S-FPM5 by Ohara
Standard
Medium
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) | 1.552 |
|---|---|
| Abbe Number (Vd) | 70.697068 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.365015 — 2.32542 µm |
$$n(\lambda) = \sqrt{1 + \frac{0.8399\,\lambda^2}{\lambda^2 - 0.00376448} + \frac{0.537721\,\lambda^2}{\lambda^2 - 0.0148023} + \frac{0.953248\,\lambda^2}{\lambda^2 - 145.676}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 10.9 |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.04 \times 10^{-5} + 2(2.5 \times 10^{-9})\,\Delta T + 3(5.33 \times 10^{-12})\,\Delta T^2 + \frac{4.12 \times 10^{-7} + 2(3.42 \times 10^{-10})\,\Delta T}{\lambda - 0.222}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.74 |
|---|---|
| Relative Cost | 2.8 |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 52 |
| Alkali Resistance | — |
| Phosphate Resistance | 4 |
Notes
NEW GLASS!! Recommended
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| M-FCD500 | Hoya | 1.55332 | 71.69 | |
| MC-FCD500-20 | Hoya | 1.55352 | 71.72 | |
| MP-FCD500-20 | Hoya | 1.55352 | 71.72 | |
| FCD500 | Hoya | 1.55397 | 71.76 | |
| QUARTZ | Generic Birefringent | 1.544296 | 70.132045 | |
| K-PSK500(M) | Sumita | 1.55 | 71.9 | |
| K-PSK500 | Sumita | 1.55215 | 72.0 | |
| B58-72 | Corning | 1.558086 | 71.998499 | |
| QUARTZ-E | Generic Birefringent | 1.553398 | 68.797763 | |
| K-GFK70(M) | Sumita | 1.56627 | 71.3 |
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| S-FPM3 | Ohara | 1.53775 | 74.703119 | |
| S-APL1 | Ohara | 1.517277 | 69.563209 | |
| APL1 | Ohara | 1.517277 | 69.563209 | |
| S-APL | Ohara | 1.517277 | 69.56319 | |
| S-FPM2 | Ohara | 1.59522 | 67.735723 | |
| S-FPM4 | Ohara | 1.52841 | 76.452824 | |
| BSL22 | Ohara | 1.518206 | 65.039654 | |
| BSL21 | Ohara | 1.503779 | 66.814545 | |
| BAL22 | Ohara | 1.568729 | 63.162358 | |
| S-BAL22 | Ohara | 1.568729 | 63.10486 |