Aperture replacement: rotate the radial knob of the aperture rod of the objective lens
(rotate clockwise to go in and counter-clockwise to go out), to make the indicator line
corresponds to the corresponding position, and then adjust the axis of the newly
replaced final aperture according to the steps of adjusting the alignment of the final
aperture. (you can also see from the picture, the process of changing the aperture.)
Adjusting final aperture alignment needs to practice many times, the accumulation of
experience, especially in the process of high resolution image has a lot of help. If the
final aperture is not alignment, the image is hard to focus clear, and the astigmatism is
big, when observing high-expansion image, effects more apparent. After replacement
the final aperture. Must carry out astig matism adjustment, specific see 5.2.4.3
5.2.4.3
Stigmator
1. When the magnification is higher than 3000x, even if the focus is clear and the final
aperture is well aligned, the image is still not clear, and astigmatism adjustment is
needed.
2. Before astigmatism adjustment, it needs to be confirmed. Adjust the magnification
to 3000-5000x, select a characteristic point, after the focus is clear then adjust the
overfocus and underfocus with the focusing function. If the characteristic point is
found to be enlarged in a certain direction, it indicates that astigmatism adjustment is
needed.
Summary of Contents for A63.7080
Page 1: ...A63 7080 81 Scanning Electron Microscope SEM Instruction Manual ...
Page 17: ......
Page 20: ...Fig 3 7 The function button and state display of the scan control window ...
Page 26: ...4 Automatic sample stage 4 1Sample stage control interface ...
Page 35: ...Function The following table contains information on the components of the Settings tab ...
