K-CD45(M) by Sumita
Standard
Medium
Environmentally Friendly
K-CD45(M) by Sumita is a standard optical glass with a medium melt frequency. It transmits from 0.34 to 2.00 µm with an nd of 1.68673 and a Vd of 34.1. It has medium thermal expansion (CTE of 9.1×10⁻⁶/K) and excellent 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) | 9.1 |
|---|---|
| TCE 100/300°C (10-6/K) | 12.1 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-4.77 \times 10^{-6} + 2(1.49 \times 10^{-8})\,\Delta T + 3(-1.38 \times 10^{-10})\,\Delta T^2 + \frac{7.8 \times 10^{-7} + 2(7.44 \times 10^{-10})\,\Delta T}{\lambda - 0.271}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| CSBR | Generic IR | 1.69706 | 34.108015 | |
| BAFD14 | Hoya | 1.699678 | 34.925493 | |
| KZFS12 | Schott | 1.696 | 36.29 | |
| C72-32 | Corning | 1.672698 | 32.31788 | |
| N-SF5 | Schott | 1.67271 | 32.25 | |
| SF5 | Schott | 1.6727 | 32.21 | |
| ZF2 | CDGM | 1.672707 | 32.180986 | |
| FD5 | Hoya | 1.672701 | 32.173263 | |
| H-ZF2 | CDGM | 1.6727 | 32.171186 | |
| E-FD5 | Hoya | 1.6727 | 32.17 |