K-CD35(M) by Sumita
Standard
Very Rare
Environmentally Friendly
K-CD35(M) by Sumita is a standard optical glass with a very rare melt frequency. It transmits from 0.34 to 2.00 µm with an nd of 1.57583 and a Vd of 35.2. It has medium thermal expansion (CTE of 8.3×10⁻⁶/K) and good 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) | 8.3 |
|---|---|
| TCE 100/300°C (10-6/K) | 10.6 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-7.75 \times 10^{-6} + 2(1.35 \times 10^{-8})\,\Delta T + 3(-2.49 \times 10^{-10})\,\Delta T^2 + \frac{7.61 \times 10^{-7} + 2(9.55 \times 10^{-10})\,\Delta T}{\lambda - 0.276}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 2 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| FTM16 | Ohara | 1.592701 | 35.296315 | |
| S-FTM16 | Ohara | 1.592701 | 35.310075 | |
| FF5 | Hoya | 1.5927 | 35.45 | |
| TIFN5 | Schott | 1.593555 | 35.514529 | |
| KBR | Generic IR | 1.559967 | 31.977241 | |
| PBM18Y | Ohara | 1.595509 | 38.767114 | |
| F14 | Schott | 1.601401 | 38.231923 | |
| F14HT | Schott | 1.601389 | 38.266237 | |
| E-F5 | Hoya | 1.60342 | 38.01 | |
| H-F1 | CDGM | 1.60342 | 38.010877 |