Polarization integrator

A polarization integrator including a polarizing beam splitter for splitting light from a light source into P-polarized light and S-polarized light, a first micro-lens, a ½-wave plate, and a second micro-lens, characterized in that:

• said first micro-lens is arranged to focus onto mutually differing positions the P-polarized light and S-polarized light split by said polarizing beam splitter;
• said ½-wave plate is arranged either in the position in which the P-polarized light or in which the S-polarized light is focused, and operates to convert either the P-polarized light or the S-polarized light into S-polarized light or P-polarized light;
• said second micro-lens operates to integrate either the S-polarized light or the P-polarized light having passed through said ½-wave plate and been polarization-converted, with either the S-polarized light or P-polarized light not having passed through said ½-wave plate;
• and
• at least one of said polarizing beam splitter, said first micro-lens, said ½-wave plate, and said second micro-lens is formed using a DLC film.