title: Heterodyne readout system for dual plate speckle photography: analysis of error sources and performance evaluation.
abstract: We describe the design, construction, and testing of a dual plate specklegram heterodyne readout system. The choice of the optical layout and mode of operation is based on the results of a detailed discussion on the sources of error associated both with optical noise and misalignments. Noise analysis includes the conventional scintillation noise and a recently described additional source, the speckle grain noise. Stability and reproducibility tests have been conducted and the accuracy of displacement measurement is 10(-6) of the recorded specklegram size, approximately five times worse than the ultimate noise limited value.
authors.forename: J S
authors.initials: JS
authors.lastname: Kim
authors.forename: S
authors.initials: S
authors.lastname: Musazzi
authors.forename: U
authors.initials: U
authors.lastname: Perini
authors.forename: M
authors.initials: M
authors.lastname: Giglio