Glass diffusers - ground These 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 (see materials data). Anti-Newton glass is also listed here which gives the weakest diffusion effect. This lightly-etched glass is used to support film enlargers etc. without interference rings (Newton’s rings) appearing.

Knight Optical > Diffusers > Glass diffusers Ground-LEGB This is the section containing Ground-LEGB. Ground-B270 This is the section containing Ground-B270. Ground-UV fused silica This is the section containing Ground-UV fused silica. Anti-Newton glass This is the section containing Anti-Newton glass. Only UK and EU customers are charged VAT at 17.5%, customers outside the EU and EU customers based outside the UK who have a valid EU VAT number will not be charged VAT Knight Optical > Diffusers > Glass diffusers

Specification   Material: B270, Borosilicate, Fused Silica glasses Material Data: (see materials section) Diameter: +0.0 / -0.25 mm Length / Width: ± 0.25 mm Surface A (polished): >60-40 Surface B (diffused): 40 micron finish Flatness (Surface A): <5 wave as standard (sheet material not guaranteed) Parallelism: <0.05 over area

Specific requirements We can manufacture Glass diffusers to any size at short notice, so if your requirements are not listed please contact us by telephone / fax or email: stockrequirement@knightoptical.co.uk Options available   · Mounting (circles up to 50mm dia)   · Cutting down or edged to special shapes and sizes   · Special sizes at short notice   · Other diffused finish See also Flashed Opal Diffusers Plastic Screens