Optical Device And Electronic Device

Abstract

A thin optical device having high light utilization efficiency and less chromatic aberration and a small electronic device including the optical device are provided. The thin optical device includes a first reflective polarizing plate, a lens, an optical rotator, a retardation plate, and a second reflective polarizing plate. The optical device can be a thin optical device by rotation of the polarization plane of linearly polarized light with the optical rotator and utilization of a property of selectively reflecting circularly polarized light of the second reflective polarizing plate. Furthermore, the optical device does not use a half mirror and thus has a property of high light utilization efficiency. When the second reflective polarizing plate has a layered structure, chromatic aberration of an optical system can be reduced.

Dependencies are inferred from the claim text.