POLARIZING OPTICAL ELEMENT

摘要

PURPOSE:To provide the element which efficiently takes out polarized light in a specific oscillating direction by using an ordinary light source having the random polarizing state. CONSTITUTION:A polarizing optical, element 10 is provided with a light transmission body 11 like a parallel plane which has a function to rotate the plane of polarization of light in accordance with going of the light, a light-transmissive layer 12 which is joined to one face of the light transmission body 11 and is made of a material having the birefringence property which has a refractive index nX higher than an average refractive index (n) of the light transmission body with respect to at least one plane of polarization (X direction) and has a refractive index nY lower than the average refractive index (n) of the light transmission body with respect to the plane of polarization orthogonal to this plane of polarization, and a reflection face 12 formed on the other face of the light transmission body 11.