Patent ID: 7562984

Claim:
A polarizing beam splitter comprising: a multilayer film formed by alternately laminating a plurality of H layers and a plurality of L layers having a relatively lower refractive index than a refractive index of the H layers; an incident-side optical member which is disposed on one side of the multilayer film; and an emergence-side optical member which is disposed on another side of the multilayer film, wherein transmittance of s-polarized light is higher than that of p-polarized light by 60% or higher of the transmittance of the p-polarized light in a first wavelength band having a bandwidth equal to or larger than 30 nm in a visible region, and transmittance of p-polarized light is higher than that of s-polarized light by 60% or higher of the transmittance of the s-polarized light in a second wavelength band different from the first wavelength band in the visible region.