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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 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 with tolerances of +/-0.25mm on dimensions.

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.

Material:
Surface finish:
Flatness face 1 & 2 on dual face polished flats:
Flatness face 1 on single sided polished flats:
Flatness face 2 on single sided polished flats:
Parallelism:
Diameter:
Thickness:
Quartz
<5 angstrom off pitch
As specified over 90% aperture
As specified over 90% aperture
Commercial polish
<5 arcmin (or better if required)
+/-2mm
+/-1mm

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.

34 Items

Name Type Material Flatness Diameter (mm) Thickness (mm) Price Buy
TYQ7722 Double sided Fused quartz Lambda/20 76 15
$430.90
TYQ7720 Single sided Fused quartz Lambda/20 76 15
$333.60
TYQ7712 Double sided Fused quartz Lambda/10 76 15
$333.60
TYQ7710 Single sided Fused quartz Lambda/10 76 15
$278.00
TYQ5222 Double sided Fused quartz Lambda/20 51 10
$319.70
TYQ5220 Single sided Fused quartz Lambda/20 51 10
$255.76
TYQ5212 Double sided Fused quartz Lambda/10 51 10
$236.30
TYQ5210 Single sided Fused quartz Lambda/10 51 10
$173.75
TYQ30212 Double sided Fused quartz Lambda/10 302 40
$5,699.00
TYQ30210 Single sided Fused quartz Lambda/10 302 40
$4,392.40
TYQ2722 Double sided Fused quartz Lambda/20 26 10
$250.20
TYQ2720 Single sided Fused quartz Lambda/20 26 10
$159.85
TYQ2712 Double sided Fused quartz Lambda/10 26 10
$173.75
TYQ2710 Single sided Fused quartz Lambda/10 26 10
$111.20
TYQ2622 Double sided Fused quartz Lambda/20 26 6
$243.25
TYQ2620 Single sided Fused quartz Lambda/20 26 6
$152.90
TYQ2612 Double sided Fused quartz Lambda/10 26 6
$166.80
TYQ2610 Single sided Fused quartz Lambda/10 26 6
$107.03
TYQ25212 Double sided Fused quartz Lambda/10 252 35
$2,905.10
TYQ25210 Single sided Fused quartz Lambda/10 252 35
$2,418.60
TYQ20212 Double sided Fused quartz Lambda/10 202 30
$2,029.40
TYQ20210 Single sided Fused quartz Lambda/10 202 30
$1,695.80
TYQ15222 Double sided Fused quartz Lambda/20 152 25
$1,376.10
TYQ15220 Single sided Fused quartz Lambda/20 152 25
$1,014.70
TYQ15212 Double sided Fused quartz Lambda/10 152 25
$1,167.60
TYQ15210 Single sided Fused quartz Lambda/10 152 25
$861.80
TYQ12722 Double sided Fused quartz Lambda/20 126 20
$911.84
TYQ12720 Single sided Fused quartz Lambda/20 126 20
$695.00
TYQ12712 Double sided Fused quartz Lambda/10 126 20
$667.20
TYQ12710 Single sided Fused quartz Lambda/10 126 20
$556.00
TYQ10222 Double sided Fused quartz Lambda/20 101 17
$583.80
TYQ10220 Single sided Fused quartz Lambda/20 101 17
$458.70
TYQ10212 Double sided Fused quartz Lambda/10 101 17
$486.50
TYQ10210 Single sided Fused quartz Lambda/10 101 17
$389.20

34 Items

1

Quartz Optical Flats

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