Engineering an achromatic Bessel beam using a phase-only spatial light modulator and an iterative Fourier transformation algorithm

OPTICS COMMUNICATIONS

卷:383

Article

Walde, Marie¹  Jost, Aurelie¹  Wicker, Kai^1,2,3  Heintzmann, Rainer^1,3 

[1] Friedrich Schiller Univ, Abbe Ctr Photon, IPC, Jena, Germany

[2] Corp Res & Technol, Carl Zeiss AG, Jena, Germany

[3] Leibniz Inst Photon Technol IPHT, Jena, Germany

关键词: Bessel beam;    Spatial light modulator;    Non-diffracting beams;    Iterative Fourier transform algorithm;    Frequency filtering;   

DOI  :  10.1016/j.optcom.2016.08.050

来源: Elsevier

【 摘 要 】

Bessel illumination is an established method in optical imaging and manipulation to achieve an extended depth of field without compromising the lateral resolution. When broadband or multicolour imaging is required, wavelength-dependent changes in the radial profile of the Bessel illumination can complicate further image processing and analysis. We present a solution for engineering a multicolour Bessel beam that is easy to implement and promises to be particularly useful for broadband imaging applications. A phase-only spatial light modulator (SLM) in the image plane and an iterative Fourier Transformation algorithm (IFTA) are used to create an annular light distribution in the back focal plane of a lens. The 2D Fourier transformation of such a light ring yields a Bessel beam with a constant radial profile for different wavelength. (C) 2016 The Authors. Published by Elsevier B.V.

【 授权许可】

Free