Abstract
Azimuthal Walsh filters derived from azimuthal Walsh functions can be used as pupil filters for manipulating far-field diffraction characteristics of optical imaging systems. These asymmetric filters open up new possibilities for wavefront engineering. Azimuthal Walsh functions form a closed set of normal orthogonal functions defined over the interval (0, 2π), and have values +1 or −1 within the interval. This chapter reports the diffraction characteristics of azimuthal Walsh filters placed on the exit pupil of an axially symmetric optical system to produce exotic 2D and 3D beam of light on the far-field plane.
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Bhattacharya, I., Hazra, L. (2020). Transverse Intensity Distribution on the Far-Field Plane of Azimuthal Walsh Filters. In: Azimuthal Walsh Filters. Progress in Optical Science and Photonics, vol 10. Springer, Singapore. https://doi.org/10.1007/978-981-15-6099-6_2
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DOI: https://doi.org/10.1007/978-981-15-6099-6_2
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