The GMT Telescope Metrology System: easing the complexity of initial and operational alignment and increasing observing efficiency

被引：1

作者：

Sitarski, Breann ^{[1
]}

Rakich, Andrew ^{[2
]}

Chiquito, Hugo ^{[1
]}

Rosenthal, Wylie ^{[1
]}

Pires, Priscila ^{[3
]}

Thompson, Peter ^{[1
]}

Aguayo, Francisco ^{[1
]}

Schoenell, William ^{[1
]}

Schurter, Patricio ^{[1
]}

Brossus, Glenn ^{[1
]}

Conan, Rodolphe ^{[1
]}

Bouchez, Antonin ^{[1
]}

Angeli, George ^{[1
]}

Beifus, Keath ^{[1
]}

Lam, King-Ming ^{[1
]}

Gardner, Paul ^{[1
]}

Thomas, David ^{[1
]}

机构：

[1] GMTO Corp, 465 N Halstead St,Suite 250, Pasadena, CA 91107 USA

[2] Mersenne Opt Consulting, 41 Rimu Rd, Paraparaumu 5032, New Zealand

[3] Univ Sao Paulo, Dept Astron, IAG, BR-05508900 Sao Paulo, Brazil

来源：

GROUND-BASED AND AIRBORNE TELESCOPES VIII | 2020年 / 11445卷

关键词：

3D metrology; telescope alignment; pointing models; absolute distance interferometry; differential distance measuring interferometry; active optics;

D O I：

10.1117/12.2560681

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Giant Magellan Telescope will be a 25.4-m visible and infrared telescope at Las Campanas Observatory. The optical design consists of 7 8.4-m primary mirror segments that reflect light to 7 secondary mirror segments in a doubly segmented direct Gregorian configuration. Each mirror pair must be coaligned and co-boresighted. During operations, the alignment of the optical components will deflect due to variations in temperature, gravity-induced structure flexure of the mount, and, on a scale relevant to phasing, vibrations. The doubly segmented nature and size of the GMT will create a novel set of challenges for initial assembly, integration, and verification and maintaining high-precision alignment of the optical elements during operations. GMT is developing a Telescope Metrology System (TMS) that uses 3D laser metrology systems to decrease the complexity of alignment and increase observatory efficiency. This paper discusses the 4 subsystems of TMS as well as their operational modes.

引用

页数：18

共 4 条

[1] The GMT telescope metrology system design
Sitarski, Breann N.
Rakich, Andrew
Chiquito, Hugo
Rosenthal, Wylie
Bouchez, Antonin H.
Schoenell, William
Xin, Bo
Pires, Priscila
Nissen, Joel
Schurter, P.
Demers, Richard T.
Thompson, Peter
McLeod, Brian
Nemati, Bijan
Brossus, Glenn
Walls, Brian
Choi, Heejoo
Gonzalez, Guillermo
Nemati, David
[J]. GROUND-BASED AND AIRBORNE TELESCOPES IX, 2022, 12182
[2] Prototyping the GMT Telescope Metrology System on LBT
Rakich, A.
Schurter, P.
Conan, R.
Hill, J. M.
Gardiner, M.
Bec, M.
Kuhn, O.
[J]. GROUND-BASED AND AIRBORNE TELESCOPES VII, 2018, 10700
[3] Calibration and alignment of metrology system for the Nuclear Spectroscopic Telescope Array mission
Liebe, Carl Christian
Craig, William
Kim, Yunjin
McLean, Ryan
Meras, Patrick, Jr.
Raffanti, Michael
Scholz, Christopher
[J]. OPTICAL ENGINEERING, 2012, 51 (04)
[4] Increasing observing efficiency by modeling telescope focus positions - art. no. 70183W
Gajadhar, Sarah
Salmon, Derrick
Barrick, Gregory
[J]. ADVANCED OPTICAL AND MECHANICAL TECHNOLOGIES IN TELESCOPES AND INSTRUMENTATION, PTS 1-3, 2008, 7018 : W183 - W183

← 1 →