Surface Flatness (P-V):

λ/10

Abbe Number (v_d):

56.2

Coating:

Uncoated

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

0.1

Diameter (mm):

50.80 +0.00/-1.00

Thickness (mm):

12.70 ±1.5

Diameter (inches):

2.00 +0.00/-0.04

Thickness (inches):

0.50 ±0.06

Clear Aperture CA (mm):

45.70

Color:

Yellow Tint

Construction:

Single Surface

Density (g/cm³):

2.53

Index of Refraction n_d:

1.542

Knoop Hardness (kg/mm²):

620

Parallelism (arcmin):

≤3

Poisson's Ratio:

0.24

Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More

ZERODUR^®

Surface Quality:

60-40

Type:

Interferometry Window

Young's Modulus (GPa):

90.3

Bevel:

Protective as needed

50.8mm Dia. λ/10 ZERODUR® Optical Flat