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The active control of 30-m ring interferometric telescope (RIT) needs edge sensing and tip sensing when its primary mirr......
The precise alignment of a high-performance telescope is a key factor to ensure the imaging quality. However, for telesc......
Piston sensing via a dispersed fringe sensor with a merit-function-based active scanning algorithm a
Dispersed fringe sensors are a promising approach for sensing the large-scale physical step between adjacent segments wi......
A method for the design of an unobscured reflective zoom system with three mirrors is described. This method applies the......
The Ronchi grating is applied to measure the large-aperture aspheric surfaces in a quantitative way on the basis of self......
Method of evaluation of a mirror surface figure based on frequency domain and its application for th
We propose a sub-aperture stitching algorithm based on a frequency domain that can be denoted as a power spectral densit......
An angular trapezoidal phase mask used for a wideband coronagraph is proposed. The azimuthal phase of the mask is double......
Phase diversity (PD) is a kind of wavefront sensing technology based on image collecting and post-processing. We apply t......