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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. 19, Iss. 10 — Oct. 1, 2002
  • pp: 2030–2035

Analysis of a closed-boundary axilens with long focal depth and high transverse resolution based on rigorous electromagnetic theory

Jia-Sheng Ye, Bi-Zhen Dong, Ben-Yuan Gu, Guo-Zhen Yang, and Shu-Tian Liu  »View Author Affiliations


JOSA A, Vol. 19, Issue 10, pp. 2030-2035 (2002)
http://dx.doi.org/10.1364/JOSAA.19.002030


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Abstract

We find that a microcylindrical axilens with a closed boundary and with an <i>f</i>-number less than 1 still can achieve the properties of long focal depth and high transverse resolution, unlike a microcylindrical axilens with an open boundary, which fails to maintain those properties for low <i>f</i>-numbers. The focusing characteristics of the closed-boundary axilens and the open-boundary axilens are numerically investigated based on the boundary integral method. The numerical results show that the ratio of the extended focal depth of the closed-boundary axilens to the focal depth of the conventional microlens can reach up to 1.26 and 2.12 for the preset focal depths 3 and 5 μm, respectively, even though the <i>f</i>-number is reduced to 1/3.

© 2002 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(050.1970) Diffraction and gratings : Diffractive optics
(220.0220) Optical design and fabrication : Optical design and fabrication

Citation
Jia-Sheng Ye, Bi-Zhen Dong, Ben-Yuan Gu, Guo-Zhen Yang, and Shu-Tian Liu, "Analysis of a closed-boundary axilens with long focal depth and high transverse resolution based on rigorous electromagnetic theory," J. Opt. Soc. Am. A 19, 2030-2035 (2002)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-19-10-2030

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