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Home  > Products and Service  > Optical products  > New Glass Types  > S-LAH60MQ
New Glass Types


S-LAH60MQ is an optical glass with high refractive indices which has the smallest dn/dT among current LAH glasses.
Cars are used in environments where the temperature change is large from below zero (cold district) to more than 50 °C (inside car in summer). The large differences of the temperature may cause refractive index fluctuations. Zoom lens could adjust the refractive index fluctuations. But fixed-focus lens is common in the field of Automotive cameras and it's impossible for us to adjust the refractive index fluctuations with fixed-focus lens.
Whereas many LAH glasses have large positive dn/dT, S-LAH60MQ has almost zero dn/dT. So S-LAH60MQ could decrease the effect of the refractive index fluctuations.
In addition, S-LAH60MQ can be used for not only Automotive camera lenses but also projectors, photographic interchangeable lenses and various applications.

1.The smallest dn/dT among current LAH glasses  
   dn/dT(Dline 40℃~60℃)    -0.1
2.Equivalent to S-LAH60 and S-LAH60V for nd and νd
   We can enjoy different dn/dT glass with the same refractive indices

(New Product)
(Current Product)
(Current Product)
Eco Optical Glass
Refractive Index nd 1.83400 1.83400 1.83400
Abbe Number νd 37.17 37.16 37.21
dn/dT relative
D Line 40~60°C
-0.1 7.9 9.2
-30~70°C 85 56 58
+100~300°C 98 71 73
Transformation Point Tg(°C) 655 612 603
Yield Point At(°C) 688 632 635
Coloring λ80 425 420 430
λ5 340 340 350
Chemical ResistanceRW(P) 1 1 1
RA(P) 3 3 3
W(S) 3 1 1
SR 51.2 4.2 51.2
PR 1.2 1.0 1.0
Specific Gravity 4.71 4.43 4.43
Knoop Hardness Hk 520[5] 670[7] 660[7]
Abrasion Aa 160 78 57
Detail Catalog DATA PDF PDF PDF
Available shapes •pressing
•saw cut center-less
groundcylindrical blanks
•cut blanks
•saw cut center-less
groundcylindrical blanks
•cut blanks
•saw cut center-less
groundcylindrical blanks
•cut blanks
Please consult us about available shapes,dimentions and tolerance.

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