Abstract
This paper examines a method for locating within a scene a distribution of an absorbing gas using a passive imaging technique. An oscillatory modulation of the angle of a narrowband dielectric filter located in front of a camera imaging a scene, gives rise to an intensity modulation that differs in regions occupied by the absorbing gas. A preliminary low cost system has been constructed from readily available components which demonstrates how the location of gas within a scene can be implemented. Modelling of the system has been carried out, especially highlighting the transmission effects of the dielectric filter upon different regions of the image.
Original language | English |
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Article number | 13008 |
Journal | Journal of the European optical society |
Volume | 8 |
DOIs | |
Publication status | Published - 31 Jan 2013 |
Keywords
- absorption
- spectral imaging
- modulation