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Optical Plastic Lens SEMI-FINISHED LENS

1.56 Blended Bifocal Lens

Material : 1.56 Index Resin (Ne=1.549, Abbe=38, Specific gravity=1.28)
Add Power : +1.00 tp +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
1.549  
4.25 4.15   1.50 2.36 132.17 132.50 8.9 11.7 75
6.25 6.12   2.22 3.49 89.68 88.80 12.1 9.5
Center Thickness : 0.5mm Edge Thickness : 0.5mm Diameter Ranges : 0.5mm