Localized gradient-index field reconstruction using background-oriented schlieren.

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ID: 64391
2019
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Abstract
A method to reconstruct a localized gradient-index field using the background-oriented schlieren (BOS) technique is proposed here. The BOS technique can measure deflection angles of light rays passing through the gradient-index field. When a gradient-index field is localized in a limited area, a scalar potential that is the integral of the gradient-index field over the light ray path can be transformed in the form of the integral of the deflection angle over the localized area. The gradient-index field is then derived from the scalar potential assuming that the field is axisymmetric. When the gradient-index is anisotropic, a light ray path depends on its polarization. The localized reconstruction method is applicable not only to the isotropic gradient-index field but also to such anisotropic field. An anisotropic gradient-index field can be experimentally generated by applying stress to a glass block with a resin sphere that contacts the glass block at a point. The anisotropic gradient-index field can be reconstructed using the localized reconstruction method, and it agrees with that of theoretical calculation using structural analysis software.
Reference Key
ohno2019localizedapplied Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Ohno, Hiroshi;Toya, Kiminori;
Journal Applied optics
Year 2019
DOI
10.1364/AO.58.007795
URL
Keywords
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