A metrology system capable of cofocusing and cophasing is essential to ensure the performance of large segmented space telescopes, similar to that of monolithic telescopes, as well as to image the ...

In this paper, we propose to perform remote laser-induced fluorescence imaging for assessment of cultural heritage. The experiments are performed using the lidar system consist of frequency-tripled Nd ...

This is a small brass refracting telescope that had been used as a "finder" telescope mounted parallel to the tube of a Springfield Newtonian. The Springfield style of Newtonian reflector was first ...