Profile: Knight Optical UK Ltd. specializes in supplying optical components like mirrors, lenses, filters, diffusers, beam splitters, prisms, retarders and polarizers. The ground-glass diffusers are used for scattering incoming light, and reduce directionality in the beam. Ground glass diffusers give a diffusion angle of ± 10º, and are useful for focusing screens and for weak diffusion in illumination systems. Ground glass diffusers are listed with three available materials, LEGB, B270, and UV fused silica. Our glass lenses have a single-layer AR coating on high index flint glass giving over 97% transmittance at the design wavelength.