Fast and wide field off-axis three-mirror optical system design with curved detector for planetary exploration

Planetary exploration missions generally impose high demands on both the imaging quality and the size-weight constraints of optical systems. Therefore, this paper proposes using curved detector in the design of a fast and wide-field off-axis freeform three-mirror optical system, aiming to achieve high imaging performance within a relatively small volume. Specifically, a freeform-shaped curved detector is considered in the off-axis system design, which ultimately enables the system reach a near diffraction limited image quality within 10-liter volume. The proposed design shows great potential for application in planetary exploration missions, making the higher performance imaging instruments feasible in the future missions.