Heat-control optics-Cold mirrors (0°) Cold Mirrors reflect the visible and transmit the near-infrared (heat) spectrum and therefore are another alternative for displacing heat. Cold Mirrors are more expensive than colour glass KG1 filters, however they divide much more sharply between the IR and visible. These Cold Mirrors remove the heat by transmission. They are coated with a multilayer dielectric coating and there for can handle much more power. These Cold Mirrors are ideally suited to illumination systems where high temperatures are not desirable.

Knight Optical > Filters > Heat-control optics-Cold mirrors (45°) 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) IR Price Qty Buy 700FCQ2500 LEBG float 25 dia 3 IR transmitting £11.00 700FCQ4000 LEBG float 40 dia 3 IR transmitting £27.00 700FCQ5000 LEBG float 50 dia 3 IR transmitting £34.00 700FCQ2525 LEBG float 25 x 25 3 IR transmitting £11.00 700FCQ4040 LEBG float 40 x 40 3 IR transmitting £25.00 700FCQ5050 LEBG float 50 x 50 3 IR transmitting £31.00 700FCQ6565 LEBG float 65 x 65 3 IR transmitting £44.00 700FCQ2515 LEBG float 25 x 15 3 IR transmitting £12.00 700FCQ4025 LEBG float 40 x 25 3 IR transmitting £18.50 700FCQ6540 LEBG float 65 x 40 3 IR transmitting £23.50 700FCQ10065 LEBG float 100 x 65 3 IR transmitting £36.00 700FCQ160100 LEBG float 160 x 100 3 IR transmitting £72.00 Knight Optical > Filters > Heat-control optics-Cold mirrors (45°)

Specification   Reflectance (45°)*: > 90% (average over 425-650nm) Transmittance (45°)*: > 85% (average over 800-1200nm) Material data : LEGB float (see materials section) Diameter: +0.0 / -0.2 mm Length/width: ± 0.2 mm Thickness: ± 0.25 mm Surface quality: <60-40 Flatness: < average 5λ over 25mm (sheeted material) Parallelism: < average 10 arcmin (not guaranteed) * Average over wavelength regions stated.

Specific requirements We can manufacture Cold 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   · Cutting down or edged to special shapes and sizes   · Special sizes   · Mounting (circles) Technical Data Sheets A transmittance curve is available (see data sheets) See also Heat-glass filters Hot mirrors Other short-pass filters: Schott colour-glass and UV + IR absorption filters-Glass type