Elliptical plane mirrors These Elliptical Plane Mirrors are available in two grades, a general-purpose grade for less demanding systems or a λ/4 grade with guaranteed flatness and parallel tolerances for more demanding applications. Elliptical Plane Mirrors are typically used at 45° where a circular cross section of a given size is asked for.  They are used as secondary mirrors in Newton telescopes or mounting in a tube where maximum aperture is required.

Knight Optical > Mirrors > Elliptical plane - Precision Grade (Lambda/4) 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! PDF Part No. Thickness (mm) Coating Minor axis diameter (mm) Major axis (mm) Price Qty Buy MLQ2500 6 Protected aluminium (Visible applications) 25 35 £28.75 MLQ4000 10 Protected aluminium (Visible applications) 40 57 £40.50 MLQ5000 10 Protected aluminium (Visible applications) 50 71 £67.00 Knight Optical > Mirrors > Elliptical plane - Precision Grade (Lambda/4)

Specification   Material: Soda lime float glass Material data: (see materials section) Diameter: +0 / -0.25 mm Thickness: ±0.15 Surface quality: <60:40 Flatness:       General-purpose grade 1λ over 25mm dia. test area   Precision grade λ/4 over entire mirror area Parallelism:     General-purpose grade <1 arcmin   Precision grade <30 arcsec Coating: Protected aluminium / Visible use (see MV02 coating spec)

Specific requirements We can manufacture these Elliptical 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