K-VC80(M) by Sumita
Preferred
Very Common
Environmentally Friendly
K-VC80(M) by Sumita is a preferred optical glass with a very common melt frequency. It transmits from 0.27 to 2.00 µm with an nd of 1.68983 and a Vd of 52.9. It has low thermal expansion (CTE of 6.4×10⁻⁶/K) and average chemical resistance.
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Optical Properties
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.4 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.4 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.72 \times 10^{-6} + 2(1.69 \times 10^{-8})\,\Delta T + 3(-1.41 \times 10^{-10})\,\Delta T^2 + \frac{6.62 \times 10^{-7} + 2(9.46 \times 10^{-10})\,\Delta T}{\lambda - 0.149}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 4 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| D-LAK6-25 | CDGM | 1.69281 | 53.049215 | |
| L-LAL15 | Ohara | 1.69304 | 52.9306 | |
| L-LAL13 | Ohara | 1.6935 | 53.185799 | |
| M-LAC130 | Hoya | 1.6935 | 53.2 | |
| MC-LAC130 | Hoya | 1.6935 | 53.2 | |
| MP-LAC130 | Hoya | 1.6935 | 53.2 | |
| P-LAK35 | Schott | 1.6935 | 53.2 | |
| S-LAL13 | Ohara | 1.693501 | 53.205327 | |
| D-LAK6 | CDGM | 1.69384 | 53.128245 | |
| LAL13 | Ohara | 1.693501 | 53.231566 |