BaF2 window - Spectro Optics
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BaF2 window

BaF₂ windows offer excellent transmission from the deep ultraviolet (200 nm) through the mid-infrared (12 μm) range, covering both UV and IR applications. As an alkaline earth fluoride crystal, BaF₂ provides superior radiation resistance compared to other fluoride materials, making it well-suited for demanding environments.
Key advantages include a low refractive index, minimal chromatic aberration, and broad spectral coverage in one component. BaF₂ is commonly used in UV-Vis spectroscopy, infrared optics, radiation detection, and excimer laser systems. It performs reliably across a wide operating temperature range.
At Spectro Optics, we supply high-quality BaF₂ windows with standard or custom coatings to meet your specific optical requirements.

Specifications

Material: Barium Fluoride (BaF2)
Diameter: 5mm - 280mm
Spectral Range: 200nm - 12μm
Surface Quality: 20-10 (Scratch-Dig)
Parallelism: < 3 arcsec
Transmittance: > 90%@400nm-10μm, uncoated 
Coating: AR, BBAR, Protective coatings available

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