Optical integration and signal processing algorithms for high resolution inspection of impression rollers

在工业印刷中，对精确控制和性能优化的要求越来越高 全世界的工业。在印刷过程中，工业打印机需要使用材料和耗材 该项目旨在解决这些问题。主要 目的是研制一种便携式的墨辊清洗过程控制仪 并优化溶剂的使用，以精确地清洁给定的陶瓷辊。在这个项目中 我们将优化一种基于干涉测量的专用仪器， 高轴向分辨率（1 µm）的不均匀性。该探头基于单模光纤，其上具有GRIN 附接透镜以用于在长景深上聚焦。利用宽带激光和旋转棱镜， 改变干涉仪参考臂长度（延迟线），系统能够成像10 mm以上的深度 微米分辨率。具体目标是：1）研制一种光电转换采集卡， USB 2通信，可用于采集高达10 Mhz的干涉测量信号，并以真实的方式发送数据 时间到了便携式电脑。2)为了优化光学干涉仪（包括延迟线）的设计， 包装. 3)开发信号采集链，以提高信噪比并生成鲁棒的 深度的措施。这项工作的一个直接成果将是制定一项改进的文书， 便携式并准备在现场进行测试。

There is an increasing demand for precise control and performance optimization in the industrial printing industry worldwide. During the process of printing, industrial printers require using materials and consumables based on pigmented inks that generate significant pollution.This project aims to address these issues. The main objective is to develop a portable instrument that can be used to fully control the cleaning process of ink rollers and to optimize the use of solvents to what is precisely needed to clean a given ceramic roller. In this project we will optimize a dedicated instrument based on interferometry that can measure surfaces with height inhomogeneity with high axial resolution (1 µm). The probe is based on a monomode fiber on which a GRIN lens is attached for focussing over a long depth of view. Using a wide bandwith laser and a rotating prism to vary the interferometer reference arm length (delay line), the system is able to image upwards 10mm depth with micron resolution. The specific objectives are: 1) To develop an optical-to-electrical acquisition card with USB2 communication that can be used to acquire interferometry signals at up to 10Mhz and send data in real time to a portable computer. 2) To optimize the optical interferometer (including the delay line) design and packaging. 3) To develop a signal acquisition chain to increase signal to noise ratio and generate robust measures of depth. A direct outcome of this work will be the development of an improved instrument that is portable and ready for tests in the field.