Open AccessBackground suppression in long-distance imaging using volume hologram filters
Author(s) -
Zhi Chen,
Hanhong Gao,
George Barbastathis
Publication year - 2014
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.031123
Subject(s) - optics , holography , noise (video) , signal to noise ratio (imaging) , matched filter , filter (signal processing) , volume (thermodynamics) , background noise , spatial filter , physics , remote sensing , detector , computer science , acoustics , geology , artificial intelligence , computer vision , quantum mechanics , image (mathematics)
We performed experiments using a volume hologram filter (VHF) coupled with a telephoto objective lens to detect weak distant signals masked by strong background noise. The VHF was able to selectively pass light originating from a certain distance while attenuating background noise contributions from other distances, resulting in a higher signal-to-noise ratio (SNR). The proposed method is useful in remote sensing applications such as daytime artificial satellite and space debris detection.