the built-in reflector.
The two Bulb I peeled: left Philips UHP 120W, Right Osram P-VIP 120W
I'll be using the P-VIP as it has a smaller arc cleaner arc chamber, possible less hours on it (Both lamps were used with unkown hours)
The Blitz Blitz 100W lamp holder is Bi-Pin, I needed to re-mount the P-VIP lamp with a ceramic holder. After extensive internet ebay search: Look what I found: A Ceramic Tube Socket that I think its going to work!
I got the 12 Pin style that has an diameter almost perfect fit for the Blitz,
took some pins out, kept a few to allow me to pull adjust while testing it.
Test fitting making sure the Arc location is where the factory bulb filament used to be, so I know its within factory focus range.
The lamp is potted to the center hole using Automotive Exhaust Potty with a home made aluminum spacer. Now, I need to let it cure overnight.
I bored out the Blitz metal socket so that I can sit the Ceramic socket in it,
This way, the lamp can sit 1/4" more forward & fall into the Reflector focus zone.
Extending the filament:
This is a challenge I had to over come, the exotic metal lead wire is too short as it was originally connected for tiny reflector side walls. I need to extend it. I don't think copper or alu. wires can withstand the 200F heat right next to the
arc, so I decided to sacrifize one of my 75W HID bulbs & the Ceramic wrapped lead wire:
I had to break the HID bulb but it's not under high pressure as the UHP/P VIP bulbs are, so it won't explode.
the finished lamp inside the Blitz reflector
Finally, it's all done & ready to do battle with the Maxa Beam:
Left is Moon Blaster & Right is Maxa Beam:
The Beam shot is taken at 10 meters (33 feet) & exposure is set at 1/1000 of sec super low exposure so that I can avoid over exposure & tell the spot intensity apart.
Left=Moon Blaster, Right= Maxa Beam (On burst, 75W mode)
The Moon Blaster spot is so much more intense than Maxa Beam, it's not even funny.
Zoom in to see the spot better: The Moon Blaster hot spot core is smaller than the Maxa Beam's with much higher intensity. It has some corona, I think due to the reflector quality is not as good as Maxa Beam reflector. High precision shiot-arc reflectors can collinmate all lights into the spot. The Blitz reflector, although much better than other spotlights, its still not a perfect 4th degree parabola & thus can not collinmate 100% of the lights into the spot, but it does a pretty good job considering the cost. Precison short arc reflectors in this size will cost $600 to $800 alone.
Beam Shots:
The Beautiful Fort Gorges:
Shoot out is from a pier about 0.9 Mile away (~1430 meters)
First Up: Maxa Beam
with 10x Optical Zoom
the Moon Blaster
Zoom in slightly
with 10x Optical Zoom
How about a Fun Shot: Moon Blaster hitting the Atlantic Ocean Surface
That's it folks |
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发表于 2011-6-4 16:43
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