Optical assembly for augmented reality or virtual reality display

An optical assembly is disclosed in which two input pupils (52, 54) of light are projected onto an input grating (4). The input pupils (52, 54) may be overlapping or non-overlapping. The input grating (4) is configured to receive input pupils (52, 54) and to diffract them such that the input pupils are coupled towards the output element (6) in parallel directions laterally spaced apart from each other. The input pupils (52, 54) may be received at a first portion (12) and a second portion (14) of the output element (6) on either side of the demarcation line (13), respectively. The input pupils (52, 54) are received at positions symmetrically shifted with respect to the demarcation line (13). The first portion (12) and the second portion (14) are mirrored to each other and each can expand light from a respective input pupil (52, 54) in an equal and opposite manner. 公开了一种光学组件，在该光学组件中，光的两个输入光瞳(52，54)被投影到输入光栅(4)上。输入光瞳(52，54)可以是交叠的或非交叠的。输入光栅(4)被配置成接收输入光瞳(52，54)并且被配置成使其衍射，使得输入光瞳沿彼此横向间隔开的平行方向朝向输出元件(6)耦合。输入光瞳(52，54)可以