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Meniscus Positive Lenses

These lenses may be used to increase the numerical aperture of a positive lens assembly, without an undue increase in the aberrations.

More details

Materials: BK7

Specification for lenses (Cylindrical Lenses)

Material

 BK7 (Or Fused Silica)

Design Wavelength

 546.1nm (632.8 nm for Cylindrical lenses )

Design Index

 1.5183 ±0.0005 (1.5147 for Cylindrical lenses)

Flatness

 l/4@632.8nm (x

Diameter Tolerance

 +0.0, -0.15mm

Paraxial Focal Length

±2%

Center tolerance

 3 arc minutes

Clear Aperture

 >80%

Surface Quality

 60-40 scratch and dig

Bevel

 0.25 mm x 45°



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