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Optical Engineering

Design and characterization of an axicon structured lens
Author(s): Lifang Shi; Xiaochun Dong; Qiling Deng; Yueguang Lu; Yutang Ye; Chunlei Du
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Paper Abstract

An axicon structured lens is designed and its properties of long focal depth is demonstrated. The phase function of the axicon structured lens is constructed according to the properties of nondiffractive Bessel beam with uniform-intensity. Based on the relationship of the side length of the square hole and the phase retardation, the required phase distribution of the axicon structured lens with a long focal depth in a metallic film can be determined. To verify the feasibility of the method, an axicon structured lens with focal length 1000 mm, a focal depth larger than 20 mm was designed and the intensity distribution of far field was calculated. The results show that the focal depth is 25 mm which is nearly 7 times extended with nearly diffraction-limited image quality.

Paper Details

Date Published: 1 June 2011
PDF: 6 pages
Opt. Eng. 50(6) 063001 doi: 10.1117/1.3590723
Published in: Optical Engineering Volume 50, Issue 6
Show Author Affiliations
Lifang Shi, Institute of Optics and Electronics (China)
Xiaochun Dong, Institute of Optics and Electronics (China)
Qiling Deng, Institute of Optics and Electronics (China)
Yueguang Lu, Institute of Optics and Electronics (China)
Yutang Ye, Univ. of Electronic Science and Technology of China (China)
Chunlei Du, Institute of Optics and Electronics (China)

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