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3 December 2020 Detailed characterization of a mosaic based hyperspectral snapshot imager
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Abstract

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–Pérot 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.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
Robin Hahn, Freya-Elin Hämmerling, Tobias Haist, David Fleischle, Oliver Schwanke, Otto Hauler, Karsten Rebner, Marc Brecht, and Wolfgang Osten "Detailed characterization of a mosaic based hyperspectral snapshot imager," Optical Engineering 59(12), 125102 (3 December 2020). https://doi.org/10.1117/1.OE.59.12.125102
Received: 18 June 2020; Accepted: 12 November 2020; Published: 3 December 2020
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CITATIONS
Cited by 7 scholarly publications and 1 patent.
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KEYWORDS
Sensors

Hyperspectral imaging

Imaging systems

Cameras

Manufacturing

Optical filters

Optical engineering

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