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The HRTEM imager allows to load a wave-function and to calculate HRTEM images.
The imager does not require loading a crystal file since it uses the metric and geometry
stored in the wave-function file. The wave-function are calculater either using the
Bloch-wave or the multislice
methods. Using the Bloch-wave method the illunimation tilt or crystal tilt can be changed
in real-time.

Figure 1 HRTEM imager.

Figure 2 Contrast transfer Function and rotational average.

Figure 3 Wave-function (phase image).
Controls are placed in 12 panes and are used to include the:
- Camera MTF: camera Modulation Transfer Function in the image intensity (Fig. 4a).
- Aberrations: Aberrations up to order 8 in the image formation <(Fig. 4b).
- CLC selector: crystal tilt, not enabled for multislice wave-functions (Fig. 5a).
- Coherence: illumination spatial and temporal coherence (Fig. 5b).
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Figure 4a Camera MTF. |
Figure 4b Aberrations. |
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Figure 5a CLC (crystal tilt). |
Figure 5b Spatial and temporal coherence. |
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Figure 6a Dark Field (illumination tilt (12,36,0)). |
Figure 6b HRTEM image under DF conditions. |
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Figure 7a Bright Field (illumination tilt (0,0,0)). |
Figure 7b HRTEM image under BF conditions. |
In order to modify defocus (or any aberration coefficient to order 8) move the mouse in the control and change
the value either entering a new value or using the keyboard ↑ or ↓ arrows to increase or decrease
its control. keys combined with Alt, Shift or Meta keys to speed up the changes.
Note that the formula box displays the wave-Aberrations (see HRSTEM imager).

Figure 8 HRTEM imager can introduce the contrast damping effect of the
Modulation Transfer Function of the camera.
The camera MTF can be measured using menu item Camera MTF (menu Measuring).
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Figure 9a Camera CCD MTF at low magnification. |
Figure 9b Calculated HRTEM image taking into account the MTF of the camera
(Gatan MSC-1Kx1K, 24 μm) image contrast 0.93. |
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Figure 10a Camera CCD MTF at high magnification. |
Figure 10b Calculated HRTEM image taking into account the MTF of the camera
(Gatan MSC-1Kx1K, 24 μm) image contrast 2.4. |
When a camera id selected and the MTF displayed, the TEM magnification slider changes the magnification
(on the camera) and introduces the MTF contrast damping (Stobbs factor ?).

Figure 11 A list of camera MTF can be loaded and selected.

Figure 12 HRTEM imager displaying the image and wave-function duplicated
4 times in x and y directions.