K-VC90(M) by Sumita
Standard
Rare
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) | 1.84859 |
|---|---|
| Abbe Number (Vd) | 38.9 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{3.31495 - 0.013619\,\lambda^2 + 0.0338427\,\lambda^{-2} + 0.00110887\,\lambda^{-4} - 2.81106 \times 10^{-5}\,\lambda^{-6} + 5.11202 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.7 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.4 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.39 \times 10^{-7} + 2(1.31 \times 10^{-8})\,\Delta T + 3(-1.78 \times 10^{-10})\,\Delta T^2 + \frac{7.82 \times 10^{-7} + 2(9.78 \times 10^{-10})\,\Delta T}{\lambda - 0.232}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.98 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 2 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| D-ZLAF85A-25 | CDGM | 1.8511 | 40.055609 | |
| MC-TAFD315 | Hoya | 1.85135 | 40.07 | |
| M-TAFD315 | Hoya | 1.85135 | 40.07 | |
| MP-TAFD305 | Hoya | 1.85135 | 40.1 | |
| MC-TAFD305 | Hoya | 1.85135 | 40.1 | |
| M-TAFD305 | Hoya | 1.85135 | 40.1 | |
| D-ZLAF85LN | CDGM | 1.84558 | 40.094322 | |
| D-ZLAF85LN-25 | CDGM | 1.84443 | 40.067973 | |
| D-ZLAF85A | CDGM | 1.85222 | 40.10819 | |
| L-LAH85V | Ohara | 1.854 | 40.378368 |