title: Calibration method of microgrid polarimeters with image interpolation.
abstract: Microgrid polarimeters have large advantages over conventional polarimeters because of the snapshot nature and because they have no moving parts. However, they also suffer from several error sources, such as fixed pattern noise (FPN), photon response nonuniformity (PRNU), pixel cross talk, and instantaneous field-of-view (IFOV) error. A characterization method is proposed to improve the measurement accuracy in visible waveband. We first calibrate the camera with uniform illumination so that the response of the sensor is uniform over the entire field of view without IFOV error. Then a spline interpolation method is implemented to minimize IFOV error. Experimental results show the proposed method can effectively minimize the FPN and PRNU.
authors.forename: Zhenyue
authors.initials: Z
authors.lastname: Chen
authors.forename: Xia
authors.initials: X
authors.lastname: Wang
authors.forename: Rongguang
authors.initials: R
authors.lastname: Liang
mesh_terms: D002138:Calibration; D003952:Diagnostic Imaging / Q000295:instrumentation; D004867:Equipment Design; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D055096:Optical Devices; D014066:Palatine Tonsil / Q000473:pathology*; D017785:Photons; D015203:Reproducibility of Results; D059629:Signal-To-Noise Ratio; D012984:Software