Testing and applicability of the UPC-ZEBRA interferometer as a phasing system in segmented-mirror telescopes
2003年にフルブライト奨学金を受けてカリフォルニア大学アーバイン校で大型分割望遠鏡の位相整合を研究した。\n光学測定と大型分割望遠鏡の位相整合を研究分野とし、Sensofarの研究開発グループをイノベーションと高い技術レベルで常に最先端に立つ卓越した位置付けへと導いている。
Testing and applicability of the UPC-ZEBRA interferometer as a phasing system in segmented-mirror telescopes full article
Agustí Pintó1, Ferran Laguarta1, Roger Artigas1, Cristina Cadevall1
1Center for Sensors, Instruments and Systems Development (CD6), Universitat Politècnica de Catalunya (UPC) Rambla Sant Nebridi, 10, E-08222 Terrassa, Spain.
Applied Optics, Vol. 43, Issue 5, pp. 1091-1096 (2004)
Abstract
In segmented-mirror telescopes, wave-front discontinuities caused by segment misalignment are a major problem because they severely degrade optical performance. While angular misalignments are usually measured with deflectometric wave-front sensors (e.g., Shack-Hartmann sensors), a number of techniques have been proposed for the measurement of vertical discontinuities (pistons). In earlier papers we presented an instrument called UPC-ZEBRA that uses a novel interferometric technique to measure piston error during the daytime with an uncertainty of 5 nm within a 30-μm range. Here we present the most representative results obtained during the testing stage and a detailed analysis of error sources. The main modifications to be introduced for the instrument’s use as a phasing calibration system are also outlined.
