Fig. 1.

SFDS device and tissue phantom. Broadband optical illumination ($\lambda =450$ to 1000 nm) and sinusoidal spatial modulations with frequencies from 0 to $0.5{\mathrm{mm}}^{-1}$ using phase shifts of 0, $2\pi /3$, and $4\pi /3$ are projected onto a layered siloxane phantom. The resulting images are captured and the strength of the reflected AC modulation is determined.