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Optical Engineering

Tunable focal depth of an apodized focusing optical system
Author(s): Xiumin Gao; Zhou Fei; Feng Zhang; Jintao Yang; Wendong Xu; Fuxi Gan
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Paper Abstract

The axial intensity distribution and focal depth of an apodized focusing optical system are theoretically investigated with two kinds of incident light fields: a uniform-intensity-distribution beam and a Gaussian beam. Both a low-numerical-aperture and a high-numerical-aperture optical system are considered. Numerical results show that the depth of focus can be adjusted by changing the geometrical parameters and transmissivity of the apodizer in the focusing optical system. When a Gaussian beam is employed as the incident beam, the waist width also affects the depth of focus. The tunable range of the focal depth is very considerable.

Paper Details

Date Published: 1 June 2005
PDF: 9 pages
Opt. Eng. 44(6) 063001 doi: 10.1117/1.1928282
Published in: Optical Engineering Volume 44, Issue 6
Show Author Affiliations
Xiumin Gao, Shanghai Institute of Optics and Fine Mechanics (China)
Zhou Fei, Shanghai Institute of Optics and Fine Mechanics (China)
Feng Zhang, Shanghai Institute of Optics and Fine Mechanics (China)
Jintao Yang, Shanghai Institute of Optics and Fine Mechanics (China)
Wendong Xu, Shanghai Institute of Optics and Fine Mechanics (China)
Fuxi Gan, Shanghai Institute of Optics and Fine Mechanics (China)


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