A method to produce arbitrary axial fields of light by means of diffractive optical elements
In several areas of applied physics there is an interest in controlling the shape that a field of light takes as it propagates through space. The classical theory of diffraction allows the prediction of what happens to a wavefront when it passes through an element that obstructs it, something that is...
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| Tipo de recurso: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | México |
| Institución: | Centro de Investigación Científica y de Educación Superior de Ensenada |
| Repositorio: | Repositorio Institucional CICESE |
| Idioma: | inglés |
| OAI Identifier: | oai:cicese.repositorioinstitucional.mx:1007/3377 |
| Acceso en línea: | http://cicese.repositorioinstitucional.mx/jspui/handle/1007/3377 |
| Access Level: | acceso abierto |
| Palabra clave: | info:eu-repo/classification/Autor/Diffraction, diffractive optical elements, Fourier optics info:eu-repo/classification/Autor/Difracción, elementos ópticos difrangentes, óptica de Fourier info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/22 info:eu-repo/classification/cti/2209 info:eu-repo/classification/cti/220919 |
| Sumario: | In several areas of applied physics there is an interest in controlling the shape that a field of light takes as it propagates through space. The classical theory of diffraction allows the prediction of what happens to a wavefront when it passes through an element that obstructs it, something that is very useful to make “ drawings ” with light that can be projected on a single plane transverse to the propagation axis. Between contiguous planes, in contrast, the distribution of the light field varies according to the intrinsic properties of the wavefront, which limits its control. However, an adequate mathematical treatment of the interference produced along an axis by the effect of the diffraction of an azimuthally symmetric mask, allows the determination that there is furthermore a Fourier transformation relationship between the field distributions along the radii of the mask and the axis of propagation. It is a relationship that is not entirely evident in a first reading because the variables of the transformed pairs are linear in one domain and quadratic in the other, but with a bit of effort it is possible to manipulate them. In this work the arguments, the context, an interpretation and a set of experiments around this topic are discussed. |
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