TRANSMISSION TYPE POLARIZING ELEMENT, AND COMPLEX POLARIZING PLATE USING THE ELEMENT

摘要

Provided is a transmission type polarizing element (1), which is constituted to comprise a dielectric substrate (3) having such a structure on the surface of its one side that a plurality of ridges (2) of an angular section are arranged in parallel, a thin film (4) made of an optically absorptive substance and formed on the surface of the angularly sectional ridges (2), and a first dielectric substance layer (5) for covering such a surface of the thin film (4) made of the optically absorptive substance as is located on the opposite side of the dielectric substrate (3). This transmission type polarizing element (1) transmits such a TM polarizing component of the light normally incident on the dielectric substrate (3) that the vibration direction of a magnetic field is identical to the longitudinal direction of the ridges (2), but absorbs a TM polarizing component having the same vibration direction of the magnetic field as the longitudinal direction of the ridges (2). By the convenient constitution, therefore, it is possible to provide the transmission type polarizing element, which can be used as the polarizing plate having little return light but an excellent durability.