In this paper, a new NIR polarization detector is presented. It is fabricated out of a wire grid polarizer attaching to the surface of a FPA. A brand new method solving linear polarization is proposed at the same time. The transmittance and the angle of the wire grid are corrected. The effect on the degree of linear polarization ( DoLP) measurement is also eliminated in this report. Theoretically, the infrared polarized image quality is independent of the transmittance and angle of wire grid. The experiment uses a blackbody source as the calibration light. The results show that, while ignoring the crosstalk between the polarized pixels, the measured value is about 14% ～ 24% of the true value. After adding the transmittance correction, the data reaches the level of 80% ～ 120% while it becomes 96%to 104% by applying the angle correction.