Abstract: An augmented reality display device (100), comprising: a light engine (102) for emitting image light; and at least one layer of optical waveguide lens (101) comprising an in-coupling grating region (1012), an optical waveguide substrate (1011) and a turning and out-coupling grating region (1013), wherein the in-coupling grating region (1012) is disposed on a first optical surface of the optical waveguide substrate (1011); the optical waveguide substrate (1011) is configured to transmit the image light through total reflection; the turning and out-coupling grating region (1013) is disposed on the first optical surface of the optical waveguide substrate (1011) for receiving totally reflected light and coupling it out; and a sum of the in-coupling grating vector and the turning and out-coupling grating vectors is not zero, wherein the in-coupling angles of the light engine (102) and the respective layers of optical waveguide lenses (101) are identical.