Characterization of the JWST Pathfinder mirror dynamics using the center of curvature optical assembly (CoCOA) | Zendy

Conrad Wells | Zendy; James B. Hadaway | Zendy; Gene Olczak | Zendy; Joseph Cosentino | Zendy; John D. Johnston | Zendy; Tony Whitman | Zendy; Mark J. Connolly | Zendy; David Chaney | Zendy; J. Scott Knight | Zendy; Randal Telfer | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Characterization of the JWST Pathfinder mirror dynamics using the center of curvature optical assembly (CoCOA)

Author(s) -

Conrad Wells,

James B. Hadaway,

Gene Olczak,

Joseph Cosentino,

John D. Johnston,

Tony Whitman,

Mark J. Connolly,

David Chaney,

J. Scott Knight,

Randal Telfer

Publication year - 2016

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 - 10.1117/12.2234224

Subject(s) - james webb space telescope , optics , interferometry , primary mirror , physics , piston (optics) , astronomical interferometer , telescope , aperture (computer memory) , pathfinder , curvature , cardinal point , curved mirror , wavefront , computer science , geometry , mathematics , library science , acoustics

The James Webb Space Telescope (JWST) Optical Telescope Element (OTE) consists of a 6.6 m clear aperture, 18 segment primary mirror, all-reflective, three-mirror anastigmat operating at cryogenic temperatures. To verify performance of the primary mirror, a full aperture center of curvature optical null test is performed under cryogenic conditions in Chamber A at the National Aeronautics and Space Administration (NASA) Johnson Space Center (JSC) using an instantaneous phase measuring interferometer. After phasing the mirrors during the JWST Pathfinder testing, the interferometer is utilized to characterize the mirror relative piston and tilt dynamics under different facility configurations. The correlation between the motions seen on detectors at the focal plane and the interferometer validates the use of the interferometer for dynamic investigations. The success of planned test hardware improvements will be characterized by the multi-wavelength interferometer (MWIF) at the Center of Curvature Optical Assembly (CoCOA).

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research