期刊
AMERICAN JOURNAL OF PHYSICS
卷 77, 期 3, 页码 229-236出版社
AMER ASSOC PHYSICS TEACHERS AMER INST PHYSICS
DOI: 10.1119/1.3033743
关键词
high-pass filters; laser beams; light diffraction; spatial filters
资金
- University of Hawaii at Manoa
We demonstrate a simple and straightforward method of producing Bessel beams using a 4-f spatial filtering system that requires no specialized optical components. The experiment employs the established technique of diffraction from a thin ring source, but the ring source is produced by the high-pass filtering of a uniformly illuminated circular aperture, yielding Bessel beams with a central spot radius of less than 35 mu m which persist over a distance of 160 mm. The experiment unifies diffraction theory, Fourier optics, and the properties of Bessel beams in a manner appropriate for an advanced undergraduate laboratory.
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