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valy

13 Feb 2022 23:10



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Am gasit asta: 
"There are articles explaining it. The deformation for 0.4 radius in 3pt cell is GREATER than than for 0.7 radius. BUT the "focussable defomation" is better for 0.4 radius. Essentially at 0.4 radius the edge of the mirror sags a little, but in a way that is corrected by focussing. It essentially changes the focal length. The deformation at 0.7 radius is not correctable at the focusser, it is irregular in nature."
https://www.cloudynights.com/topic/329521-plop-3-point-cell-question/?p=4237699
Se vede si in simularea PLOP, e o banda pe margine cu o deformare ciudata: