SRF2 by Generic IR

Standard Unknown Environmentally Friendly

SRF2 by Generic IR is a standard optical glass. It transmits from 0.21 to 11.50 µm with an nd of 1.437925 and a Vd of 91.593259. It has very high thermal expansion (CTE of 18.1×10⁻⁶/K).

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.21–11.5 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.21–11.5 µm
Abbe Number Calculator
Transmission vs Wavelength

No transmission data available.

Transmission Calculator
Valid wavelength range: 0.210–11.500 µm
Optical Properties
Refractive Index (nd) 1.437925
Abbe Number (Vd) 91.593259
Dispersion Formula Sellmeier
Wavelength Range 0.21 — 11.5 µm
$$n(\lambda) = \sqrt{1 + \frac{0.678059\,\lambda^2}{\lambda^2 - 0.00316855} + \frac{0.371405\,\lambda^2}{\lambda^2 - 0.0116662} + \frac{3.84847\,\lambda^2}{\lambda^2 - 1200.56}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 18.1
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-4.8 \times 10^{-5} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.277
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Notes

source: Handbook of Optics Vol. II

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
FK54 Schott 1.437 90.702365
N-FK58 Schott 1.456 90.9
H-FK71A CDGM 1.456498 90.470884
FPL52 Ohara 1.455999 90.31888
S-FPL52 Ohara 1.455999 90.288026
H-FK71 CDGM 1.4565 90.273821
D-FK95-25 CDGM 1.43744 94.438841
FCD10 Hoya 1.4565 90.27
LIYF4 Generic Birefringent 1.453776 93.549426
H-FK95N CDGM 1.4378 94.523389
Similar Glasses (Generic IR)
Glass Manufacturer nd Vd Compare
CAF2 Generic IR 1.433849 94.995854
LIF Generic IR 1.392146 97.294682
BAF2 Generic IR 1.474478 81.607872
IRG9 Generic IR 1.486056 81.251965
MGF2 Generic IR 1.377744 106.217612
F_SILICA Generic IR 1.458464 67.821433
BEO Generic IR 1.718619 93.251706
IRG15 Generic IR 1.534275 55.700357
IRGN6 Generic IR 1.589096 56.33564
KCL Generic IR 1.490213 43.33857
Compare Glasses
    Compare Selected