S-TIH13 by Ohara
Standard
Rare
Environmentally Friendly
S-TIH13 by Ohara is a standard optical glass with a rare melt frequency. It transmits from 0.37 to 2.40 µm with an nd of 1.740769 and a Vd of 27.789359. It has medium thermal expansion (CTE of 8.3×10⁻⁶/K), excellent 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) | 1.740769 |
|---|---|
| Abbe Number (Vd) | 27.789359 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.404656 — 2.32542 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.62225\,\lambda^2}{\lambda^2 - 0.0118368} + \frac{0.293845\,\lambda^2}{\lambda^2 - 0.0590208} + \frac{1.99225\,\lambda^2}{\lambda^2 - 171.96}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.3 |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.65 \times 10^{-6} + 2(1.1 \times 10^{-8})\,\Delta T + 3(-3.44 \times 10^{-11})\,\Delta T^2 + \frac{8.43 \times 10^{-7} + 2(1.07 \times 10^{-9})\,\Delta T}{\lambda - 0.3}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | 1 |
Notes
Recommended
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| ZF50 | CDGM | 1.74077 | 27.76788 | |
| FD13 | Hoya | 1.740774 | 27.764991 | |
| H-ZF50 | CDGM | 1.74077 | 27.760063 | |
| E-FD13 | Hoya | 1.74077 | 27.76 | |
| SF13 | Sumita | 1.74077 | 27.7 | |
| SF13 | Schott | 1.740771 | 27.59998 | |
| SF54 | Schott | 1.7408 | 28.090813 | |
| D40-28 | Corning | 1.740001 | 28.102623 | |
| SF3 | Sumita | 1.74 | 28.2 | |
| SF3 | Schott | 1.74 | 28.2 |
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| PBH13W | Ohara | 1.740769 | 27.793228 | |
| PBH13 | Ohara | 1.740769 | 27.793228 | |
| PBH3 | Ohara | 1.739998 | 28.283809 | |
| PBH3W | Ohara | 1.739998 | 28.287409 | |
| S-TIH3 | Ohara | 1.739998 | 28.296005 | |
| S-TIH10 | Ohara | 1.72825 | 28.460599 | |
| PBH10 | Ohara | 1.728249 | 28.4623 | |
| PBH4 | Ohara | 1.755199 | 27.512146 | |
| PBH4W | Ohara | 1.755199 | 27.512146 | |
| S-TIH4 | Ohara | 1.755199 | 27.512089 |