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76.2mm Dia. λ/10 Fused Silica Optical Flat

Stock #01-915-000
A$520.00
Qty 1-10
A$520.00
Qty 11-25
A$468.00
Qty 26+
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Surface Flatness:
λ/10
Abbe Number (vd):
67.7
Coating:
Uncoated
Coefficient of Thermal Expansion CTE (10-6/°C):
0.55
Diameter (mm):
76.20
Diameter (inches):
3.00
Diameter Tolerance (inches):
+0.0/-0.02
Thickness (inches):
0.75
Color:
Clear
Construction:
Single Surface
Density (g/cm3):
2.2
Index of Refraction nd:
1.458
Knoop Hardness (kg/mm2):
522.00
Parallelism (arcmin):
≤3
Poisson's Ratio:
0.16
Thickness (mm):
19.05
Substrate:
Fused Silica
Surface Quality:
60-40
Thickness Tolerance (inches):
±0.06
Type:
Interferometry
Wavelength Range (nm):
200 - 2200
Young's Modulus (GPa):
72.7
RoHS:

Product Family Description

  • Sizes Ranging from ½" Diameter to 8" Diameter
  • Each λ/20 Flat 75mm and Larger Includes a Certificate of Calibration
  • Available with Standard Metallic Mirror Coatings: λ/10 and λ/20 Mirrors

Optical Flats are used as a reference (test plate) against which the flatness of an unknown surface may be compared. Each piece is precision polished by our master opticians and tested on a Zygo interferometer to insure the surface flatness. The secondary surfaces of our single surface flats are pitch polished to window quality for viewing the interference pattern. Each flat ships in a durable storage case for permanent protection. λ/20 flats that are 75mm or larger also include a certificate of calibration.

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