caa a22 4500 606244174 CHVBK 20210128101328.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s12596-015-0271-8 doi (NATIONALLICENCE)springer-10.1007/s12596-015-0271-8 Arago-Poisson diffraction spot observed in the shadow area of an axicon lens [Elektronische Daten] [Guolu Ma, Guoying Zeng, Bin Zhao] In this paper we examined both theoretically and experimentally the diffraction field along the axis of propagation of the zero order Bessel distribution produced by an axicon. An axicon is typically used to obtain quasi non-diffracting beams. We found that an Arago-Poisson diffraction spot, normally only observed behind an opaque circular obstacle, can also be observed in the shadow area of an axicon lens. Both theoretical and experimental analysis indicate that the intensity distribution of the diffraction spot follows a zero order Bessel function in the paraxial region. The diffraction spot diameter increases linearly with the propagation distance in the shadow area while its energy decreases with propagation distance. The illuminated region and Arago-Poisson diffraction spot never overlap because the diameters of either increase linearly with propagation distance. Therefore, in theory, the Arago-Poisson diffraction spot could propagate to infinity. Our observation may be useful to produce an accurate straight line reference in commercial alignment systems. The Optical Society of India, 2015 Diffraction spot nationallicence Axicon nationallicence Non-diffracting beam nationallicence Shadow area nationallicence Ma Guolu Ministry of Education Key Laboratory of Testing Technology for Manufacturing Process, Southwest University of Science and Technology (SWUST), 621010, Mianyang, Sichuan Province, People's Republic of China aut Zeng Guoying Ministry of Education Key Laboratory of Testing Technology for Manufacturing Process, Southwest University of Science and Technology (SWUST), 621010, Mianyang, Sichuan Province, People's Republic of China aut Zhao Bin Department of Instrumentation, School of Mechanical Engineering, Huazhong University of Science and Technology (HUST), 430074, Wuhan, Hubei, People's Republic of China aut Journal of Optics Springer India 44/4(2015-12-01), 391-396 0972-8821 44:4<391 2015 44 12596 https://doi.org/10.1007/s12596-015-0271-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s12596-015-0271-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ma Guolu Ministry of Education Key Laboratory of Testing Technology for Manufacturing Process, Southwest University of Science and Technology (SWUST), 621010, Mianyang, Sichuan Province, People's Republic of China aut NATIONALLICENCE 700 1- Zeng Guoying Ministry of Education Key Laboratory of Testing Technology for Manufacturing Process, Southwest University of Science and Technology (SWUST), 621010, Mianyang, Sichuan Province, People's Republic of China aut NATIONALLICENCE 700 1- Zhao Bin Department of Instrumentation, School of Mechanical Engineering, Huazhong University of Science and Technology (HUST), 430074, Wuhan, Hubei, People's Republic of China aut NATIONALLICENCE 773 0- Journal of Optics Springer India 44/4(2015-12-01), 391-396 0972-8821 44:4<391 2015 44 12596