Snapshot Imaging Spectrometer Based on Pixel-Level Filter Array (PFA)
| Autor: | Liu Chunyu, Shuai Liu, Fan Xinghao, Weiyang Song, Xie Yunqiang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
medicine.medical_specialty
Computer science Imaging spectrometer ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION 02 engineering and technology lcsh:Chemical technology 01 natural sciences Biochemistry Article pixel-level filter array Analytical Chemistry 010309 optics Data cube Optics 0103 physical sciences 0202 electrical engineering electronic engineering information engineering medicine lcsh:TP1-1185 Electrical and Electronic Engineering Instrumentation snapshot spectral imaging Relay lens Spectrometer Pixel simple implementation business.industry Atomic and Molecular Physics and Optics Spectral imaging Filter (video) low computational burden 020201 artificial intelligence & image processing Monochromatic color business |
| Zdroj: | Sensors (Basel, Switzerland) Sensors Volume 21 Issue 7 Sensors, Vol 21, Iss 2289, p 2289 (2021) |
| ISSN: | 1424-8220 |
| Popis: | Snapshot spectral imaging technology plays an important role in many fields. However, most existing snapshot imaging spectrometers have the shortcomings of a large volume or heavy computational burden. In this paper, we present a novel snapshot imaging spectrometer based on the pixel-level filter array (PFA), which can simultaneously obtain both spectral and spatial information. The system is composed of a fore-optics, a PFA, a relay lens, and a monochromatic sensor. The incoming light first forms an intermediate image on the PFA through the fore-optics. Then, the relay lens reimages the spectral images on the PFA onto the monochromatic sensor. Through the use of the PFA, we can capture a three-dimensional (spatial coordinates and wavelength) datacube in a single exposure. Compared with existing technologies, our system possesses the advantages of a simple implementation, low cost, compact structure, and high energy efficiency by removing stacked dispersive or interferometric elements. Moreover, the characteristic of the direct imaging mode ensures the low computational burden of the system, thus shortening the imaging time. The principle and design of the system are described in detail. An experimental prototype is built and field experiments are carried out to verify the feasibility of the proposed scheme. |
| Databáze: | OpenAIRE |
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