Title :
Bioinspired Focal-Plane Polarization Image Sensor Design: From Application to Implementation
Author :
Milin Zhang ; Xiaotie Wu ; Nan Cui ; Engheta, Nader ; Van der Spiegel, Jan
Author_Institution :
Dept. of Electr. & Syst. Eng., Univ. of Pennsylvania, Philadelphia, PA, USA
Abstract :
In this paper, a bioinspired monolithic complementary metal-oxide-semiconductor (CMOS) polarization image sensor is described as a solution to real-time polarization image capture. Metallic wire-grid gratings are integrated onto standard CMOS image sensor arrays with different orientations. A numerical analysis is performed to guide the design of the wire-grid arrays. Experimental results from different CMOS processing units are compared. A current-mode polarization processing unit is designed, fabricated, and tested in order to perform the extraction of the polarization characteristics from the captured intensities. This paper illustrates how polarization image processing can be used to monitor live cells. Several polarization processing methods with different computational complexity and data requirements have been applied and compared.
Keywords :
CMOS image sensors; computational complexity; diffraction gratings; focal planes; image processing; integrated circuit testing; light polarisation; numerical analysis; sensor arrays; bioinspired focal-plane polarization image sensor design; bioinspired monolithic CMOS polarization image sensor array; complementary metal-oxide-semiconductor; computational complexity; current-mode processing unit; metallic wire-grid grating array; numerical analysis; polarization image processing method; real-time polarization image capture; Biosensors; CMOS integrated circuits; Gratings; Image processing; Image sensors; Optical filters; Polarization; Sensitivity; Bioinspired CMOS image sensor; metallic gratings; polarimetry; polarization;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/JPROC.2014.2347351
