The method of improving the spatial resolution of the matrix spectrometer

Yury Krot; Boris Beliaev; Leonid Katkovsky

doi:10.1117/12.2066852

7 October 2014 The method of improving the spatial resolution of the matrix spectrometer

Yury Krot, Boris Beliaev, Leonid Katkovsky

Proceedings Volume 9241, Sensors, Systems, and Next-Generation Satellites XVIII; 924121 (2014) https://doi.org/10.1117/12.2066852
Event: SPIE Remote Sensing, 2014, Amsterdam, Netherlands

Abstract

The videospectral system (VSS) intended for ecological space experiment on board of the International Space Station (ISS) has been developed by the Aerospace Researches Department of the Institute of Applied Physical Problems of the Belarusian State University. The system comprises three matrix spectrometers MP-15. The polychromator of each spectrometer includes the imaging fiber, the entrance slit, concave holographic diffraction grating, and a CCD array detector. The array photodetector measures the spectral radiation distribution in rows, and the spatial distribution (image) in columns. Astigmatism is a typical aberration of polychromators based on concave spherical gratings – rays in tangential and sagittal planes are focused at different points. This degrades as for spectral and spatial resolution along the entrance slit. The proposed method of obtaining high spatial resolution without spectral resolution loss consists in the displacement of the output end of the imaging fiber along the optical axis at a specified distance from the entrance slit. After that the rays in the tangential and sagittal planes focus at one point. The entrance slit operates as a one-dimensional aperture to obtain high spectral resolution.

Citation Download Citation

Yury Krot, Boris Beliaev, and Leonid Katkovsky "The method of improving the spatial resolution of the matrix spectrometer ", Proc. SPIE 9241, Sensors, Systems, and Next-Generation Satellites XVIII, 924121 (7 October 2014); https://doi.org/10.1117/12.2066852

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