High-index Planoconcave laser lenses These AR coated High-index planoconcave laser lenses complement the lenses in the High-index planoconvex laser lenses section, with which they may be combined to form Galilean beam-expenders. The high index reduces spherical aberration and allows use of an efficient and economical single-layer AR coating.
Knight Optical > Lenses > High-index planoconcave laser lenses 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 Part No. Focal length (mm) Material Diameter (mm) Back focal length (mm) Centre thickness (mm) Edge thickness (mm) Radius of curvature (mm) Price Qty Buy LNL04025 4 SF11 2.5 4.4 0.75 1 3.14   £31.00 LNL0604 6.3 SF11 4 6.9 1 1.4 4.95   £28.50 LNL1006 10 SF11 6.3 10.8 1.5 2.2 7.85   £28.50 LNL1610 16 SF11 10 16.8 1.5 2.5 12.6   £27.50 LNL2516 25 SF11 16 25.8 1.5 3.2 19.6   £28.50 Knight Optical > Lenses > High-index planoconcave laser lenses
Specification   Material: SF11 Material Data: (see materials section) Diameter: +0.0 / -0.10mm Centration Accuracy: 0.05mm Focal Length (@587nm): ± 0.2mm (10mm) ± 2.0% (>10mm)   Centre Thickness: ± 0.15mm   Figure (sphericity) : λ/4   Surface Quality: <40-20 scratch/dig (see quality section)
Specific requirements We can manufacture High-index Planoconvex Laser Lenses to any size or focal length at short notice, so if your requirements are not listed please contact us by telephone/ fax or email: stockrequirement@knightoptical.co.uk Coating High-index Planoconvex Laser Lenses *****TO FIND OUT (multilayer antireflective coating <0.5% @ 248-400nm) (see coatings section) Options available   · Mounting (all items)   · Edging to smaller diameters   · Stock lenses can be edged to smaller diameters See also SF11 Convex Lenses: High-index planoconvex laser lenses