Rotational Offset Microlens Arrays for Highly Efficient Structured Pattern Projection

• DOI: 10.1002/adom.202000395
• Publication Date: 2020-05-25T10:35:14Z
• Authors: Sung‐Pyo Yang; Jae‐Beom Kim; Yeong‐Hyeon Seo; Ki‐Hun Jeong
• Keywords: Microlens; Integral Imaging

Abstract This article reports the diffractive optical elements of rotational offset microlens arrays for generating highly efficient structured light patterns in active stereoscopic 3D imaging. The double‐side configuration increases uniformity diffraction by using two successive refractions on surfaces. In addition, offsets between frontside and backside with rectangular or hexagonal arrangements control contrast density dot array patterns. Two layers high curvature fill‐factor are microfabricated both sides glass wafer ultrathin fluorocarbon encapsulation, thermal reflow, parylene gap filling. angles 22.5°, 28°, 37° 13.25°, 21.75°, 27.75° efficiently provide uniformity, contrast, minimizing overlapping stereo imaging successfully acquire high‐resolution depth map plaster objects smooth curved pattern projection will promising opportunities compact advanced systems industrial, medical, military applications.