Just say no to plexiglass!
Sorry to hear about the "carpet incident"... hopefully your bulb's not completely unusable now...
For a heat shield, you're gonna want to use real glass, and probably even tempered glass, but not plexi (or perspex or acrylic... maybe for the case, but it better be cooled well) -- don't want to throw any more plastic into the equation, right?
poohbear said:
Sorry to hear about the "carpet incident"... hopefully your bulb's not completely unusable now...
For a heat shield, you're gonna want to use real glass, and probably even tempered glass, but not plexi (or perspex or acrylic... maybe for the case, but it better be cooled well) -- don't want to throw any more plastic into the equation, right?
haha good idea. Im really not sure what i will use the bulb for, im pretty sure it will ruin my projector. I might use the ballast to retrofit a different commerical projector bulb though... damn i might just sell it on on ebay.
On the road to a useable setup!
Now that the reflector has been cut to fit around the bulb (my friend's pneumatic grinder and carbide bit made short work of it even though it was over a mm thick), I've continued on to more advanced prototyping.
The sockets and reflector are mounted to a temporary base and the makeshift "chassis" is a cardboard box with an opening cut for the LCD panel. The triplet is mounted on a freestanding cardboard panel, so the only light spoilage comes through the LCD and the edges of the fresnel. Next testing step will probably be nesting another box over the first one with the lens poking out the front.
Screen is just a white bedsheet for now and the photos were taken at night with no additional ambient light.
Now that the reflector has been cut to fit around the bulb (my friend's pneumatic grinder and carbide bit made short work of it even though it was over a mm thick), I've continued on to more advanced prototyping.
The sockets and reflector are mounted to a temporary base and the makeshift "chassis" is a cardboard box with an opening cut for the LCD panel. The triplet is mounted on a freestanding cardboard panel, so the only light spoilage comes through the LCD and the edges of the fresnel. Next testing step will probably be nesting another box over the first one with the lens poking out the front.
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An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Screen is just a white bedsheet for now and the photos were taken at night with no additional ambient light.
i would like to see some results with your setup, especially with this reflektor yof yours. i have a simmillar one but it was not helping at all. it produced hotspots wildly over the screen. the light it was reflecting was not usable at all...
I'm very happy with the results so far, but mind you that these photos were taken in a completely dark room at night with only the projector and some light bleeding from the test chassis (not completely enclosed). Visibility during the day is quite another matter -- tends to be very washed out. But maybe as the projector components become completely enclosed and I fabricate a better screen, that'll improve as well.
A friend of mine is trying to help out by finding a better reflector. He thought he might have one from an old photographic bulb flash unit. It'd be a larger diameter and possibly a more efficient design.
The quality of your fresnel plays a huge role with your projected light, so maybe you can test another one?
A friend of mine is trying to help out by finding a better reflector. He thought he might have one from an old photographic bulb flash unit. It'd be a larger diameter and possibly a more efficient design.
The quality of your fresnel plays a huge role with your projected light, so maybe you can test another one?
wow! yes i think it's possible to burn your ccd chip, since these lights are not only strong but have the same UV amount as the sun. use them with security glass...
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