Acta Photonica Sinica, Volume. 43, Issue 10, 1022001(2014)
Optical System Design of Airborne Wide Field-of-view Hyperspectral Imager
Airborne ocean colour remote sensing urgently require wide angle and large relative-aperture hyperspectral imager.Based on the research objective of wide angle and large relative-aperture,an airborne hyperspectral imager optical system was designed using an off-axis two-mirror anastigmat telescope and a modified Offner spectrometer.The field of view of hyperspectral imager was 40°,relative-aperture was 1/2.2,and working waveband was from 0.4 μm to 1μm.Relative aperture and image quality were improved by inserting a concentric meniscus in a classical Offner spectrometer.Ray tracing,optimization and analysis were performed by ZEMAX software.The analyzed results demonstrate that the MTF for different wavelengths is more than 0.67 at Nyquist spatial frequency 28 lp/mm,both smile and keystone are less than 6.5% of the size of pixel.It is easy for spectral and radiation calibration.The design results satisfy the requirements of specifications,the volume is small,mass is low,and is suitable for airborne remote sensing.
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CHEN Wei, ZHENG Yu-quan, XUE Qing-sheng. Optical System Design of Airborne Wide Field-of-view Hyperspectral Imager[J]. Acta Photonica Sinica, 2014, 43(10): 1022001
Received: Jan. 27, 2014
Accepted: --
Published Online: Nov. 6, 2014
The Author Email: Wei CHEN (xueciomp@163.com)