Products

High Crown 1.6-1.9

High power plus lenses made from normal crown glass have larger center thicknesses whereas high power minus lenses have larger edge thicknesses.

To overcome the problems which spectacle wearers may have because of this, a wide range of glass types with high refractive indices and relatively low densities is available. They are suitable for the manufacture of thin and attractive high power lenses which are, in addition, lighter than those lenses made from crown glass.

Specifications

Code Type Color Info
D0290 HC-Weiss 0290 clear Refractive index (n) = 1.6
D0786 BS 565 clear Refractive index (n) = 1.65
D0888 BaSF 64 clear Refractive index (n) = 1.7
D0386 1 BS 5675 clear Refractive index (n) = 1.75
D0785 laSF 1.8/35 clear Refractive index (n) = 1.8
D0185 BS 5680 clear Refractive index (n) = 1.8
D0082 laSF 1.9/30 clear Refractive index (n) = 1.9