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Generation of Nearly Diffraction-Free Beams Using a New Optical System |
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| Authors: | Keizo Kono Mitsuru Irie Takumi Minemoto |
| Institution: | (1) Division of System Science, The Graduate School of Science and Technology, Kobe University Rokkodai-cyo, Nada-ku, Kobe 657, Japan;(2) Imaging Systems Laboratory, Mitsubishi Electric Corp. Babazusyo, Nagaokakyo-shi, Kyoto 617, Japan |
| Abstract: | A new optical system which can efficiently generate the nearly diffraction-free beams is proposed and its characteristics are investigated by numerical analysis. This optical system consists of a new optical element called a DCC (double-concave-cone) lens and an objective lens with a large numerical aperture, and can generate the Bessel beam and also the Bessel-Gauss beam. The maximum propagation distance of nearly diffraction-free beams generated by the system agrees with its theoretical value for the Bessel beam. |
| Keywords: | diffraction-free beam non diffracting beam Bessel beam Bessel-Gauss beam double-concave-cone lens super resolution |
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