Patent ID: 8928984
Filing Date: 2015-01-06
Classification: G02B

Abstract:
1. An image display apparatus comprising: an image forming device; an optical system; and an optical device on which a light is incident from the optical system, in which the light is guided, and from which the light is emitted, wherein the optical device includes a light guide plate, first deflecting means, and second deflecting means, wherein the light guide plate has the first deflecting means and the second deflecting means, wherein the following condition is satisfied: where an axial direction of the light guide plate is the Y-direction, a normal direction of the light guide plate is the X-direction, LH−1 (unit: mm) represents an effective length of the first deflecting means in the Y-direction, t represents the thickness of the light guide plate, and θ represents the incident angle of the light, which is totally reflected in the light guide plate, on an inner surface of the light guide plate.