S-BAL3 by Ohara
Standard
Medium
Environmentally Friendly
S-BAL3 by Ohara is a standard optical glass with a medium melt frequency. It transmits from 0.33 to 2.40 µm with an nd of 1.571351 and a Vd of 52.952106. It has medium thermal expansion (CTE of 9.5×10⁻⁶/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) | 1.571351 |
|---|---|
| Abbe Number (Vd) | 52.952106 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.365015 — 2.32542 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.29367\,\lambda^2}{\lambda^2 - 0.00800368} + \frac{0.13244\,\lambda^2}{\lambda^2 - 0.0354711} + \frac{1.10197\,\lambda^2}{\lambda^2 - 134.517}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 9.5 |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-5.7 \times 10^{-6} + 2(1.05 \times 10^{-8})\,\Delta T + 3(-3.78 \times 10^{-11})\,\Delta T^2 + \frac{4.4 \times 10^{-7} + 2(5.55 \times 10^{-10})\,\Delta T}{\lambda - 0.262}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
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 |
|---|---|---|---|---|
| BAFL3 | Hoya | 1.571348 | 52.982526 | |
| BALF3 | Sumita | 1.57135 | 53.0 | |
| ADF1 | Hoya | 1.564997 | 52.958253 | |
| BAFL4 | Hoya | 1.579572 | 53.705963 | |
| BALF4 | Schott | 1.579569 | 53.708241 | |
| H-BAF3 | CDGM | 1.57957 | 53.711637 | |
| N-BALF4 | Schott | 1.57956 | 53.87 | |
| BPG2 | Sumita | 1.5592 | 53.9 | |
| K-BPG2 | Sumita | 1.5592 | 53.9 | |
| B58-53 | Corning | 1.557511 | 52.533062 |
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| BAL3 | Ohara | 1.571351 | 52.968158 | |
| S-BAL2 | Ohara | 1.570989 | 50.799858 | |
| BAL2 | Ohara | 1.570989 | 50.797474 | |
| BAL7 | Ohara | 1.58875 | 51.179278 | |
| BAL5 | Ohara | 1.547393 | 53.550738 | |
| BAL14 | Ohara | 1.568832 | 56.339266 | |
| S-BAL14 | Ohara | 1.568832 | 56.363897 | |
| S-BAL11 | Ohara | 1.572501 | 57.74298 | |
| BAL11 | Ohara | 1.572501 | 57.760854 | |
| SSL2 | Ohara | 1.529441 | 51.722557 |