26 June 1996 System for the automatic inspection of image intensifier tubes
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Abstract
Objectivity, measurement accuracy and repeatability are compromised whenever the human vision system is involved in assessing the performance of optical and electro-optical components. One example of this is found in the inspection of image intensifier tubes (IITs). This paper discusses the use of an automated intensifier measurement system (AIMS), that was developed to overcome the drawbacks of the subjective evaluation methods currently in use. The AIMS offers significant improvement over visual inspection techniques typically performed by a human operator. The AIMS quantifies an IIT's performance in a number of categories including: resolution, geometric image distortion, output brightness uniformity (opaque and bright spots), and image format; measurement accuracy is traceable to NIST. Innovative image-processing techniques allow precise characterization of the entire IIT using an off-the-shelf CCD that can capture the complete intensified image without employing scanning or magnifying techniques. The system also performs a self test to ensure correct setup. Now for the first time, because all the necessary setup adjustments and measurements are performed under software control, all subjectivity is eliminated, allowing totally objective measurements to be made. System performance results are discussed.
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Mark A. Sartor, Mark A. Sartor, John W. Pecina, John W. Pecina, Carl Paul, Carl Paul, Bill Helms, Bill Helms, Dennis L. Alsman, Dennis L. Alsman, } "System for the automatic inspection of image intensifier tubes", Proc. SPIE 2753, Visual Information Processing V, (26 June 1996); doi: 10.1117/12.243584; https://doi.org/10.1117/12.243584
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