Germanium(Ge) Windows / Lenses
Material:
Germanium
Thickness:
+/-0.2mm
Surface Flatness:
N<1λ
Coating:
Uncoated,
AR/AR@8-12um, Ravg<2.0%
Diameter Tolerance:
+0.0,-0.1mm
Surface Quality:
80/50~40/20
Parallelism:
<2 arc Min
Silicon and Germanium lens: for infrared measurement devices for non-contact temperature measurement, including stationary IR thermometers, and infrared cameras for point of Care Testing (POCT) devices.
Germanium windows are ideal for IR applications at a broad range of wavelengths, including use in lowerpower CO2 lasers. Germanium also has low dispersion, ideal for imaging applications.
Germanium(Ge) Windows / Lenses Main Specification
| wdt_ID | Attributes | Value |
|---|---|---|
| 1 | Material | Germanium |
| 15 | Dimension Range | Diameter: 3~300mm Thinckness:1~50mm |
| 17 | Tolerance | +/-0.01mm or customize |
| 18 | Surface Quality | 80/50~40/20 or customize |
| 19 | Surface Flatness | N＜1λ or customize |
| 20 | Clear Aperture | ＞90% |
| 21 | Parallelism | ＜10” |
| 37 | Chamfer | Protective＜0.5mm x 45° |
| 38 | Coating | Uncoated AR/AR DLC coating |
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Dimension and shape can be customized, such as: Circular, Square, Triangle or others.
 |
 |
Within the range of 2-12um, Germanium is the most commonly used material for fabricating high infrared imaging system.
- Thermal imager
- Infrared temperature instrument
- Long pass filter (for wavelengths greater than 2 µm)
- Night sight
- Armament
- Space satellite
- High transmittance at 2-12um
- High refractive index (4.0 at 2-14um)
- Germanium is inert to air, water, alkalis, and many acids
wdt_ID Part No. Material S/D dia (mm) Thickness Coating
27
WIN6101
Germanium
60/40
10.0
1.0
None
90
WIN61252
Germanium
60/40
12.5
2.0
None
142
WIN61272
Germanium
60/40
12.7
2.0
None
143
WIN6252
Germanium
60/40
25.0
2.0
None
144
WIN62542
Germanium
60/40
25.4
2.0
None
186
WIN6402
Germanium
60/40
40.0
2.0
None
187
WIN6503
Germanium
60/40
50.0
3.0
None
188
WIN61011
Germanium
60/40
10.0
1.0
AR/AR@8-12um, Ravg＜2.0%
189
WIN612521
Germanium
60/40
12.5
2.0
AR/AR@8-12um, Ravg＜2.0%
190
WIN612721
Germanium
60/40
12.7
2.0
AR/AR@8-12um, Ravg＜2.0%
191
WIN62521
Germanium
60/40
25.0
2.0
AR/AR@8-12um, Ravg＜2.0%
192
WIN625421
Germanium
60/40
25.4
2.0
AR/AR@8-12um, Ravg＜2.0%
193
WIN64021
Germanium
60/40
40.0
2.0
AR/AR@8-12um, Ravg＜2.0%
194
WIN65031
Germanium
60/40
50.0
3.0
AR/AR@8-12um, Ravg＜2.0%
| wdt_ID | Part No. | Material | S/D | dia (mm) | Thickness | Coating |
|---|---|---|---|---|---|---|
| 27 | WIN6101 | Germanium | 60/40 | 10.0 | 1.0 | None |
| 90 | WIN61252 | Germanium | 60/40 | 12.5 | 2.0 | None |
| 142 | WIN61272 | Germanium | 60/40 | 12.7 | 2.0 | None |
| 143 | WIN6252 | Germanium | 60/40 | 25.0 | 2.0 | None |
| 144 | WIN62542 | Germanium | 60/40 | 25.4 | 2.0 | None |
| 186 | WIN6402 | Germanium | 60/40 | 40.0 | 2.0 | None |
| 187 | WIN6503 | Germanium | 60/40 | 50.0 | 3.0 | None |
| 188 | WIN61011 | Germanium | 60/40 | 10.0 | 1.0 | AR/AR@8-12um, Ravg＜2.0% |
| 189 | WIN612521 | Germanium | 60/40 | 12.5 | 2.0 | AR/AR@8-12um, Ravg＜2.0% |
| 190 | WIN612721 | Germanium | 60/40 | 12.7 | 2.0 | AR/AR@8-12um, Ravg＜2.0% |
| 191 | WIN62521 | Germanium | 60/40 | 25.0 | 2.0 | AR/AR@8-12um, Ravg＜2.0% |
| 192 | WIN625421 | Germanium | 60/40 | 25.4 | 2.0 | AR/AR@8-12um, Ravg＜2.0% |
| 193 | WIN64021 | Germanium | 60/40 | 40.0 | 2.0 | AR/AR@8-12um, Ravg＜2.0% |
| 194 | WIN65031 | Germanium | 60/40 | 50.0 | 3.0 | AR/AR@8-12um, Ravg＜2.0% |
Related Resource for reference
Overview
• Transmittance of IR glasses
• Comparison IR vs. Visible glasses
• Properties of some common IR glasses
– Germanium
– Silicon
– Zinc Sulfide
– Zinc Selenide
– Magnesium Fluoride
– Sapphire
• Concerns using lens design programs
• References OPTI 521 2
Materials for Infrared Optics
Related Products
Zinc Sulfide (ZnS) Windows
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