I'm a newby to this thread and forum - just got into home theater with a Panny AE2000 so it has really peaked my interest in anamorphic solutions. I mentioned on another thread that the professional anamorphic prism systems use two achromatic prisms. These are the $10k + anamorphic adapters. I believe a slab of flint and crown are cemented together to achieve this. Look through a single prism, very little color dispersion will be seen as opposed to a single prism. I'm familiar with cementing lenses and for flat surfaces, this is no biggie using optical cement. The problem is in the main design. The optical indices of both glass components must be well known and that determines the wedge angle of each. Of course, you're dealing with two different pieces of glass now, and that increases cost significantly. You also need to have the cemented assembly coated for best results. I don't want to discourage anyone - just give those ambitious enough some extra information to go on so I can get the materials in a few months when you figure all this out and post it
On another slightly different topic. Cylindrical lenses work well - I just tried a test setup using opthalmic test lenses (available as cylindrical lenses from Premiere Products in Seattle), and it works good for the design purpose. I used a negative 6.0 diopter and a positive 4.5 diopter cylindrical lens pair (ratio of focal lengths is close to 1.33). The only problems are that these are simple 1 inch aperture lenses and not achromatic so they couldn't be used for a typical projector beam, but scaled up and corrected for color would probably work well (I already checked - none of the lens companies out there, that I could find, have anything available although there are some Chinese optical companies willing to make anything - so their web as says - I didn't explore that).
This might give somebody something to think about.