Active Optics and Aberration Correction Technology for Sparse Aperture Segmented Mirrors

Active optics and aberration correction techniques for sparse aperture segmented mirrors are studied. A finite element model of the mirror was established, a multi-aperture polynomial derived. According to hard spot theorem, co-phase maintenance method based on change edge sensor position in conventional mode is And surface without participation proposed. The can correct aberrations surface, which caused by rigid body displacement along horizontal direction segments. This reduce RMS 2.2 nm. principle Warping Harness (WH) technique For problems tedious steps small number target aberrations, proposed directly mirrors, simple has wider range aberrations. Using this method, amplitude each stitched corrected below 10−4nm. It also verified that combining generalized ridge estimation differential evolution algorithm effectively solve quantity. Finally, it SiC material improve adaptability gravity load reducing mirror’s weight.