Details

Autor(en) / Beteiligte

• Dominguez, Margaret Z
• Kang, Hyukmo
• Kim, Seonghui
• Berrier, Joshua
• Chambers, Victor J
• Gong, Qian
• Hagopian, John G
• Marx, Catherine T
• Seide, Laurie
• Kim, Dae Wook

Titel

Multi-field merit-function-based regression method for Wide Field Infrared Survey Telescope grism system alignment

Ist Teil von

• Applied optics (2004), 2019-09, Vol.58 (25), p.6802-6812

Ort / Verlag

United States: Optical Society of America

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The grating prism (grism), slitless spectrometer aboard the Wide Field Infrared Survey Telescope enables a survey of emission-line galaxies. To facilitate its opto-mechanical alignment, a six-degree-of-freedom element was fabricated using alignment fiducials and integral flats and used to measure a wavefront by using an infrared interferometer placed at various field points over a 20×14  deg field of view in the grism coordinate frame. Modeling identified E2 to be the most sensitive element to the grism wavefront error and was used to efficiently align the system. The merit function regression method for a wide field of view was further used to verify the higher efficiency and accuracy of the proposed alignment technique compared with the conventional sensitivity table method.