Name: 50.8mm Dia., 5mm Thick, 3-5μm BBAR Coated, ISP Optics Silicon (Si) Window | HDAR35-SI-W-50-5
Brand: ISP Optics
SKU: 24-643
Price: €417,50

50.8mm Dia., 5mm Thick, 3-5μm BBAR Coated, ISP Optics Silicon (Si) Window | HDAR35-SI-W-50-5

Stock #24-643 New 3-4 days

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€417,50

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Bevel:

Protective as needed

Clear Aperture (%):

Clear Aperture CA (mm):

43.18

Diameter (mm):

50.80 +0.00/-0.13

Thickness (mm):

5.00 ±0.13

Coating:

BBAR (3000-5000nm)

Coating Specification:

Ravg <0.5% @ 3 - 5μm Rabs <1.5% @ 3 - 5μm

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

2.55

Density (g/cm³):

2.33

Edges:

Fine Ground

Index of Refraction n_d:

3.422 @ 5µm

Knoop Hardness (kg/mm²):

1150

Parallelism (arcmin):

Poisson's Ratio:

0.265

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

Silicon (Si)

Surface Flatness (P-V):

2λ

Surface Quality:

40-20

Type:

Protective Window

Wavelength Range (nm):

3000 - 5000

Young's Modulus (GPa):

140

Type of Window:

Crystal

Model Number:

HDAR35-SI-W-50-5

Regulatory Compliance

RoHS:

Compliant

Certificate of Conformance:

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Product Family Description

Transmission from 1.2 - 7μm
Available Uncoated or HDAR Coated for 3 - 5μm
Ideal for Weight Sensitive Applications

ISP Optics Silicon (Si) Windows provide transmission in the Near-Infrared (NIR) and Mid-Wave Infrared (MWIR) from 1.2 - 7μm. Silicon features a Knoop Hardness of 1150, making it harder and less brittle than Germanium. A High-Durability Anti-Reflection (HDAR) coating option increases the durability of the substrate while significantly improving transmission from 3 - 5μm, enabling use in harsh environments. ISP Optics Silicon (Si) Windows are ideal for weight-sensitive IR applications due to its low density of 2.329 g/cm³, which is half as dense as Germanium and Zinc Selenide. These windows are ideal for NIR imaging applications and are important for detection of sources radiating at a black body temperature of 700K.