S-NBH58 is an optical glass for polished lenses which has low partial dispersion ratio θg,F in the region of S-NBH
05.18.2018
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/℃) |
-30～70℃ | 74 |
| +100～300℃ | 95 | |
| Transformation Point Tg(°C) | 560 | |
| Yield Point At(°C) | 600 | |
| Coloring | λ80 | 410 |
| λ5 | 345 | |
| Chemical Resistance | RW(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 | ||
| 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.