Abstract
A full-field surface shape measurement method synthesizing a surface measurement method and a point measurement method is proposed in order to capture a surface shape of a large space structure with high accuracy and spatial resolution. The proposed method reconstructs the full-field surface shape of the large space structures by connecting the partial surface shape data measured with the surface measurement. The connection is performed by the coordinate transformation of the partial surface shape data onto the reference frame. The coordinate transformation matrix is determined by the point measurement as calibration. The equation to derive the coordinate transformation matrix is formulated, and an actual surface shape measurement system synthesizing the photogrammetric measurement system using the grating projection method and the laser tracker measurement system is constructed based on the formula. By conducting a surface shape measurement for the spherical mirror model, it is shown that the constructed measurement system can measure the surface shape of the spherical mirror model with 0.05×10−3 mRMS accuracy and can connect the partial surface shape data with the same accuracy of the grating projection method, while confirming the feasibility of the proposed method.
