Surface measurement of axicon lens based on polarization phase-shifting interferometry

At a Glance

Metadata	Details
Publication Date	2018-11-06
Authors	Zhangfan Wei, Qiao Yuan, Aijun Zeng, Huijie Huang, Jingpei Hu
Institutions	Shanghai Institute of Optics and Fine Mechanics, University of Chinese Academy of Sciences
Citations	2

Abstract

Axicon is widely used in optical alignment and Bessel-Gauss beam generation. There are rigorous requirements for a highly accurate surface metrology. In this paper, a polarization phase-shifting interferometer measurement method using a concave axicon mirror is proposed to obtain the surface of axicon lens. The measuring beam produced by a polarization phase-shifting interferometer is incident on the flat surface of an axicon lens under test perpendicularly and it is reflected along the original optical path by a concave axicon mirror, which is easy to be manufactured by ultra-precision diamond-turning machine. The reflected beam by the concave axicon mirror interferes with the reflected reference beam by transmission flat (TF) in the interferometer. Consequently, the surface of the axicon lens can be obtained. The measurement method is simple, timesaving and easy to achieve surface metrology of axicon lens of any cone angle. In experiments, the evaluation parameters of the axicon surface profile errors are given by the peak-to-valley(PV) error and Root-Mean-Square(RMS) error. The measurement results verify that the measurement for axicon can be achieved by the proposed method which plays a crucial role in evaluating the manufacturing and image qualities of axicon.

Tech Support

Original Source

DOI: https://doi.org/10.1117/12.2501224

References

2011 - Annular ring zoom system using two positive axicons
2006 - Characteristic analysis of a refractive axicon system for optical trepanning
2011 - Systematic analysis of the measurement of cone angles using high line density computer-generated holograms