From Event: SPIE Optical Engineering + Applications, 2017
Industrial optical inspection often requires high speed and high throughput of materials. Engineers use a variety of techniques to handle these inspection needs. Some examples include line scan cameras, high speed multi-spectral and laser-based systems. High-volume manufacturing presents different challenges for inspection engineers. For example, manufacturers produce some components in quantities of millions per month, per week or even per day. Quality control of so many parts requires creativity to achieve the measurement needs. At times, traditional vision systems lack the contrast to provide the data required. In this paper, we show how dynamic polarization imaging captures high contrast images. These images are useful for engineers to perform inspection tasks in some cases where optical contrast is low. We will cover basic theory of polarization. We show how to exploit polarization as a contrast enhancement technique. We also show results of modeling for a polarization inspection application. Specifically, we explore polarization techniques for inspection of adhesives on glass.
Matthew J. Novak, "Application of polarization in high speed, high contrast inspection," Proc. SPIE 10373, Applied Optical Metrology II, 1037307 (Presented at SPIE Optical Engineering + Applications: August 08, 2017; Published: 23 August 2017); https://doi.org/10.1117/12.2275843.
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