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New Glass Types


S-NBH56 has low dispersion ratio θ g,F and is effective for correction of chromatic aberration by combine with abnormal dispesion glasses in low dispersion and low index field.
Moreover, it has an excellent transmission in spite of low dispersion, low index glass and it is enabled to use several pieces for such as interchangeable lens.
We are pleased to introduce S-NBH56 which enables us to unrealized optical design.

Eco Optical Glass
Refractive Index nd 1.85478
Abbe Number νd 24.80
-30~70°C 77
+100~300°C 94
Transformation Point Tg(°C) 578
Yield Point At(°C) 612
Coloring λ70 395
λ5 360
Chemical ResistanceRW(P) 1
RA(P) 1
W(S) 3
SR 1.0
PR 1.0
Specific Gravity 3.49
Knoop Hardness Hk 560 [6]
Abrasion Aa 127
Detail Catalog DATA PDF

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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