S-LAH89 by Ohara
Standard
Common
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) | 1.8515 |
|---|---|
| Abbe Number (Vd) | 40.782269 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.404656 — 2.32542 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.95119\,\lambda^2}{\lambda^2 - 0.00976561} + \frac{0.377607\,\lambda^2}{\lambda^2 - 0.0382232} + \frac{1.47757\,\lambda^2}{\lambda^2 - 112.237}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.8 |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.88 \times 10^{-6} + 2(9.71 \times 10^{-9})\,\Delta T + 3(-1.22 \times 10^{-11})\,\Delta T^2 + \frac{8.18 \times 10^{-7} + 2(8 \times 10^{-10})\,\Delta T}{\lambda - 0.213}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.7 |
|---|---|
| Relative Cost | 1.8 |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 2 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 4 |
| Alkali Resistance | — |
| Phosphate Resistance | 1 |
Notes
Recommended
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| D-ZLAF85L-25 | CDGM | 1.8526 | 40.534071 | |
| D-ZLAF85LS-25 | CDGM | 1.85344 | 40.557917 | |
| K-VC185 | Sumita | 1.85375 | 40.6 | |
| D-ZLAF85L | CDGM | 1.8537 | 40.579411 | |
| K-VC185(M) | Sumita | 1.84909 | 40.5 | |
| D-ZLAF85LS | CDGM | 1.8545 | 40.593546 | |
| D-ZLAF85A | CDGM | 1.85222 | 40.10819 | |
| M-TAFD305 | Hoya | 1.85135 | 40.1 | |
| MC-TAFD305 | Hoya | 1.85135 | 40.1 | |
| MP-TAFD305 | Hoya | 1.85135 | 40.1 |
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| L-LAH85 | Ohara | 1.854 | 40.393284 | |
| L-LAH85V | Ohara | 1.854 | 40.378368 | |
| L-LAH83 | Ohara | 1.864 | 40.577742 | |
| L-LAH90 | Ohara | 1.8322 | 40.097595 | |
| S-LAH55 | Ohara | 1.834807 | 42.713673 | |
| LAH55 | Ohara | 1.834807 | 42.72372 | |
| S-LAH55V | Ohara | 1.834807 | 42.725324 | |
| S-LAH55VS | Ohara | 1.834809 | 42.74368 | |
| L-LAH94 | Ohara | 1.860999 | 37.097767 | |
| LAH58 | Ohara | 1.882997 | 40.778667 |