Schott Colour-glass filters Solid Colour Glass Filters are useful for wavelength selection absorbsion, and achieve much higher blocking densities than dichroics. The spectral transmission properties are uniform over the entire aperture of the Colour Glass Filter. A wider range of Schott Colour Glass filters are available, and the following thickness has been chosen for average blocking percentages in relation to filter type. If you require a different wavelength block, we can make a simple calculation in relation to the thickness to achieve your required wavelength. Our photonic filters (540FCS5050) are used with silicon detectors or cameras to adapt the spectral response to be approximately that of the ee.
Knight Optical > Filters > Colour filters - Glass type > Short-pass filters > Schott (25 diameter mm) 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 Diameter (mm) Thickness (mm) Wavelength (nm) Price Qty Buy 465FCS2500 BG3 25 1 465nm (Deep blue, UV transmitting) £14.85 465FCS2511 BG3 25 3 465nm (Deep blue, UV transmitting) £14.85 538FCS2500 Hoya B-410 25 2.5 538nm (Bright blue, UV transmitting) £24.50 575FCS2500 BG39 25 3 575nm (Bright blue, strongly absorbs red/NIR) £14.85 611FCS2500 BG38 25 3 610nm (Pale blue, absorbs red/NIR) £14.85 668FCS2500 KG5 (untoughened) 25 3 668nm (IR absorbing) £14.85 662FCS2500 KG3 (untoughened) 25 3 662nm (IR absorbing) £14.85 716FCS2500 KG1 25 3 716nm (IR absorbing, toughened) £12.50 Knight Optical > Filters > Colour filters - Glass type > Short-pass filters > Schott (25 diameter mm)
Specification   Material: Schott Colour Glass Diameter: +0.0 / -0.25 mm Length / Width: ± 0.25 mm Thickness: ± 0.20 mm Surface Quality: <60-40 Flatness: <2.5λ over 90% test area Parrallelism: <3 arcmin
Note Wavelength listed in table is transition wavelength (T=Tmax/2) for long-pass and short-pass filters, and peak for band-pass filters. Specific requirements We can manufacture Schott Colour-glass filters 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   · AR Coating   · Cutting down or edged to special shapes and sizes   · Mounting (circles) Technical Data Sheets Are available for each filter (see materials section) See also Glass neutral density filters UV + IR absorption filters-Glass type UV transmitting filters-Glass type Heat-glass filters For storage boxes (see accessories)