Digital micromirror device enabled integral field spectroscopy with the Hadamard transform technique

Kathleen Oram; Zoran Ninkov

doi:10.1117/12.2563207

13 December 2020 Digital micromirror device enabled integral field spectroscopy with the Hadamard transform technique

Kathleen Oram, Zoran Ninkov

Proceedings Volume 11446, Optical and Infrared Interferometry and Imaging VII; 114462Y (2020) https://doi.org/10.1117/12.2563207
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

Spectroscopic measurements often require increased observing time to achieve a desired SNR. Multiplexed measurements of faint signals can improve the SNR in a more efficient manner. The Hadamard transform multiplexing technique offers the highest improvement in SNR of reconstructed signals. A Hadamard Transform Spectral Imager (HTSI) implements the technique through 2D spatial multiplexing to measure spatially resolved spectra with a gain in SNR. This can be implemented on existing and proposed Digital Micromirror Device (DMD) based multi-object spectrometers (MOS) as an HTSI observing mode. The HTSI mode enables the instrument to perform integral field spectroscopy with a gain in SNR. In this work we present preliminary results from modeling the performance of a DMD based HTSI for various sources of noise, signal fluctuations, and observation targets. We also present a plan to implement the technique with the SOAR Adaptive-Module Optical Spectrograph (SAMOS) instrument, a DMD based MOS.

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Citation Download Citation

Kathleen Oram and Zoran Ninkov "Digital micromirror device enabled integral field spectroscopy with the Hadamard transform technique", Proc. SPIE 11446, Optical and Infrared Interferometry and Imaging VII, 114462Y (13 December 2020); https://doi.org/10.1117/12.2563207

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