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New Glass Types


L-LAL15, which is Low Tg optical glass of Lower Cost for glass molding applications in the region of L-LAL13 that is widely used conventionally. By removing the expensive raw materials, the cost reduction has been achieved. Since the softening temperature and the linear coefficient of thermal expansion are low comparing to L-LAL13, we can expect "increase of mold tooling life", "reduction of production lead time" and "reduction of fraction defective". We are pleased to introduce L-LAL15 optical glass with these unique properties to provide advantages in decreased production costs.

Eco Optical Glass
Refractive Index nd 1.69304
Abbe Number νd 52.93
-30~70°C 54
+100~300°C 72
Transformation Point Tg(°C) 525
Yield Point At(°C) 562
Coloring λ80 345
λ5 -
Chemical Resistance RW(P) 1
RA(P) 4
W(S) 3
SR 53.0
PR 4.0
Specific Gravity 3.66
Knoop Hardness Hk 650[7]
Abrasion Aa 79
Detail Catalog DATA PDF
Available shapes •pressing
•saw cut center-less
•polished ball
•cut blanks
•spherical polished preform
Please consult us about available size and tolerance.
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