Focal shifts of flattened Gaussian beams passing through an aperture-lens separation system
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College of Physics and Electronic Information, Luoyang Normal University, Luoyang 471000, China;
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2.
College of Physics and Information Engineering, Henan Normal University, Xinxiang 453007, China
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Corresponding author:
PAN Liu-zhan, panliuzhan@263.net
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Received Date:
2008-10-20
Accepted Date:
2008-11-29
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Abstract
In order to study the axial intensity distribution and focal shifts of flattened Gaussian beams(FGBs) passing through an aperture-lens separation system in detail,each parameter affecting the axial optical intensity distribution and focal shift were analyzed through numerical calculation based on Collins formula.It's indicated that the axial intensity distribution and focal shift are not only determined by FGBs orders N and Fresnel number Fw, but also effected by Fresnel number Fa of the aperture and aperture-lens distance s.
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Proportional views
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