SK-1310 by Ohara

Standard Unknown Environmentally Dangerous

SK-1310 by Ohara is a standard optical glass. It transmits from 0.17 to 2.50 µm with an nd of 1.458663 and a Vd of 67.854535. It has very low thermal expansion (CTE of 0.55×10⁻⁶/K), excellent chemical resistance, and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.365015–2.32542 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.365015–2.32542 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.172–2.500 µm
Optical Properties
Refractive Index (nd) 1.458663
Abbe Number (Vd) 67.854535
Dispersion Formula Sellmeier
Wavelength Range 0.365015 — 2.32542 µm
$$n(\lambda) = \sqrt{1 + \frac{0.750111\,\lambda^2}{\lambda^2 - 0.00497286} + \frac{0.354569\,\lambda^2}{\lambda^2 - 0.0142109} + \frac{0.918389\,\lambda^2}{\lambda^2 - 100.469}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 0.55
TCE 100/300°C (10-6/K) —
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) 2.2
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 —
Notes

Anhydrous Synthetic Fused Silica

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
SUPRASIL Heraeus 1.458464 67.878205
LITHOSIL-Q Schott 1.45844 67.83
F_SILICA Generic IR 1.458464 67.821433
C79-80 Corning 1.458467 67.795012
HOQ Heraeus 1.458563 67.664757
INFRASIL Heraeus 1.458563 67.664757
HERASIL Heraeus 1.458563 67.664757
HOMOSIL Heraeus 1.458563 67.664757
KDP-E Generic Birefringent 1.468324 68.984949
H-QK1 CDGM 1.47047 66.876032
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
SK-1300 Ohara 1.458567 67.837244
FSL3 Ohara 1.464499 65.938855
FSL5 Ohara 1.48749 70.21026
S-FSL5 Ohara 1.48749 70.236252
S-FSL5Y Ohara 1.48749 70.354425
BSL3 Ohara 1.498308 65.026785
BSL21 Ohara 1.503779 66.814545
S-APL Ohara 1.517277 69.56319
APL1 Ohara 1.517277 69.563209
S-APL1 Ohara 1.517277 69.563209
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