Curved image sensors, not having to correct the field curvature, are considered a relevant solution for improving the vast majority of optical systems. They offer the possibility of designing compact aberration-free optical systems. In this work, we explain the advantage of the curved sensor system using the aberration theory. A complete procedure was developed to produce functional curved sensors and functional prototypes were carried out. This paper focuses on the tolerancing process of curved sensors and its inclusion in optical design. A compact objective prototype designed and produced demonstrates the advantage of curvature and the impact of tolerancing.

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