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Proceedings Paper

The design of an ultra-thin and multiple channels optical receiving antenna system with freeform lenses
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Paper Abstract

Visible Light Communications (VLC) has become an emerging area of research since it can provide higher data transmission speed and wider bandwidth. The white LEDs are very important components of the VLC system, because it has the advantages of higher brightness, lower power consumption, and a longer lifetime. More importantly, their intensity and color are modulatable. Besides the light source, the optical antenna system also plays a very important role in the VLC system since it determines the optical gain, effective working area and transmission rate of the VLC system. In this paper, we propose to design an ultra-thin and multiple channels optical antenna system by tiling multiple off-axis lenses, each of which consists of two reflective and two refractive freeform surfaces. The tiling of multiple systems and detectors but with different band filters makes it possible to design a wavelength division multiplexing VLC system to highly improve the system capacity. The field of view of the designed antenna system is 30°, the entrance pupil diameter is 1.5mm, and the thickness of the system is under 4mm. The design methods are presented and the results are discussed in the last section of this paper. Besides the optical gain is analyzed and calculated. The antenna system can be tiled up to four channels but without the increase of thickness.

Paper Details

Date Published: 6 November 2014
PDF: 7 pages
Proc. SPIE 9272, Optical Design and Testing VI, 92721I (6 November 2014); doi: 10.1117/12.2073218
Show Author Affiliations
Lingyun Zhang, Beijing Institute of Technology (China)
Dewen Cheng, Beijing Institute of Technology (China)
Yuan Hu, Beijing Institute of Technology (China)
Weitao Song, Beijing Institute of Technology (China)
Yongtian Wang, Beijing Institute of Technology (China)

Published in SPIE Proceedings Vol. 9272:
Optical Design and Testing VI
Yongtian Wang; Chunlei Du; José Sasián; Kimio Tatsuno, Editor(s)

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