QX提供聚四氟(Virgin White PTFE)制造的塑料平凸透镜,在520 GHz的电介质系数低,仅为1.96,折射率为1.4。PTFE的低电介质系数使它的插入损耗很低。
PTFE在太赫兹范围应用中尤其有用,即300 GHz到10 THz,或者30 μm - 1 mm的波长范围。太赫兹广泛应用在光谱仪、航天、远程传感和安全保障(太赫兹成像)中。太赫兹波段位于微波和电磁波光谱之间。该位置影响着应用在太赫兹波段的微波和光学技术的混合。
PTFE Specifications |
|
Index of Refractiona |
1.4 |
Sellmeier Equation |
- |
Abbe Number (Vd) |
Not Defined |
Transmission Range |
30 µm - 1 mm |
Density |
2.2 g/cm3 |
Knoop Hardness |
- |
Young's Modulus |
1.8 GPa |
Shear Modulus (calculated value) |
0.62 GPa |
Bulk Modulus (calculated value) |
7.5 GPa |
Poisson's Ratio |
0.46 |
Coefficient of Thermal Expansion at 20°C |
135 x 10-6 /°C |
Heat Capacity |
1.3 J/(g*K) |
Melting Point |
327 °C |
Change in Index of Refraction with Temperature |
- |