Plano-concave spherical lenses have one plano and one spherical concave surface, while their focal lengths are negative. These lenses provide the best performance when used for 5X to infinite-conjugate ratio applications, e.g. collimating a convergent beam, diverging a collimated beam. To prevent spherical aberrations collimated beam should always be incident on curved lens surface and vice versa.

Main features

■ Fabricated from high-quality UV grade fused silica and BK7 glasses

■ Standard diameters are ø12,7 mm and ø25,4 mm

■ Focal length selection from -20 mm to -10000 mm

■ Antireflective coatings, custom substrate material, dimensions, and focal lengths available upon request