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Knight Optical(UK) Ltd - [email protected] - +44 (0)1622 859444

Ground glass diffusers

What are you looking for in Stock?

Knight Opticals' ground glass diffusers scatter light at angles up to 10°. They are used predominantly in two applications; firstly for focussing and secondly to enhance illumination uniformly in lighting systems.

We stock two types of ground glass diffuser; borosilicate diffusers that cover a range of 310 - 2700nm and UV silica ground glass diffusers which work down to 170nm in the UV.

Ground glass diffusers diffuse light less thoroughly than our opal diffusers but do so with less scattering losses. Our stock diffusers are available to purcahse directly from this site, and we are also able to cut and shape diffuers to custom sizes. For more information on our custom capabilities or to place an order, please contact our technical sales team.

Material: Borosilicate or equivalentUV fused silica
Diameter: +0.0 / -0.25 mm
Length / width: ± 0.25 mm
Surface A (polished): <60-40 scratch-dig
Surface B (diffused): 40 micron finish
Flatness (surface A): <5 wave as standard (sheet material not guaranteed)


  • Cutting down of stock components to smaller diameters and sizes.
  • Mounting options.
  • Larger sheets available for custom shapes and sizes.

Stock Optics

Get a Custom Quote

Part No. Diameter
MaterialWavelength (nm)GritWavelength range (nm)Thick
DGF1000 Download 102UVFS175-250040 £22.45
DGF1500 Download 15UVFS40175-25002 £27.95
DGF2500 Download 252UVFS175-250040 £36.45
DGF4000 Download 403UVFS175-250040 £55.45
DGF5000 Download 504UVFS175-250040 £67.45
DGF5050 Download 50502UVFS175-250040 £67.45
DGP1000 Download 10Borosilicate40320-26003.3 £14.25
DGP10000 Download 1003.3Borosilicate320-260040 £29.45
DGP100100 Download 1001003.3Borosilicate320-260040 £26.45
DGP1300 Download 12.53.3Borosilicate320-260040 £13.45
DGP1600 Download 163.3Borosilicate320-260040 £13.45
DGP2500 Download 25Borosilicate40320-26003.3 £14.25
DGP2525 Download 25253.3Borosilicate320-260040 £12.95
DGP4000 Download 403.3Borosilicate320-260040 £18.95
DGP4040 Download 40403.3Borosilicate320-260040 £16.95
DGP5000 Download 503.3Borosilicate320-260040 £19.95
DGP5011 503.75Borosilicate320-260040 £20.95
DGP5050 Download 50503.3Borosilicate320-260040 £18.45
DGP6300 Download 633.3Borosilicate320-260040 £24.95

Get a Custom Quote

Get in touch

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
+1 401 583 7846

International Shipping

We are able to ship to most countries at good rates, please click here for more info.

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