S-TIL2 by Ohara
Standard
Medium
Environmentally Friendly
S-TIL2 by Ohara is a standard optical glass with a medium melt frequency. It transmits from 0.34 to 2.40 µm with an nd of 1.54072 and a Vd of 47.227127. It has medium thermal expansion (CTE of 8.2×10⁻⁶/K), good 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) | 1.54072 |
|---|---|
| Abbe Number (Vd) | 47.227127 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.365015 — 2.32542 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.23401\,\lambda^2}{\lambda^2 - 0.00869508} + \frac{0.0959797\,\lambda^2}{\lambda^2 - 0.0465611} + \frac{1.20504\,\lambda^2}{\lambda^2 - 137.953}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.2 |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-4 \times 10^{-7} + 2(1.28 \times 10^{-8})\,\Delta T + 3(-4.06 \times 10^{-11})\,\Delta T^2 + \frac{5.09 \times 10^{-7} + 2(5.15 \times 10^{-10})\,\Delta T}{\lambda - 0.272}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | 2 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | 1 |
Notes
Recommended
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| H-QF8 | CDGM | 1.54072 | 47.230007 | |
| E-FEL2 | Hoya | 1.54072 | 47.2 | |
| LLF2 | Sumita | 1.54072 | 47.2 | |
| FEL2 | Hoya | 1.540718 | 47.198247 | |
| QF8 | CDGM | 1.540718 | 47.198243 | |
| LLF2 | Schott | 1.540719 | 47.171344 | |
| QF70GFI | CDGM | 1.547 | 48.161896 | |
| LLF8 | Sumita | 1.53256 | 46.0 | |
| LLF1 | Sumita | 1.54814 | 45.9 | |
| LLF1HTi | Schott | 1.54815 | 45.9 |
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| PBL2 | Ohara | 1.54072 | 47.23368 | |
| FTM8 | Ohara | 1.532565 | 45.914102 | |
| S-TIL1 | Ohara | 1.548141 | 45.784277 | |
| PBL1 | Ohara | 1.548141 | 45.781144 | |
| PBL1Y | Ohara | 1.548141 | 45.733282 | |
| PBL7 | Ohara | 1.548689 | 45.555746 | |
| S-TIL6 | Ohara | 1.531717 | 48.840718 | |
| PBL6 | Ohara | 1.531717 | 48.904553 | |
| PBL6Y | Ohara | 1.531717 | 48.956017 | |
| SSL2 | Ohara | 1.529441 | 51.722557 |