Two different radius are in everyone surface. Two surface are both so that.
Single lens with both surfaces are complex surface.Or two surfaces of the lens with composite concentric annular …
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:BK7
Size:10mm-200mm
Fringes:λ/2,λ/4
Center Thickness Tolerance:15mm~25mm
Dispersion Round :0.03mm—0.2mm
Centration:3 arc min
Surface Quality:60—40scratch and dig,80—50scratch and dig
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