Implementation of Hadamard spectroscopy using MOEMS as a coded aperture

T. Vasile; V. Damian; D. Coltuc; F. Garoi; C. Udrea

doi:10.1117/12.2072259

20 February 2015 Implementation of Hadamard spectroscopy using MOEMS as a coded aperture

T. Vasile, V. Damian, D. Coltuc, F. Garoi, C. Udrea

Proceedings Volume 9258, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VII; 92581H (2015) https://doi.org/10.1117/12.2072259
Event: Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies 2014, 2014, Constanta, Romania

Abstract

Although nowadays spectrometers reached a high level of performance, output signals are often weak and traditional slit spectrometers still confronts the problem of poor optical throughput, minimizing their efficiency in low light setup conditions. In order to overcome these issues, Hadamard Spectroscopy (HS) was implemented in a conventional Ebert Fastie type of spectrometer setup, by substituting the exit slit with a digital micro-mirror device (DMD) who acts like a coded aperture. The theory behind HS and the functionality of the DMD are presented. The improvements brought using HS are enlightened by means of a spectrometric experiment and higher SNR spectrum is acquired. Comparative experiments were conducted in order to emphasize the SNR differences between HS and scanning slit method. Results provide a SNR gain of 3.35 favoring HS. One can conclude the HS method effectiveness to be a great asset for low light spectrometric experiments.

Citation Download Citation

T. Vasile, V. Damian, D. Coltuc, F. Garoi, and C. Udrea "Implementation of Hadamard spectroscopy using MOEMS as a coded aperture", Proc. SPIE 9258, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VII, 92581H (20 February 2015); https://doi.org/10.1117/12.2072259

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