论文信息 - Optical calibration and testing of the E-ELT M4 adaptive mirror

Optical calibration and testing of the E-ELT M4 adaptive mirror

Innovative optical interferometry test setups and control software techniques have been proposed for the E-ELT M4 adaptive optics mirror. The system is composed of three sub-systems: a CGH-based optical test tower, delivering a 1.5- m collimated beam, for fast simultaneous acquisition of large areas; a stitching interferometer, to calibrate at higher spatial frequencies, on smaller areas; and an optical piston sensor to remove differential piston and tilt between adjacent mirror segments.

[1] Armando Riccardi,et al. The optical tests for the E-ELT adaptive mirror demonstration prototype , 2010, Astronomical Telescopes + Instrumentation.

[2] Mats G. Lofdahl,et al. Algorithm for resolving 2π ambiguities in interferometric measurements by use of multiple wavelengths , 2001, Optical Engineering.

[3] Giorgio Pariani,et al. Testing large flats with computer generated holograms , 2012, Other Conferences.

[4] Bruce E. Truax,et al. Absolute Interferometric Testing Of Spherical Surfaces , 1989, Optics & Photonics.

[5] Armando Riccardi,et al. First light AO (FLAO) system for LBT: final integration, acceptance test in Europe, and preliminary on-sky commissioning results , 2010, Astronomical Telescopes + Instrumentation.

[6] Roberto Biasi,et al. Specifications and design of the E-ELT M4 adaptive unit , 2012, Other Conferences.

[7] T. Mast,et al. Phasing the mirror segments of the Keck telescopes: the broadband phasing algorithm. , 1998, Applied optics.