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Optical Plastic Lens SEMI-FINISHED LENS

1.60 Flat Top Bifocal Lens

Material : 1.60 Index Resin (Ne=1.597, Abbe=40, Specific gravity=1.30)
Add Power : +1.00 to +3.00 in 0.25D steps.
Segment Size : 28mm

CONVEX SURFACE CONCAVE
SURFACE
C.T
(mm)
E.T
(mm)
Dia
(mm)
Nominal
Curve
True
Curve
Sag
(sagitta:40mm)
Sag
(sagitta:50mm)
Radius Radius
1.597  
2.25 2.13   0.71 1.11 280.00 111.70 8.5 12.2 75
4.25 4.59   1.53 2.40 130.00 88.80 6.4 9.1
6.25 5.97   1.99 3.13 100.00 132.50 8.4 6.4
8.25 8.90   2.98 4.72 67.09 111.70 10.8 6.4 70
Center Thickness:0.5mm Edge Thickness:0.5mm Diameter Ranges:0.5mm