Issue 9, 2025

Design and analysis of a spectral imaging detection instrument based on a digital micromirror device

Abstract

We present the design of a spectral imaging inspection instrument based on a Digital Micromirror Device (DMD). The instrument utilizes an enhanced optical path that is compatible with the near-ultraviolet spectrum. The optical path design leverages the flexibility and high reliability of DMDs to enable precise control over spatial light modulation and spectral wavelength selection. Additionally, we evaluated the instrument's spectral range and spatial resolution using a mercury lamp and a resolution plate. The results indicate that the instrument operates within the 250–500 nm range, with a spatial resolution of up to 35 μm. Finally, we use the plasma generated by the Laser-Induced Breakdown Spectroscopy (LIBS) instrument as the observed sample. Instrumental observations reveal subtle spatio-temporal variations in the plasma across different spectral lines.

Graphical abstract: Design and analysis of a spectral imaging detection instrument based on a digital micromirror device

Supplementary files

Article information

Article type
Paper
Submitted
25 Apr 2025
Accepted
21 Jul 2025
First published
22 Jul 2025

J. Anal. At. Spectrom., 2025,40, 2573-2581

Design and analysis of a spectral imaging detection instrument based on a digital micromirror device

T. Gu, Z. Xu, Z. Wang, J. Huang, G. Yang and C. Li, J. Anal. At. Spectrom., 2025, 40, 2573 DOI: 10.1039/D5JA00160A

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