S-LAL8 by Ohara
Standard
Common
Environmentally Friendly
S-LAL8 by Ohara is a standard optical glass with a common melt frequency. It transmits from 0.29 to 2.40 µm with an nd of 1.712995 and a Vd of 53.867058. It has low thermal expansion (CTE of 6.1×10⁻⁶/K), below average chemical resistance, and low relative cost.
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) | 1.712995 |
|---|---|
| Abbe Number (Vd) | 53.867058 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.365015 — 2.32542 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.30663\,\lambda^2}{\lambda^2 - 0.00611862} + \frac{0.571377\,\lambda^2}{\lambda^2 - 0.0212721} + \frac{1.24304\,\lambda^2}{\lambda^2 - 90.6286}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.1 |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.24 \times 10^{-6} + 2(1.31 \times 10^{-8})\,\Delta T + 3(-3.71 \times 10^{-11})\,\Delta T^2 + \frac{3.81 \times 10^{-7} + 2(4.99 \times 10^{-10})\,\Delta T}{\lambda - 0.252}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | 3 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 52 |
| Alkali Resistance | — |
| Phosphate Resistance | 3 |
Notes
Recommended
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| D13-54 | Corning | 1.713 | 53.843096 | |
| LAK8 | Sumita | 1.713 | 53.9 | |
| K-LaK8 | Sumita | 1.713 | 53.9 | |
| H-LAK7A | CDGM | 1.713 | 53.832974 | |
| LAK8 | Schott | 1.713003 | 53.831633 | |
| N-LAK8 | Schott | 1.713 | 53.83 | |
| M-LAC8 | Hoya | 1.713 | 53.94 | |
| LAC8 | Hoya | 1.713 | 53.94 | |
| MP-LAC8-30 | Hoya | 1.7133 | 53.95 | |
| TAC1 | Hoya | 1.725999 | 53.41758 |
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| LAL8 | Ohara | 1.712995 | 53.845848 | |
| LAL60 | Ohara | 1.725999 | 53.565698 | |
| S-LAL60 | Ohara | 1.725999 | 53.565698 | |
| S-LAL21 | Ohara | 1.703 | 52.379403 | |
| S-LAL19 | Ohara | 1.72916 | 54.095223 | |
| S-LAL18 | Ohara | 1.729157 | 54.680013 | |
| LAL18 | Ohara | 1.729157 | 54.683134 | |
| LAL13 | Ohara | 1.693501 | 53.231566 | |
| S-LAL13 | Ohara | 1.693501 | 53.205327 | |
| L-LAL13 | Ohara | 1.6935 | 53.185799 |