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New Glass Types
 

S-NBH58

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.


  S-NBH58
Eco Optical Glass
Refractive Index nd 1.78880
Abbe Number νd 28.43
CTE α
(10-7/°C)
-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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