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TECHSPEC® Germanium (Ge) Windows are available off-the-shelf with three anti-reflection coating options: 3 - 5μm for mid-infrared applications, 3 - 12μm for broadband multispectral applications, or 8 - 12μm for thermal imaging applications. Due to its high index of refraction (around 4.0 from 2 - 14μm), an anti-reflection coating is recommended on these germanium windows for sufficient transmission in the region of interest. Germanium is subject to thermal runaway, meaning the transmission decreases as temperature increases. As such, TECHSPEC Germanium (Ge) Windows should be used at temperatures below 100°C. Germanium’s high density (5.33 g/cm3) should be considered when designing for weight-sensitive systems. The Knoop Hardness of germanium (780) is approximately twice that of magnesium fluoride, making it ideal for infrared applications requiring rugged optics.
AR COATED GERMANIUM | |
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Typical transmission of a 3mm thick Ge window with BBAR (3000-5000nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: Ravg <3% @ 3000 - 5000nm Data outside this range is not guaranteed and is for reference only. |
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Typical transmission of a 3mm thick Ge window with BBAR (3000-12000nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: Ravg <5.0% @ 3 - 12μm Data outside this range is not guaranteed and is for reference only. |
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Typical transmission of a 3mm thick Ge window with BBAR (8000-12000nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: Ravg <3.0% @ 8 - 12μm Data outside this range is not guaranteed and is for reference only. |
Title | Type | Compare | Stock Number | Price | Buy | |
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50.0mm Optic Dia., Optic Mount | Fixed | #64-567 |
C$64.40
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50.0mm Optic Dia., Optic Mount | Fixed | #64-568 |
C$64.40
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50.0mm Optic Dia., Fixed Optic Mount, Quick Start Optical Mounts | Fixed | #17-516 |
C$124.60
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10.0 - 60.0mm Optic Height, Metric Bar-Type Optic Holder | Fixed | #55-530 |
C$141.40
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7.0 - 67.0 Optic Height, English Bar-Type Optic Holder | Fixed | #03-669 |
C$151.20
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8.0 - 118.0 Optic Height, English Bar-Type Optic Holder | Fixed | #03-666 |
C$156.80
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2"/50.8mm Diameter, Bar Type Lens / Filter Holder, Quick Start Optical Mounts | Fixed | #17-530 |
C$210.35
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50.0/50.8mm Optic Dia., Optical Cell Assembly | Fixed |
#36-465
Clearance
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C$242.20
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50.0/50.8mm Optic Dia., X-Y Translating Optic Mount | Adjustable - Linear (XY) | #62-957 |
C$403.20
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50.0/50.8mm Optic Diameter, X-Y Translating Optic Mount, Quick Start Optical Mounts | Adjustable - Linear (XY) | #17-514 |
C$462.35
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5.0 - 100.0mm Optic Dia., Self-Centering Jaw Clamp | Fixed | #16-078 |
C$536.20
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50.0/50.8mm Optic Dia., Precision Gimbal Mount | Adjustable - Gimbal | #55-000 |
C$669.20
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50/50.8mm ID, Precision Gimbal Mount, Quick Start Optical Mounts | Adjustable - Gimbal | #17-518 |
C$731.85
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50.0/50.8mm Optic Dia., X-Y-Z Translating Optic Mount | Adjustable - Linear (XYZ) | #62-960 |
C$791.00
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50.0/50.8mm Optic Dia., 5 Axes Optical Mount | Adjustable - Linear (XYZ) & Tip-Tilt | #13-778 |
C$1,099.00
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