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Proceedings Paper

Application of the microlens array in the projection of the laser scanning
Author(s): Lulu Wang; Min Li; Hai Tan; Peng Zhou; Yu Bai; Wenjiang Shen; Dongmin Wu
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Paper Abstract

A small exit-pupil restricts the application of the Retinal Scanning Display (RSD) in the intelligent head-mount display (HMD). In this paper, we use the microlens array to solve this problem. A new thermal reflow process was designed and a circular-type microlens array with 70% fill factor in the form of a hexagonal close-packed arrangement by melting photoresist was prepared. The aperture size of every lens is 14μm and the period is 16μm. The gap is filled by a metal film to reflect off the beam which will not be modulated by the microlens. This achieves a more uniform exit-pupil expansion. We study the effect of different defects of the microlens array on the pupil expansion. The result shows that the NA and expansion angle of the microlens array are 0.38 and 45°, respectively.

Paper Details

Date Published: 31 October 2016
PDF: 9 pages
Proc. SPIE 10022, Holography, Diffractive Optics, and Applications VII, 100222J (31 October 2016); doi: 10.1117/12.2245013
Show Author Affiliations
Lulu Wang, Xi’an Jiaotong Univ. (China)
Suzhou Institute of Nano-Tech and Nano-Bionics (China)
Min Li, Suzhou Institute of Nano-Tech and Nano-Bionics (China)
Hai Tan, Suzhou Institute of Nano-Tech and Nano-Bionics (China)
Peng Zhou, Suzhou Institute of Nano-Tech and Nano-Bionics (China)
Yu Bai, Xi'an Jiaotong Univ. (China)
Wenjiang Shen, Suzhou Institute of Nano-Tech and Nano-Bionics (China)
Dongmin Wu, Suzhou Institute of Nano-Tech and Nano-Bionics (China)


Published in SPIE Proceedings Vol. 10022:
Holography, Diffractive Optics, and Applications VII
Yunlong Sheng; Chongxiu Yu; Changhe Zhou, Editor(s)

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