Achromatic Lens, Cemented double lens, doublet

achromatic lens , cemented lens, Doublet. It is used for optical imagine,with high quality Key Specifications/Special Features: * EFL:±1% * Dia:+0,-0.05 * center thickness tolerance:±0.25 * Surface quality:60-40 stratch/dig * surface precision:5/2~λ/2 at 546.1nm * centration:3 arc min * Designwave-length:486.1mm,587.6mm,656.3mm An achromatic lens or achromat is a lens that is designed to limit the effects…