Reflective shearing point diffraction interferometer

A novel point diffraction interferometer with reflective shearing optical structure is developed. The substrate of interferometer has an angle with optical axis, and the incident converging spherical wavefront will be reflected by the front and rear surfaces of the substrate, respectively. Then, an interferogram with carrier frequency is obtained. Using Fourier transform algorithm, the wavefront can be retrieved from one single interferogram. In this article, the intensity distribution formulas of interferogram are derived, and the system error and the major parameters of interferometer are also discussed. The new design with compact structure and high resolution is contrast adjustable and suitable for dynamic wavefront measurement. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2845–2848, 2015

[1]  Shou-huan Zhou,et al.  Circular common-path point diffraction interferometer. , 2012, Optics letters.

[2]  B. Vohnsen,et al.  Digital phase-shifting point diffraction interferometer. , 2014, Optics letters.

[3]  M Paturzo,et al.  Phase-shifting point-diffraction interferometer developed by using the electro-optic effect in ferroelectric crystals. , 2006, Optics letters.

[4]  Chen Chen,et al.  Point diffraction interferometer with adjustable fringe contrast for testing spherical surfaces. , 2011, Applied optics.

[5]  Mathieu Cohen,et al.  Wave-front reconstruction from multidirectional phase derivatives generated by multilateral shearing interferometers. , 2005, Optics letters.

[6]  W. Macy,et al.  Two-dimensional fringe-pattern analysis. , 1983, Applied optics.

[7]  Optical pressure sensor based on the combined system of a variable liquid lens and a point diffraction interferometer. , 2012, Applied optics.

[8]  O. Kwon,et al.  Multichannel phase-shifted interferometer. , 1984, Optics letters.

[9]  K Creath,et al.  Liquid-crystal point-diffraction interferometer. , 1994, Optics letters.

[10]  Baowu Zhang,et al.  Analysis of diffraction wavefront in visible-light point-diffraction interferometer. , 2013, Applied optics.

[11]  J. Wyant,et al.  Polarization phase-shifting point-diffraction interferometer. , 2006 .

[12]  Ming Lei,et al.  Parallel on-axis phase-shifting holographic phase microscopy based on reflective point-diffraction interferometer with long-term stability. , 2013, Applied optics.

[13]  Claudio Iemmi,et al.  Point diffraction interferometer with a liquid crystal monopixel. , 2013, Optics express.

[14]  Ming Kong,et al.  High-NA fiber point-diffraction interferometer for three-dimensional coordinate measurement. , 2014, Optics express.

[15]  F Roddier,et al.  Interferogram analysis using Fourier transform techniques. , 1987, Applied optics.