LAF2 by Hoya
Standard
Rare
Environmentally Dangerous
LAF2 by Hoya is a standard optical glass with a rare melt frequency. It transmits from 0.32 to 1.55 µm with an nd of 1.744 and a Vd of 44.9. It has medium thermal expansion (CTE of 7.2×10⁻⁶/K), good chemical resistance, and dangerous environmental properties.
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) | 1.744 |
|---|---|
| Abbe Number (Vd) | 44.9 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36501 — 1.5296 µm |
$$n(\lambda) = \sqrt{2.96574 - 0.00965716\,\lambda^2 + 0.0260245\,\lambda^{-2} + 0.000366846\,\lambda^{-4} + 2.82056 \times 10^{-5}\,\lambda^{-6} - 1.37399 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.2 |
|---|---|
| TCE 100/300°C (10-6/K) | 8.7 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.21119 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 2 |
| Acid Resistance | 3 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
General glass Type
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| K-LaF2 | Sumita | 1.744 | 44.9 | |
| LAF2 | Sumita | 1.744 | 44.9 | |
| H-LAF3B | CDGM | 1.744 | 44.900027 | |
| N-LAF2 | Schott | 1.74397 | 44.85 | |
| D44-45 | Corning | 1.744001 | 44.818533 | |
| LAM2 | Ohara | 1.743997 | 44.787528 | |
| S-LAM2 | Ohara | 1.743997 | 44.786431 | |
| LAF2 | Schott | 1.744002 | 44.719972 | |
| K-VC174(M) | Sumita | 1.74578 | 45.1 | |
| K-VC174 | Sumita | 1.7485 | 45.3 |
Similar Glasses (Hoya)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| LAF20 | Hoya | 1.744 | 44.872914 | |
| NBF2 | Hoya | 1.756999 | 47.712499 | |
| LAFL5 | Hoya | 1.719998 | 43.903303 | |
| NBF1 | Hoya | 1.7433 | 49.22 | |
| LAFL6 | Hoya | 1.72 | 42.016239 | |
| MC-NBF1 | Hoya | 1.7433 | 49.33 | |
| M-NBF1 | Hoya | 1.7433 | 49.33 | |
| MP-NBF1 | Hoya | 1.7433 | 49.33 | |
| LAFL4 | Hoya | 1.712704 | 43.295113 | |
| MC-TAF401 | Hoya | 1.77377 | 47.17 |