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New Glass Types


S-NPH3 is a glass material with even higher dispersion than S-NPH2, with which appropriate correction of chromatic aberration is possible.
Its refractive index (nd) exceeds 1.95. We also recommend it as an effective glass material for thinner optical systems.

Eco Optical Glass
Refractive Index nd 1.95906 1.92286
Abbe Number νd 17.47 18.90
-30~70°C 59 67
+100~300°C 65 83
Transformation Point Tg(°C) 671 650
Yield Point At(°C) 704 676
Coloring λ70 440 440
λ5 395 390
Chemical ResistanceRW(P) 1 1
RA(P) 1 1
W(S) 1 1
SR 1.0 1.0
PR 1.0 1.0
Specific Gravity 3.59 3.58
Knoop Hardness Hk 450[5] 450[5]
Abrasion Aa 194 224
Detail Catalog DATA PDF PDF
Available shapes •pressing
•saw cut center-less
groundcylindrical blanks
•cut blanks
•saw cut center-less
groundcylindrical blanks
•polished ball
•cut blanks

Please consult us about available size and tolerance.

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