howto:align_beam_backreflection
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| howto:align_beam_backreflection [2015/11/05 16:43] – sisamakis | howto:align_beam_backreflection [2015/11/06 10:19] – sisamakis | ||
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| This is indeed normal, it is the result of using polarised light. Perfect alignment is reached when the lobes are more or less symmetric, that means they have roughly the same intensity. 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, | This is indeed normal, it is the result of using polarised light. Perfect alignment is reached when the lobes are more or less symmetric, that means they have roughly the same intensity. 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, | ||
| - | {{:howto:backreflection_defocused.mp4|}} | + | {{:howto:backreflection_defocused1.mp4|}} |
| The classic paper by E. Wolf " | The classic paper by E. Wolf " | ||
howto/align_beam_backreflection.txt · Last modified: 2022/08/29 11:17 by peter