  In this letter we report on the effects of pixel crosstalk on the
experimental realization of a reported encoding method (Opt. Lett. 39, 1740
(2014)) with PA-LCoS SLMs. We found that, under Nyquist limit condition, about
70% of a single pixel cell can generate unexpected phase modulation. In order
to approach uniform phase modulation, and consequently improve the quality of
measured amplitude and phase images, a generalized sampling scheme is proposed.
To corroborate our proposal, proper experiments were carried out. On this
point, a particular implementation of the well-established phase shifting
technique allows us to measure the retrieved complex field by using just a
single camera.
