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New Glass Types


S-LAH89 is a tantalum-free optical glass recommended for polished lens blank applications. Located in the same extensively used area as S-LAH58 with potential for increased demand, S-LAH89 provides significant cost reduction and also features low specific gravity. We are pleased to introduce S-LAH89 optical glass with these unique properties to provide advantages in technical design and decreased production costs.

Eco Optical Glass
Refractive Index nd 1.85150
Abbe Number νd 40.78
-30~70°C 68
+100~300°C 80
Transformation Point Tg(°C) 669
Yield Point At(°C) 702
Coloringλ70 380
λ5 340
Chemical ResistanceRW(P) 1
RA(P) 3
W(S) 2
SR 4.0
PR 1.0
Specific Gravity 4.70
Knoop Hardness Hk 660 [7]
Abrasion Aa 70
Detail Catalog DATA PDF
Available shapes •pressing
•saw cut center-less ground
cylindrical blanks
•cut blanks
Please consult us about available size and tolerance.

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