K-PFK80(M) by Sumita
Standard
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) | 1.49533 |
|---|---|
| Abbe Number (Vd) | 80.8 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{2.2128 - 0.0056313\,\lambda^2 + 0.00831368\,\lambda^{-2} + 0.000157901\,\lambda^{-4} - 1.28845 \times 10^{-5}\,\lambda^{-6} + 8.47865 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 13.4 |
|---|---|
| TCE 100/300°C (10-6/K) | 15.4 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.91 \times 10^{-5} + 2(-2.54 \times 10^{-9})\,\Delta T + 3(-5.06 \times 10^{-11})\,\Delta T^2 + \frac{3.29 \times 10^{-7} + 2(5.19 \times 10^{-11})\,\Delta T}{\lambda - 0.188}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.6 |
|---|---|
| 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 | |
|---|---|---|---|---|
| S-FPL51Y | Ohara | 1.497003 | 81.138165 | |
| MC-FCD1-M20 | Hoya | 1.4969 | 81.51 | |
| MP-FCD1-M20 | Hoya | 1.4969 | 81.51 | |
| D-FK61-25 | CDGM | 1.49653 | 81.531772 | |
| D-FK61A-25 | CDGM | 1.49665 | 81.549116 | |
| S-FPL51 | Ohara | 1.496999 | 81.545888 | |
| M-FCD1 | Hoya | 1.4971 | 81.56 | |
| FCD1B | Hoya | 1.4971 | 81.56 | |
| D-FK61A | CDGM | 1.497 | 81.605419 | |
| H-FK61B | CDGM | 1.497 | 81.605419 |
Similar Glasses (Sumita)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| K-PFK80 | Sumita | 1.497 | 81.5 | |
| PFK80 | Sumita | 1.497 | 81.5 | |
| K-PFK85(M) | Sumita | 1.48375 | 85.0 | |
| K-PFK85 | Sumita | 1.48563 | 85.2 | |
| PFK85 | Sumita | 1.48563 | 85.2 | |
| K-PFK90(M) | Sumita | 1.45733 | 89.8 | |
| K-PG325 | Sumita | 1.5067 | 70.5 | |
| K-PFK90 | Sumita | 1.4588 | 90.0 | |
| FK5 | Sumita | 1.48749 | 70.4 | |
| K-FK5 | Sumita | 1.48749 | 70.4 |