Is it possible to make LCD PJ like this ? :

http://www.pcworld.com/news/article/0,aid,...19,pg,2,00.asp# ...

hope, that aspherical FS mirror can be made in DIY sphere, but there must be needed something more to do ...

... what ? ...

... that mirrors can also solve keystoning in any direction and in extreme angles ... in folded designs ...

well, car mirrors are aspherical...... junkyard projector? who knows... I would guess they'd have to be pretty specially designed, but thats just a guess...

Those must be some high quality mirrors or one heck of a bright light to produce a good image without suffering from the light loss of bouncing off a mirror.

Not really DLPs are very efficient not sure the exact numbers but something like 60% (as compared to 5-8% for LCD). No 10% losses for fresnels, or 20% for triplet etc.. Just 4 bounces off FS mirrors that are 95-98% efficent so total efficency is 0.6 x 0.95 x 0.95 x 0.95 x 0.95 = ~49% instead of 0.9 x 0.9 x 0.08 x 0.9 x 0.8 = ~4% for a LL design.