Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Conference Papers Conference Paper Faculty Publications- Conference Papers Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Sensitivity and tolerance analysis of 2D Profilometer for TMT primary mirror segments Subject The topic of the resource Large optics; Optical Profilometry; Thirty Meter Telescope Description An account of the resource The primary mirror (M1) of Thirty Meter Telescope (TMT) consists of 492 segments of which, 86 are ground and polished by India-TMT. These segments are off-Axis and aspheric in nature and one of the effective methods to polish such segments is through Stressed Mirror Polishing (SMP). During SMP, consistent in-situ metrology of the surface is needed to achieve the required profile. A 2D Profilometer (2DP) will be used by India-TMT for the low frequency profile metrology. The 2DP is a contact-Approach metrology, consisting of probes positioned in a spiral pattern, measuring the sag of segment surface. Initial section of this paper deals with the sensitivity and tolerance analysis of the 2DP. This is followed by the study on position and rotational errors of the 2DP as a whole. Simulation of these analysis is carried out initially on a sphere and then on different segments of the TMT, in order to study the induced measurement errors. COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only. Creator An entity primarily responsible for making the resource Valsan V.; Sriram S.; Basheer A.; Varadhachari J.; Anupama G.C. Source A related resource from which the described resource is derived Proceedings of SPIE - The International Society for Optical Engineering, Vol-10742 Publisher An entity responsible for making the resource available SPIE Date A point or period of time associated with an event in the lifecycle of the resource 2018-01-01 Identifier An unambiguous reference to the resource within a given context <a href="https://doi.org/10.1117/12.2321083" target="_blank" rel="noreferrer noopener">https://doi.org/10.1117/12.2321083</a> <br /><br /><a href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-85056446993&amp;doi=10.1117%2F12.2321083&amp;partnerID=40&amp;md5=0a4432a412c85cd57a774d9bdd9e12f7" target="_blank" rel="noreferrer noopener">https://www.scopus.com/inward/record.uri?eid=2-s2.0-85056446993&amp;doi=10.1117%2f12.2321083&amp;partnerID=40&amp;md5=0a4432a412c85cd57a774d9bdd9e12f7</a> Rights Information about rights held in and over the resource Restricted Access Relation A related resource ISSN: 0277786X; ISBN: 978-151062055-1; CODEN: PSISD Format The file format, physical medium, or dimensions of the resource Online Language A language of the resource English Type The nature or genre of the resource Conference paper Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Valsan V., CHRIST(Deemed to Be University), Hosur Road, Bengaluru, 560029, India, Indian Institute of Astrophysiscs, II Block, Koramangala, Bengaluru, 560034, India; Sriram S., Indian Institute of Astrophysiscs, II Block, Koramangala, Bengaluru, 560034, India; Basheer A., Indian Institute of Astrophysiscs, II Block, Koramangala, Bengaluru, 560034, India; Varadhachari J., Indian Institute of Astrophysiscs, II Block, Koramangala, Bengaluru, 560034, India; Anupama G.C., Indian Institute of Astrophysiscs, II Block, Koramangala, Bengaluru, 560034, India