The PAC019AR.14 Visible Achromatic Doublet Lens is a 430 to 700 nm antireflection coated, 1/2 inch (12.7 mm) diameter, BaF N10 and SF 14 precision achromatic doublet lens with an effective focal length of 19.0 mm. This achromat is computer designed to effectively minimize spherical aberration and coma when operating at infinite conjugate ratio, yielding smaller focused spot sizes. Unlike singlet lenses, this results in a constant focal length independent of aperture and far better off-axis performance. Achromats are superior to singlet lenses for monochromatic applications at any visible wavelength.


PAC019AR。14可见消色差双透镜为430 ~ 700 nm的防反射涂层,直径1/2英寸(12.7 mm), BaF N10和SF 14精密消色差双透镜,有效焦距19.0 mm。这种消色差仪是计算机设计的,在无限共轭比下有效地减小了球面像差和彗差,从而减小了聚焦点的尺寸。与单线透镜不同的是,这种透镜的焦距与光圈无关,而且离轴性能要好得多。对于任何可见波长的单色应用,消色差透镜都优于单线透镜。