Polarized-pixel performance model for DoFP polarimeter

Abstract

A division of a focal plane (DoFP) polarimeter is manufactured by placing a micropolarizer array directly onto the focal plane array (FPA) of a detector. Each element of the DoFP polarimeter is a polarized pixel. This paper proposes a performance model for a polarized pixel. The proposed model characterizes the optical and electronic performance of a polarized pixel by three parameters. They are respectively major polarization responsivity, minor polarization responsivity and polarization orientation. Each parameter corresponds to an intuitive physical feature of a polarized pixel. This paper further extends this model to calibrate polarization images from a DoFP (division of focal plane) polarimeter. This calibration work is evaluated quantitatively by a developed DoFP polarimeter under varying illumination intensity and angle of linear polarization. The experiment proves that our model reduces nonuniformity to 6.79% of uncalibrated DoLP (degree of linear polarization) images, and significantly improves the visual effect of DoLP images.

Shortwave Infrared InGaAs Detectors On-Chip Integrated with Subwavelength Polarization Gratings

“…Compared with the traditional polarization detection methods, including division of time (DoT), division of amplitude (DoAm) and division of aperture (DoA), it has the advantages of compact structure, real-time imaging and high stability. With the development of micro-/nanoprocessing technology, the DoFP polarization detection technology has become a research hotspot [ 20 , 21 , 22 , 23 , 24 , 25 ].…”

Reconstructing Stokes parameters from non-uniform division-of-focal-plane modulation

“…The basic idea of this method has been reported in Ref. [29] and our previous study [30]. Here, we further add a four-…”