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

Precision λ/4 front surface mirrors

What are you looking for in Stock?

These are precision grade mirrors but not as expensive as the λ/10 versions. Used in many scientific instruments where quality is important but the use of the λ/10 versions cannot be justified.

We stock ¼ wave plane mirrors in a wide range of coatings to meet most applications:

  • Enhanced aluminium 94%R for visible applications.
  • 99.9% dielectric for laser use in visible applications.
  • UV aluminium for UV applications down to 180nm.
  • 98.5% dielectric for laser use in the NIR applications.
  • Ion plated silver for NIR-2000nm applications.
  • Protected gold for 750nm to far infra-red applications.

Standard sizes can be purchased directly from this site. Knight Optical also offer an extensive custom optic service and can cut and shape precision mirrors to fit our customer's requirements. For more information on custom mirror, or to place an order, please contact our technical sales team.

Material: Soda lime float glass, BK7 or equivalent
Diameter: +0 / -0.2 mm
Length/width: ±0.1mm
Thickness: +0.1 / -0.3mm
Surface quality: <40:20 scratch/dig
Flatness: λ/4 over 90% of mirror dimension
Parallelism: <30 arcsec

Coating:
Visible applications:
Enhanced Ali, R.avg>94%@450-650nm, AOI=0°-45°
All-Dielectric, R.avg>99%@450-700nm, AOI=0°-45° 

  • Edging of stock mirrors to smaller diameters.
  • Stock mirrors can be machined to custom square or rectangular apertures or bespoke designs.
  • Various mounting options.

Stock Optics

Get a Custom Quote

Part No. Wavelength range (nm)CoatingDiameter
(mm)
Length
(mm)
Width
(mm)
Thick
(mm)
Price
(Ex.VAT)
Buy
MQD7575 450-700Dielectric (99% visible)75758 £148.50
MQG7555 750-FAR IRGold (97%@750-FAR IR)758 £118.00
MQG7575 750-FAR IRGold (97%@750-FAR IR)75758 £59.00
MQI2533 700-1064Dielectric (98% NIR)254 £54.75
MQD4040 450-700Dielectric (99% visible)40406 £41.90
MQD1503 450-700Dielectric (99% visible)25156 £33.60
MQD1522 450-700Dielectric (99% visible)153 £19.50
MQD2503 450-700Dielectric (99% visible)25256 £40.45
MQD2533 450-700Dielectric (99% visible)254 £26.10
MQD4033 450-700Dielectric (99% visible)406 £41.90
MQD5033 450-700Dielectric (99% visible)506 £52.30
MQE1002 450-650Enh/Ali (94% visible)10103 £18.75
MQE10077 450-650Enh/Ali (94% visible)10015 £153.25
MQE1022 450-650Enh/Ali (94% visible)103 £19.50
MQE1502 450-650Enh/Ali (94% visible)15153 £23.40
MQE1507 450-650Enh/Ali (94% visible)15103 £21.75
MQE1522 450-650Enh/Ali (94% visible)153 £22.90
MQE2533 450-650Enh/Ali (94% visible)256 £27.50
MQI5050 700-1064Dielectric (98% NIR)50506 £55.60
MQG1622 750-FAR IRGold (97%@750-FAR IR)153 £15.30
MQG2533 750-FAR IRGold (97%@750-FAR IR)254 £18.10
MQG4033 750-FAR IRGold (97%@750-FAR IR)406 £24.10
MQG5066 750-FAR IRGold (97%@750-FAR IR)506 £30.80
MQI4040 700-1064Dielectric (98% NIR)40406 £46.00
MZM4033 180-650Ali/MgF² (85% UV)406 £20.30
MZM5066 180-650Ali/MgF² (85% UV)506 £22.40
MQG5050 750-FAR IRGold (97%@750-FAR IR)50508 £30.80
MZM7555 180-650Ali/MgF² (85% UV)758 £50.60
MQD5050 450-700Dielectric (99% visible)50508 £52.30
MGI4040 700-1064Dielectric (98% NIR)40406 £46.00
MZM4040 180-650Ali/MgF² (85% UV)40406 £20.30
MGI4033 700-1064Dielectric (98% NIR)406 £60.00
MQI4033 700-1064Dielectric (98% NIR)406 £92.00
MQI5033 700-1064Dielectric (98% NIR)506 £111.25
MQI1522 700-1064Dielectric (98% NIR)153 £46.00
MGI7575 700-1064Dielectric (98% NIR)75758 £90.00
MQD7555 450-700Dielectric (99% visible)758 £74.30
MGI1522 700-1064Dielectric (98% NIR)153 £23.00
MGI5050 700-1064Dielectric (98% NIR)50508 £60.00
MZM5050 180-650Ali/MgF² (85% UV)50508 £44.85
MGI2533 700-1064Dielectric (98% NIR)254 £40.00
MZM7575 180-650Ali/MgF² (85% UV)75758 £50.60
MZM1522 180-650Ali/MgF² (85% UV)153 £22.35
MQG4040 750-FAR IRGold (97%@750-FAR IR)40406 £24.10
MGI7555 700-1064Dielectric (98% NIR)758 £110.00
MQI7575 700-1064Dielectric (98% NIR)75758 £160.00

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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