Comment by 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.