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Proceedings Paper

Focal shift and astigmatism for a circular zone plate
Author(s): Shaomin Wang; Xiaoqing Jiang; Qiang Lin; Eusebio Bernabeu; Javier Alda; Victoria Martin
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Paper Abstract

Focal shift of the zone plate is completely different from the corresponding circular and annular apertures. Focal powers of the zone plate are constant under some conditions but for the latter they are always variables. Astigmatism for a zone plate is also investigated. The sagittal focal surfaces are unchanged but the tangential focal surfaces are changed as a function: cos2(Theta) , besides, it has neither spherical aberration nor coma. They are also completely different from conventional imaging devices.

Paper Details

Date Published: 11 May 1993
PDF: 7 pages
Proc. SPIE 1979, 1992 International Conference on Lasers and Optoelectronics, (11 May 1993); doi: 10.1117/12.144158
Show Author Affiliations
Shaomin Wang, Hangzhou Univ. (China)
Xiaoqing Jiang, Hangzhou Univ. (China)
Qiang Lin, Hangzhou Univ. (China)
Eusebio Bernabeu, Univ. Complutense de Madrid (Spain)
Javier Alda, Univ. Complutense de Madrid (Spain)
Victoria Martin, Univ. Complutense de Madrid (Spain)


Published in SPIE Proceedings Vol. 1979:
1992 International Conference on Lasers and Optoelectronics

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