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New Glass Types


Though S-NBH58 has high refractive indices with high dispersion, the partial dispersion ratio θg,F is low. That's why S-NBH58 could be effective for correcting chromatic aberration by combining it with anomalous dispersion glasses having both low refractive indices and low dispersion. We are pleased to introduce S-NBH58 which could be effective for higher performance of customer's products and could be used for various applications such as the lenses of Interchangeable lens cameras, Projectors and so on.

Eco Optical Glass
Refractive Index nd 1.78880
Abbe Number νd 28.43
-30~70°C 74
+100~300°C 95
Transformation Point Tg(°C) 560
Yield Point At(°C) 600
Coloring λ80 410
λ5 345
Chemical ResistanceRW(P) 1
RA(P) 1
W(S) 2
SR 1.0
PR 1.0
Specific Gravity 3.33
Knoop Hardness Hk 590 [6]
Abrasion Aa 131
Detail Catalog DATA PDF
Available shapes •pressing
•saw cut center-less ground
cylindrical blanks
•cut blanks

Available shape are pressing, saw cut center-less ground cylindrical blanks, cut blanks.
Please consult us about available size and tolerance.

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