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Can we focus by shooting the rapidly over a blade edge in one direction and looking at the traces on a scope? The slope should be max when we are in focus. Focus depth will depend on NA, which will be greater for the image than for the beam.
The text was updated successfully, but these errors were encountered:
Can we focus by shooting the rapidly over a blade edge in one direction and looking at the traces on a scope? The slope should be max when we are in focus. Focus depth will depend on NA, which will be greater for the image than for the beam.
The text was updated successfully, but these errors were encountered: