Acylinders - Precision at the highest level

Acylinders, also known as aspherical cylinders, denotes cylindrical-surface-shaped lenses, the cross-section of which differs from the circular shape. In practice, plano-concave and plano-convex cylinders are used as well as those with a spherical or aspherical reverse. In contrast to a lens, an aspheric cylindrical lens does not concentrate incident light into one focal point, but along a focal line without the influence of spherical aberrations.

  • Minimization of aberrations
  • Efficiency increase
  • Reduction of the total number of optical components
  • Reduction of the weight of optical systems

For more detailed specifications, our experienced experts will be happy to advise you.

Cylindrical lenses allow the creation of a line focus. By combining with a second acylinder an elliptical beam is generated. The stretching ratio is determined by the focal lengths of the two elements. The system shown represents a cylinder telescope.

Acylinders are used, for example, in lighting technology, such as the anamorphic technique, in surveying technology, e.g. for measuring rails in rail traffic, for inspection in the production of printed circuit boards and for waste sorting (separation of different plastics). Acylinder are also used in measuring equipment, in spectroscopy, in laser scanners and in the creation of marking patterns in medical technology. A setup with two crossed acylinders, for example, allowes the compensation of the asymmetrical outputs from laser diodes, producing a circular beam.

Further fields of application can be found here.

asphericon manufactures acylinders using specially developed CNC grinding and polishing techniques with a surface form deviation (RMSi) of ≤ 0.5 μm. Together with our customers, we design and manufacture the appropriate acylinder for their applications from a wide range of optical glasses, from prototypes to series production. The asphericon StockOptics acylinder product range offers an alternative to Custom projects. Here, you get a range of acylinders from 10 mm x 10 mm to 50 mm x 50 mm directly from stock. We would also be pleased to inform you about the possibilities of optical coatings for your cylinder optics.

asphericon manufactures according to RoHS and REACH regulations which is guaranteed by appropriate certificates.

Download RoHS Declaration

Download REACH Declaration


 Customized Acylinder*Stocked Acylinder
Diameterup to 200x9610x10 - 50x50 mm
RMS irregularities (RMSi)20 nm≤500 nm
Surface imperfections (Scratch/Dig)20 - 1060 - 40
Coatingcustomer specific4 standard-coatings
Laser damage thresholdcustomer specific12 J/cm², 100 Hz, 6 ns, 532 nm**
Measurement (optional)full-surface interferometricfull-surface interferometric
Materialscustomer specific (almost every type of glass, silica,   
germanium, silicon, IR lenses, zerodur)
Mountingcustomer-specificavailable for selected lenses
Delivery timefrom 3-4 weeksfrom 1 day
 Download Data SheetWebshop

*Best-fit-specifications | **100 Hz, 6ns, 532 nm

Custom Acylinder

asphericon manufactures acylinders based on your specifications and requirements. Our experienced team works together with you to develop customised cylindrical lenses in the following shapes: plano-convex, plano-concave, biconvex and biconcave. The outer shape can be freely defined.

Our experienced experts are always ready and willing to provide support for more detailed specifications.

Production capabilities

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StockOptics Acylinder

Visit our Webshop where you can conveniently order aspherical cylindrical lenses online. Here you can find an attractive selection of precision-polished a|Acylinders in various standard sizes. Benefit from high-precision acylinders (RMSi ≤ 0.5 µm) and a short delivery time.

StockOptics Catalog Europe 2023

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Acylinders in outstanding quality.

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