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Knight Optical(UK) Ltd - sales@knightoptical.co.uk - +44 (0)1622 859444

Colour glass longpass filters

What are you looking for in Stock?

Colour Glass filters are useful for selective wavelength absorption and therefore achieve high out of band blocking. Colour glass type Longpass filters have very low transmission in short wavelengths and high transmission in the long wavelengths. These filters are used in range of spectral selection scientific instrument applications.

The long-pass range of color glass filters listed here has uniform spectral transmission properties over their entire aperture. A wide range of Colour Glass Longpass Filters are available as 50x50mm and 25mm diameter filters, stocked in the options below.

Stock colour glass filters are available to purchase directly from this website. To enquire about our customer colour glass capabilities, or to place a custom order, please contact our technical sales team.

Material: Colour glass
Diameter: +0.0 / -0.20 mm
Length / width: ± 0.20 mm
Thickness: ± 0.20 mm
Surface quality: <60-40 scratch/dig
Parallelism: <3 arcmin

Note
Wavelength cut-on listed in table is transition cut-on wavelength (T=Tmax/2)
Wavelength cut-off listed in table is transition cut-off wavelength (T=Tmax/2)
Wavelength listed in table is transition wavelength (T=Tmax/2) for long-pass and short-pass filters, and peak for band-pass filters. 

  • Mounting of diameters and squares.
  • Antireflective coatings can be applied to one or both faces for improved transmission.
  • Cutting down or edged to special shapes and sizes at short notice.
  • Available in sets, supplied in a wooden storage box for research and laboratory use.

Stock Optics

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Part No. Wavelength cut-on (nm)Wavelength cut-off (nm)Equivalent materialColourDiameter
(mm)
Length
(mm)
Width
(mm)
Thick
(mm)
Price
(Ex.VAT)
Buy
315FCS2500 Download 3202725WG320Colourless filters- transmitting visible and some UV253 £16.50
315FCS5050 Download 3202725WG320Colourless filters- transmitting visible and some UV50503 £32.90
345FCS2500 Download 3402746UV34 (Hoya)Colourless filters- transmitting visible and some UV252.5 £16.50
345FCS5050 Download 3402746UV34 (Hoya)Colourless filters- transmitting visible and some UV50502.5 £32.90
361FCS2500 Download 3602755WG360Colourless filters- transmitting visible and some UV253 £16.50
361FCS5050 Download 3602755WG360Colourless filters- transmitting visible and some UV50503 £32.90
375FCS2500 3752770GG375Colourless- UV-absorbing253 £16.50
375FCS5050 3752770GG375Colourless- UV-absorbing50503 £32.90
385FCS2500 Download 3852735GG385Colourless- UV-absorbing253 £16.50
385FCS5050 Download 3852735GG385Colourless- UV-absorbing50503 £32.90
395FCS2500 Download 3952740GG395Colourless- UV-absorbing253 £16.50
395FCS5050 Download 3952740GG395Colourless- UV-absorbing50503 £32.90
420FCS2500 Download 4202740GG420Very pale yellow- UV-absorbing253 £16.50
420FCS5050 Download 4202740GG420Very pale yellow- UV-absorbing50503 £32.90
435FCS2500 Download 4352727GG435Very pale yellow- UV-absorbing253 £16.50
435FCS5050 Download 4352727GG435Very pale yellow- UV-absorbing50503 £32.90
1000FCS2500 Download 10002750RG1000Black- pass of IR from stated wavelength253 £19.50
455FCS2500 Download 4552735GG455Pale yellow253 £16.50
455FCS5050 Download 4552735GG455Pale yellow50503 £32.90
475FCS2500 Download 4752735GG475Yellow253 £16.50
475FCS5050 Download 4752735GG475Yellow50503 £32.90
495FCS2500 Download 4952740GG495Yellow253 £16.50
495FCS5050 Download 4952740GG495Yellow50503 £32.90
515FCS2500 Download 5152740OG515Deep yellow253 £16.50
515FCS5050 Download 5152740OG515Deep yellow50503 £32.90
1000FCS5050 Download 10002750RG1000Black- pass of IR from stated wavelength50503 £36.25
530FCS2500 Download 5302745OG530Yellow/ orange253 £16.50
530FCS5050 Download 5302745OG530Yellow/ orange50503 £32.90
550FCS2500 Download 5502750OG550Orange253 £16.50
550FCS5050 Download 5502750OG550Orange50503 £32.90
570FCS2500 Download 5702740OG570Orange/ red253 £16.50
570FCS5050 Download 5702740OG570Orange/ red50503 £32.90
590FCS2500 Download 5902740OG590Bright red253 £16.50
590FCS5050 Download 5902740OG590Bright red50503 £32.90
610FCS2500 Download 6102740RG610Red253 £16.50
610FCS5050 Download 6102740RG610Red50503 £32.90
630FCS2500 Download 6302740RG630Deep red253 £16.50
630FCS5050 Download 6452740RG630Deep red50503 £32.90
645FCS2500 Download 6452740RG645Very deep red253 £16.50
645FCS5050 Download 6452740RG645Very deep red50503 £32.90
665FCS2500 Download 6652740RG665Extreme red/ IR transmitting253 £16.50
665FCS5050 Download 6652740RG665Extreme red/ IR transmitting50503 £32.90
695FCS2500 Download 6952740RG695Extreme red/ IR transmitting253 £16.50
695FCS5050 Download 6952740RG695Extreme red/ IR transmitting50503 £32.90
715FCS2500 Download 7152765RG715Black- pass of IR from stated wavelength253 £19.50
715FCS5050 Download 7152765RG715Black- pass of IR from stated wavelength50503 £36.25
780FCS2500 Download 7802780RG780Black- pass of IR from stated wavelength253 £19.50
780FCS5050 Download 7802780RG780Black- pass of IR from stated wavelength50503 £36.25
850FCS2500 Download 8502763RG850Black- pass of IR from stated wavelength253 £19.50
850FCS5050 Download 8502763RG850Black- pass of IR from stated wavelength50503 £36.25
280FCS2500 Download 2802750WG280Colourless filters- transmitting visible and some UV253 £16.50
280FCS5050 Download 2802750WG280Colourless filters- transmitting visible and some UV50503 £32.90
780FCS3300 7802780RG780Black- pass of IR from stated wavelength333 £28.50

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Our Multi-Lingual Sales Team are here to help with your requirments:

UK +44 (0)1622 859444
UK +44 (0)1622 850614
UK +44 (0)1622 851078
US +001 401-583-7846

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