Development of testing convex hyperbolic mirror using Hindle method based on stitching technology

摘要

The test method of Large-diameter convex secondary mirror in development process is the key to making largetelescope technology. Classical means HINDLE to test using of non - aberration points needs a spherical reflectingmirror which larger than the secondary mirror several times. This new Hindle test method based on stitchingtechnology can significantly reduce their standard mirror's size, drop the difficulty of processing and cut down thecosts. In This paper, the Hindle testing basic principles which base on stitching technology is introduced firstly, thenprinciple of stitching and least square method. Following the parameters of inside and outside standard mirrors arederived. Then translation and rotation transformation algorithm of different sub-aperture interferometer array data isgiven. Finally the preliminary results of the radial stitching experiments are given. The results showed that the relativeerror is RMS = 6.1%, PV = 5.11%. With improving and perfection, this method can be used in the E-ELT, CFGTconvex secondary mirror telescope test.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.