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

UV optical flats

What are you looking for in Stock?

Optical flats are single precision flat surfaces. They are used as reference surfaces to compare flatness of a substrate where flatness is unknown. When a high quality optical flat is placed on top of a polished substrate and used in conjunction with a monochromatic light source light bands are formed. The monochromatic light has a helium filled tube source which eliminates all colours except a “yellowish” orange. The light bands that are present are known as interference fringes and their shape represents how flat the part being tested measures. Dependent on how many rings are formed or how straight the presented lines are is an indication of how flat the tested part is.

Optical flats are used for testing gauge blocks. Optical flats are also used in interferometers and high quality flat optical mirror and window substrates for laser applications.

These Quartz optical flats are well suited to UV applications down to 280nm. We offer different stability and surface quality. UV quartz optical flats are also available in three grades, lambda/4, lambda/8 and lambda/16 to meet all applications.

All optical flats are tested on our Zygo Verifire XPZ interferometer system fitted with the latest Mx® software. Optical flats are supplied certified in a quality wooden box.  Knight Optical also offer a rework and calibration service for optical flats, please enquire.

Material: Quartz
Surface quality: <40:20 scratch/ dig
Surface finish: <5 angstrom off pitch
Flatness face 1& 2 on dual face polished flats: As specified over 90% aperture
Flatness face 1 on single sided polished flats:
Flatness face 2 on single sided polished flats:
As specified over 90% aperture
Commercial polish
Parallelism: <5 arcmin (or better if required
  • We can manufacture Quartz and Zerodur Optical Flats to any size at short notice. Simply use the Custom Optics button.
  • Optical flats can be coated with a range of standard or custom mirror coatings for high quality mirrors or beamsplitters.

Stock Optics

Get a Custom Quote

Part No. TypeMaterialFlatnessDiameter
Flatness (λ)Thick
TYQ2620 Single sidedFused quartzLambda/20266 £110.00
TYQ7720 Single sidedFused quartzLambda/207615 £240.00
TYQ2720 Single sidedFused quartzLambda/202610 £115.00
TYQ15210 Single sidedFused quartzLambda/1015225 £620.00
TYQ5220 Single sidedFused quartzLambda/205110 £184.00
TYQ2610 Single sidedFused quartzLambda/10266 £77.00
TYQ10220 Single sidedFused quartzLambda/2010117 £330.00
TYQ15220 Single sidedFused quartzLambda/2015225 £730.00
TYQ12710 Single sidedFused quartzLambda/1012620 £400.00
TYQ30210 Single sidedFused quartzLambda/1030240 £3,160.00
TYQ10210 Single sidedFused quartzLambda/1010117 £280.00
TYQ12720 Single sidedFused quartzLambda/2012620 £500.00
TYQ7710 Single sidedFused quartzLambda/107615 £200.00
TYQ2710 Single sidedFused quartzLambda/102610 £80.00
TYQ12712 Double sidedFused quartzLambda/1012620 £480.00
TYQ5210 Single sidedFused quartzLambda/105110 £125.00
TYQ20210 Single sidedFused quartz202Lambda/1030 £1,220.00
TYQ25210 Single sidedFused quartzLambda/1025235 £1,740.00

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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