Patent ID: 7153017
Filing Date: 2006-12-26
Classification: G02B

Abstract:
1. A light deflector comprising a light entrance surface on which light is incident and a light exit surface located on an opposite side relative to said light entrance surface and allowing the incident light to exit therefrom, wherein said light entrance surface is formed with a plurality of elongated prisms arrayed substantially parallel to each other and each composed of two prism surfaces, at least one of said prism surfaces of each of the elongated prisms comprises at least two flat surfaces having mutually different inclination angles, any one of said flat surfaces located on a side closer to said light exit surface has a larger inclination angle, and a difference between the inclination angle of one of said flat surfaces closest to said light exit surface and the inclination angle of the other one of said flat surfaces farthest from said light exit surface is 15 degrees or less.