S-LAL12Q - improved processability and chemical durability
S-LAL12Q is an optical glass with improved workability and durability, which can be an issue for glasses in the S-LAL family. With the same optical performance (refractive index and Abbe number) as S-LAL12, the new S-LAL12Q offers improved properties for lens fabrication processes. S-LAL12Q is ideal for use various applications, such as in-vehicle camera lenses, projectors, and interchangeable lenses for photography.
Advantages
Improved chemical durability (compared to S-LAL12)
Powder method Water Resistance [RW(p)]: Grade 1; Powder method Acid Resistance[RA(p)]: Grade 3
Lower specific gravity than S-LAL12 – 3.59
COMPARISON
S-LAL12Q (New product)
S-LAL12 (Conventional product)
Environmental measures category
○
○
Refractive index nd
1.67790
1.67790
Abbe number vd
55.35
55.34
Linear expansion coefficient α
(10 -7 /℃)
-30 ~ +70°C
49
72
+100 ~ +300°C
59
86
Transition point Tg (℃)
689
652
Yield point At (℃)
717
679
Coloring degree
λ 80
380
360
λ 5
310
285
Chemical durability
RW (P)
1
2
RA(P)
3
Five
W(S)
2
2
SR
51.0
53.0
PR
3.0
4.2
Specific Gravity
3.59
4.01
Knoop hardness Hk
700 (7)
560 (6)
Abrasion degree Aa
62
166
Catalog data details
Product supply form
・Pressed products ・Round bar cut product ・Cut/rounded products
・Pressed products ・Round bar cut product ・Cut/rounded products
