K-VC89 by Sumita
Preferred
Very Common
Precision Molding
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) | 1.81 |
|---|---|
| Abbe Number (Vd) | 41.0 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{3.18604 - 0.0137568\,\lambda^2 + 0.029614\,\lambda^{-2} + 0.00123837\,\lambda^{-4} - 8.01342 \times 10^{-5}\,\lambda^{-6} + 7.23306 \times 10^{-6}\,\lambda^{-8}}$$
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 | |
|---|---|---|---|---|
| D-ZLAF52LA | CDGM | 1.81 | 40.992863 | |
| P-LASF51 | Schott | 1.81 | 40.93 | |
| D-ZLAF81 | CDGM | 1.8088 | 40.999441 | |
| D-ZLAF52LA-25 | CDGM | 1.80882 | 40.970313 | |
| MC-NBFD135 | Hoya | 1.80834 | 40.92 | |
| D-ZLAF81-25 | CDGM | 1.80757 | 40.97334 | |
| LASF3 | Schott | 1.808009 | 40.610164 | |
| L-LAH84 | Ohara | 1.80835 | 40.548503 | |
| L-LAH53 | Ohara | 1.806249 | 40.907302 | |
| H-ZLAF52A | CDGM | 1.8061 | 41.016887 |