Plano-concave lens, Fused silica, Ø 22.4 mm, f = -150 mm, ARHS-YAG

Plano-concave singlet in Fused silica, Ø 22.4 mm, focal length -150 mm. ARHS-YAG V-coat coating. Negative focal length: diverges the beam, for beam expanders and to shorten system length.