Abstract Details

Name: Vineeth Valsan
Affiliation: Indian Institute of Astrophysics
Conference ID: ASI2017_554
Title : Develpoment of 2D profilometer stitching algorithm
Authors and Co-Authors : S. Sriram; N. K. Mishra; A. Basheer; P. K. Mahesh; J. P. Lancelot; G. C Anupama. (Affiliation: IIA, Bangalore)
Abstract Type : Poster
Abstract Category : Instrumentation and Techniques
Abstract : A stiching algorithm is developed for the "D profilometer used for Stressed Mirror Polishing of TMT primary mirror segments. This profilometer consists of 61 probes which collects the surface profile data using contact method. A total of 183 data points are taken by clocking the profilometer thrice. This data is then stitched using the algorithm to reconstruct the profile which is then broken down to different Zernike terms. The algorithm is initially validated analytically as well as using finite element analysis. The actual measured data from a known surface is also used to verify the stitching accuracy of the algorithm. The output of this algorithm gives the Zernike coefficients of the surface.