where Vp is the projected potential for the whole sample:

V(x, y) is an average over the sample in the 2 direction. The transmission function at the exit of the sample at 2 = q0 is then y) = expOVp(x, y))

Here absorption has been neglected. This can be considered by introducing an imaginary absorption potential, — iß(x, y) (cf. Hamid Rahman [26] and Urban et al. [27]). Without absorption and for thin-phase objects the phase grating approximation is given by

0 0

Post a comment