Plano concave Lenses

Plano concave Lenses have one concave surface. It has negative focal length. It
is often used to expand light or to increase focal length in existing systems.
Plano-Concave Lens Specifications:
Material: BK7, Fused Silica, SF10, CaF2, Sapphire .etc.
Paraxial Focal Length Tolerance: ±2%
Dimension Tolerance: ±0.2(General). ±0.05(High Precision)
Centration: <3 arc min
IRR: λ/4@633nm（General),λ/10@633nm(High Precision)
Clear Aperture: >80%(Small Size), >95%(Large Size)
Surface Figure <1.5λ@633nm（General),<λ/4@633nm(High Precision)
Surface Quality: 60/40（General),10/5(High Precision)
Bevel: <0.25mm
Coating: Uncoated, AR,PR, HR, etc.

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