Improving the Fresnel Zone Plate with the Traditional Technique of Optical Thin Film
Zhu Jingmin He Weiqiang Zhao Huandong
(Physics Depar tment of Hangzhou University , Hangzhou 310028)
Yin Hang
(Deqing Professio n High School, Deqing 313200)
Abstract：Using the theory of binary optics to improve the Fresnel zone plate , one can raise its diffraction efficiency greatly . This paper introduces the manufacture method of phase type Fresnel zone plate using the traditional technique of photog
rav ure and vacuum vaporization coating .The bases for the choo sing of film material and for the controling of the film thickness are pointed out .The diffractio n efficiency for tha t the phase step number is 2 was measured, that is equal to about 4 times of usual Fresnel zo ne plate .
朱精敏 何伟强 赵焕东 尹 行. 用传统光学薄膜技术改进菲涅耳波带板[J]. 浙江大学学报（理学版）, 1998, 25(1): 28-30.
Zhu Jingmin He Weiqiang Zhao Huandong Yin Hang. Improving the Fresnel Zone Plate with the Traditional Technique of Optical Thin Film. Journal of ZheJIang University(Science Edition), 1998, 25(1): 28-30.
