3D-Printed Anaperture Single-Shot Anaglyph Aperture

3D Gunner wrote:

Those are interference filters used for passive 3D (cinema) projection, such as those used by the Dolby 3D system, or those invented and produced by INFITEC®.

They're just crossed polarizers (and depend on a screen that preserves polarization).

Commercial sensors don't generally come with differently-oriented polarizers over pixels, so not useful for capture. It's also worth noting that you'd actually have a little issue in that the same object seen by differently polarized left/right views can look very different; you'd probably also need a half-wave plate (as used to make a circular polarizer) to essentially randomize the polarization before separating-out the linearly-polarized left/right views.

There are tricks one can play with LCLVs (Liquid Crystal Light Valves, as I discuss in Programmable Liquid Crystal Apertures and Filters for Photographic Lenses ). In theory, you could use LCLVs to independently electronically shutter a pair of left/right apertures such that you could get separate exposures for left/right by timing the aperture openings against the progression of a slightly-unusual rolling electronic shutter that does something like interlacing. I.e., open left, scan even lines, close left, open right, scan odd lines, close right. That might be do-able on some Canon EOS models using Magic Lantern, because apparently some Canon EOS models have had two independent channels for readout of alternating lines). Easier, just do a two-exposure burst with left aperture, then right aperture.

Anyway, generally not real helpful for capture.

BTW, the real way to do display would be lightfield displays using tech like what Misapplied Sciences Parallel Reality is doing, although they use the lightfields to have many viewers -- without glasses -- simultaneously see entirely different things on the same display (here's a geekwire about it ). (Disclaimer: my brother, Paul Dietz, was actually Chairman and CTO of Misapplied Sciences, although he is no longer involved in running it.)