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Chamfer: Protective as needed
Free aperture (%): 80
Free aperture CA (mm): 40.00
Diameter (mm): 50.00 +0.00/-0.20
Thickness (mm): 6.00 ±0.10
Edge: Fine Ground
Knoop hardness (kg/mm² ) : 522.00
Parallelism (arcseconds): <5
Poisson number: 0.16
Modulus of elasticity (GPa): 73
Optical properties
Abbe number (v d ): 67.8
Coating: Uncoated
Refractive index (n d ): 1,458
Substrate: Fused Silica (Corning 7980)
Surface quality: 20-10
Transmitted wavefront, PV: λ/10
Wavelength range (nm): 200 - 2200
