FT 28 x 70    FT 35 x 70    RD 22 x 70   
FT 28 x 75    FT 35 x 75    Blended 75   
Armorlite® Flat Top 28
(Standard Index 1.498, uncoated)
70mm Diameter Lens Blank-
Segment Displacement: 5.5mm in, 5.5mm down

Adds in 0.25 diopter steps from 0.75 to 4.00
Nominal Curve True Curve Radius (mm) SAG at 50 Nominal Concave Edge Thickness Center Thickness
0.50 0.52 1019.231 0.31 6.00 18.0 11.4
1.50 1.51 350.993 0.89 6.00 18.0 12.5
3.00 3.04 174.342 1.80 6.00 12.5 8.8
4.50 4.56 116.228 2.72 6.00 12.5 10.7
6.25 6.31 83.994 3.81 6.00 8.0 8.4
8.25 8.35 63.473 5.13 6.00 8.0 11.3
10.00 10.14 52.268 6.37 6.00 8.0 14.2

Armorlite® Flat Top 35
(Standard Index 1.498, uncoated)
70mm Diameter Lens Blank-
Segment Displacement: 5.5mm in, 5.5mm down

Adds in 0.25 diopter steps from 0.75 to 4.00
Nominal Curve True Curve Radius (mm) SAG at 50 Nominal Concave Edge Thickness Center Thickness
0.50 0.52 1019.231 0.31 6.00 18.0 11.4
1.50 1.51 350.993 0.89 6.00 18.0 12.5
3.00 3.04 174.342 1.80 6.00 12.5 8.8
4.50 4.56 116.228 2.72 6.00 12.5 10.7
6.25 6.31 83.994 3.81 6.00 8.0 8.4
8.25 8.35 63.473 5.13 6.00 8.0 11.3
10.00 10.14 52.268 6.37 6.00 8.0 14.2

Armorlite® Round 22
(Standard Index 1.498, uncoated)
70mm Diameter Lens Blank-
Segment Displacement: 6mm down

Adds in 0.25 diopter steps from 0.75 to 4.00
Nominal Curve True Curve Radius (mm) SAG at 50 Nominal Concave Edge Thickness Center Thickness
0.50 0.52 1019.231 0.31 6.00 18.0 11.4
1.50 1.51 350.993 0.89 6.00 18.0 12.5
3.00 3.04 174.342 1.80 6.00 12.5 8.8
4.50 4.56 116.228 2.72 6.00 12.5 10.7
6.25 6.31 83.994 3.81 6.00 8.0 8.4
8.25 8.35 63.473 5.13 6.00 8.0 11.3
10.00 10.14 52.268 6.37 6.00 8.0 14.2

Armorlite® Flat Top 28
(Standard Index 1.498, uncoated)
75mm Diameter Lens Blank-
Segment Displacement: 8mm in, 6mm down

Adds in 0.25 diopter steps from 0.75 to 3.00
Nominal Curve True Curve Radius (mm) SAG at 50 Nominal Concave Edge Thickness Center Thickness
4.50 4.56 116.228 2.72 6.00 11.0 8.9
6.25 6.31 83.994 3.81 6.00 7.0 7.5
8.25 8.35 63.473 5.13 6.00 7.0 10.9

Armorlite® Flat Top 35
(Standard Index 1.498, uncoated)
75mm Diameter Lens Blank-
Segment Displacement: 8mm in, 6mm down

Adds in 0.25 diopter steps from 0.75 to 4.00
Nominal Curve True Curve Radius (mm) SAG at 50 Nominal Concave Edge Thickness Center Thickness
4.50 4.56 116.228 2.72 6.00 11.0 8.9
6.25 6.31 83.994 3.81 6.00 7.0 7.5
8.25 8.35 63.473 5.13 6.00 7.0 10.9

Armorlite® Blended 25/32
(Standard Index 1.498, uncoated)
75mm Diameter Lens Blank-
Segment Displacement: 3mm down

Adds in 0.25 diopter steps from 1.00 to 3.00
Nominal Curve True Curve Radius (mm) SAG at 50 Nominal Concave Edge Thickness Center Thickness
4.50 4.56 116.228 2.72 6.00 11.0 8.8
6.25 6.31 83.994 3.81 6.00 7.0 7.5
8.25 8.35 63.473 5.13 6.00 7.0 10.9