S-NSL5 by Ohara

Special Unknown Environmentally Friendly

S-NSL5 by Ohara is a special optical glass. It transmits from 0.32 to 2.40 µm with an nd of 1.522494 and a Vd of 59.835417. It has medium thermal expansion (CTE of 8.2×10⁻⁶/K) and excellent chemical resistance.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.32–2.4 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.32–2.4 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.320–2.400 µm
Optical Properties
Refractive Index (nd) 1.522494
Abbe Number (Vd) 59.835417
Dispersion Formula Sellmeier
Wavelength Range 0.32 — 2.4 µm
$$n(\lambda) = \sqrt{1 + \frac{1.04575\,\lambda^2}{\lambda^2 - 0.00585232} + \frac{0.239613\,\lambda^2}{\lambda^2 - 0.0236859} + \frac{1.15907\,\lambda^2}{\lambda^2 - 131.329}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.2
TCE 100/300°C (10-6/K) 9.5
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.14 \times 10^{-6} + 2(1.21 \times 10^{-8})\,\Delta T + 3(-4.3 \times 10^{-11})\,\Delta T^2 + \frac{3.41 \times 10^{-7} + 2(5.9 \times 10^{-10})\,\Delta T}{\lambda - 0.272}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.49
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 1
Alkali Resistance —
Phosphate Resistance 1
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
K5 Sumita 1.52249 59.6
K5HT Schott 1.522453 59.530889
K50 Schott 1.522572 60.179756
K5 Schott 1.522489 59.482671
H-K50 CDGM 1.52249 59.480754
N-K5 Schott 1.52249 59.48
B23-59 Corning 1.522996 59.479482
C5 Hoya 1.522488 59.447258
UK50 Schott 1.522571 60.383109
C40 Hoya 1.523 60.4016
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
NSL5 Ohara 1.522494 59.790926
NSL3 Ohara 1.518229 58.966406
S-NSL3 Ohara 1.518229 58.902057
NSL7 Ohara 1.511121 60.485793
S-BAL12 Ohara 1.539956 59.462478
BAL12 Ohara 1.539955 59.454008
S-NSL2 Ohara 1.516016 56.858179
NSL2 Ohara 1.516016 56.800755
S-BSL7R Ohara 1.51633 63.881689
BSL1 Ohara 1.510091 63.635037
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