A full-color compact 3D see-through near-eye display system based on complex amplitude modulation

Author(s):

Zhang, Zhiqi; Liu, Juan; Gao, Qiankun; Duan, Xinhui & Shi, Xueliang

Abstract:

“For complex amplitude modulation (CAM)-based three-dimensional (3D) near-eye systems, it is a challenge to realize colorful 3D display by using spatial light modulator (SLM) and grating. Here, a full-color compact 3D see-through near-eye display (NED) system by CAM is proposed. Computer generated holograms (CGHs) for different wavelengths are calculated separately. Each CGH contains two position-shifted sub-holograms and the separated distance is carefully calibrated to eliminate chromatic aberration. Colorful 3D images are synthesized through time-multiplexing. Color managements are performed and chromatic aberration of the system is analyzed to provide better colorful effect. The system structure is integrated to be compact and a prototype is implemented. Pre-compensation is added on CGHs to offset the system’s assembling errors. Optical experiment results show that the proposed system can provide good 3D full-color see-through performance without vergence-accommodation conflict (VAC). Dynamic colorful display ability is also tested, which shows good potential for interactive NED in the future.”

Link to Publications Page

Publication: Optics Express
Issue/Year: Optics Express, Volume 27; Number 5; Pages 7023; 2019
DOI: 10.1364/oe.27.007023

Multimaterial Manufacture Through Combining Optical Tweezers with Multiphoton Fabrication.

Author(s):

Askari, M.; Tuck, C. J.; Hu, Q.; Hague, R. J. M. & Wildman, R. D.

Abstract:

“Multi-Photon Polymerization (MPP) is a technique used to fabricate complex micro-scale 3D structures using ultra-short laser pulses. Typically, MPP is used to manufacture micron-scale components in photopolymer materials. However, the development of micron scale processes that can produce components from multiple materials within a single manufacturing step would be advantageous. This would allow the inclusion of particles that are manipulated and embedded within structures with sub-micron feature sizes.

To achieve this, an MPP system was combined with an optical trapping (OT) setup in order to independently manipulate microparticles in the x, y and z planes. Particles were transported into the fabrication site using the OT and encapsulated using the MPP laser. Here it is shown that combining the OT capabilities with an additive manufacturing technique enables the production of complex multi-material artifacts.”

Link to Publications Page

Publication: Journal of Laser Micro/Nanoengineering
Issue/Year: Journal of Laser Micro/Nanoengineering, Volume 14; Number 1; 2019
DOI: 10.2961/jlmn.2019.01.0014