Acrylic longpass filters
What are you looking for in Stock?
Acrylic colour filters are similar to colour glass filters, achieving their colouration by the use of dyes during the manufacturing process. Acrylic filters are cheaper than glass filters, easier to cut to special sizes and shapes but not quite as robust as glass. However, a rather wider range of spectral characteristics is available than with glass.
Two particularly useful types of acrylic colour filters are those which block the visible but pass near IR, and those that pass the visible but block UV light.
Knight Optical supplies a range of acrylic longpass filters available to purchase direct from stock. We also offer a custom service and can cut filters to size specifically for your application. Contact our technical sales team for more information.
|Diameter:||+0 / -0.2mm|
± 0.5mm (50mm)
± 1mm (400mm)
Colour glass longpass filters
Acrylic longpass filter sets
Polyester longpass filters
Wratten longpass filters
Dichroic longpass filters
Dichroic beamspllitters longwave reflecting filters (45° AOI)
Dichroic beamsplitters longwave/band reflecting filter sets (45° AOI)
Mounted dichroic beamsplitters longwave reflecting filters (45° AOI)
Cold mirrors 45°
Raman edge filters
Raman edge filter sets
- Stock 400mm square sheets can be cut to smaller shapes and sizes.
- Stock sheets can be CNC machined to unusual shapes
- Large 1000x1000mm sheets for cutting into custom sizes.
- Coating options from antireflective to anti-scratch.
- Mounting options.
|Part No.||Wavelength cut-on (nm)||Wavelength cut-off (nm)||Colour||Diameter|
|420FAP2500 Download||420||2200||Colourless (UV blocking)||25||1||£8.55|
|420FAP5050 Download||420||2200||Colourless (UV blocking)||50||50||1||£7.95|
|585FAP2500 Download||585||2200||Light red||25||1||£8.25|
|585FAP5050 Download||585||2200||Light red||50||50||1||£6.85|
|650FAP2500 Download||650||2200||Dark red||25||1||£8.25|
|650FAP5050 Download||650||2200||Dark red||50||50||1||£6.85|
|685FAP2500 Download||685||2200||Black (Passes IR)||25||1||£8.55|
|685FAP5050 Download||685||2200||Black (Passes IR)||50||50||1||£7.95|
|850FAP2500 Download||850||2200||Black (Passes IR from stated W/L)||25||1||£8.55|
|850FAP5050 Download||850||2200||Black (Passes IR from stated W/L)||50||50||1||£7.95|
|420FAP550400 Download||420||2200||Colourless (UV blocking)||550||400||1||£122.50|
|585FAP550400 Download||585||2200||Light Red||550||400||1||£122.50|
|850FAP550400 Download||850||2200||Black (Passes IR from stated W/L)||550||400||1||£181.50|
|650FAP550400 Download||650||2200||Dark Red||550||400||1||£122.50|
|685FAP550400 Download||685||2200||Black (Passes IR)||550||400||1||£181.50|