[kguttag]

Good catch on the "combined with custom catadioptric lenses." Which by definition means a combination of mirrors and refractive optics. But I still don't think they are pancake lenses, but something more akin to what Limbak, which was recently bought by Apple was famous for designing catadioptric optics. Before being bought by Apple, Limbak was best known for their catadioptric design used by Lynx.

[cma]

Is there a ray diagram the Lynx optics somewhere? I never fully understood how they work (reflection is off the sides of them?). With Apple showing the lens element shapes, is there room for reflecting off from the side?