2-D Micro-Matrix Code Reader for Computer-Integrated Flexible Manufacturing

9360173 Seaver本研究旨在演示二维应力光学扫描仪的精度和微弧度分辨率。在药品生产中，对于传统的条形码来说，工件和包装都太小了。特别重要的是使用自动识别来验证药品的正确标签。贴错标签一直是一个长期存在的安全问题，贴标签生产线受到严格的监管和检查。由于需要编码的数据量缺乏空间，半导体晶片、半导体芯片和印刷电路板的生产商正在转向二维码。读取二维码最可靠、最准确和最快的技术是固态扫描方法；在各种可用的技术中，应力光学使用光弹性材料中的外加应力，最适合于小束和通过相对较小的扫描角进行快速、精确的扫描。在某些玻璃中，应力可以产生比电光材料中的电场更大的折射率变化。而响应率高达兆赫也是可能的。此外，对光学玻璃施加应力不会增加其已经很低的损耗，并且响应是非色散的。最后，光学眼镜通常比其他方法使用的材料更坚固，环境更稳定，成本更低。基本应力光学夹层的可制造性很简单，这将使其比光电等效器件便宜得多。这后两个优势被认为在矩阵代码读取器市场上非常重要。

9360173 Seaver This research is to demonstrate the accuracy and micro-radian resolution of a two-dimensional stress-optic scanner. In the production of Pharmaceuticals, both the workpiece and the packaging are too small for conventional bar codes. Of particular importance is the use of Automatic Identification to verify the correct labeling of Pharmaceuticals. Mislabeling has been a persistent safety problem and labeling production lines are closely regulated and inspected. Producers of semiconductor wafers, semiconductor chips, and printed circuit boards are shifting to two-dimensional codes due to lack of space for the amount of data that needs to be encoded. The most reliable, accurate and fastest technique for reading two-dimensional codes would be a solid-state scanning approach; of the various techniques available stress-optics, using an imposed stress in photoelastic materials, is the best for small beams and fast, precise scanning through relatively small sweep angles. Stress can produce a such greater index change in some glasses than can an electric field in electro-optical materials. And response rates up to megahertz are possible. Also, the imposition of a stress to optical glass does not increase its already low-loss, and the response is non-dispersive. Finally, optical glasses are generally more rugged and environmentally stable and cost less than do the materials used in other approaches. The manufacturability of the basic stress-optics sandwich is straight forward and this would make it significantly cheaper than electro- optical equivalent devices. These last two advantages are considered to be very important in the matrix code reader market.