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All Products / Optics / Windows and Diffusers / UV and IR Windows / SCHOTT Chalcogenide Window Substrates
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Chalcogenide Glass Window, IRG27, 25.4mm Dia. 3mm Thick

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Stock #72-864 New In Stock
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C$385.00
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C$385.00
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Bevel:
Protective as needed
Diameter (mm):
25.40 ± 0.1
Thickness (mm):
3.00 ± 0.1
Coating:
Uncoated
Coefficient of Thermal Expansion CTE (10-6/°C):
22.5 · 10–6/K (20 - 100°C)
Density (g/cm3):
3.2
Edges:
Polished
Index of Refraction nd:
2.4841 @ 1μm
2.4129 @ 5μm
2.3842 @ 10μm
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
SCHOTT IRG27
Surface Flatness (P-V):
<5 λ P-V @ 632.8
Surface Quality:
60-40
Transformation Temperature (°C):
197
Type:
IR Window
Wavelength Range (nm):
1000 - 10000
Young's Modulus (GPa):
16.8
Note:
Delivered in vacuum-sealed packaging

Regulatory Compliance

RoHS:
Compliant
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Certificate of Conformance:
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Product Family Description

  • SCHOTT IRG Infrared Glasses
  • Lightweight with Broad Transmission Bands in the SWIR, MWIR, and LWIR Spectra
  • Ideal Alternative to Germanium

SCHOTT Chalcogenide Glass Windows are suitable for a large range of IR applications and are an ideal alternative to Germanium substrates. Available in 5 different glass types optimized for excellent transmission in the NIR-LWIR ranges, these windows feature low dn/dt and dispersion with high color correction. Low density, coefficient of thermal expansion, and chemical resistance make them a great choice for low SWaP applications and harsh environments with changing temperatures. SCHOTT Chalcogenide Glass Windows are available in a standard 25.4mm diameter and a 3mm thickness. These windows are ideal for ideal for thermal imaging, spectroscopy, and sensing applications.

  • IRG22 – Offers excellent transmission in the NIR range. Chemical Formula Ge33As12Se55
  • IRG24 – Offers a low coefficient of thermal expansion for heat-sensitive applications. Chemical Formula Ge10As40Se50
  • IRG25 – Offers excellent SWIR, MWIR, and LWIR transmission. Chemical Formula Ge28Sb12Se60
  • IRG26 – Offers an exceptionally broad transmission range, with minimal absorption at 12.5um. Germanium Free. Chemical Formula As40Se60
  • IRG27 – Combines a high SWIR/MWIR transmission with a low coefficient of thermal expansion. Germanium Free. Chemical Formula As2S3