Translator Disclaimer
21 March 1997 Optical path difference model for the Very Large Telescope Interferometer
Author Affiliations +
Proceedings Volume 2871, Optical Telescopes of Today and Tomorrow; (1997) https://doi.org/10.1117/12.269082
Event: Optical Telescopes of Today and Tomorrow, 1996, Landskrona/Hven, Sweden
Abstract
The optical path difference model (OPD model) determines where to position the delay lines in order to compensate for on-axis delay as seen from an astronomical object of known coordinates. This model is equivalent to a pointing model but applied to the interferometric delay. The objective is to reduce the time to search for fringes and to improve the delay lines blind tracking accuracy. This aspect is of prime importance not only when considering the overall operational efficiency of the interferometer but also its ability to quickly observe a set of program objects even after relocation of the auxiliary telescopes. The optical path difference model is based on a precise knowledge of the interferometer configuration by including a set of calibration measurements. This paper describes the main characteristics of the model and includes the results of a simulation developed to fit telescope axis misalignments which contribute to optical path difference errors.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Samuel A. Leveque, Bertrand Koehler, and Oskar von der Luehe "Optical path difference model for the Very Large Telescope Interferometer", Proc. SPIE 2871, Optical Telescopes of Today and Tomorrow, (21 March 1997); https://doi.org/10.1117/12.269082
PROCEEDINGS
8 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

VLTI status update: a decade of operations and beyond
Proceedings of SPIE (July 23 2014)
Data flow system for the very large telescope interferometer
Proceedings of SPIE (October 31 2001)
Scientific support for a space interferometry mission
Proceedings of SPIE (September 09 1993)
VLTI auxiliary telescopes: assembly, integration and testing
Proceedings of SPIE (February 20 2003)
Aperture Synthesis In Space
Proceedings of SPIE (September 25 1989)

Back to Top