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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 18, Iss. 7 — Jul. 1, 2001
  • pp: 1465–1470

Rigorous electromagnetic analysis of a microcylindrical axilens with long focal depth and high transverse resolution

Bi-Zhen Dong, Juan Liu, Ben-Yuan Gu, Guo-Zhen Yang, and Jian Wang  »View Author Affiliations


JOSA A, Vol. 18, Issue 7, pp. 1465-1470 (2001)
http://dx.doi.org/10.1364/JOSAA.18.001465


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Abstract

We first present nonparaxial designs for a microcylindrical axilens with different long focal depths and rigorously analyze electromagnetic field distributions of the axilens using integral equations and the boundary-element method. Numerical results show that the designed axilenses indeed have the special feature of attaining a long focal depth while keeping high transverse resolution for numerical apertures of 2.4, 2.0, and 1.0. The ratio between the extended focal depth of the designed axilens and the focal depth of the conventional focal lens is 1.41, the corresponding maximal extended focal depth of the axilens can reach 28 μm, and the spot size of the focal beam is ∼10 μm over the focal range.

© 2001 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(050.1970) Diffraction and gratings : Diffractive optics
(220.3620) Optical design and fabrication : Lens system design

History
Original Manuscript: July 17, 2000
Revised Manuscript: January 2, 2001
Manuscript Accepted: January 2, 2001
Published: July 1, 2001

Citation
Bi-Zhen Dong, Juan Liu, Ben-Yuan Gu, Guo-Zhen Yang, and Jian Wang, "Rigorous electromagnetic analysis of a microcylindrical axilens with long focal depth and high transverse resolution," J. Opt. Soc. Am. A 18, 1465-1470 (2001)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-18-7-1465

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