Light separation device, blazed grating device, diffraction grating device, and illumination optical system

摘要: A thin and light optical device satisfactorily separates components having different properties. blazed grating is formed on a surface of flat-plate-shaped transparent substrate, separation coating that reflects or transmits incident according to the properties provided grating. The thus obtained offers function separating into reflected transmitted light, also has diffracting refracting separated light. As coating, polarization film, dichroic angle chiral nematic liquid crystal layer used separate linearly polarized planes, wavelengths, at angles incidence, circularly rotation directions.