Digital Micromirror Devices: from Movie Projectors to Multi-Object Spectrographs
Автор: Carnegie Astronomy
Загружено: 2023-10-02
Просмотров: 4007
Jack Piotrowski (Observatories)
Abstract:
Mechanically robust adaptable slit-masks are challenging to build. Modern digital micromirror devices (DMDs) offer a solution to this difficult task. I present the optical characterization and modeling of DMD performance parameters. The goal of this work is to improve the implementation of DMDs in astronomical instrumentation. DMDs are used as programmable slit masks and are well-suited for multi-object spectroscopy, allowing observers to reconfigure slits nearly instantaneously. The structure of the micromirror array induces wavelength-dependent interference effects, impacting system throughput and scattered light. My optical models improve our understanding of how DMDs affect instrument performance and will help enable the next-generation of multi-object spectrographs from the ultraviolet to the mid-infrared regime. I will use SAMOS – a DMD-based multi-object spectrograph – to observe NGC 3105, a young, low-metallicity cluster in the Milky Way, and ultimately improve evolutionary models of high-mass stars.
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