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Proceedings Paper

Implementation of Hadamard spectroscopy using MOEMS as a coded aperture
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Paper 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.

Paper Details

Date Published: 20 February 2015
PDF: 6 pages
Proc. SPIE 9258, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VII, 92581H (20 February 2015); doi: 10.1117/12.2072259
Show Author Affiliations
T. Vasile, National Institute for Laser, Plasma and Radiation Physics (Romania)
V. Damian, National Institute for Laser, Plasma and Radiation Physics (Romania)
D. Coltuc, Politehnica Univ. of Bucharest (Romania)
F. Garoi, National Institute for Laser, Plasma and Radiation Physics (Romania)
C. Udrea, National Institute for Laser, Plasma and Radiation Physics (Romania)


Published in SPIE Proceedings Vol. 9258:
Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VII
Ionica Cristea; Marian Vladescu; Razvan Tamas, Editor(s)

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