... fluorescence microscopy, image relay, inspection, or spectroscopy. An Achromatic Lens, which is often designed by either cementing two elements ... forms an image free from chromatic aberration. Cemented achromatic lenses significantly reduce coma and chromatic aberration. Best ... reduce surface losses in the visible regions.Specification:Material: BK7, Fused Silica, SF10, CaF2, Sapphire. etc.Paraxial ...