| 摘要 |
The wide-angle catoptric system with linear field for astronomical or space observation, comprising a first mirror (M1), a second mirror (M2), a third mirror (M3) and a fourth mirror (M4). It is characterized in that the first mirror is convex, the second mirror is concave and that the radii of curvature of the first (M1) and second (M2) mirrors are substantially equal. |
