有源加密型微光学标签系统的设计  

Design of micro-optical label system of active encryption

作　　者：林武[1] 梁忠诚[1] 张浩[1] 钱晨[1] 

机构地区：[1]南京邮电大学光电工程学院,江苏南京210003

出　　处：《物联网技术》2012年第3期25-28,共4页Internet of things technologies

基　　金：国家自然科学基金资助项目(60878037)

摘　　要：通过添加辅助光学元件,并采用OOK调制加密方式,给出了一种有源加密型微光学标签的光学系统设计方法。该方法相比一般微光学标签系统,接收端采用了更为普及的手机相机,并具有标签加密等特性;同时根据手机相机镜头的参数,考虑了发射端透镜焦距和孔径的影响。由于在系统的加密发射端对手机相机镜头进行改进,故可使接收系统满足Bokode标签原理。结果表明:该标签系统具有防伪加密功能,能够利用普通手机相机在不低于15cm距离的条件下准确探测和解码。A micro-optical label system of active encryption through adding the auxiliary optical components is introduced. The system applied the modulation of OOK. Unlike common micro-optical system, the optical label must be read with the camera out of focus. The new system receiver is phone camera which is more widespread, and the tag with function of encryption. The transmitting terminal was designed. The camera lens was improved according to focal length and aperture. Allowing the receiving system to meet Bokode label principle. Taking the parameters of camera lens into account. The results show that the tag can be captured by ordinary phone camera from the distance of not less than 15 cm. The image is able to be decoded accurately. The system is more practical than before.

关 键 词：微光学标签 手机相机 OOK调制 Bokode标签原理 

分 类 号：TF123[冶金工程—粉末冶金]