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New Glass Types
 

S-LAL19

S-LAL19 is an expensive raw materials free optical glass recommended for polished lens blank applications. Located in the same region as S-LAL18 used in various applications, S-LAL19 provides cost reduction and also features low specific gravity. We are pleased to introduce S-LAL19 optical glass with these unique properties to provide advantages in decreased production costs and technical design.



  S-LAL19 S-LAL18
Eco Optical Glass
Refractive Index nd 1.72916 1.72916
Abbe Number νd 54.09 54.68
CTE α
(10-7/°C)
-30~70°C 54 59
+100~300°C 69 69
Transformation Point Tg(°C) 644 685
Yield Point At(°C) 672 699
Coloring λ80 355 365
λ5 - 280
Chemical ResistanceRW(P) 1 1
RA(P) 5 4
W(S) 3 1
SR 52.0 51.2
PR 2.0 2.0
Specific Gravity 3.98 4.18
Knoop Hardness Hk 720 [7] 720 [7]
Abrasion Aa 61 70
Detail Catalog DATA PDF PDF
Available shapes •pressing
•saw cut center-less ground
cylindrical blanks
•cut blanks
•pressing
•saw cut center-less ground
cylindrical blanks
•cut blanks
Please consult us about available size and tolerance.

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