Quick Information
- Place of Origin:Korea
Description
PROMIX Semi-Finished Progressive Short Corridor Uncoated Blank
Specifications and Availability
- Material : 1.56 Index Resin (nd=1.549, Abbe=38, Specific gravity=1.28)
- Lens Size : 75mm Diameter with optics centered
- Nominal Base Curve : 1.50, 3.50, 5.75, 7.75
- Add Power : +1.00 to +3.00 in 0.25D steps
- Tolerance of Center & EdgeThickness : ±0.3mm
- Tolerance of Diameter : ±0.5mm
Middle Index 1.56 75mm Progressive Short Corridor Blank Data Sheet
| Diameter | Nominal convex curve |
Power range |
Actual convex curve |
Far vision radious |
Sagitta depth Gauge |
Back Curve |
Center Thickness |
Edge Thickness |
Add Powers in |
| (mm) | (D) | (D) | (N=1.549) (D) |
curvature (mm) |
50 mm bell (mm) |
(N=1.53) (D) |
(mm) | (mm) | 0.25 Steps (D) |
| 75.00 | 1.50 | -2.00 to -9.50 |
1.21 | 455.60 | 0.69 | 6.25 | 8.90 | 14.80 | +1.00 to +3.00 |
| 75.00 | 3.50 | -1.75 to +1.00 |
3.35 | 163.80 | 1.92 | 6.25 | 9.60 | 13.00 | +1.00 to +3.00 |
| 75.00 | 5.75 | -1.25 to +3.75 |
5.78 | 95.00 | 3.35 | 6.25 | 9.80 | 9.70 | +1.00 to +3.00 |
| 75.00 | 7.75 | +4.00 to +6.25 |
7.94 | 69.16 | 4.68 | 6.25 | 13.50 | 9.90 | +1.00 to +3.00 |
Regarding the surfacing chart for 1.549 progressive lens, we calculated down to the third decimal place and therefore in case you use this data to the second decimal place, please round down.
Add Prism
| ADD | 1.00 | 1.25 | 1.50 | 1.75 | 2.00 | 2.25 | 2.50 | 2.75 | 3.00 |
| Prism | 0.66 | 0.83 | 1.00 | 1.17 | 1.33 | 1.50 | 1.67 | 1.83 | 2.00 |
Middle Index 1.56 Progressive Short Corridor Design Map
