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Title: Focal Plane Metrology for the LSST Camera

Abstract

Meeting the science goals for the Large Synoptic Survey Telescope (LSST) translates into a demanding set of imaging performance requirements for the optical system over a wide (3.5{sup o}) field of view. In turn, meeting those imaging requirements necessitates maintaining precise control of the focal plane surface (10 {micro}m P-V) over the entire field of view (640 mm diameter) at the operating temperature (T {approx} -100 C) and over the operational elevation angle range. We briefly describe the hierarchical design approach for the LSST Camera focal plane and the baseline design for assembling the flat focal plane at room temperature. Preliminary results of gravity load and thermal distortion calculations are provided, and early metrological verification of candidate materials under cold thermal conditions are presented. A detailed, generalized method for stitching together sparse metrology data originating from differential, non-contact metrological data acquisition spanning multiple (non-continuous) sensor surfaces making up the focal plane, is described and demonstrated. Finally, we describe some in situ alignment verification alternatives, some of which may be integrated into the camera's focal plane.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
897452
Report Number(s):
SLAC-PUB-12290
TRN: US200705%%249
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Journal Name: Submitted to Proc.SPIE Int.Soc.Opt.Eng.6273; Conference: To appear in the proceedings of Astronomical Telescopes and Instrumentation 2006, Orlando, Florida, 24-31 May 2006
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALIGNMENT; CAMERAS; DESIGN; OPTICAL SYSTEMS; PERFORMANCE; TELESCOPES; OPTICS; ASTROPHYSICS; Astrophysics,ASTRO

Citation Formats

A Rasmussen, Andrew P., Hale, Layton, Kim, Peter, Lee, Eric, Perl, Martin, Schindler, Rafe, Takacs, Peter, Thurston, Timothy, and /SLAC. Focal Plane Metrology for the LSST Camera. United States: N. p., 2007. Web.
A Rasmussen, Andrew P., Hale, Layton, Kim, Peter, Lee, Eric, Perl, Martin, Schindler, Rafe, Takacs, Peter, Thurston, Timothy, & /SLAC. Focal Plane Metrology for the LSST Camera. United States.
A Rasmussen, Andrew P., Hale, Layton, Kim, Peter, Lee, Eric, Perl, Martin, Schindler, Rafe, Takacs, Peter, Thurston, Timothy, and /SLAC. Wed . "Focal Plane Metrology for the LSST Camera". United States. doi:. https://www.osti.gov/servlets/purl/897452.
@article{osti_897452,
title = {Focal Plane Metrology for the LSST Camera},
author = {A Rasmussen, Andrew P. and Hale, Layton and Kim, Peter and Lee, Eric and Perl, Martin and Schindler, Rafe and Takacs, Peter and Thurston, Timothy and /SLAC},
abstractNote = {Meeting the science goals for the Large Synoptic Survey Telescope (LSST) translates into a demanding set of imaging performance requirements for the optical system over a wide (3.5{sup o}) field of view. In turn, meeting those imaging requirements necessitates maintaining precise control of the focal plane surface (10 {micro}m P-V) over the entire field of view (640 mm diameter) at the operating temperature (T {approx} -100 C) and over the operational elevation angle range. We briefly describe the hierarchical design approach for the LSST Camera focal plane and the baseline design for assembling the flat focal plane at room temperature. Preliminary results of gravity load and thermal distortion calculations are provided, and early metrological verification of candidate materials under cold thermal conditions are presented. A detailed, generalized method for stitching together sparse metrology data originating from differential, non-contact metrological data acquisition spanning multiple (non-continuous) sensor surfaces making up the focal plane, is described and demonstrated. Finally, we describe some in situ alignment verification alternatives, some of which may be integrated into the camera's focal plane.},
doi = {},
journal = {Submitted to Proc.SPIE Int.Soc.Opt.Eng.6273},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 10 00:00:00 EST 2007},
month = {Wed Jan 10 00:00:00 EST 2007}
}

Conference:
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