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CB Layer Coating

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1.499 SP CB Layer Coat SF Photochromic Single Vision (Grey/Brown) 70MM

Material: CR-39
Refractive Index (25℃): 1.501
UV Cut Off: 360
Abbe Value: 58
Specific Gravity (20℃): 1.32
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CB layer(composite bonding)layer coat is one of the most advanced photochromic lens manufacturing technologies in the world. 
The Fusion of the photochromic layer and the protective layer brings lens lighter weight, clearer version, faster changing speed and more uniform color in dark stage. In addition, UV protection and optional blue cut protection enable wearer to switch freely in multiple scenarios.

● All index 
● Fast change
● Uniform color
● Long-lasting
● UV protect
● Blue cut (Optional)
● Anti-Glare
● Super hydrophobic
 

Tooling Index=1.530

Diameter(mm) NominalCurve Truecurve RadiusofCurvature SAG40(mm) SAG50(mm) BackCurve C.T.(mm) E.T.(mm)
70mm 0.50 0.41 1292.68 0.15 0.24 5.09 9.2 15
70mm 2.00 2.04 259.80 0.77 1.20 5.63 8.6 13.3
70mm 4.00 4.24 125.00 1.61 2.53 5.63 8.0 10.0
70mm 5.00 5.56 95.32 2.12 3.33 5.63 8.0 8.0
70mm 6.00 6.35 83.46 2.43 3.83 7.10 10.0 11.0
70mm 8.00 8.62 61.48 3.34 5.31 7.08 10.0 7.5
75mm 0.50 0.06 8833.33 0.02 0.04 2.98 13.0 16.8
75mm 2.50 2.08 254.81 0.79 1.23 3.00 15.8 16.95
75mm 4.00 3.49 151.86 1.32 2.07 6.18 11.5 14.95
75mm 6.00 5.73 92.50 2.19 3.44 6.23 8.9 8.95
75mm 8.00 7.78 68.12 3.00 4.75 6.20 12.4 9.8

 

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