UV optical flats
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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.
|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
|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.
|Flatness (Î»)||Thick |
|TYQ2620||Single sided||Fused quartz||Lambda/20||26||6||£110.00|
|TYQ7720||Single sided||Fused quartz||Lambda/20||76||15||£240.00|
|TYQ2720||Single sided||Fused quartz||Lambda/20||26||10||£115.00|
|TYQ15210||Single sided||Fused quartz||Lambda/10||152||25||£620.00|
|TYQ5220||Single sided||Fused quartz||Lambda/20||51||10||£184.00|
|TYQ2610||Single sided||Fused quartz||Lambda/10||26||6||£77.00|
|TYQ10220||Single sided||Fused quartz||Lambda/20||101||17||£330.00|
|TYQ15220||Single sided||Fused quartz||Lambda/20||152||25||£730.00|
|TYQ12710||Single sided||Fused quartz||Lambda/10||126||20||£400.00|
|TYQ30210||Single sided||Fused quartz||Lambda/10||302||40||£3,160.00|
|TYQ10210||Single sided||Fused quartz||Lambda/10||101||17||£280.00|
|TYQ12720||Single sided||Fused quartz||Lambda/20||126||20||£500.00|
|TYQ7710||Single sided||Fused quartz||Lambda/10||76||15||£200.00|
|TYQ2710||Single sided||Fused quartz||Lambda/10||26||10||£80.00|
|TYQ12712||Double sided||Fused quartz||Lambda/10||126||20||£480.00|
|TYQ5210||Single sided||Fused quartz||Lambda/10||51||10||£125.00|
|TYQ20210||Single sided||Fused quartz||202||Lambda/10||30||£1,220.00|
|TYQ25210||Single sided||Fused quartz||Lambda/10||252||35||£1,740.00|