TY - GEN
T1 - Research on calibration of three-mirror reflective space remote sensor using wavefront sensorless method
AU - Han, Xingzi
AU - Yu, Xin
AU - Hu, Xinqi
PY - 2010
Y1 - 2010
N2 - Position errors of three-mirror reflective space optical system will affect the whole system badly, so we have to calibrate these errors in orbit. This paper proposes a new method for the first time, which is: we can use Stochastic Parallel Gradient Descent algorithm to calibrate three-mirror reflective remote sensor, this method don't need wavefront sensor to calibrate position errors. It uses root mean square of radius of image as system merit, through controlling the six position of second mirror to compensate system error. This method is suitable for the calibration of three mirror reflective space optical system for its needless of using wavefront sensor. Results of the simulation show that compared with traditional sensitive matrix inversion algorithm, this method increases the dynamic range of initial position errors, and it can improve wavefront error from about 1 wave rms to lower than 0.04 wave rms in the center field of view.
AB - Position errors of three-mirror reflective space optical system will affect the whole system badly, so we have to calibrate these errors in orbit. This paper proposes a new method for the first time, which is: we can use Stochastic Parallel Gradient Descent algorithm to calibrate three-mirror reflective remote sensor, this method don't need wavefront sensor to calibrate position errors. It uses root mean square of radius of image as system merit, through controlling the six position of second mirror to compensate system error. This method is suitable for the calibration of three mirror reflective space optical system for its needless of using wavefront sensor. Results of the simulation show that compared with traditional sensitive matrix inversion algorithm, this method increases the dynamic range of initial position errors, and it can improve wavefront error from about 1 wave rms to lower than 0.04 wave rms in the center field of view.
KW - calibration of three-mirror system in orbit
KW - optical remote sense
KW - stochastic parallel gradient descent control algorithm
KW - wavefront sensorless
UR - http://www.scopus.com/inward/record.url?scp=78650781337&partnerID=8YFLogxK
U2 - 10.1117/12.882361
DO - 10.1117/12.882361
M3 - Conference contribution
AN - SCOPUS:78650781337
SN - 9780819483799
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Optical Design and Testing IV
T2 - Optical Design and Testing IV
Y2 - 18 October 2010 through 20 October 2010
ER -