This is kinda a continuation of a previous thread, but from a totally new angle. So the story is, I got this dead CRT Projector. Didn't know what was wrong with it at first, but it turns out to have all three CRT's dead.
So I ripped the lenses, heatsinks, fans, anything useful out.
I had read that a CRT lens will only project a curved surface properly, but it's hard to tell in my experiment.
Here is a CRT lens + sheet of glass w/ a cross drawn in marker + a 20 watt floresent lamp.
Pretty neat huh? So I think if I get an LCD small enough, this could work!
Any good tips?
So I ripped the lenses, heatsinks, fans, anything useful out.
I had read that a CRT lens will only project a curved surface properly, but it's hard to tell in my experiment.
Here is a CRT lens + sheet of glass w/ a cross drawn in marker + a 20 watt floresent lamp.
An externally hosted image should be here but it was not working when we last tested it.
Pretty neat huh? So I think if I get an LCD small enough, this could work!
Any good tips?
Yes it could definitely work - there have been a few people to build projectors that way. If you take a look at the results page on my website, I believe that I have a picture or two of a man named David who built his projector with one of these lenses. There are also other sites out there of people's small-panel projectors.
The only problem that I see is that you need a high resolution panel that is smaller than about 4" diagonal, which are not terribly common. If you don't mind lower resolution, then no problems just using a mini-TV LCD panel. Also, you will almost certainly need a lamp that is stronger than what you are using. I believe a fresnel lens will increase your brightness as well, though some people using the small panels aren't using fresnel lenses and still get a decent image.
The only problem that I see is that you need a high resolution panel that is smaller than about 4" diagonal, which are not terribly common. If you don't mind lower resolution, then no problems just using a mini-TV LCD panel. Also, you will almost certainly need a lamp that is stronger than what you are using. I believe a fresnel lens will increase your brightness as well, though some people using the small panels aren't using fresnel lenses and still get a decent image.
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