Optical-Digital Integrated Design Method for Near-Eye Display Imaging System

• Published in: IEEE access Vol. 10; pp. 50314 - 50322
• Main Authors: Sun, Lin, Cui, Qingfeng
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Aberration; Adaptive optics; Algorithms; computational imaging; Design techniques; Digital imaging; Displays; Field of view; Free form; near eye display; Optical design; Optical diffraction; Optical distortion; Optical imaging; Optical reflection; Optical refraction; Optical waveguides; point spread function (PSF); Point spread functions; Pupils; Reflectors
• ISSN: 2169-3536; 2169-3536
• DOI: 10.1109/ACCESS.2022.3173637

Near-eye display (NED) systems have various structures, including the freeform prism, off-axis synthesizer, and holographic optical waveguide structures. In this study, the three types of structures of NED systems were analyzed in terms of their advantages and disadvantages. Hence, an optical-digital integrated design method was proposed for the NED imaging system. In particular, a point spread function model with aberration information was developed based on the analysis of optical system aberration. Algorithm preprocessing was conducted on the image-end, and the processed image was transformed into a sharp image by the optical system and sent to the pupil. A NED optical system with a <inline-formula> <tex-math notation="LaTeX">45^{\circ } \times32 </tex-math></inline-formula>° field of view, 10-mm exit pupil diameter, and 30-mm exit pupil distance was developed using the proposed method. This system can meet the NED requirements using three aspherical reflectors instead of a free-form and lens-correction group.