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

小行星9360173 本研究旨在验证测量精度和微弧度 二维应力光学扫描仪的分辨率。 在药品生产中，工件和包装都太小，无法使用传统的条形码。 特别重要的是使用自动识别来验证药品标签的正确性。 贴错标签一直是一个持续的安全问题，标签生产线受到严格的监管和检查。 半导体晶圆、半导体制造商 芯片和印刷电路板由于缺乏用于需要编码的数据量的空间而转向二维码。 阅读二维码的最可靠、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，利用光弹性材料中的施加应力，最适合于小光束和通过相对小的扫描角进行快速、精确的扫描。 压力可以在某些玻璃中产生如此大的折射率变化 比电光材料中的电场更强。 响应速率可以达到兆赫。 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，光学玻璃通常更坚固，环境稳定，成本低于其他方法中使用的材料。 基本的应力-光学夹层的可制造性是直接的，并且这将使其比电光等效器件便宜得多。 最后两个优点是 被认为在矩阵代码阅读器市场中非常重要。

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.