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

Z-cut quartz windows

What are you looking for in Stock?

Quartz (SiO2) is a birefringent material commonly used in the manufacture of polarizers (such as wave plates) and windows. The material’s birefringent properties mean it has two refractive indices and incident light splits into ordinary and extraordinary rays. The z-cut is used so that the optic axis of the crystal is perpendicular to the flat surfaces causing the ordinary and extraordinary rays to follow the same path through the crystal and maintain the polarization of the beam.

Quartz cuts and polishes well and is insoluble in water. It transmits highly at 90% in the 0.18-3.5μm range making it appropriate for use in the IR and VIS spectrum. Additionally, the material transmits well above 50µm in the commonly termed Terahertz region. This electro-magnetic radiation is used in airport scanners where it is possible to scan underneath their clothes to prevent weapons being taken on-board the aircraft.

Quartz is typically used as windows, retarders, and wave-plates in the 1 to 3.5µm waveband. Quartz's optical properties make it suitable for this application. Quartz can be used in the waveband above 50µm for terahertz blackbody emission.

Listed below are a range of quality stock z-cut quartz windows in a range of diameters and thicknesses to meet most applications. If you require z-cut quartz windows to a smaller size or a custom aperture we are able to machine our stock windows at short notice. See the ‘docs and drgs’ tab for further information on left and right handed crystal quartz material, or contact our technical sales team directly.

Material: Z-Cut Quartz
Diameter tolerance: +0.0/-0.2mm
Dimensional tolerance: +0.0/-0.2mm
Thickness: +/-0.1mm
Surface quality: <40-20 scratch/dig


Only available while stocks last

  • Edging stock to smaller diameters. Also square and rectangular apertures.
  • Mounting options.
  • AR coatings.

Stock Optics

Get a Custom Quote

Part No. TypeDiameter
CoatingMaterial Price
WQZ50002 Left handed502UncoatedQuartz (Z-Cut) £360.00
WQZ1502 Right handed152UncoatedQuartz (Z-Cut) £49.20
WQZ2001 Right handed201UncoatedQuartz (Z-Cut) £49.20
WQZ2501 Right handed251UncoatedQuartz (Z-Cut) £50.60
WQZ2502 Right handed252UncoatedQuartz (Z-Cut) £50.60
WQZ3501 Right handed351UncoatedQuartz (Z-Cut) £72.30
WQZ3502 Right handed352UncoatedQuartz (Z-Cut) £86.70
WQZ4002 Right handed402UncoatedQuartz (Z-Cut) £115.60
WQZ5002 Right handed502UncoatedQuartz (Z-Cut) £170.75
WQZ20001 Left handed201UncoatedQuartz (Z-Cut) £170.00
WQZ50005 Left handed505UncoatedQuartz (Z-Cut) £420.00
WQZ40002 Left handed402UncoatedQuartz (Z-Cut) £300.00
WQZ25001 Left handed251UncoatedQuartz (Z-Cut) £185.00
WQZ35002 Left handed352UncoatedQuartz (Z-Cut) £260.00
WQZ35001 Left handed351UncoatedQuartz (Z-Cut) £260.00
WQZ25002 Left handed252UncoatedQuartz (Z-Cut) £185.00
WQZ15002 Left handed152UncoatedQuartz (Z-Cut) £160.00
WQZ3203 Right handed323UncoatedQuartz (Z-Cut) £86.70
WQZ1202 Right handed122UncoatedQuartz (Z-Cut) £53.50
WQZ2002 Right handed202UncoatedQuartz (Z-Cut) £49.20
WQZ2005 Right handed200.5UncoatedQuartz (Z-Cut) £55.00
WQZ5008 Right handed50.85UncoatedQuartz (Z-Cut) £170.00
WQZ1002 Right handed102UncoatedQuartz (Z-Cut) £49.20
WQZ8003 Right handed803UncoatedQuartz (Z-Cut) £230.00
WQZ2601 Right handed261UncoatedQuartz (Z-Cut) £55.00
WQZ2526 Right handed252.6UncoatedQuartz (Z-Cut) £57.80
WQZ1302 Right handed132UncoatedQuartz (Z-Cut) £55.00
WQZ2525 Right handed252.5UncoatedQuartz (Z-Cut) £57.80
WQZ6002 Right handed602UncoatedQuartz (Z-Cut) £190.00
WQZ4202 Right handed422UncoatedQuartz (Z-Cut) £130.10
WQZ3515 Right handed351.5UncoatedQuartz (Z-Cut) £166.20

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

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

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