bilbo.niket@LOCUS.UCLA.EDU ("Niket K. Patwardhan") (10/24/85)
Sorry about using space-net, but this is the only way I know to get back to Dick Pierce. I saw your thing on lenses.... my question is "Is it possible to make a lens that has a different focal length in one direction than in the other?" For example, if parallel rays come at it from the left they get focussed 10cm away, and if they come from the right they get focussed 100 cm away. The reason I ask is that if this is possible, then the little projector R2D2 used to project Leia's 3-D image in Star Wars is feasible. I know by looking at lens catalogs that differences about the thickness of the lens exist, but is complicated by the fact that the apparent plane at which the focussing starts is not the same in each direction. Replies to lcc.niket@ucla-cs lcc.niket@locus.ucla.edu Use both to ensure delivery.