Design, characterization, and fabrication of 90-degree viewing angle catadioptric retroreflector floating device using in 3D floating light-field display system.

A novel catadioptric retroreflector floating device (CRA) used in the 3D floating light-field system is proposed. The floating light-field image constructed by the CRA is aberration-suppressed. The luminance and the contrast of the image are substantially improved in a 90-degree viewing angle. The CRA is constituted of the designed catadioptric retroreflector (CR). The CR consists of three lenses, the first and the second lens is to refract the light, and the rear surface of the third lens is coated with reflective coating in order to reflect the incident light. The CRA is processable and the fabrication process using UV embossing is also described. A spectrophotometer is utilized to measure the retroreflective efficiency of the CRA. The average retroreflective efficiency of the CRA is 80.1%. A beam quality analyzer is utilized to measure the beam spot quality of the CRA, and the image quality can satisfy the requirements of human eye observation. In the experiment, compared to the floating light-field image constructed by the micro-beads type retroreflector floating device (MRA), the image quality of the floating light-field image constructed by the CRA is significantly enhanced. In the quantitative computer simulation, the PSNR values of the images are increased from 23.0185 to 32.1958.