POLARIZATION MEASUREMENT METHOD, POLARIZATION MEASUREMENT DEVICE, AND POLARIZATION MEASUREMENT SYSTEM

摘要

PROBLEM TO BE SOLVED: To accurately measure the polarization characteristics of polarized rays of light.SOLUTION: On the basis of light quantity I of the rays of light at each rotational angle to be acquired by detecting the rays of light successively transmitted through a wire grid polarizer 16 and a detection side polarizer 33 while rotating the detection side polarizer 33, a change curve Q showing the periodic change of the light quantity I when the detection side polarizer 33 is rotated is searched, and when the polarization characteristics of polarized rays of light F transmitted through the wire grid polarizer 16 are specified on the basis of the change curve Q, the change curve Q is searched on the basis of the light quantity I at the rotational angle included in a range W of the rotational angle in which a rotational angle =a as one minimum point of the change curve Q is included, and the light quantity I becomes a predetermined value or less.