K-CD45 by Sumita
Standard
Medium
Precision Molding
Environmentally Friendly
K-CD45 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 1.6932 and a Vd of 33.7. It has medium thermal expansion (CTE of 9.1×10⁻⁶/K), excellent chemical resistance, and precision molding compatibility.
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 | |
| N-SF8 | Schott | 1.68894 | 31.31 | |
| P-SF8 | Schott | 1.68893 | 31.25 | |
| C89-31 | Corning | 1.689004 | 31.210861 | |
| ZF10 | CDGM | 1.688934 | 31.184753 | |
| SF8 | Schott | 1.688932 | 31.176063 | |
| H-ZF10 | CDGM | 1.68893 | 31.16057 | |
| MP-FD80 | Hoya | 1.68893 | 31.16 | |
| MC-FD80 | Hoya | 1.68893 | 31.16 |