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

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

doi:10.1364/AO.58.006802

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

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

Optical Sciences

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	6802-6812
Number of pages	11
Journal	Applied optics
Volume	58
Issue number	25
DOIs	https://doi.org/10.1364/AO.58.006802
State	Published - Sep 1 2019

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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10.1364/AO.58.006802

Cite this

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

abstract = "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.",

author = "Dominguez, {Margaret Z.} and Hyukmo Kang and Seonghui Kim and Joshua Berrier and Chambers, {Victor J.} and Qian Gong and Hagopian, {John G.} and Marx, {Catherine T.} and Laurie Seide and Kim, {Dae Wook}",

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T1 - Multi-field merit-function-based regression method for Wide Field Infrared Survey Telescope grism system alignment

AU - Dominguez, Margaret Z.

AU - Kang, Hyukmo

AU - Kim, Seonghui

AU - Berrier, Joshua

AU - Chambers, Victor J.

AU - Gong, Qian

AU - Hagopian, John G.

AU - Marx, Catherine T.

AU - Seide, Laurie

AU - Kim, Dae Wook

PY - 2019/9/1

Y1 - 2019/9/1

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AB - 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.

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

Abstract

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