Calibrating Lateral-Effect Photodiodes for Use as Measuring Devices inManufacturing

摘要

Lateral-effect photodiodes can be used as precision imaging sensors if theirnonlinearity, as well as any distortion introduced by an optical system, is accounted for by a calibration procedure. Accuracies of 1 part in 1000, measured with respect to the field of view, are possible using commercially available sensors, camera bodies, and closed-circuit television lenses. Sensors that fall into this class of accuracy can be used to sense position in various industrial applications. An advantage over traditional, scanned sensors is the potential for rapid measurement rates. (RRH)