This paper analyzes the drawbacks of existing augmented reality devices and introduces the principle of integral imaging 3D display technology. The principles of several optical see-through augmented reality devices and systems based on integral imaging 3D display are reviewed, and the characteristics of the augmented reality technologies including off-axis optics, freeform optics, holographic optical element, and double 4f system are expounded respectively.

augmented reality  /  three-dimensional display  /  integral imaging