• Material: Vacuum Grade CaF₂
• Wavelength Range: 170 nm - 8.0 μm

Thorlabs CaF₂ Plano-Convex Lenses are popular for many applications in the UV and IR (see related products links above for other UV optics). The refractive index varies from roughly 1.35 to 1.51 through the range of 170 nm - 8.0 μm. With such a low refractive index, CaF₂ lenses may be used uncoated.

Plano-Convex lenses have a positive focal length and approach best form for infinite and finite conjugate applications. Please click here for details concerning Best Form Lenses. These lenses focus a collimated beam to the back focus and collimate light from a point source. They are designed with minimal spherical aberration and have a focal length f= R/(n-1).