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All Products / Optics / Windows and Diffusers / Interferometry Windows / Single Surface Optical Flats
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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

254mm Dia. λ/20 ZERODUR® Optical Flat

Optical Flats 1 Optical Flats 3
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Stock #71-110-000 New 4 In Stock
Quantity Selector - Use the plus and minus buttons to adjust the quantity. +
€9.064,00
Volume Pricing
Qty 1-5 €9.064,00 each
Qty 6-25 €7.251,20 each
Qty 26-49 €6.888,64 each
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Prices shown are exclusive of VAT/local taxes
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Specifications

General

Type:
Interferometry Window

Physical & Mechanical Properties

Clear Aperture CA (mm):
228.60
Diameter (inches):
12.00 +0.00/-0.04
Diameter (mm):
254.00 +0.00/-1.00
Thickness (inches):
1.50 ±0.10
Thickness (mm):
38.10 ±2.5
Parallelism (arcmin):
≤3
Bevel:
Protective as needed
Construction:
Single Surface
Poisson's Ratio:
0.24
Young's Modulus (GPa):
90.3
Knoop Hardness (kg/mm2):
620.00

Optical Properties

Coating:
Uncoated
Color:
Yellow Tint
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
ZERODUR®
Index of Refraction (nd):
1.542
Surface Quality:
60-40
Abbe Number (vd):
56.2
Surface Flatness (P-V):
λ/20

Material Properties

Density (g/cm3):
2.53
Coefficient of Thermal Expansion CTE (10-6/°C):
0.1

Regulatory Compliance

Certificate of Conformance:
View
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Product Details

  • Sizes Ranging from ½" Diameter to 14" Diameter
  • Each λ/20 Flat 76.2mm and Larger Includes a Certificate of Calibration
  • Available with Standard Metallic Mirror Coatings: λ/10 and λ/20 Mirrors

TECHSPEC® Single Surface 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. TECHSPEC Single Surface Optical Flats ship in a durable storage case for permanent protection. λ/20 flats that are 76.2mm or larger also include a certificate of calibration.