Diffraction property of an axicon in quasi-monochromatic light
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School of Mechanical Science and Engineering, Huazhong University of Science & Technology, Wuhan 430074, China
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Corresponding author:
ZHAI Zhong-sheng, zhaobin63@sohu.com
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Received Date:
2007-03-20
Accepted Date:
2007-05-13
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Abstract
For analyzing the diffraction property of an axicon in quasi-monochromatic illumination,based on the analyses of the diffraction property of an axicon illuminated by a monochromatic plane wave and the property of quasi-monochromatic light that it can be regarded as superposition of monochromatic components of differential frequencies,the intensity distribution of the diffraction pattern of an axicon in quasi-monochromatic light was deduced.According to the numerical simulation and experimental results,the difference between the diffraction patterns generated by quasi-monochromatic light and monochromatic light was compared.Results show that the intensity distribution of an axicon in quasi-monochromatic light is given by the sum of intensity of individual component,and the diffraction fringes are less than those produced by monochromatic light.Moreover the off-axis intensity attenuates more rapidly than that of monochromatic waves.
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