Alternatively, axicons are called conical prisms. Figure 1: Ray tracing simulation for an axicon with parallel incident light.Īxicons may be considered as specialty lenses ( conical lenses) after all, their outer shape and the typical way of mounting is similar as for lenses. For monochromatic light, for example, one of course obtains interference effects, creating a ring structure, in the region where the different contributions of reflected light overlap. Refraction thus leads to a constant ray deflection angle within a range of input ray positions.įigure 1 shows a ray tracing simulation for an axicon with parallel incident light. The inclination angle of the surface (called the axicon angle) does not change with increasing distance from the optical axis, while it would continuously change for an ordinary lens. In most cases, the transverse cross-section is a circle, as for an ordinary lens. Generally, one side is conical, with the tip looking outwards, and the other surface is flat ( plano-convex axicon).
How to cite the article suggest additional literatureĪn axicon (also called axicon lens) is an optical device similar to a lens, where however one has a conical rather than curved surface.
Definition: lenses with a conical surface
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