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25.4mm Dia., 4mm Thick, Uncoated, ISP Optics Zinc Sulfide (ZnS) Window | ZL-W-25-4

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Bevel:
Protective as needed
Clear Aperture (%):
85
Clear Aperture CA (mm):
21.59
Diameter (mm):
25.40 +0.00/-0.13
Thickness (mm):
4.00 ±0.13
Coating:
Uncoated
Coefficient of Thermal Expansion CTE (10-6/°C):
6.8
Density (g/cm3):
4.08
Edges:
Fine Ground
Index of Refraction nd:
2.371
Knoop Hardness (kg/mm2):
210
Parallelism (arcmin):
<3
Poisson's Ratio:
0.27
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Zinc Sulfide, Clear Grade
Surface Flatness (P-V):
λ/20 @ 10.6μm
Surface Quality:
60-40
Type:
Protective Window
Wavelength Range (nm):
400 - 12000
Young's Modulus (GPa):
74.5
Type of Window:
Crystal
Model Number:
ZL-W-25-4

Regulatory Compliance

RoHS:
Compliant
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Certificate of Conformance:
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Product Family Description

  • Low Absorption and Low Scatter from 0.4 - 12μm
  • Higher Durability than Zinc Selenide
  • Ideal for Use with Infrared Sensors

ISP Optics Zinc Sulfide (ZnS) Windows feature low absorption and low scatter through the Visible (VIS) and Infrared (IR) spectrum from 0.4 - 12μm. Zinc Sulfide is a chemically vapor deposited (CVD) material which is commonly used in imaging systems featuring a visible and thermal path. Compared to Zinc Selenide (ZnSe), it is slightly harder and more chemically resistant. ISP Optics Zinc Sulfide (ZnS) Windows are ideal for systems that have both visible and mid-wave infrared (MWIR) or long-wave infrared (LWIR) sensors.