Open AccessNew method for characterizing the state of optical and opto-mechanical systems
Author(s) -
Babak Saif,
Ritva Keski-Kuha,
Lee Feinberg,
David Chaney,
Marcel Bluth,
P. Greenfield,
W. Hack,
Scott T. Smith,
James A. Sanders
Publication year - 2014
Publication title -
proceedings of spie, the international society for optical engineering/proceedings of spie
Language(s) - English
Resource type - Conference proceedings
SCImago Journal Rank - 0.192
H-Index - 176
eISSN - 1996-756X
pISSN - 0277-786X
DOI - 10.1117/12.2055243
Subject(s) - primary mirror , telescope , workmanship , james webb space telescope , optics , optical telescope , interferometry , active optics , spitzer space telescope , astronomical interferometer , optical materials , reflecting telescope , physics , secondary mirror , curved mirror , computer science , engineering , operations management
James Webb Space Telescope Optical Telescope Element (OTE) is a three mirror anastigmat consisting of a 6.5 m primary mirror (PM), a secondary mirror (SM) and a tertiary mirror. The primary mirror is made out of 18 segments. The telescope and instruments will be assembled at Goddard Space Flight Center (GSFC) to build the Optical Telescope Element-Integrated Science Instrument Module (OTIS). The OTIS will go through environmental testing at GSFC before being transported to Johnson Space Center for testing at cryogenic temperature. The objective of the primary mirror Center of Curvature test (CoC) is to characterize the PM before and after the environmental testing for workmanship. This paper discusses the CoC test including both a surface figure test and a new method for characterizing the state of the primary mirror using high speed dynamics interferometry.
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