Formulas are developed for the precise calculation of optimum stray-light baffles for Cassegrain optical systems, including systems having extreme optical curvatures such as those in infrared missile guidance systems. Minimum diffraction and maximum optical efficiency are the primary considerations.
W. LaVaughn Hales, "Optimum Cassegrain baffle systems," Appl. Opt. 31, 5341-5344 (1992)