Stationarity and Erogodicity

Book: Optical Imaging in Projection Microlithography

Author(s): Alfred K. K. Wong

Published: 2005

https://doi.org/10.1117/3.612961.ap2

Abstract

In computing time averages of optical fields, we regard the ensembles to be stationary and ergodic. Stationarity means that all ensemble averages are independent of the time origin; and ergodicity implies that each ensemble average is equal to the time average involving a typical member of the ensemble.