Optical system design of spaceborne infrared dual-band hyperspectral imager

Baohua Wang; Bing Li; Xuguo Zhang

doi:10.1117/12.2624238

27 March 2022 Optical system design of spaceborne infrared dual-band hyperspectral imager

Baohua Wang, Bing Li, Xuguo Zhang

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 121694X (2022) https://doi.org/10.1117/12.2624238
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

In order to meet the remote sensing application requirements for high spatial resolution, hyperspectral resolution and wide swatch, the next generation spaceborne high-resolution hyperspectral imager is put forward. The spatial resolution is 15m, the swatch is 90km and the hyperspectral resolution can be better than 5nm and 10nm in the spectral range 0.4μm~1.0μm and 1.0μm~2.5μm respectively. The index parameters are optimized depending on SNR and MTF. Then the telescope optical system and spectral imaging optical system are designed owing to the optical technical parameters. A new reimaging off-axis multi-mirror anastigmatic configuration is adopted and the freeform surface is used on the off-axis mirror to realize the telecentric design with wide field of view and large relative aperture. The results show that the distortion is lower than 0.44%. The Offner configuration is applied in the spectral imaging optical system and off-axis lens are used to deduce the length and obtain higher imaging performance. The keystone and smile both can be controlled within 1/10 pixel. The optical system of spaceborne high-resolution hyperspectral imager has so favorable imaging quality and compact volume that can satisfy the demand of multiple application areas.

Citation Download Citation

Baohua Wang, Bing Li, and Xuguo Zhang "Optical system design of spaceborne infrared dual-band hyperspectral imager", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 121694X (27 March 2022); https://doi.org/10.1117/12.2624238

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KEYWORDS

Imaging systems

Hyperspectral imaging

Infrared imaging

Infrared radiation

Telescopes

Imaging spectroscopy

Modulation transfer functions

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