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

用于计算机集成柔性制造的二维微矩阵读码器

• 批准号: 9360173
• 负责人: George Seaver
• 金额: $ 6.49万
• 依托单位: Seaver (SeaLite) Engineering
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-01-15 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9360173&HistoricalAwards=false
• 关键词: Micro; Matrix; Code; Reader; Computer

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.

9360173 Seaver 这项研究旨在展示二维应力光学扫描仪的准确性和微弧度分辨率。 在药品生产中，工件和包装对于传统条形码来说都太小。 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存在的安全问题，贴标生产线受到严格监管和检查。 由于缺乏空间容纳需要编码的数据量，半导体晶圆、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；在各种可用的应力光学技术中，利用光弹性材料中的外加应力，最适合小光束以及通过相对较小的扫角进行快速、精确的扫描。 应力在某些玻璃中产生的折射率变化比电场在电光材料中产生的折射率变化还要大。 响应率可以达到兆赫兹。 此外，对光学玻璃施加应力不会增加其本来就低的损耗，并且响应是非色散的。 最后，光学玻璃通常比其他方法中使用的材料更坚固、对环境更稳定且成本更低。 基本应力光学夹层结构的可制造性是直接的，这将使其比电光等效设备便宜得多。 最后两个优点被认为在矩阵读码器市场中非常重要。