Open AccessMulti-aperture system approach for snapshot multispectral imaging applications
Author(s) -
Martin Hubold,
Elisabeth Montag,
R. Berlich,
Róbert Brunner,
Robert Brüning
Publication year - 2021
Publication title -
optics express
Language(s) - Danish
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.412655
Subject(s) - multispectral image , optics , spectral imaging , snapshot (computer storage) , liquid crystal tunable filter , pixel , wavelength , hyperspectral imaging , aperture (computer memory) , optical filter , computer science , image resolution , materials science , physics , computer vision , artificial intelligence , acoustics , operating system
We present an ultra-compact system approach for snapshot, multispectral imaging. It is based on a slanted linear variable spectral filter mounted in close proximity to the entrance pupil of a micro-optical, multi-aperture imaging system. A compact demonstration setup with a size of only 60 × 60 × 28 mm 3 is developed, which enables the acquisition of 66 spectral channels in a single shot and offers a linear spectral sampling of approximately six nanometers over an extended wavelength range of 450-850 nm. The spatial sampling of each channel covers up to 400 × 400 pixels. First, the concept, the optical design and the fabrication are detailed. After the optical performance characterization, a comprehensive calibration strategy is developed and applied. An experimental demonstration is performed by acquiring the spatial and the spectral information of an imaged test scene.