S-NBH59 is an optical glass for polishing lens and effective for secondary chromatic aberration correction.
12.27.2021
S-NBH59 is an optical glass for polishing lenses that has a higher refractive index than the S-NBH51 and has a smaller partial dispersion ratio of θg and F.
These features are effective in reducing the thickness of optical lenses and correcting secondary chromatic aberration.
This glass material that can be used in a wide range of applications, such as interchangeable and projector lenses. We propose S-NBH59, which is effective for improving the performance of your products.
Features
1. Comparing with S-NBH51, θg, F is lower side: θg, F = 0.5792
2. The refractive index is higher than S-NBH51: nd = 1.76634
S-NBH59
(New Product) |
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Eco Optical Glass | Environmentally safe | |
Refractive Index nd | 1.76634 | |
Abbe Number νd | 35.82 | |
Δn/ΔT relative D line 40~60℃ (10-6 K-1) |
3.9 | |
Partial dispersion ratio θg,F | 0.5792 | |
Abnormal dispersibility ⊿θg.F | -0.0043 | |
CTE α
(10-7 K-1) |
-30~70℃ | 82 |
+100~300℃ | 103 | |
Transformation Point Tg Tg(℃) | 526 | |
Yield Point At At(℃) | 572 | |
Coloring | λ80 | 395 |
λ5 | 325 | |
Chemical Resistance | RW(P) | 1 |
RA(P) | 1 | |
W(S) | 3 | |
SR | 1.0 | |
PR | 1.0 | |
Specific Gravity | 3.47 | |
Knoop Hardness Hk | 610〔6〕 | |
Abrasion Aa | 135 | |
Detail Catalog DATA |
(Please consult us about product form of supply, available shapes, sizes and tolerances.)