Abstract： The COS distribution of the diffracted optical field by a straight strap screen illuminated by cylin-drical waves is analysed. The super一diffraction limiting propagation property of COS beams is verifiedby compared with Gaussian beams. Its application is also discussed.
茹国云 赵道木. C O S 光 束 的 验 证 及 其 应 用 前景[J]. 浙江大学学报（理学版）, 1997, 24(1): 33-36.
Ru Guoyun Zhao Daomu. The Verification and Application of COS Beams. Journal of ZheJIang University(Science Edition), 1997, 24(1): 33-36.
