Portable Raman Instrumentation with a Digital Micromirror for the Analysis of Mixtures

Abstract

A portable Raman spectrometer cannot complete homogeneity analysis of mixtures due to its low accuracy which limits the applications. Here a Raman sensing system based on a digital micromirror device (DMD) is presented. Combined with a digital micromirror, the fixed-focus measurement has been changed with high-frequency mobile measurements which expands the applications. Using fast scanning detection by the digital micromirror, the usual fixed focus (generally 50 μm diameter) is upgraded to high-speed surface scanning. The side length of the scanning rectangle may set according to the application or sample size. The point-by-point scanning function further improves the analysis of mixtures through multi-point measurement of samples in a specific area.

Keywords:

• Digital micromirror device (DMD)
• portable Raman spectrometer
• microelectromechanical system (MEMS)

Acknowledgments

We thank LetPub (www.letpub.com) for its linguistic assistance during the preparation of this manuscript.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (Grant Number 62003047), Shenzhen Science and Technology Program (Grant Number JSGG20191129105842769), and the Supportive Project for Teachers at Beijing Information Science and Technology University (2019–2021).