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Achromatic Cylinder Lenses are similar in design and used to a standard cylinder lens, but are with the added benefit of reducing the spherical and chromatic aberration at the image plane.
All different shapes and coatings are available of tailor-made from Visoptos.
Material: Optical Glass/Fused Silica
Size Range: 5-250mm
Dimension Tolerance: +/-0.02mm
Surface Quality: 20/10
Irregularity: 1/10 Lambda
Centering: <1 arcmin
Clear Aperture: >95%
Coating: AR, PR
http://www.visopto.net/