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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

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

Stock #48-132
₹1,05,840.00 Other Coating Options
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Qty 1+
₹1,05,840.00
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Surface Flatness:
λ/20
Abbe Number (vd):
67.8
Clear Aperture CA (mm):
91.40
Coating:
Uncoated
Coefficient of Thermal Expansion CTE (10-6/°C):
0.52 (+5 to +35°C)
0.57 (0 to +200°C)
0.48 (-100 to +200°C)
Diameter (mm):
101.60 ±1.0
Diameter (inches):
4.00 ±0.04
Thickness (inches):
0.75 ±0.06
Construction:
Dual Surface
Density (g/cm3):
2.20
Index of Refraction nd:
1.458
Knoop Hardness (kg/mm2):
522
Parallelism (arcmin):
≤1
Poisson's Ratio:
0.16
Thickness (mm):
19.05 ±1.5
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Surface Quality:
60-40
Type:
Interferometry Window
Wavelength Range (nm):
200 - 2200
Young's Modulus (GPa):
73
Bevel:
Protective as needed

Regulatory Compliance

RoHS 2015:
Reach 197:

Product Description

λ/20 flats include a certificate of calibration.
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