LAK6 by Sumita
Obsolete
Very Rare
Environmentally Dangerous
LAK6 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.30 to 2.00 µm with an nd of 1.6425 and a Vd of 58.1. It has average chemical resistance and dangerous environmental properties.
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) | 1.6425 |
|---|---|
| Abbe Number (Vd) | 58.1 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.27 — 2.0 µm |
$$n(\lambda) = \sqrt{2.65156 - 0.0106785\,\lambda^2 + 0.0170867\,\lambda^{-2} - 9.28234 \times 10^{-5}\,\lambda^{-4} + 6.09705 \times 10^{-5}\,\lambda^{-6} - 3.54902 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
Chemical Resistance
| Climatic Resistance | 2 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 4 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| C42-58 | Corning | 1.642502 | 58.061633 | |
| LAKN6 | Schott | 1.642499 | 57.962061 | |
| LAC6 | Hoya | 1.642498 | 57.959359 | |
| BSM36 | Ohara | 1.642495 | 58.369399 | |
| S-BSM36 | Ohara | 1.642495 | 58.369399 | |
| S-BSM93 | Ohara | 1.640998 | 56.927542 | |
| BSM93 | Ohara | 1.640998 | 56.927542 | |
| LAC7 | Hoya | 1.6516 | 58.4 | |
| H-LAK50A | CDGM | 1.6516 | 58.403057 | |
| LACL1 | Hoya | 1.640851 | 56.835319 |