Optimization of lens shape for autostereoscopic display

Ping Su; Shu An; Jianshe Ma

doi:10.1117/12.2245004

31 October 2016 Optimization of lens shape for autostereoscopic display

Ping Su, Shu An, Jianshe Ma

Proceedings Volume 10022, Holography, Diffractive Optics, and Applications VII; 100220H (2016) https://doi.org/10.1117/12.2245004
Event: SPIE/COS Photonics Asia, 2016, Beijing, China

Abstract

The three-dimensional(3D) displays based on binocular parallax have drawn increasingly interests. The light splitting element, which presents separate images to the viewer’s left and right eyes, plays an important part in the auto-stereoscopic display. Lenticular lenses are widely used as the light splitting elements. However, the crosstalk resulted from the unsatisfied splitting may reduce the 3D experience.

It was determined that the most suitable cross sectional shape for lenticular lenses is elliptical. Firstly, the formula of the surface is derived based on the ellipse expression and the requirement of the 3D display system, that is y²+0.5651x² − 303.4768=0. Secondly, one axial source and 4 off-axial sources placed at the heights of 2.5mm, 5mm, 7.5mm and 8mm are used to analyze the beam splitting quality of the cylindrical and elliptical lens element, respectively. The spot of elliptical lens is smaller which means a better beam splitting quality. Thirdly, Monte Carlo Non-Sequential Ray tracing algorithm is used to simulate the luminance distribution on the viewing plane, the narrower width of vertical stripes means that the aberration is suppressed. Finally, the shape of elliptical can reduce the processing difficulty with the 10μm minimum step width. In a word, the optimization of the surface has a significant effect on the improvement of stereoscopic depth and the reduction of ghost images.

Citation Download Citation

Ping Su, Shu An, and Jianshe Ma "Optimization of lens shape for autostereoscopic display", Proc. SPIE 10022, Holography, Diffractive Optics, and Applications VII, 100220H (31 October 2016); https://doi.org/10.1117/12.2245004

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