I have three Infocus Lp 120 or something projectors. Their DLP boards are dead, and unrepairable. Is it possible to use the lenses for a DIY projector? The outside lens is 38 mm I think. The inner one is less by a third I would think, the DLP chip with the mirrors are about three inches from the innermost lens. When i HOLD iT UP TO My Viewsonic projector at about one foot with the lens in front of it, I can produce an image about three feet wide on a screen that the 3lcd can put up 100 inches. Is it possible to use these lenses?

Can I use a Commercial Projectors Parts

From the FAQ section.