Germanium lenses window are used in optical systems for infrared imaging or monitoring, telemetry or infrared spectroscopy.
Germanium Lens Product Characteristics:
Germanium can be used in radiation detectors and thermoelectric materials.
High purity germanium single crystal has high refraction coefficient, transparent to infrared light, does not transmit visible light and ultraviolet light, can be used as germanium windows, prisms or lenses that specialize in infrared light.
Germanium’s ability to absorb light with the rise in temperature and continue to strengthen, 100 degrees Celsius or more on the transmittance of the obvious impact, seriously affecting the performance of the optical system. Germanium elements are usually coated with a reflection-reducing film due to their high surface reflectivity.
Germanium Lens Processing Parameters：
| Material: Ge (Germanium) | Surface quality: 40/20 |
|---|---|
| Diameter tolerance: +0/0.13mm | Clear Aperture: >90% |
| Wavelength: 8-12um | Bevelling: 0.2×45 degree |
| Thickness tolerance: +0.2mm | Parallelism: <1 arc min |
| Surface accuracy: λ/[email protected] | AR/AR coating R<0.5% per surface |
| Diameter | Focal Length |
| 12mm | 50.8mm |
| 16.5mm | 20mm |
| 20mm | 50.8mm |
Germanium lens processing we from the processing difficulty is divided into commercial grade, precision grade and high precision basic three categories, about the choice of germanium lens please select the appropriate type according to the actual application.
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