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All Products / Optics / Windows and Diffusers / UV and IR Windows / ISP Optics Thallium Bromoiodide (KRS-5) Windows
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25.4mm Dia., 3mm Thick, Uncoated, ISP Optics Thallium Bromoiodide (KRS-5) Window | K5-W-25-3

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Thallium Bromoiodide (KRS-5) Windows

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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):
3.00 ±0.13
Coating:
Uncoated
Coefficient of Thermal Expansion CTE (10-6/°C):
6.0
Density (g/cm3):
7.37
Edges:
Fine Ground
Index of Refraction nd:
2.45 @ 1μm 2.38 @ 4μm 2.37 @ 10μm 2.21 @ 40μm
Knoop Hardness (kg/mm2):
40.2
Parallelism (arcmin):
<3
Poisson's Ratio:
0.37
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Thallium Bromoiodide (KRS-5)
Surface Flatness (P-V):
λ/10 @ 10.6μm
Surface Quality:
60-40
Type:
Protective Window
Wavelength Range (nm):
700 - 40000
Young's Modulus (GPa):
31
Model Number:
K5-W-25-3

Regulatory Compliance

RoHS 2015:
Compliant
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Certificate of Conformance:
View
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Reach 240:
Compliant
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Product Family Description

  • Broad Transmission from 700nm - 40μm
  • Non-Hydroscopic
  • Ideal for FTIR Spectroscopy with Aqueous Samples

ISP Optics Thallium Bromoiodide (KRS-5) Windows provide flat transmission across the broad wavelength range of 700nm - 40μm. KRS-5 is non-hygroscopic and relatively insoluble in water, allowing for its use in FTIR spectroscopy as liquid cell windows for the analysis of aqueous samples. These windows also have good chemical resistance except against strong acids. ISP Optics Thallium Bromoiododide (KRS-5) Windows are ideal for use in FTIR spectroscopy, as protective windows for acid-sensitive or hygroscopic optics, or as substrates for infrared holographic polarizers.

Note: Thallium bromoiodide (KRS-5) is a toxic material that can be absorbed through the skin. Gloves must be worn while handling this material. KRS-5 has a tendency to cold flow and the shape of these optics may change over time.