howto:align_beam_backreflection
Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
howto:align_beam_backreflection [2022/08/29 10:58] – [Image on the beam diagnostics camera during focusing] peter | howto:align_beam_backreflection [2022/08/29 11:17] (current) – peter | ||
---|---|---|---|
Line 6: | Line 6: | ||
This is indeed normal, it is the result of using polarized light and interplay of various interference and diffraction effects. | This is indeed normal, it is the result of using polarized light and interplay of various interference and diffraction effects. | ||
- | Perfect alignment is reached when the lobes are more or less symmetric, that means they have roughly the same intensity in each quadrant. To reach this, you have to precisely position the beam to enter at the center of the objective entrance pupil, and the beam must be of course aligned with the optical axis of the objective. (Note that parallel beam displacement, | + | Perfect alignment is reached when the lobes are more or less symmetric, that means they have roughly the same intensity in each quadrant. To reach this, you have to precisely position the beam to enter at the center of the objective entrance pupil, and the beam must be of course aligned with the optical axis of the objective. (Note that parallel beam displacement, |
{{: | {{: | ||
- | The classic paper by E. Wolf " | + | Adding a drop of water on top of the coverslip reduces the back-scattering intensity |
- | These figures | + | |
- | Adding a drop of water on top of the coverslip reduces | + | Such images are used for daily and fundamental alignment |
- | Such images are used for the daily and fundamental alignment of the MicroTime 200. The detailed procedure is described in the user manual of MicroTime 200. Although the MicroTime is extremely robust we suggest to spend 5-10 minutes every day for verifying the quality of the alignment | + | The paper by [[ http:// |
+ | Similar figures can be found in this [[https:// |
howto/align_beam_backreflection.txt · Last modified: 2022/08/29 11:17 by peter