Augmented reality device and exposure device

An augmented reality (AR) device, comprising a first projection assembly and a first display assembly;

• wherein
• the first display assembly is disposed on a light exit side of the first projection assembly;
• the first projection assembly comprises a first scanner, a first laser, and a first lens group, wherein the first scanner is disposed on a light exit side of the first laser, and the first scanner is configured to reflect laser beams projected by the first laser and corresponding to all pixels of a three-dimensional image one by one through rotating mechanical movement to a first holographic diffraction grating, and the first lens group is disposed on a light incident side and/or a light exit side of the first scanner;
• and
• the first display assembly comprises the first holographic diffraction grating and a first lens, wherein the first holographic diffraction grating is disposed on a surface, facing towards the first scanner, of the first lens and is configured to further reflect the laser beams reflected by the first scanner, so that a user of the AR device is capable of perceiving the reproduced three-dimensional image by using the first projection assembly and the first display assembly and at the same time to observe a real world scene by using the first lens, and the first lens group comprises at least one first spherical lens and/or at least one first aspheric lens.