Abstract
Curved integral imaging 3D display could provide enhanced 3D sense of immersion and wider viewing angle, and is gaining increasing interest among discerning users. In this work, large scale microlens arrays (MLAs) on flexible PMMA substrate were achieved based on screen printing method. Meanwhile, an inverted reflowing configuration as well as optimization of UV resin’s viscosity and substrate’s surface wettability were implemented to improved the numerical aperture (NA) of microlenses. The results showed that the NA values of MLAs could be increased effectively by adopting inverted reflowing manner with appropriate reflowing time. With decreasing the substrate’s wettability, the NA values could be increased from 0.036 to 0.096, when the UV resin contact angles increased from 60.1° to 88.7°. For demonstration, the fabricated MLAs was combined to a curved 2D monitor to realize a 31-inch curved integral imaging 3D display system, exhibiting wider viewing angle than flat integral imaging 3D display system.
Highlights
Curved integral imaging 3D display could provide enhanced 3D sense of immersion and wider viewing angle, and is gaining increasing interest among discerning users
When the printed micro-cylinder arrays (MCAs) were flipped within short time (e.g., 1 min), the height of micro-lens arrays (MLAs) at the vertex increased significantly and the diameter of MLAs shrinked obviously, indicating that the gravity played an important role in the formation of lens profile at the early stage
Large scale flexible micro-lens arrays (MLAs) were successfully fabricated on polymethyl methacrylate (PMMA) substrate based on screen printing technique
Summary
Curved integral imaging 3D display could provide enhanced 3D sense of immersion and wider viewing angle, and is gaining increasing interest among discerning users. Integral imaging is an autostereoscopic and multiscopic 3D display technology that uses double micro-lens arrays (MLAs) to capture and reproduce a light field of the target based on reversibility principle of light r ays[5]. It is regarded as a promising approach to realize the 3D display system due to its typical characteristics, such as glasses free, full parallax, quasi-continuous view points, eliminating visual fatigue and real 3D display. What’s more, screen printing technology takes advantage of surface tension of UV resin to form spherically shaped microlenses with smooth profiles. This surface-tension-assisted manner could be exploited to further control the profiles of microlenses[32]
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