Sheet Polarisers - Visible The former ‘Polaroid’ materials are now made by 3M under the name ‘Vikuiti’. In addition to the standard grades we offer the newer types HN38S and HN42HE, which combine very good extinction with high transmittance, at some extra cost, and HN22 which has the widest wavelengths outside this range. As a result of the 3M takeover, some materials are likely to become obsolete, although we large stocks are available at present.
Knight Optical > Polarisers  > Sheet polarisers-Visible range  > HN38 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. Material Size/dimensions (mm) Thickness (mm) Price Qty Buy OYL38-2500 CAB Lamination (Lacquered) 25 dia 0.75 ±0.1 £5.80 OYL38-5050 CAB Lamination (Lacquered) 50 x 50 0.75 ±0.1 £5.30 OYL38-100100 CAB Lamination (Lacquered) 100 x 100 0.75 ±0.1 £15.80 OYL38-150150 CAB Lamination (Lacquered) 150 x 150 0.75 ±0.1 £26.24 OYL38-990431 HN38 replacement material 990 x 431 0.7 £225.00 ONL38-2500 CAB Lamination (Not lacquered) 25 dia 0.28 ±0.1 £5.30 ONL38-5050 CAB Lamination (Not lacquered) 50x50 0.28 ±0.1 £4.70 ONL38-100100 CAB Lamination (Not lacquered) 100x100 0.28 ±0.1 £15.80 ONL38-150150 CAB Lamination (Not lacquered) 150 x 150 0.28 ±0.1 £26.24 ONL38-635457 HN38 replacement material 635 x 457 0.25 £182.00 Knight Optical > Polarisers  > Sheet polarisers-Visible range  > HN38
Specification   Diameter: +0 / -0.25mm Length, width: ±0.5mm (<100mm) ±1mm (100-400mm) nominal (>400mm) Axis direction: typ. ±2° AR Coating: Multilayer for visible
Transmission Data
Grade Single sheet 2 sheets parallel 2 sheets at 90º (nom.) (max.) HN42 42 34 0.5 0.9 HN38 38 29 0.05 0.1 HN32 32 20 0.005 0.01 HN22 22 10 0.0005 0.001 HN38S 38 29 0.0004 - HN42HE 42 34 0.002 -
Note Rectangular sheets have axis parallel to short edge. Specific requirements We can manufacture Sheet polarisers 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 Technical Data Sheets Available on request. Options available   · Special sizes and shapes   · Mounting   · Special Glass laminating   · Special AR coatings