S-NSL2 by Ohara

Obsolete Unknown Environmentally Friendly

S-NSL2 by Ohara is an obsolete optical glass. It transmits from 0.32 to 1.00 µm with an nd of 1.516016 and a Vd of 56.858179. It has medium thermal expansion (CTE of 8.8×10⁻⁶/K) and excellent chemical resistance.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.3–2.4 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.3–2.4 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.320–1.000 µm
Optical Properties
Refractive Index (nd) 1.516016
Abbe Number (Vd) 56.858179
Dispersion Formula Sellmeier
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{1 + \frac{0.951239\,\lambda^2}{\lambda^2 - 0.00513092} + \frac{0.313095\,\lambda^2}{\lambda^2 - 0.0231961} + \frac{1.70929\,\lambda^2}{\lambda^2 - 201.54}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.8
TCE 100/300°C (10-6/K) 10.8
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.47
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 1
Alkali Resistance —
Phosphate Resistance 1
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
H-K8 CDGM 1.51602 56.794825
C2 Hoya 1.51602 56.771193
K4 Schott 1.518952 57.399398
K5G20 Schott 1.52344 56.76
KDP Generic Birefringent 1.509182 56.224997
B270 Schott 1.52308 58.571369
H-K51 CDGM 1.52307 58.639792
C12 Hoya 1.523073 58.640203
K10 Schott 1.50137 56.41
C10 Hoya 1.50137 56.296772
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
NSL2 Ohara 1.516016 56.800755
S-FTL10 Ohara 1.501372 56.421009
FTL10 Ohara 1.501372 56.399833
S-NSL3 Ohara 1.518229 58.902057
NSL3 Ohara 1.518229 58.966406
NSL33 Ohara 1.514536 54.714595
NSL5 Ohara 1.522494 59.790926
S-NSL5 Ohara 1.522494 59.835417
NSL7 Ohara 1.511121 60.485793
BAL12 Ohara 1.539955 59.454008
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