  Light field reconstruction from images captured by focal plane sweeping, such
as light field moment imaging (LFMI) and light field reconstruction with back
projection (LFBP), can achieve high lateral resolution comparable to the modern
camera sensor. This is impossible for the conventional lens array based light
field capture systems. However, capturing a series of focal sweeping images
along the optical axis is time consuming and requires fine alignment, and
different focal plane based light field reconstruction techniques require
images with different characteristics. To solve this problem, we present an
efficient approach for fast light field acquisition with precise focal plane
sweeping capture by defocus modulation rather than axial movement. Because of
the controllable point spread function, we can capture images for light field
reconstruction with both LFMI and LFBP.
