K-VC89(M) by Sumita
Preferred
Very Common
Environmentally Friendly
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Optical Properties
| Refractive Index (nd) | 1.8059 |
|---|---|
| Abbe Number (Vd) | 40.9 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{3.17171 - 0.0137084\,\lambda^2 + 0.029629\,\lambda^{-2} + 0.00111501\,\lambda^{-4} - 5.55766 \times 10^{-5}\,\lambda^{-6} + 5.69411 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.4 |
|---|---|
| TCE 100/300°C (10-6/K) | 8.3 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[5.61 \times 10^{-6} + 2(1.72 \times 10^{-8})\,\Delta T + 3(-1.79 \times 10^{-10})\,\Delta T^2 + \frac{7.49 \times 10^{-7} + 2(7.58 \times 10^{-10})\,\Delta T}{\lambda - 0.227}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.75 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 3 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| P-LASF47 | Schott | 1.8061 | 40.9 | |
| S-LAH53 | Ohara | 1.806098 | 40.925996 | |
| S-LAH53V | Ohara | 1.806099 | 40.929791 | |
| L-LAH53 | Ohara | 1.806249 | 40.907302 | |
| H-ZLAF52 | CDGM | 1.806099 | 40.945389 | |
| LAH53 | Ohara | 1.806098 | 40.948508 | |
| H-ZLAF52A | CDGM | 1.8061 | 41.016887 | |
| M-NBFD13 | Hoya | 1.8061 | 40.740652 | |
| NBFD13 | Hoya | 1.8061 | 40.73 | |
| MC-NBFD130 | Hoya | 1.8061 | 40.73 |