12.5mm Dia. x 18mm FL NIR II Coated Calcium Fluoride PCX Lens

Product Details Low Index of Refraction Vacuum Grade UV Substrate Uncoated, VIS-NIR, and NIR II Broadband AR Coating Options TECHSPEC Calcium Fluoride Plano-Convex Lenses are ideal for demanding applications that require superior performance from the ultraviolet through the mid-wave infrared spectra. The lenses’ low refractive index, high laser damage threshold, and low axial and radial-stress birefringence are highly suitable for use with Excimer lasers or for integration into infrared systems. Additionally, calcium fluoride features low solubility and offers superior hardness to comparable fluoride-based substrates, making these PCX lenses capable of withstanding harsh environments and exposure to the elements. TECHSPEC Calcium Fluoride Plano-Convex Lenses are offered in 12.5mm, 25mm, and 50mm diameters. The lenses are available uncoated, VIS-NIR, or with NIR II broadband AR coating options. Note: Calcium fluoride is a relatively soft optical material and requires careful handling as it is very easily scratched. Calcium fluoride is also susceptible to thermal shock. Specifications General Type: Plano-Convex Lens Physical & Mechanical Properties Diameter (mm): 12.50 +0.00/-0.10 Center Thickness CT (mm): 4.00 ±0.1 Edge Thickness ET (mm): 1.17 Centering (arcmin): <3 Clear Aperture CA (mm): 11.5 Bevel: Protective as needed Optical Properties Effective Focal Length EFL (mm): 18.00 @ 266nm Back Focal Length BFL (mm): 14.92 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Calcium Fluoride (CaF 2 ) f/#: 1.44 Coating: NIR II (750-1550nm) Wavelength Range (nm): 200 - 7000 Surface Quality: 40-20 Power (P-V) @ 632.8nm: λ Irregularity (P-V) @ 632.8nm: λ/2 Radius R 1 (mm): 8.32 Numerical Aperture NA: 0.35 Axis Orientation: Random Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 235: Compliant ×