Acta Optica Sinica, Volume. 29, Issue 12, 3545(2009)
System Design of the Integrating Sphere Used for on-Board Calibration of Visible-SWIR Hyperspectral Remote Sensors
On-board calibration system is an important technical component for effectively monitoring the performance of radiometric response of remote sensors,the development of hyperspectral technique and information application require more advanced on-board calibration system and more high performance index,which include challenging problems such as nonconforming to spectral distribution of solar,compact system structure and stability. This research promoted a rather full art scheme aiming at above problems,which included tow internal lamps taken as the light source,a minitype integrating sphere used as uniform body,a color temperature correction technique applied for improving the spectral distribution and a standard radiometer fixed interiorly for monitoring the stability of the system. Combining the spaceflight environment request,system design was performed and some experiment results suitable for definite engineering apllication were abtained. The output spectral radiance in visible-SWIR achieves 0.9 times of the radiance of exoatmosphere solar illuminating lambertian surface. The surface ununiformity is within 0.6% and the difference of radiance within ±15°is 1.5%,and the system weight and volume are less than 1.2 kg,0.002 m3 respectively. The bootstrap stabilizing time is 5 min and the radiation output within about 200 h keeps good stability.
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Yang Benyong, Zhang Liming, Chen Hongyao, Qiao Yanli. System Design of the Integrating Sphere Used for on-Board Calibration of Visible-SWIR Hyperspectral Remote Sensors[J]. Acta Optica Sinica, 2009, 29(12): 3545
Category: Remote Sensing and Sensors
Received: Apr. 22, 2009
Accepted: --
Published Online: Dec. 23, 2009
The Author Email: Benyong Yang (byyang@aiofm.ac.cn)