A hyperspectral imaging sensor for the coastal environment

被引：17

作者：

Fisher, J ^{[1
]}

Antoniades, J ^{[1
]}

Rollins, C ^{[1
]}

Xiang, L ^{[1
]}

机构：

[1] USN, Res Lab, Washington, DC 20375 USA

来源：

INTERNATIONAL OPTICAL DESIGN CONFERENCE 1998 | 1998年 / 3482卷

关键词：

imaging spectrograph; hyperspectral; three-mirror anastigmat; and convex holographic gratings; Navy EarthMap Observer Satellite;

D O I：

10.1117/12.322003

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Recent advances in large format detector arrays and holographic diffraction gratings have made possible the development of imaging spectrographs with high sensitivity and resolution ideally suited for space-based remote sensing of earth resources. An optical system composed of dual spectrographs and a common fore-optic has been designed for the visible-near infrared (VNIR) and shortwave bands with IO-nm spectral resolution, providing 30-meter ground resolution from an altitude of 605 lan. The spectrograph designs are based on a modified Offner I-X relay with spherical mirrors and a convex spherical holographic grating for the secondary mirror. The fore-optic is a three-mirror anastigmatic telescope with a 360-mm focal length to match the pixel pitch of the respective 1024x1024 visible silicon CCD and SWIR HgCdTe FPAs. The primary advantages of this design are the relatively low f-number (f/3), large flat field (18mm), and low distortion. Preliminary performance results of a VNIR testbed grating and spectrograph are presented and compared to the design predictions.

引用

页码：179 / 186

页数：8

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