S-FPL51Y by Ohara
Standard
Unknown
i-line
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) | 1.497003 |
|---|---|
| Abbe Number (Vd) | 81.138165 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.326106 — 2.32542 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.14031\,\lambda^2}{\lambda^2 - 0.00595467} + \frac{0.0771496\,\lambda^2}{\lambda^2 - 0.0223954} + \frac{1.43722\,\lambda^2}{\lambda^2 - 274.29}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 13.7 |
|---|---|
| TCE 100/300°C (10-6/K) | 16.1 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-2.1 \times 10^{-5} + 2(-3.8 \times 10^{-9})\,\Delta T + 3(-4.12 \times 10^{-11})\,\Delta T^2 + \frac{3.32 \times 10^{-7} + 2(2.85 \times 10^{-10})\,\Delta T}{\lambda - 0.191}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.66 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 2 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 51 |
| Alkali Resistance | — |
| Phosphate Resistance | 4 |
Notes
Improved XMT at 365
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| PFK80 | Sumita | 1.497 | 81.5 | |
| K-PFK80 | Sumita | 1.497 | 81.5 | |
| MP-FCD1-M20 | Hoya | 1.4969 | 81.51 | |
| MC-FCD1-M20 | Hoya | 1.4969 | 81.51 | |
| D-FK61-25 | CDGM | 1.49653 | 81.531772 | |
| K-PFK80(M) | Sumita | 1.49533 | 80.8 | |
| D-FK61A-25 | CDGM | 1.49665 | 81.549116 | |
| FCD1B | Hoya | 1.4971 | 81.56 | |
| M-FCD1 | Hoya | 1.4971 | 81.56 | |
| D-FK61A | CDGM | 1.497 | 81.605419 |
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| S-FPL51 | Ohara | 1.496999 | 81.545888 | |
| FPL51 | Ohara | 1.496999 | 81.61466 | |
| S-FPM4 | Ohara | 1.52841 | 76.452824 | |
| S-FPM3 | Ohara | 1.53775 | 74.703119 | |
| S-FPL52 | Ohara | 1.455999 | 90.288026 | |
| FPL52 | Ohara | 1.455999 | 90.31888 | |
| S-FSL5Y | Ohara | 1.48749 | 70.354425 | |
| S-FSL5 | Ohara | 1.48749 | 70.236252 | |
| FSL5 | Ohara | 1.48749 | 70.21026 | |
| APL1 | Ohara | 1.517277 | 69.563209 |