X-Ray Phase-Contrast Imaging with Three 2D Gratings

Figure 4

Distributions of phase gradients.The phase object is specified in (24) with 𝑆_𝑥=5 and 𝑆_𝑦=5. (a): the true 𝑥-gradient; (c): the measured 𝑥-gradient by phase stepping measurement. (b) and (d) are for the 𝑦-gradient. The spatial unit is 𝜇m.

(a)

(b)

(c)

(d)