A system for writing an optical code within or on a fiber substrate. The system includes a holding device that has a plurality of supports spaced apart from each other. The fiber substrate is wound about the supports such that the fiber substrate forms at least one flat section extending between adjacent...http://www.google.com.tw/patents/US7898735?utm_source=gb-gplus-share專利 US7898735 - Methods and systems for writing an optical code within or on a fiber substrate
