Patent ID: 8125874

Claim:
An optical pickup device in which light is emitted as an outward light to an optical disk and the light reflected from the optical disk is received as a return light by a light receiving element, the device comprising: a first light source configured to emit a linearly polarized first light; a second light source configured to emit a linearly polarized second light with a wavelength shorter than that of the first light; a first objective lens configured to focus the first light onto the optical disk; a second objective lens configured to focus the second light onto the optical disk; and a dichroic mirror configured to partially reflect the first light therefrom and partially transmit the same therethrough, and substantially entirely transmit therethrough the return light of the second light, the dichroic mirror being provided between the first light source and the first objective lens, wherein the dichroic mirror is formed such that a product of its reflectance of the outward light of the first light and its transmittance of the return light of the first light is 20% or more to 25% or less, and the light receiving element receives the return light of the first light and the return light of the second light transmitted through the dichroic mirror.