COE Optics' Germanium (Ge) Windows could be with coating options: 3 - 5μm for mid-infrared applications, 3 - 12μm for broadband multispectral applications, or 8 - 12μm for thermal imaging applications. DLC coatings are available.
Sensors as well as various systems on their base are widely used and discover new and new areas for applications on almost all aspects of human activity. Optical IR-sensors and detectors belong to a special niche since are allowed to control and manage the processes which take place at room and much low temperatures. Majority of the devices here are remote-acting and non-contact.
Application of Wien's law to human body emission results in a peak wavelength of:
For this reason, thermal imaging devices for human subjects are most sensitive in the 7 14um range. For monitoring and temperature measurements of higher heated environments, the wavelength range 3-5um is used. For thermal imaging systems, Germanium windows are the best choice.
| Attribute | Specification |
| Material | Germanium (Ge) |
| Index of Refraction nd: | 4.002 |
| Density (g/cm3): | 5.33 |
| Coefficient of Thermal Expansion CTE (10-6/°C): | 6.1 |
| Young's Modulus (GPa): | 102.7 |
| Knoop's Hardness(Gpa) | 780 |
| Poisson's Ratio: | 0.28 |
| Diameter (Φmm) | 1.0~200.00 |
| Thickness (mm) | 1.0 |
| Diameter Tolerance (mm) | ±0.05 |
| Thickness Tolerance (mm) | ±0.02 |
| Clear Aperture | >95% |
| Parallelism | 3 minutes |
| Surface Quality | 80/50~40/20 |
| Flatness (per 25mm@633nm) | 1λ~λ/4@any 25.4mm area |
| Bevel (face width x 45°) | <0.25mm |
Contact us
Hotline: +8625 8361 6456
Add： No1001 Fuying Rd(Union East U-Valley #19 building),Jiangning District,Nanjing 211100,P.R.China
Tel：+86 25 83616456 Ext. 8008
Contact person：Rena Jin
Email：sales@coeoptics.com
