P-SF69 by Schott
Preferred
Unknown
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) | 1.7225 |
|---|---|
| Abbe Number (Vd) | 29.23 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.365 — 2.5 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.62595\,\lambda^2}{\lambda^2 - 0.0121697} + \frac{0.235928\,\lambda^2}{\lambda^2 - 0.060071} + \frac{1.67435\,\lambda^2}{\lambda^2 - 145.652}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.99 |
|---|---|
| TCE 100/300°C (10-6/K) | 11.13 |
| Thermal Conductivity (W/mK) | 1.12 |
| Heat Capacity (J/gK) | 0.82 |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-2.55 \times 10^{-6} + 2(5.68 \times 10^{-9})\,\Delta T + 3(-2.85 \times 10^{-11})\,\Delta T^2 + \frac{9.5 \times 10^{-7} + 2(1.54 \times 10^{-9})\,\Delta T}{\lambda - 0.275}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 2.934 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | 95.88 |
|---|---|
| Poisson's Ratio | 0.25 |
| Knoop Hardness (kgf/mm²) | 612.0 |
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
suitable for precision molding
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| CD120 | Sumita | 1.7225 | 29.2 | |
| K-CD120 | Sumita | 1.7225 | 29.2 | |
| S-TIH18 | Ohara | 1.721507 | 29.23233 | |
| FD18 | Hoya | 1.721507 | 29.243436 | |
| PBH18 | Ohara | 1.721506 | 29.243262 | |
| SF18 | Sumita | 1.72151 | 29.3 | |
| FD20 | Hoya | 1.720225 | 29.300359 | |
| SFN1 | Sumita | 1.72022 | 29.3 | |
| D17-29 | Corning | 1.717409 | 29.492751 | |
| H-ZF3 | CDGM | 1.71736 | 29.49911 |