کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
739688 | 894112 | 2010 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of astigmatism on the phase singularities of focused beams
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The effect of astigmatism on the phase singularities of focused beams The effect of astigmatism on the phase singularities of focused beams](/preview/png/739688.png)
چکیده انگلیسی
The phase singularities of plane beams focused by an aperture lens with astigmatism are studied. Numerical calculation results are given to illustrate the dependence of phase singularities of focused plane beams on the astigmatic coefficient and the Fresnel number. It is shown that as the Fresnel number gradually increases, the phase singularities shift not only towards the z-axis but also towards the geometrical focal plane in the presence of astigmatism, whereas the phase singularities move along the focal plane and always line in the focal plane for the astigmatism-free case. With increasing astigmatic coefficient, the phase singularities shift not only towards the z-axis but also far away from the geometrical focal plane.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics & Laser Technology - Volume 42, Issue 3, April 2010, Pages 484–488
Journal: Optics & Laser Technology - Volume 42, Issue 3, April 2010, Pages 484–488
نویسندگان
Yongtao Zhang, Liuzhan Pan,