Grid Polarizer and Method for Manufacturing the Same

A manufacturing method of a grid polarizer comprising air or inert gas filled in a space framed by a first layer, layers A and a third layer which comprises steps of:

• forming a plurality of the layers A comprising a material being 1.0 or more in an absolute value of a difference between a real part n and an imaginary part κ in a complex refractive index (N=n−iκ), in which the layers A are extended in an elongated linear state and separately arranged side by side on the principal surface of the first layer composed of a transparent material;
• and
• forming the third layer bridging between the tops of the adjacent layers A in a separate state by vapor-deposition of an inorganic oxide or an inorganic nitride onto the principal surface of the first layer from an oblique direction.

A manufacturing method of a grid polarizer comprising air or inert gas filled in a space framed by a first layer, layers A and a third layer which comprises steps of:

• forming the layer A comprising a material being 1.0 or more in an absolute value of a difference between a real part n and an imaginary part κ in a complex refractive index (N=n−iκ) on the top face of a ridge and along the ridge in which a plurality of the ridges are extended in an elongated linear state arranged side by side on the surface of the first layer composed of a transparent material, and
• forming the third layer bridging between the tops of the adjacent layers A in a separate state by vapor-deposition of an inorganic oxide or an inorganic nitride onto the principal surface of the first layer from an oblique direction.