Detailed characterization of a mosaic based hyperspectral snapshot imager
| Autor: | Freya-Elin Hämmerling, Otto Hauler, David Fleischle, Oliver Schwanke, Karsten Rebner, Wolfgang Osten, Marc Brecht, Robin Hahn, Tobias Haist |
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| Rok vydání: | 2020 |
| Předmět: |
Bayer filter
Computer science General Engineering Hyperspectral imaging 02 engineering and technology 01 natural sciences Atomic and Molecular Physics and Optics 010309 optics Wavelength 020210 optoelectronics & photonics 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Snapshot (computer storage) Remote sensing |
| Zdroj: | Optical Engineering. 59 |
| ISSN: | 0091-3286 |
| Popis: | Some widely used optical measurement systems require a scan in wavelength or in one spatial dimension to measure the topography in all three dimensions. Novel hyperspectral sensors based on an extended Bayer pattern have a high potential to solve this issue as they can measure three dimensions in a single shot. This paper presents a detailed examination of a hyperspectral sensor including a description of the measurement setup. The evaluated sensor (Ximea MQ022HG-IM-SM5X5-NIR) offers 25 channels based on Fabry–Perot filters. The setup illuminates the sensor with discrete wavelengths under a specified angle of incidence. This allows characterization of the spatial and angular response of every channel of each macropixel of the tested sensor on the illumination. The results of the characterization form the basis for a spectral reconstruction of the signal, which is essential to obtain an accurate spectral image. It turned out that irregularities of the signal response for the individual filters are present across the whole sensor. |
| Databáze: | OpenAIRE |
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