A Caltech Library Service

Design of a precision calibration unit for Keck NIRC2 AO instrument

Lin, Zeren and Kumar, Tarun and Chen, Xun and Lu, Jessica and Wizinowich, Peter and Lilley, Scott and Wetherell, Ed and McConnell, Nicholas (2020) Design of a precision calibration unit for Keck NIRC2 AO instrument. In: Adaptive Optics Systems VII. Proceedings of SPIE. No.11448. Society of Photo-optical Instrumentation Engineers , Bellingham, WA, Art. No. 1144879. ISBN 9781510636835.

[img] PDF (Conference Poster) - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


High-precision astrometry has the potential to address questions in planet formation, black hole science, Galactic structure, and more. However, in order to achieve a precision of sub-milli arcseconds (mas), we need a calibration method better than the current techniques such as on-sky calibration using calibrated stellar or stellar cluster systems, which have a precision of ~1 mas. Precision calibration unit with a regular grid of photo-lithographically manufactured pinholes combined with self-calibration techniques, on the other hand, is a new and innovative way to potentially achieve a precision of sub-mas over the entire field of view. This technique is beneficial to adaptive optic (AO) instruments for future telescopes like the Thirty Meter Telescope (TMT). In this work, we present our design for a new astrometric calibration unit to feed the NIRC2 AO instrument at the W. M. Keck Observatory. It allows calibration over a large field of view of 47" x 47".

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Lu, Jessica0000-0001-9611-0009
Wizinowich, Peter0000-0002-1646-442X
Additional Information:© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).
Series Name:Proceedings of SPIE
Issue or Number:11448
Record Number:CaltechAUTHORS:20210115-125705884
Persistent URL:
Official Citation:Zeren Lin, Tarun Kumar, Xun Chen, Jessica Lu, Peter Wizinowich, Scott Lilley, Ed Wetherell, and Nicholas McConnell "Design of a precision calibration unit for Keck NIRC2 AO instrument", Proc. SPIE 11448, Adaptive Optics Systems VII, 1144879 (13 December 2020);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107509
Deposited By: Tony Diaz
Deposited On:15 Jan 2021 21:06
Last Modified:16 Nov 2021 19:03

Repository Staff Only: item control page