Research on Confocal and Co-Phasing Adjustments of Optical Mirrors by a Six-DOF Cross-Scale Piezoelectric Platform

Submirror splicing technology can avoid difficulties in manufacture and transportation of the integrated primary mirrors with large aperture, and achieve further breakthroughs in entire aperture, which has been widely applied in high-resolution space optical cameras. This study constructed a submirror splicing system based on a self-developed six-DOF cross-scale piezoelectric pose adjustment platform (PPAM) and proposed confocal and co-phasing pose adjustment strategies for adjusting the pose of the submirrors. Theoretical models for calculating splicing motion resolution were established, and optical confocal and co-phasing adjustment experiments were successfully accomplished, which demonstrated that the proposed pose adjustment strategies were feasible and the self-developed six-DOF cross-scale PPAM had the ability to adjust the pose of submirror and compensate external disturbance. Based on multi-DOF and cross-scale characteristics of the PPAM, submirror splicing tests were successfully performed to achieve cross-scale pose and precise phase adjustments of the image.