Toroidal mirror
Two different radius are in a surface.A surface of the lens with composite concentric annular and many focus of complex surfaces, and another surface of the lens with spherical or aspheric surface.
Material:UV-grade fused silica BK7 and other optical lens
Centration:1 arc min
Length tolerance:±0.1mm
Surface quality:60—40scratch and dig
Focus tolerance:±1%
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