以传统凯涅尔目镜为基础,采用ZEMAX软件,设计了衍射面位于目镜系统中不同位置时的折/衍混合目镜系统。所有系统均仅采用最普遍的K??9玻璃。设计结果与传统凯涅尔目镜的光学性能进行了分析和比较。结果表明折/衍混合目镜系统在校正目镜的像差,例如像散、垂轴色差、垂轴像差、轴向像差和轴向色差等方面优于传统的凯涅尔目镜。选择合适的衍射面位置,可以同时获得符合要求的畸变。衍射面的引入,极大地减小了系统的重量和尺寸。

Basing on the conventional Kellner eyepiece, four hybrid refractive|diffractive eyepieces with different locations of the diffractive surface are designed. Only a kind of glass K 9 is used in the optical systems. The optical performance of the hybrid eyepieces are studied and compared with the Kellner eyepiece. It has been shown that the hybrid eyepieces take the advantages of improving aberrations, such as astigmatic, lateral color, transverse aberration, longitudinal aberration and chromatic focal shift, as compared with the Kellner eyepiece, and a satisfactory distortion can be obtained if a suitable location of the diffractive surface is chosen. The size and the weight is greatly reduced due to the introducing of diffractive surface.