  We present a new holographic concept, named six-pack holography (6PH), in
which we compress six off-axis holograms into a single multiplexed off-axis
hologram without loss of magnification or resolution. The multiplexed hologram
contains straight off-axis fringes with six different orientations, and can be
generated optically or digitally. We show that since the six different complex
wavefronts do not overlap in the spatial frequency domain, they can be fully
reconstructed. 6PH allows more than 50% improvement in the spatial bandwidth
consumption when compared to the best multiplexing method proposed so far. We
expect the 6PH concept to be useful for a variety of applications, such as
field-of-view multiplexing, wavelength multiplexing, temporal multiplexing,
multiplexing for super-resolution imaging, and others.
