Mielenz K D
Appl Opt. 1974 Dec 1;13(12):2931-3. doi: 10.1364/AO.13.002931.
Ellipsoidal reflectors are useful for the 1:1 imaging of small objects without spherical and chromatic aberration. The magnitude of the off-axis aberrations of such reflectors is computed by application of Fermat's principle to the Hamiltonian point characteristic. The limiting form of the mirror aperture for which these aberrations do not exceed a set tolerance is an ellipse whose semiaxes depend on object size and angle of incidence.
椭球形反射镜对于小物体的1:1成像很有用，且不存在球面像差和色差。此类反射镜的离轴像差大小可通过将费马原理应用于哈密顿点特征来计算。这些像差不超过设定公差的反射镜孔径的极限形式是一个椭圆，其半轴取决于物体大小和入射角。
