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Bi-Convex Spherical BK7A

Bi-Convex Spherical BK7A
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*   Bi-convex lenses
   Finite conjugate imaging
   Focusing or optical imaging

Focal Length:    

 
n: refractive index
R: radius curvature
 
Specifications:
Material:
Surface Flatness:
Surface Quality:
Centration Error:
Focal Length Tolerance:
Diameter Tolerance:
Thickness Tolerance:
Clear Aperture:
BK7A or UV Fused Silica
< λ/10 @ 633nm
< 10/5 (both sides)
≤ 3 arcmin
< ± 0.5%
< + 0.00 / - 0.20
< ± 0.25mm
≥ 85% of diameter