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See all 32 Products in Family

TECHSPEC 50.8mm Dia. λ/10 ZERODUR® Optical Flat

Stock #32-199-000
S$312.00
Qty 1-10
S$312.00
Qty 11
S$280.80
Qty 11+
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Surface Flatness:
λ/10
Abbe Number (vd):
56.2
Coating:
Uncoated
Coefficient of Thermal Expansion CTE (10-6/°C):
0.1
Diameter (mm):
50.80
Diameter (inches):
2.00
Diameter Tolerance (inches):
+0.0/-0.02
Thickness (inches):
0.50
Color:
Yellow Tint
Construction:
Single Surface
Density (g/cm3):
2.53
Index of Refraction nd:
1.542
Knoop Hardness (kg/mm2):
620.00
Parallelism (arcmin):
≤3
Poisson's Ratio:
0.24
Thickness (mm):
12.70
Substrate:
ZERODUR®
Surface Quality:
60-40
Thickness Tolerance (inches):
±0.06
Type:
Interferometry
Young's Modulus (GPa):
90.3

Regulatory Compliance

Reach 191:
RoHS 2015:

Product Family Description

  • Sizes Ranging from ½" Diameter to 12" 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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