Figure 2.5.2.3

Cowley, J. M.

doi:10.1107/97809553602060000558

International
Tables for
Crystallography
Volume B
Reciprocal space
Edited by U. Shmueli

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International Tables for Crystallography (2006). Vol. B. ch. 2.5, p. 283 | 1 | 2 |

Figure 2.5.2.3

J. M. Cowley^a ^‡

Figure 2.5.2.3

The functions $[\chi (U)]$ , the phase factor for the transfer function of a lens given by equation (2.5.2.33), and $[\sin \chi (U)]$ for the Scherzer optimum defocus condition, relevant for weak phase objects, for which the minimum value of $[\chi (U)]$ is $[-2\pi /3]$ .