【摘要】 分析指出,若满足一定的近似条件,离轴抛物镜存在一倾斜的最佳子午像面。文中导出了这一像面的倾角和其上子午弥散大小。理论分析和实际计算结果均表明,此像面上子午像质得到显著提高。更多还原

【Abstract】 Analysis is made for the meridional imaging rays of a not-far-off-axis paraboloidal mirror, which indicates that there is an inclined optimum image plane of the off-axis mirror if certain approximation is satisfied and the aperture stop is properly located. The inclination and the blurred point image size on the image plane are derived. The analysis and the ray tracing result both show that the image quality is much improved on the inclined image plane.更多还原