K-PFK90 by Sumita
Standard
Very 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) | 1.4588 |
|---|---|
| Abbe Number (Vd) | 90.0 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{2.10946 - 0.00480268\,\lambda^2 + 0.00676454\,\lambda^{-2} + 8.333 \times 10^{-5}\,\lambda^{-4} + 3.41961 \times 10^{-7}\,\lambda^{-6} - 8.49339 \times 10^{-8}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 13.7 |
|---|---|
| TCE 100/300°C (10-6/K) | 16.5 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-2.23 \times 10^{-5} + 2(-2.13 \times 10^{-9})\,\Delta T + 3(9.79 \times 10^{-11})\,\Delta T^2 + \frac{2.57 \times 10^{-7} + 2(-1.68 \times 10^{-10})\,\Delta T}{\lambda - 0.221}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.72 |
|---|---|
| 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 | |
|---|---|---|---|---|
| FCD10A | Hoya | 1.4586 | 90.19 | |
| FCD10 | Hoya | 1.4565 | 90.27 | |
| H-FK71 | CDGM | 1.4565 | 90.273821 | |
| S-FPL52 | Ohara | 1.455999 | 90.288026 | |
| FPL52 | Ohara | 1.455999 | 90.31888 | |
| H-FK71A | CDGM | 1.456498 | 90.470884 | |
| N-FK58 | Schott | 1.456 | 90.9 | |
| LIYF4-E | Generic Birefringent | 1.476472 | 88.935059 | |
| FK54 | Schott | 1.437 | 90.702365 | |
| SRF2 | Generic IR | 1.437925 | 91.593259 |
Similar Glasses (Sumita)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| K-PFK90(M) | Sumita | 1.45733 | 89.8 | |
| K-CaFK95 | Sumita | 1.43425 | 95.0 | |
| CAFK95 | Sumita | 1.43425 | 95.0 | |
| K-PFK85 | Sumita | 1.48563 | 85.2 | |
| PFK85 | Sumita | 1.48563 | 85.2 | |
| K-PFK85(M) | Sumita | 1.48375 | 85.0 | |
| K-CaFK95(M) | Sumita | 1.43312 | 95.0 | |
| K-FIR97UV | Sumita | 1.4258 | 97.4 | |
| K-FIR98UV | Sumita | 1.42537 | 97.8 | |
| K-PFK80 | Sumita | 1.497 | 81.5 |