1" Dia. λ/20 Fused Silica Dual Surface Flat

Surface Flatness:

λ/20

Abbe Number (v_d):

67.8

Clear Aperture CA (mm):

22.86

Coating:

Uncoated

Coefficient of Thermal Expansion CTE (10^-6/°C):

0.52

Diameter (mm):

25.40 ±1.0

Diameter (inches):

1.00 ±0.04

Thickness (inches):

0.50 ±0.06

Construction:

Dual Surface

Density (g/cm³):

2.2

Index of Refraction n_d:

1.458

Parallelism (arcsec):

30.00

Poisson's Ratio:

0.16

Thickness (mm):

12.70 ±1.5

Substrate:

Fused Silica (Corning 7980)

Surface Quality:

60-40

Type:

Interferometry

Wavelength Range (nm):

200 - 2200

Young's Modulus (GPa):

Regulatory Compliance

RoHS 2015:

Compliant

Reach 209:

Compliant

Product Family Description

λ/10 and λ/20 Surface Flatness Options
Each λ/20 Flat 76.2mm and Larger Includes a Certificate of Calibration
Extended Lifetime in Contact Measurement Applications
Single Surface Optical Flats Also Available

Our Precision Dual Surface Optical Flats are precision ground and polished to the stated accuracies on both surfaces so that either face may be used for test applications. Both surfaces are tested and certified by our Zygo Interferometer. Each flat ships in a durable storage case for permanent protection. λ/20 flats that are 76.2mm or larger also include a certificate of calibration.

1" Dia. λ/20 Fused Silica Dual Surface Flat

Regulatory Compliance

Product Family Description

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