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Transfer function

The toolbar contains tool buttons to:

The controls of the Transfer Function are distributed on panes to:

The effect of wavefront Aberrations up to order 8 (order selected by the Preferences) can be introduced in these figures (Fig. 9). The range of the plots and images is also defined in the Preferences. A popup menu is attached to these figures (Fig. 10) and allows to change the color lookup table, to print or save the plot, to do rotation averaging, etc.

Figure1

Figure 1 2-D plot of the wavefront (phase jumps modulo 2π).

Figure2

Figure 2 CTF and its attenuation envelopes with the crystal reflections (powder lines) of Si in [001] orientation.

To increase (decrease) defocus move the mouse on the CTF plot or image (Fig. 3) and use Alt-Ctrl-Shift + (). The thickness of the amorphous thin film (random phase approximation) is also increased (decreased) using the mouse and Alt-Ctrl-Shift + ().

Figure3

Figure 3 CTF 2-D the circle are labelled using the popup menu attached to the drawing.

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Figure4

Figure 4 Amorphous thin film (carbon and random phase approximation).

The diffractogram pane shows either an image (Fig. 4) or diffractogram (5) of an amorphous thin film of Carbon, silicon, ...(simulated using the random phase approximation).

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Figure5

Figure 5 Diffractogram of amorphous thin film (carbon and random phase approximation).

Zemlin tilt tableaux can be generated with or without beam tilt, Aberrations, etc (Fig. 11) as well as a wobble effect (Fig 12. 12).

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Figure6

Figure 6 Optical Transfer Function.

Figure7

Figure 7 Probe shape (the plot is done with different resolution and only the probe around its center is shown).

Figure8

Figure 8 Plot of a ronchigram (Cc = 0 [mm], source size = 0 [pm], thermal magnetic noise = 0 [pm] and objective aperture = 250 [mrad]).

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Figure9a Figure9b Figure9c

Figure 9a W22
(C12, A1) 10 nm.

Figure 9b W31
(C21, 3B2) 200 nm.

Figure 9c W33
(C23. A2) 200 nm.

Figure10a Figure10b Figure10c

Figure 10a W42
(C32, 4S3) 50 μm.

Figure 10b W44
(C34, A3) 50 μm.

Figure 10c W51
(C41, 5B4) 200 μm.

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Zemlin tilt tableaux can be generated with or without beam tilt, Aberrations, etc (Fig. 11).

Figure11a Figure11b

Figure 11a Zemlin tilt tableau
W33
(C23, A2) 0 nm.

Figure 11b Zemlin tilt tableau
W33
(C23, A2) 500 nm.

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CTF without W33 (C23, A2) and with W33 (C23, A2) aberration (Fig. 12a, 12b).

Figure12a Figure12b

Figure 12a CTF
W33
(C23, A2) 0 nm.

Figure 12b CTF
W33
(C23, A2) 500 nm.