![]() The broadband AR coatings provide <1% average reflectance (per surface) over the 1.65 - 3.0 µm wavelength range or <1.25% average reflectance (per surface) over the 2 - 5 µm wavelength range. ![]() They are available with focal lengths ranging from 20 mm to 200 mm and can be ordered uncoated or with a broadband antireflection (AR) coating. The lenses sold on this page are fabricated from a calcium fluoride (CaF 2) substrate that provides high transmission throughout the mid-IR spectral region, as shown in the Graphs tab. Thorlabs' Mounted Plano-Convex Round Cylindrical Lenses focus or collimate light along a single axis.
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