Effects of Stray Radiation Suppression Capability on Usable Field of View (FOV) for Ritchey-Chretien (R-C) Optical System

摘要

In this paper the relationship between stray light suppression baffle length and system performances such as focal length, FOV, obstruction ratio and so on was discussed based on geometrical optics. The relation formula was introduced. Moreover the function of baffle length to relative aperture of the system's primary mirror was studied. According to the formula educed in the paper the usable FOV of the system can be determined before aberration designing, thus the direction of choosing initial solutions of structure parameters was pointed out.