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All Products / Optics / Windows and Diffusers / UV and IR Windows / Lithium Fluoride (LiF) Windows
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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

20mm Dia., 2mm Thick, Uncoated, Lithium Fluoride (LiF) Window

Lithium Fluoride (LiF) Windows

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Stock #19-727 In Stock
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C$439.26
Qty 1-10
C$439.26
Qty 11+
C$396.23
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Specifications

General

Type:
Protective Window

Physical & Mechanical Properties

Bevel:
Protective as needed
Clear Aperture (%):
90
Clear Aperture CA (mm):
18.00
Diameter (mm):
20.00 +0.00/-0.10
Thickness (mm):
2.00 ±0.10
Edges:
Fine Ground
Knoop Hardness (kg/mm2):
102
Parallelism (arcmin):
<3
Poisson's Ratio:
0.33
Young's Modulus (GPa):
64.97

Optical Properties

Abbe Number (vd):
97.29
Axis Orientation:
Random
Coating:
Uncoated
Index of Refraction (nd):
1.392
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Lithium Fluoride (LiF)
Surface Flatness (P-V):
λ/2 @ 632.8nm
Surface Quality:
60-40
Wavelength Range (nm):
150 - 6000

Material Properties

Coefficient of Thermal Expansion CTE (10-6/°C):
37
Density (g/cm3):
2.64

Regulatory Compliance

RoHS:
Compliant
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Certificate of Conformance:
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Product Details

  • High Transmission from 150nm - 6μm
  • Excellent Vacuum UV (VUV) Transmission
  • Low Index of Refraction

Lithium Fluoride (LiF) Windows provide high, flat transmission from 150nm to 6μm. Lithium fluoride has excellent transmission in the vacuum ultraviolet (VUV) wavelength range of 150 - 200nm. Lithium fluoride also has a low index of refraction, allowing these windows to be used without an anti-reflection (AR) coating. Lithium Fluoride (LiF) Windows are ideal for use as UV transmission windows in spectroscopy applications, as a diffracting element in X-ray spectrometry, or as infrared windows for thermal imaging applications.

Note: Lithium fluoride is sensitive to thermal shock and is attacked by atmospheric moisture at temperatures above 400°C.

Technical Information

Special Handling

These optics require special handling to avoid damage and ensure long-term performance. Proper handling, cleaning, and storage are essential to maintain optical quality. Explore our Optics Cleaning Resources for step-by-step guides and best practices. For personalized assistance, Email us or Chat with our technical support team.

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