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New Glass Types
 

S-NPH1W

S-NPH1W is an optical glass that the transmittance has been greatly improved by optimizing the production process of S-NPH1. Since any other properties are the same as S-NPH1 except transmittance, the conventional handling method can be maintained in the polishing process and the others. We are pleased to introduce S-NPH1W optical glass with these unique properties to provide design flexibility for the lens thickness and the usage number of lens.


  S-NPH1W
Eco Optical Glass
Refractive Index nd 1.80809
Abbe Number νd 22.76
CTE α
(10-7/°C)
-30~70°C 83
+100~300°C 104
Transformation Point Tg(°C) 552
Yield Point At(°C) 589
Coloring λ80 420
λ5 375
Chemical ResistanceRW(P) 1
RA(P) 1
W(S) 1~2
SR 1.0
PR 1.0
Specific Gravity 3.29
Knoop Hardness Hk 460[5]
Abrasion Aa 291
Detail Catalog DATA PDF
Available shapes •pressing
•saw cut center-less
groundcylindrical blanks
•cut blanks

Please consult us about available size and tolerance.

 
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