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首页> 外文会议>Novel Optical Systems Design and Optimization X; Proceedings of SPIE-The International Society for Optical Engineering; vol.6668 >Design issues for semi-passive optical communication devices
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Design issues for semi-passive optical communication devices

机译：半无源光通信设备的设计问题

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摘要

Optical smart cards are devices containing a retro-reflector, light modulator, and some computing and data storage capabilities to affect semi-passive communication. They do not produce light; instead they modulate and send back light received from a stationary unit. These devices can replace contact-based smart cards as well as RF based ones for applications ranging from identification to transmitting and validating data. Since their transmission is essentially focused on the receiving unit, they are harder to eavesdrop than RF devices, yet need no physical contact or alignment. In this paper we explore optical design issues of these devices and estimate their optical behavior. Specifically, we analyze how these compact devices can be optimized for selected application profiles. Some of the key parameters addressed are effective light efficiency (how much modulated signal can be received by the stationary unit given the amount of light it transmits), range of tilt angles (angle between device surface normal to the line connecting the optical smart card with the stationary unit) through which the device would be effective, and power requirements of the semi-passive unit. In addition, issues concerning compact packaging of this device are discussed. Finally, results of the analysis are employed to produce a comparison of achievable capabilities of these optical smart cards, as opposed to alternative devices, and discuss potential applications were they can be best utilized.
机译：光学智能卡是包含后向反射器，光调制器以及一些影响半被动通信的计算和数据存储功能的设备。它们不发光。相反，它们调制并发送从固定单元接收的光。这些设备可以代替基于接触的智能卡以及基于RF的智能卡，用于从识别到传输和验证数据的各种应用。由于它们的传输本质上是集中在接收单元上，因此它们比RF设备更难于窃听，但无需物理接触或对准。在本文中，我们探讨了这些设备的光学设计问题，并估计了它们的光学性能。具体来说，我们分析如何针对选定的应用程序配置文件优化这些紧凑型设备。所解决的一些关键参数包括有效光效率（给定固定单元发送的光量，固定单元可以接收多少调制信号），倾斜角度范围（与光学智能卡连接的设备表面垂直的设备表面之间的角度）。固定装置），设备将通过该装置有效，以及半无源装置的功率要求。另外，讨论了与该装置的紧凑包装有关的问题。最后，采用分析结果对这些光学智能卡（与其他设备相比）的可实现功能进行比较，并讨论了可以最佳利用它们的潜在应用。

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