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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:
Length/Width:

Thickness:
+0/-0.2mm
<50mm ± 0.5mm
≥50mm ± 1mm
± 0.2mm

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.

24 Items

Name Wavelength cut-on (nm) Wavelength cut-off (nm) Colour Diameter (mm) Length (mm) Width (mm) Thickness (mm) Price Buy
420FAP2500 pdf 420 2200 Colourless (UV blocking) 25 1
£17.00
420FAP5050 pdf 420 2200 Colourless (UV blocking) 50 50 1
£15.90
420FAP550400 pdf 420 2200 Colourless (UV blocking) 550 400 1
£247.50
510FAP2500 pdf 510 2200 Yellow 25 1
£17.00
510FAP5050 pdf 510 2200 Yellow 50 50 1
£15.90
510FAP550400 pdf 510 2200 Yellow 550 400 1
£247.50
585FAP2500 pdf 585 2200 Light red 25 1
£17.00
585FAP5050 pdf 585 2200 Light red 50 50 1
£15.90
585FAP550400 pdf 585 2200 Light Red 550 400 1
£247.50
620FAP2500 pdf 620 2200 Red 25 1
£17.00
620FAP5050 pdf 620 2200 Red 50 50 1
£15.90
620FAP550400 pdf 620 2200 Red 550 400 1
£247.50
630FAP2500

pdf

630 2200 Red 25 1
£17.00
630FAP5050

pdf

630 2200 Red 50 50 1
£15.90
630FAP550400

pdf

630 2200 Red 550 400 1
£247.50
650FAP2500 pdf 650 2200 Dark red 25 1
£17.00
650FAP5050 pdf 650 2200 Dark red 50 50 1
£15.90
650FAP550400 pdf 650 2200 Dark Red 550 400 1
£247.50
685FAP2500 pdf 685 2200 Black (Passes IR) 25 1
£18.10
685FAP5050 pdf 685 2200 Black (Passes IR) 50 50 1
£17.55
685FAP550400 pdf 685 2200 Black (Passes IR) 550 400 1
£291.50
850FAP2500 pdf 850 2200 Black (Passes IR from stated W/L) 25 1
£18.10
850FAP5050 pdf 850 2200 Black (Passes IR from stated W/L) 50 50 1
£17.55
850FAP550400 pdf 850 2200 Black (Passes IR from stated W/L) 550 400 1
£291.50

24 Items

1

Acrylic Colour Filters

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Wavelength cut-on (nm)