Abstract

Often the state or calibration of a measurement system is not known perfectly. The general concept of measurement diversity is the attempt to jointly estimate the state of the system and the object of the measurement by making multiple measurements while perturbing the state of the system in a known fashion. Phase diversity [1] is a well established example of measurement diversity. In phase diversity, the unknown phase aberrations and fine-resolution image are estimated from an in-focus and an intentionally defocused image. In this case the imaging system is perturbed by introducing a quadratic defocus term in the phase aberration.

© 1995 Optical Society of America