Optical assembly of a visible through thermal infrared multispectral imaging system

被引：4

作者：

Henson, T ^{[1
]}

Bender, S ^{[1
]}

Byrd, D ^{[1
]}

Rappoport, W ^{[1
]}

Shen, GY ^{[1
]}

机构：

[1] Sandia Natl Labs, Albuquerque, NM 87185 USA

来源：

EARTH OBSERVING SYSTEMS III | 1998年 / 3439卷

关键词：

multispectral; optical; calibration; telescope; mirror; space; earth; observing; imaging; WFOV;

D O I：

10.1117/12.325614

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

The Optical Assembly (OA) for the Multispectral Thermal Imager (MTI) program has been fabricated, assembled, and successfully tested for its performance. It represents a major milestone achieved towards completion of this earth observing E-O imaging sensor that is to be operated in low earth orbit. Along with its wide field of view (WFOV), 1.82 degrees along-track and 1.38 degrees cross-track, and comprehensive on-board calibration system, the pushbroom imaging sensor employs a single mechanically cooled focal plane with 15 spectral bands covering a wavelength range from 0.45 to 10.7 mu m. The OA has an off-axis three-mirror anastigmatic (TMA) telescope with a 36-cm unobscured clear aperture. The two key performance criteria, 80% enpixeled energy in the visible and radiometric stability of 1% 1 sigma in the visible/near-infrared (VNIR) and short wavelength infrared (SWIR), of 1.45% 1 sigma in the medium wavelength infrared (MWIR), and of 0.53% to long wavelength infrared (LWIR), as well as its low weight (less than 49 kg) and volume constraint (89 cm x 44 cm x 127 cm) drive the overall design configuration of the OA and fabrication requirements.

引用

页码：70 / 78

页数：9