KRS5 by Generic IR

Standard Unknown Environmentally Friendly

KRS5 by Generic IR is a standard optical glass. It transmits from 0.60 to 39.00 µm. It has very high thermal expansion (CTE of 58.0×10⁻⁶/K).

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.6–39.0 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.6–39.0 µm
Abbe Number Calculator
Transmission vs Wavelength

No transmission data available.

Transmission Calculator
Valid wavelength range: 0.600–39.000 µm
Optical Properties
Refractive Index (nd) —
Abbe Number (Vd) —
Dispersion Formula Sellmeier 5
Wavelength Range 0.6 — 39.0 µm
$$n(\lambda) = \sqrt{1 + \frac{1.8294\,\lambda^2}{\lambda^2 - 0.0225} + \frac{1.66756\,\lambda^2}{\lambda^2 - 0.0625} + \frac{1.12104\,\lambda^2}{\lambda^2 - 0.1225} + \frac{0.0451337\,\lambda^2}{\lambda^2 - 0.2025} + \frac{12.3802\,\lambda^2}{\lambda^2 - 27089.9}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 58.0
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-0.00024 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 7.372
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

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