Europe, UK, Asia & RoW: [email protected] +44 (0)1622 859444 | USA & Canada: [email protected] +1 401-583-7846

My Cart
Currency

Looking For a Custom Optical Solution? Enquire

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. The rings present are called "Newton's rings" they are an interference pattern created by the reflection of light between two optical surfaces.

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.

Knight Optical offers a range of stock optical flats in single-sided Zerodur and Quartz, offering different stability and surface quality. Zerodur and quartz optical flats are also available in lambda/10 and lambda/20 from stock. Lamba/4, lambda/8 and lambda/16 flats are also available on short lead times.

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.

56 Items

Name Type Material Flatness Diameter (mm) Thickness (mm) Price Buy
TYZ7720 Single sided Zerodur Lambda/20 77 15
US$654.69
TYZ7710 Single sided Zerodur Lambda/10 77 15
US$522.64
TYZ5220 Single sided Zerodur Lambda/20 52 10
US$379.47
TYZ5210 Single sided Zerodur Lambda/10 52 10
US$273.83
TYZ30220 Single sided Zerodur Lambda/20 302 40
US$12,473.86
TYZ30210 Single sided Zerodur Lambda/10 302 40
US$9,845.37
TYZ2720 Single sided Zerodur Lambda/20 26 10
US$229.35
TYZ2710 Single sided Zerodur Lambda/10 26 10
US$177.92
TYZ2620 Single sided Zerodur Lambda/20 26 6
US$219.62
TYZ2610 Single sided Zerodur Lambda/10 26 6
US$166.80
TYZ25220 Single sided Zerodur Lambda/20 252 35
US$8,007.79
TYZ25210 Single sided Zerodur Lambda/10 252 35
US$5,929.74
TYZ20220 Single sided Zerodur Lambda/20 202 30
US$4,552.25
TYZ20210 Single sided Zerodur Lambda/10 202 30
US$3,586.20
TYZ15220 Single sided Zerodur Lambda/20 152 25
US$2,115.58
TYZ15210 Single sided Zerodur Lambda/10 152 25
US$1,830.63
TYZ12720 Single sided Zerodur Lambda/20 127 20
US$1,499.81
TYZ12710 Single sided Zerodur Lambda/10 127 20
US$1,316.33
TYZ10220 Single sided Zerodur Lambda/20 102 17
US$920.18
TYZ10210 Single sided Zerodur Lambda/10 102 17
US$856.24
TYQ7722 Double sided Fused quartz Lambda/20 77 15
US$376.69
TYQ7720 Single sided Fused quartz Lambda/20 77 15
US$301.63
TYQ7712 Double sided Fused quartz Lambda/10 77 15
US$315.53
TYQ7710 Single sided Fused quartz Lambda/10 77 15
US$269.66
TYQ5222 Double sided Fused quartz Lambda/20 52 10
US$254.37
TYQ5220 Single sided Fused quartz Lambda/20 52 10
US$215.45
TYQ5212 Double sided Fused quartz Lambda/10 52 10
US$208.50
TYQ5210 Single sided Fused quartz Lambda/10 52 10
US$177.92
TYQ30212 Double sided Fused quartz Lambda/10 302 40
US$5,364.01
TYQ30210 Single sided Fused quartz Lambda/10 302 40
US$5,038.75
TYQ2722 Double sided Fused quartz Lambda/20 26 10
US$200.16
TYQ2720 Single sided Fused quartz Lambda/20 26 10
US$162.63
TYQ2712 Double sided Fused quartz Lambda/10 26 10
US$162.63
TYQ2710 Single sided Fused quartz Lambda/10 26 10
US$130.66
TYQ2622 Double sided Fused quartz Lambda/20 26 6
US$193.21
TYQ2620 Single sided Fused quartz Lambda/20 26 6
US$154.29
TYQ2612 Double sided Fused quartz Lambda/10 26 6
US$154.29
TYQ2610 Single sided Fused quartz Lambda/10 26 6
US$126.49
TYQ25212 Double sided Fused quartz Lambda/10 252 35
US$3,333.22
TYQ25210 Single sided Fused quartz Lambda/10 252 35
US$2,775.83
TYQ20212 Double sided Fused quartz Lambda/10 202 30
US$2,328.25
TYQ20210 Single sided Fused quartz Lambda/10 202 30
US$1,946.00
TYQ15222 Double sided Fused quartz Lambda/20 152 25
US$1,082.81
TYQ15220 Single sided Fused quartz Lambda/20 152 25
US$874.31
TYQ15212 Double sided Fused quartz Lambda/10 152 25
US$859.02
TYQ15210 Single sided Fused quartz Lambda/10 152 25
US$690.83
TYQ12722 Double sided Fused quartz Lambda/20 127 20
US$758.94
TYQ12720 Single sided Fused quartz Lambda/20 127 20
US$612.99
TYQ12712 Double sided Fused quartz Lambda/10 127 20
US$528.20
TYQ12710 Single sided Fused quartz Lambda/10 127 20
US$464.26
TYQ10222 Double sided Fused quartz Lambda/20 102 17
US$483.72
TYQ10220 Single sided Fused quartz Lambda/20 102 17
US$415.61
TYQ10212 Double sided Fused quartz Lambda/10 102 17
US$429.51
TYQ10210 Single sided Fused quartz Lambda/10 102 17
US$350.28
TML4026 Standard bench top unit
US$1,112.00
TML4025 Standard bench top unit
US$938.25

56 Items

1

Optical Flats

Shop By
Shopping Options
Type
Material
Flatness
Diameter (mm)
Thickness (mm)
Price