High-index planoconvex laser lenses Lenses in high-index glass (n=1.785) have only 55% of the spherical aberration of equivalent BK7 lenses, and can be very efficiently AR coated with single-layer coating. Beam expanders etc. can therefore be made with diffraction-limited performance and very high transmittance, and suitable for high powers, having no cemented interfaces.
Knight Optical > Lenses > Planoconvex Laser lenses - High Index > AR coated 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. Focal length (mm) Material Diameter (mm) Back focal length (mm) Centre thickness (mm) Edge thickness (mm) Diffraction-limited aperture (mm) Price Qty Buy LPH0303 2.5 SF11 2.5 1.8 1.2 0.75 1.01 £28.60 LPH0403 4 SF11 2.5 3.4 1 0.75 1.44 £27.90 LPH0404 4 SF11 4 3 1.7 1 1.44 £27.90 LPH0604 6.3 SF11 4 5.5 1.4 1 2.03 £27.30 LPH1004 10 SF11 4 9.3 1.3 1 2.87 £27.30 LPH0606 6.3 SF11 6.3 4.8 2.6 1.5 2.03 £26.10 LPH1606 16 SF11 6.3 14.9 1.9 1.5 4.08 £28.60 LPH2506 25 SF11 6.3 24 1.8 1.5 5.71 £28.60 LPH4010 40 SF11 10 38.9 1.9 1.5 8.11 £28.60 LPH6316 63 SF11 16 61.7 2.2 1.5 11.4 £31.50 LPH10016 100 SF11 16 98.9 1.9 1.5 16.1 £31.50 LPH2525 25 SF11 25 21.6 6 1.5 5.71 £28.60 LPH16025 160 SF11 25 158.2 2.1 1.5 23 £31.50 Knight Optical > Lenses > Planoconvex Laser lenses - High Index > AR coated
Specification Biconvex lenses.    Material: BK7 (or B270), SF11 for lower spherical aberrations (See spherical aberration calculation section)  Material Data: (see materials section)  Diameter: +0.0 / -0.10mm    Centring Accuracy: < 0.05mm (F.L 25mm) < 1.5mrad (F.L > 25mm)  Focal Length: (@ 587nm) ± 0.2mm ( 10mm) ± 2.0% (> 10mm)  Figure (sphericity): λ/4  Surface Quality: <40-20 scratch/dig (see quality section)	Click for Surface Reflectance Graph
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 Planoconvex lenses are coated on both faces with (***ASK**** ROB**) (see coatings section) Options available   · Mounting (all items)   · Stock lenses can be edged to smaller diameters See also SF11 concave lenses: High-index planoconcave laser lenses