title: Background suppression in long-distance imaging using volume hologram filters.
abstract: 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.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Chen
authors.forename: Hanhong
authors.initials: H
authors.lastname: Gao
authors.forename: George
authors.initials: G
authors.lastname: Barbastathis