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%
Post by Yan Zhang Electronic Components & Supplies @2011-12-20 16:12:00