Apertures and Camera Constants
The apertures on the H9000 are:
Objective:
|
Aperture number |
Max. d-spacing [A] |
Q=l/2d [mrad] |
|
1 |
5.94 |
1.657 |
|
2 |
2.18 |
4.512 |
|
3 |
1.25 |
7.902 |
|
4 |
0.92 |
10.701 |
Selected Area aperture diameters:
3.95 mm
1.67 mm
700 nm
300 nm:
Using condenser aperture 1, the beam convergence with fully condensed beam is
0.69 mrad
Camera Constants:
Available camera lengths and camera constants Ll
|
Camera length [m] |
Cam. const. [mmA] |
|
0.25 |
4.75 |
|
0.5 |
9.5 |
|
1.0 |
19 |
|
2.0 |
38 |
|
3.5 |
57 |
