Precision plane mirrors These Precision Plane Mirrors are available in two grades (λ/10) & (λ/4) with guaranteed flatness and parallel tolerances. These Precision plane Mirrors are suitable for interferometry and other demanding applications. Low-expansion glass (see materials section) is used for the (λ/10) series to reduce thermal distortion.

Knight Optical > Mirrors > Plane mirrors - Precision Grade (Lambda/4) Aluminium/Magnesium fluoride (UV applications) This is the section containing Aluminium/Magnesium fluoride (UV applications). Enhanced aluminium (Visible applications) This is the section containing Enhanced aluminium (Visible applications). All-dielectric 99% (Visible applications) This is the section containing All-dielectric 99% (Visible applications). Ion-plated silver (Visible & IR applications) This is the section containing Ion-plated silver (Visible & IR applications). Protected gold (IR applications) This is the section containing Protected gold (IR applications). 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 Bulk Discounts! Where (B) appears next to a price below, bulk prices are available, click the (B) button to view! Knight Optical > Mirrors > Plane mirrors - Precision Grade (Lambda/4)

Specification   Material: Soda lime float glass, LEGB Material data: (see materials section) Diameter: +0 / -0.2 mm Length/width: ±0.1mm Thickness: +0.1 / -0.3mm Surface quality: <40:20 Flatness: λ/4 over 90% of mirror dimension λ/10 over entire mirror area     Parallelism: <30 arcsec Coating: UV aliminum / Al+MgF² / UV use (see MU01 coating spec) Enhanced aluminium / Visible use (see MV01 coating spec) Protected aluminium / Visible use (see MV02 coating spec) All-dielectric 99% / Visible use (see MV006 coating spec) Ion-plated silver / Visible&IR use (see MV03 coating spec) All-dielectric 98% / IR use (see MI06 coating spec) Protected gold / IR use (see MI01 coating spec)

Specific requirements We can manufacture Precision Plane Mirrors 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)   · Cutting down or edged to special sizes See also Plane mirrors 1λ over 25mm, Plane mirrors general-purpose grade