Progress towards picometer accuracy laser metrology for the space interferometry mission: update

Peter G. Halverson; Oscar Alvarez-Salazar; Alireza Azizi; Frank Dekens; Bijan Nemati; Feng Zhao

doi:10.1117/12.2500128

13 April 2018 Progress towards picometer accuracy laser metrology for the space interferometry mission: update

Peter G. Halverson, Oscar Alvarez-Salazar, Alireza Azizi, Frank Dekens, Bijan Nemati, Feng Zhao

Proceedings Volume 10568, International Conference on Space Optics — ICSO 2004; 105682L (2018) https://doi.org/10.1117/12.2500128
Event: International Conference on Space Optics 2004, 2004, Toulouse, France

Abstract

The Space Interferometry Mission, scheduled for launch in 2008, is an optical stellar interferometer with a 10 meter baseline capable of micro-arcsecond accuracy astrometry. A mission-enabling technology development program conducted at JPL, has yielded the heterodyne interferometric displacement metrology gauges required for monitoring the geometry of optical components of the stellar interferometer, and for maintaining stable starlight fringes. The gauges have <20 picometer linearity, <10 micron absolute accuracy, are stable to <200 pm over the typical SIM observation periods (~1 hour), have the ability to track the motion of mirrors over several meters. We discuss the technology that led to this level of performance: lowcross- talk, low thermal coefficient optics and electronics, active optical alignment, a dual wavelength laser source, and a continuously averaging, high data rate phase measurement technique. These technologies have wide applicability and are already being used outside of the SIM project, such as by the James Webb Space telescope (JWST) and Terrestrial Planet Finder (TPF) missions.

Citation Download Citation

Peter G. Halverson, Oscar Alvarez-Salazar, Alireza Azizi, Frank Dekens, Bijan Nemati, and Feng Zhao "Progress towards picometer accuracy laser metrology for the space interferometry mission: update", Proc. SPIE 10568, International Conference on Space Optics — ICSO 2004, 105682L (13 April 2018); https://doi.org/10.1117/12.2500128

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available