Coordinate transformation of three-dimensional image in integral imaging system illuminated by a point light source

Abstract The point light source is an important kind of directional light source. By using directional illumination, the performances of the integral imaging system will be enhanced. In this paper, the coordinate transformation characteristics of integral imaging systems illuminated by a point light source have been explored in detail. By using a dynamic point light source such as a moving light emitting diode to illuminate the imaging system, the position and size of the rendered three-dimensional image can be transformed in real time without updating the elemental images, and the depth of field of the imaging system is doubled. The coordinates of the three-dimensional image are changed with the distance between the point light source and the micro-lens array. The optical mechanism of the three-dimensional dynamic imaging phenomenon is analyzed. The coordinate transformation rules of the three-dimensional image are deduced and verified by experiments. The phenomenon may find potential applications in interactively three-dimensional display or augmented reality system.