FD225 by Hoya
Preferred
Very Common
Environmentally Dangerous
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) | 1.80809 |
|---|---|
| Abbe Number (Vd) | 22.76 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36501 — 1.5296 µm |
$$n(\lambda) = \sqrt{3.11899 - 0.0158208\,\lambda^2 + 0.044425\,\lambda^{-2} + 0.00358349\,\lambda^{-4} - 0.000239434\,\lambda^{-6} + 3.87565 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 9.6 |
|---|---|
| TCE 100/300°C (10-6/K) | 11.8 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.09 \times 10^{-5} + 2(4.1 \times 10^{-9})\,\Delta T + 3(-1.04 \times 10^{-11})\,\Delta T^2 + \frac{1.01 \times 10^{-6} + 2(1.33 \times 10^{-9})\,\Delta T}{\lambda - 0.307}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.32 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 1 |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
Recommended glass type
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| S-NPH1 | Ohara | 1.808095 | 22.760817 | |
| S-NPH1W | Ohara | 1.808095 | 22.760817 | |
| H-ZF71 | CDGM | 1.8081 | 22.698087 | |
| H-ZF71GT | CDGM | 1.8081 | 22.698087 | |
| SFLD20 | Sumita | 1.81786 | 23.7 | |
| K-CD180 | Sumita | 1.80645 | 24.4 | |
| SFLD60 | Sumita | 1.80645 | 24.4 | |
| K-SFLD66 | Sumita | 1.79925 | 24.6 | |
| SFLD66 | Sumita | 1.79925 | 24.6 | |
| K-CD180(M) | Sumita | 1.79912 | 24.7 |
Similar Glasses (Hoya)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| M-FDS910 | Hoya | 1.82115 | 24.06 | |
| MC-FDS910-50 | Hoya | 1.82165 | 24.04 | |
| MP-FDS910-50 | Hoya | 1.82165 | 24.04 | |
| FD60-W | Hoya | 1.80518 | 25.46 | |
| FD60 | Hoya | 1.80518 | 25.46 | |
| FD6 | Hoya | 1.805184 | 25.465194 | |
| FD11 | Hoya | 1.784715 | 25.704276 | |
| FD110 | Hoya | 1.78472 | 25.72 | |
| FDS3 | Hoya | 1.7847 | 26.057653 | |
| FDS30 | Hoya | 1.784701 | 26.102957 |