Knight Optical 's QA Stock & Custom Optical Flats

23 Jun 2017

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 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 sub-straights for laser applications.

This range of quartz optical flats are single-sided. Quartz has low thermal expansion properties and is very durable and cost effective solution over UV grade fused silica. Quartz optical flats are also available in lambda/10 and lambda/20 types from stock. We can also supply lambda/4, lambda/8 and lamda/16 optical flats on short lead times.

Each quartz optical surfaces flat is tested on our Zygo Verifire XPZ interferometer system fitted with the latest Mx® software and are supplied certified in a quality wooden box.

Knight Optical also offer a rework and calibration service for optical flat, please enquire.

Options available

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.
We also stock Monochromatic light units which have a low pressure sodium light source that emits monochromatic light in which rays have virtually the same wavelength.

Material:- Quartz

Surface quality:

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: As specified over 90% aperture

Flatness face 2 on single sided polished flats: Commercial polish

Parallelism:

All our Optical Flats are fully inspected on their quality in our ISO 9001 certified, state-of-the-art Metrology laboratory. This allows us to work to the highest QA standards and meet the tolerance specifications on these precision components.

Contact our technical sales team to discover how Knight Optical’s high quality Optical Flats and superior service can improve your instrumentation and supply chain experience.

UK, Europe, Asia & RoW: E-Mail info@knightoptical.co.uk Tel +44 (0)1622 859444

USA & Canada: E-Mail usasales@knightoptical.com Tel +001 401-583-7846