Optical compensation device, liquid crystal display unit, and projection display apparatus

A projection display apparatus provided with a liquid crystal display unit, the liquid crystal display unit comprising:

• a pair of polarizers;
• a liquid crystal display device provided between the pair of polarizers;
• and
• an optical compensation device provided between, of the pair of polarizers, at least one polarizer and the liquid crystal display device,
• wherein the optical compensation device includes
• an underlayer including a plurality of structures that each include first and second surfaces having different inclination angles from each other, and
• a multilayered film formed on the underlayer and including a plurality of first and second refractive index films that are alternately stacked one on top of another repeatedly, and
• an array pitch of the plurality of structures in the underlayer is smaller than a wavelength of visible light.

An optical compensation device comprising:

• an underlayer including a plurality of structures that each include first and second surfaces having different inclination angles from each other;
• and
• a multilayered film formed on the underlayer and including a plurality of first and second refractive index films that are alternately stacked one on top of another repeatedly,
• wherein an array pitch of the plurality of structures in the underlayer is smaller than a wavelength of visible light.