Abstract
With the advantages of large field of view, low cost and simple structure, the freeform optical system has extensive requirements in space exploration and other fields. However, the current machining methods for freeform are difficult to meet the requirements of optical use. Based on a developed fast servo tool (FTS) device, this paper proposes an error compensation turning method for freeforms. Firstly, the Zernike polynomial fitting method is used to reconstruct the freeform surface shape error obtained from off-line measurement, and the offset compensation is used to correct the tool path. Then, the compensation processing physical system is built to simulate the off-line compensation processing of the workpiece to verify the feasibility of compensation processing. Finally, the turning compensation processing of convex freeform aluminum mirror is carried out, and the surface accuracy of the workpiece meets the requirements of visible band. The research results have important practical significance for realizing the fast response machining of free-form surface mirror.
Funder
National Natural Science Foundation of China
Publisher
Public Library of Science (PLoS)
Reference21 articles.
1. Characterization of Surface Defects in Fast Tool Servo Machining of Microlens Array Using a Pattern Recognition and Analysis Method;F Cheung C;Measurement,2010
2. Characterizing the Shape of Freeform Optics;W Forbes G;Optics Express,2012
3. Development and fabrication of a hyperspectral, mirror based IR-telescope with ultra-precise manufacturing and mounting techniques for a snap-together system assembly, Sensors,;S Risse;Systems, and Next-Generation Satellites,2011
4. Taylor F, Carpenter B, Hacker J, et al, Geostationary Small Satellite for Operationally Responsive Space (ORS) Communications Missions, AIAA SPACE 2008 Conference & Exposition, 2008.
5. Coral reef atoll assessment in the South China Sea using Planet Dove satellites;P Asner G;Remote Sensing in Ecology & Conservation,2017