BK7 windows

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Attribute Specification
Material H-K9L/BK7
Index of Refraction nd: 1.516
Abbe Number (vd): 64.17
Density (g/cm3): 2.51
Coefficient of Thermal Expansion CTE (10-6/°C): 7.1
Knoop Hardness (GPa): 610
Young's Modulus (GPa): 82
Poisson's Ratio: 0.206
Diameter (Φmm) 1.0~400.00
Thickness (mm) ≥0.1
Diameter Tolerance (mm) ±0.05
Thickness Tolerance (mm) ±0.02
Clear Aperture >95%
Parallelism 10 sec.
Surface Quality 80/50~10/5
Flatness (per 25mm@633nm) 1λ~λ/10@any 25.4mm area
Bevel (face width x 45°) <0.25mm

We have lots of BK7 windows in our stock and pls check with our sales for details.

Stocking List

BK7 windows Ø1.5*0.5mm

BK7 window Ø6*2mm

BK7 windows Ø9*3mm

BK7 windows Ø10.5*0.5mm

BK7 window Ø15.7*1.016mm

BK7 windows Ø16*1mm

BK7 window Ø19.05*1.5m BK7 windows Ø20*1mm

BK7 window Ø25.4*3.175mm

BK7 windows Ø30*3mm

BK7 windowØ35.05*2.032mm

BK7 window Ø40*2mm

BK7 window Ø50.8*3.15mm

BK7 window Ø49*2.5m

BK7 windows Ø57*6mm

BK7 window Ø63.05*6.35mm

BK7 windows Ø75*4mm

BK7 window Ø80*3mm

BK7 window Ø100*20mm

BK7 windowØ115.14*3.15mm

BK7 window Ø120*25m

BK7 windows Ø150*6mm

BK7 window Ø250*5mm

BK7 windows 280*280*4mm

BK7 window 15*15*1mm

BK7 window 48*46*4mm

BK7 window 87*27*1mm

BK7 window 120*20*30