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Smaller grits
Hello,
The smaller your grits the harder they will be to work with effectively, too dry, too wet, too muddy(old material), warmed the mirrors incorrectly etc. At 9micron your operating with a .009mm grit.
Grits generally smooth to 1/2 the grit size. Ie 12micron will give a 6micon smoothed surface.
For a diffraction spot you normally go 1.22x0.56xF/l. In the case of a F6, that would equal 4.1microns(1.22 x 0.56 x 6) and you would set that as your polish limit or close too. A very good reason why mirrors get harder as they get faster, not just spherical to paraboloidal curve to consider.
Steve
1.22 - don't remember why
.56 being the most sensitive light wave
Focal Length
Last edited by mura_gadi; 10-08-2021 at 06:03 PM.
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