Name: 25.4mm Dia., 3mm Thick, 8-12μm BBAR Coated, ISP Optics Germanium (Ge) Window | AR812-GE-W-25-3
Brand: ISP Optics
SKU: 24-572
Price: €217,50

25.4mm Dia., 3mm Thick, 8-12μm BBAR Coated, ISP Optics Germanium (Ge) Window | AR812-GE-W-25-3

Stock #24-572 New 3-4 days

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€217,50

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Bevel:

Protective as needed

Clear Aperture (%):

Clear Aperture CA (mm):

21.59

Diameter (mm):

25.40 +0.00/-0.13

Thickness (mm):

3.00 ±0.13

Coating:

BBAR (8000-12000nm)

Coating Specification:

R_avg <0.5% @ 8 - 12μm
R_abs <1% @ 8 - 12μm

Coefficient of Thermal Expansion CTE (10^-6/°C):

6.1

Density (g/cm³):

5.33

Edges:

Fine Ground

Index of Refraction n_d:

4.002 @ 11µm

Knoop Hardness (kg/mm²):

780

Parallelism (arcmin):

Poisson's Ratio:

0.28

Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More

Germanium (Ge)

Surface Flatness (P-V):

λ/10 @ 10.6μm

Surface Quality:

40-20

Type:

Protective Window

Wavelength Range (nm):

2000 - 14000

Young's Modulus (GPa):

102.7

Type of Window:

Crystal

Model Number:

AR812-GE-W-25-3

Regulatory Compliance

RoHS:

Compliant

Certificate of Conformance:

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Product Family Description

Minimal Chromatic Aberration Due to Low Dispersion
Uncoated Transmission from 2 – 16µm
Available with BBAR or DLC Coating for 8 – 12µm

ISP Optics Germanium (Ge) Windows provide transmission and low absorption through the Long-Wave Infrared (LWIR) spectrum, making it useful for thermal imaging applications. Germanium features a Knoop Hardness of 780, making it ideal for infrared applications requiring rugged optics. These windows are available uncoated, Broadband Anti-Reflection (BBAR) coated for 8 – 12µm, or Diamond-Like Carbon (DLC) coated for 8 – 12µm. ISP Optics Germanium Windows are ideal for integration into thermal imaging systems, especially those that require rugged optics. Germanium is subject to thermal runaway, meaning that the transmission decreases as temperature increases. As such, these germanium windows should be used at temperatures below 100°C.