Journal ArticleDOI
Focal shift and focal switch of partially coherent light in dual-focus systems
Xiaoyun Liu,Jixiong Pu +1 more
TLDR
In this article, the authors investigated the influence of the spatial coherence on the focal shift of the Fresnel zone plate and showed that focal shift is not only dependent upon the number of Fresnel numbers of the focusing system, but also on the spatial coherentness of the incident partially coherent light.About:
This article is published in Optics Communications.The article was published on 2005-08-15. It has received 20 citations till now. The article focuses on the topics: Fresnel number & Fresnel zone.read more
Citations
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Journal ArticleDOI
Focusing of spatially inhomogeneous partially coherent, partially polarized electromagnetic fields.
Matthew R. Foreman,Peter Török +1 more
TL;DR: It is found that the effective degree of spectral coherence of an electromagnetic beam is unchanged upon focusing and the assumption of harmonic angular dependence allows the azimuthal integration to be performed analytically, providing further simplification of the analysis.
Journal ArticleDOI
Experimental observation of focal shifts in focused partially coherent beams
TL;DR: In this paper, the experimental observation of focal shifts in partially coherent beams of Gaussian Schell-model (GSM) type focused by a circularly apertured thin lens was reported.
Journal ArticleDOI
Focal shift of hollow Gaussian beams through a thin lens
TL;DR: In this paper, the location of the axial maximum intensity of hollow Gaussian beams passing through a thin lens is derived. And the relative focal shift and the relative location of axial maximal intensity of the HGBs are investigated.
Journal ArticleDOI
Degree of paraxiality of a partially coherent field.
TL;DR: The dependence of the degree of paraxiality on the size and the state of coherence of the source as well as on the truncation parameter and the magnitude of twist phase is analyzed by a number of numerical examples.
Journal ArticleDOI
Effective Fresnel number and the focal shifts of focused partially coherent beams.
Meimei Dong,Jixiong Pu +1 more
TL;DR: The results indicate that the relative focal shift can be evaluated by an analytical formulation, which is expressed as a function of the effective Fresnel number, and the method can simply and exactly evaluate the focal shifts.
References
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Principles of Optics
TL;DR: In this article, the authors discuss various topics about optics, such as geometrical theories, image forming instruments, and optics of metals and crystals, including interference, interferometers, and diffraction.
Journal ArticleDOI
Random Phasing of High-Power Lasers for Uniform Target Acceleration and Plasma-Instability Suppression
Yoshiaki Kato,Kunioki Mima,Noriaki Miyanaga,S. Arinaga,Yoneyoshi Kitagawa,Masahiro Nakatsuka,Chihiro Yamanaka +6 more
TL;DR: In this article, Planar as well as spherical targets were irradiated for the first time by the random-phased wave and the targets were uniformly accelerated without being affected by small-scale intensity nonuniformities.
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Focal shifts in diffracted converging spherical waves
TL;DR: In this paper, it was shown that when the incident wave is uniform and the angular semi-aperture is small, the ratio of the point of maximum intensity to the distance between the geometrical focus and the plane of the aperture depends only on the Fresnel number N of the image when viewed from the focal point.
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Parametric study of apertured focused gaussian beams.
TL;DR: Using Fresnel diffraction integrals, calculations have been made of the irradiance and power distributions in the near field and in the vicinity of the focus for Gaussian beams focused through annular apertures for very large focal length infrared systems.
Journal ArticleDOI
Focal switch: a new effect in low-Fresnel-number systems.
TL;DR: It is shown for the first time, that when a spherical wave illuminates a certain type of diffracting screen, in addition to the expected focal-shift effect, depending on the value of the Fresnel number of the focusing system, a focal switch effect can appear.
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A diffraction beam field expressed as the superposition of Gaussian beams
J. J. Wen,M. A. Breazeale +1 more