H-ZLaF92 substrate

Polished ring substrate

Material : CDGM H-ZlaF92 Dense Lanthanum Flint, Rohs compliant with Nd 2.0033 & VD 28.44, equivalent to OHARA S-LAH79

Manufacturing process : double face polishing

Dimensions:  External diameter 68mm,  internal diameter 44mm

Tolerances: dimensions +/-0.25mm, parallelism <30 arcsecond

Shape : flat ring substrate

Aspect : S&D 60/40

Optical treatment : none

Usage : security application

Packaging : individual package, protected in optical paper

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