Patent ID: 9696557
Date: 2017-07-04
CPC Classifications: G02B

Claim:
1. An optical device, comprising: a first optical element having a first surface and a second surface, a first light emitted by a display being incident on the first surface, the first optical element including a plurality of transmissive portions and a plurality of non-transmissive portions, each of the transmissive portions extending in a first direction parallel to the first surface, the non-transmissive portions being respectively disposed in regions between the transmissive portions, a light transmittance of the non-transmissive portions being lower than a light transmittance of the transmissive portions; and a second optical element, a second light emitted from the second surface being incident on the second optical element, the second optical element emitting a third light by condensing the second light, an optical axis of the third light being tilted with respect to an optical axis of the second light in a plane parallel to the first direction, wherein the second optical element has a third surface and a fourth surface, the second light being incident on the third surface, the second optical element includes a plurality of protruding portions provided on one or both of the third surface and the fourth surface, each of the protruding portions has an arc shape when projected onto the third surface, an optical center of the second optical element is separated from a center of the first optical element in the first direction in a plane parallel to the first surface, the second optical element emits the third light toward a third optical element provided to be tilted with respect to the first surface, the third optical element has a fifth surface and a sixth surface, the third light is reflected by the fifth surface, and light including a background image is incident on the sixth surface, passes through the third optical element, is emitted from the fifth surface, and travels toward a viewer of the display.