Share Email Print
cover

Proceedings Paper

OAJ 2.6m survey telescope: optical alignment and on-sky evaluation of IQ performances
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

AMOS has recently completed the alignment campaign of the 2.6m telescope for the Observatorio Astrofisico de Javalambre (OAJ). AMOS developed an innovative alignment technique for wide field-of-view telescopes that has been successfully implemented on the OAJ 2.6m telescope with the active support of the team of CEFCA (Centro de Estudios de Física del Cosmos de Aragón). The alignment relies on two fundamental techniques: (1) the wavefront-curvature sensing (WCS) for the evaluation of the telescope aberrations at arbitrary locations in the focal plane, and (2) the comafree point method for the adjustment of the position of the secondary mirror (M2) and of the focal plane (FP). The alignment campaign unfolds in three steps: (a) analysis of the repeatability of the WCS measurements, (b) assessment of the sensitivity of telescope wavefront error to M2 and FP position adjustments, and (c) optical alignment of the telescope. At the end of the campaign, seeing-limited performances are demonstrated in the complete focal plane. With the help of CEFCA team, the image quality of the telescope are investigated with a lucky-imaging method. Image sizes of less than 0.3 arcsec FWHM are obtained, and this excellent image quality is observed over the complete focal plane.

Paper Details

Date Published: 9 August 2016
PDF: 9 pages
Proc. SPIE 9911, Modeling, Systems Engineering, and Project Management for Astronomy VI, 991109 (9 August 2016); doi: 10.1117/12.2234267
Show Author Affiliations
Gregory P. Lousberg, AMOS Ltd. (Belgium)
Christian Bastin, AMOS Ltd. (Belgium)
Vincent Moreau, AMOS Ltd. (Belgium)
Olivier Pirnay, AMOS Ltd. (Belgium)
Carlo Flebus, AMOS Ltd. (Belgium)
Sergio Chueca, Ctr. de Estudios de Física del Cosmos de Aragón (Spain)
César Iñiguez, Ctr. de Estudios de Física del Cosmos de Aragón (Spain)
Alessandro Ederoclite, Ctr. de Estudios de Física del Cosmos de Aragón (Spain)
Héctor Vázquez Ramió, Ctr. de Estudios de Física del Cosmos de Aragón (Spain)
A. Javier Cenarro, Ctr. de Estudios de Física del Cosmos de Aragón (Spain)


Published in SPIE Proceedings Vol. 9911:
Modeling, Systems Engineering, and Project Management for Astronomy VI
George Z. Angeli; Philippe Dierickx, Editor(s)

© SPIE. Terms of Use
Back to Top