Light field painting is a new display technology, whose principle is to record the direction and intensity of light in the three-dimensional space to generate three-dimensional images under the variable view point. Through special display screens and algorithms, light field display technology can present images with depth and three-dimensional sense at different angles, so that the audience can feel the realistic three-dimensional effect without wearing any auxiliary equipment. The emergence of this technology provides a more realistic and immersive visual experience for industries such as film and advertising, as well as practical fields such as medical care and education. Optical field display is the acquisition and processing of optical field data. First of all, we need to use a special light field camera to shoot the object and get the information of the light dispersion distribution of the object in three-dimensional space. Then, the 3D image of the object is obtained by processing and analyzing the light field data through computer vision technology. The three-dimensional image is presented by the light field display. The light field display is characterized by its ability to provide a true three-dimensional effect, and the viewer can view the image at different angles, with a greater sense of immersion and realism. At the same time, the light field display also has the characteristics of high resolution and high color reproduction, which can provide more delicate and realistic image effects.