Start // Fiber Optics // Fiber Couplers / Collimators // Anamorphic beam-shaping optics

Anamorphic beam-shaping optics 5AN

Transforms a collimated laser beam with elliptical cross section into a circular beam or vice versa

Representative product images. Individual product images are found on the individual product pages.


Anamorphic optics act one-dimensionally on the elliptical profile of the colli­mated beam.
  • Radially symmetric output beam achieved by down scaling of the longer ­elliptical axis (beam-shaping factor 0.33 – 0.63)
  • Integrated astigmatism correction
  • No lateral beam shift or beam deviation as with anamorphic prism pairs
  • Various optics UV-IR
  • Clear aperture: 6.5 mm
  • Diffraction-limited optics pair
  • Ø 19.5 mm system mount: Full integration with ­­­multi­cubeTM system / 30 mm cage system, collimators and adapters


A circular beam profile may be preferred over the elliptical profile usually provided by laser diodes or by tapered amplifiers. Anamorphic optics act one-dimensionally on the elliptical profile of the colli­mated beam. They can be used to 

  • Adjust the larger beam diameter to the dimension of the smaller one, producing a radially symmetric beam 
  • Adjust the smaller beam diameter to the dimension of the larger one, producing a radially symmetric beam 
  • Transform a circular beam into an elliptical one 
  • Enlarge one elliptical axis to produce a beam with a higher axis ratio

The Anamorphic Beam-shaping ­Optics type 5AN are cylinder lens systems and, therefore, can be additionally used to correct the astigmatic difference ∆As of the laser diode or tapered amplifier through a refocusing of the optical system. Coupling efficiencies to single-mode fibers of 80% or more are possible when using anamorphic beam-shaping optics (depending on the beam characteristics of the laser diode or tapered amplifier).

Form Factor
The anamorphic effect is described by the form factor F, which ­indicates the relative diameter change of the parallel beam.
The target value is calculated from the ratio of the beam diameters Ø and Ø|| of the ­collimated beam.

Schema Anamorphot

Order Options

Order Code  Form FactorWavelength Range
5AN-1.6-050.63  600 nm - 1020 nm
5AN-2-350.5  390 nm -   620 nm
5AN-2-050.5  600 nm - 1020 nm
5AN-2-080.5  980 nm - 1550 nm
5AN-2.5-050.4  600 nm - 1020 nm
5AN-2.5-080.4  980 nm - 1550 nm
5AN-3-350.33  390 nm -   540 nm
5AN-3-050.33  600 nm - 1020 nm
5AN-3-080.33  980 nm - 1550 nm
5AN-3-190.331500 nm - 2100 nm


Article_AnamorphicOptics.pdf (Technote)

This downloads section only includes general downloads for the complete series.
Please access the individual product pages (using the product configurator, the product list, order options or the search button if you have a complete order code). Here you will find specific downloads including technical drawings or stepfiles.


Hex key WS 1.5
Eccentric key with a stroke of ± 1.0 mm.
Screwdriver WS 1.2
Adapter for 60SMS Laser Beam Couplers Outer diameter Ø 25/28 mm