title: Filters with random transmittance for improving resolution in filter-array-based spectrometers.
abstract: In this paper, we introduce a method for improving the resolution of miniature spectrometers. Our method is based on using filters with random transmittance. Such filters sense fine details of an input signal spectrum, which, when combined with a signal processing algorithm, aid in improving resolution. We also propose an approach for designing filters with random transmittance using optical thin-film technology. We demonstrate that the improvement in resolution is 7-fold when using the filters with random transmittance over what was achieved in our previous work.
authors.affiliation: School of Information and Communications, Gwangju Institute of Science and Technology, South Korea.
authors.forename: J
authors.initials: J
authors.lastname: Oliver
authors.forename: Woong-Bi
authors.initials: WB
authors.lastname: Lee
authors.forename: Heung-No
authors.initials: HN
authors.lastname: Lee
mesh_terms: D000465:Algorithms; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation* / Q000379:methods; D008904:Miniaturization; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted; D013057:Spectrum Analysis / Q000295:instrumentation* / Q000379:methods