Uncoated, Optics AMTIR-1 Window

Key Features:

  1. Wide Transmission Range:
    • Wavelength Range: 750 nm to 14 µm
    • Versatility: Capable of transmitting a broad spectrum of infrared light, making these windows suitable for a variety of IR applications.
  2. Excellent Chemical Resistance:
    • Acid Resistance: Highly resistant to acids, ensuring durability and longevity even in harsh chemical environments.
    • Water Insoluble: Not affected by water, further enhancing their suitability for demanding applications.
  3. Low Index of Refraction:
    • Optical Performance: Lower index of refraction compared to germanium windows, reducing reflection losses and improving overall optical performance.




SHAPE Optics AMTIR-1 (Ge33As12Se55) Windows Specifications

Parameter Specification
Bevel Protective as needed
Clear Aperture CA (mm) 21.59
Clear Aperture (%) 85
Diameter (mm) 25.40 +0.00/-0.13
Thickness (mm) 1.00 ± 0.13
Coating Uncoated
Coefficient of Thermal Expansion (CTE) (10^-6/°C) 12.6
Density (g/cm³) 4.43
Edges Fine Ground
Index of Refraction (n_d) 2.519 @ 3µm
2.503 @ 8µm
2.490 @ 12µm
Knoop Hardness (kg/mm²) 170
Poisson’s Ratio 0.215
Surface Flatness (P-V) λ/10 @ 10.6µm
Parallelism (arcmin) < 3
Substrate AMTIR-1 (Ge33As12Se55)
Surface Quality 40-20
Type Protective Window
Wavelength Range (nm) 750 – 14,000
Young’s Modulus (GPa) 21.2
Model Number AM-W-25-1

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Material and Optical Properties:

  1. Material Composition:
    • Chalcogenide Material: Made from Ge33As12Se55, a glass composition known for its excellent infrared transmission properties.
  2. Thermal Stability:
    • High Temperature Tolerance: Can be used at elevated temperatures up to 300°C without experiencing thermal runaway, making them suitable for high-temperature environments.
  3. Mechanical Properties:
    • Durability: The robust material structure provides excellent durability and resistance to harsh environmental conditions.


  1. Infrared Imaging Systems:
    • Thermal Cameras: Ideal for use in thermal imaging systems where a broad transmission range and chemical resistance are required.
    • Forward-Looking Infrared (FLIR) Cameras: Suitable for FLIR systems used in defense, surveillance, and automotive applications.
  2. Non-Contact Temperature Measurement:
    • IR Thermometers: Used in non-contact IR thermometers for accurate temperature measurements in industrial and medical settings.
  3. Laser Systems:
    • Low Power IR Lasers: Compatible with low power infrared laser systems, providing efficient transmission and durability.
  4. Protective Windows:
    • Harsh Environments: Act as protective windows in environments with high chemical exposure, ensuring longevity and reliability of the underlying sensors and optical components.

SHAPE Optics AMTIR-1 Windows, constructed from the chalcogenide material Ge33As12Se55, offer superior infrared transmission from 750 nm to 14 µm, excellent chemical resistance to acids, and a low index of refraction. Their thermal stability up to 300°C and water insolubility make them ideal for use in harsh environments. These windows are perfectly suited for infrared imaging systems, non-contact temperature measurement, FLIR cameras, and low power infrared laser systems, providing reliable and durable performance in demanding applications.

Additional information

Weight 0.5 kg
Dimensions 12 × 10 × 8 cm


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