From Event: SPIE Commercial + Scientific Sensing and Imaging, 2017
It is possible to use of 3D lateral and longitudinal static speckle fields to determine the location of the optical axis in a system. In this manuscript we examine a variation of this idea where we use the 3D temporal correlation properties of multiple speckle fields to determine the axis. Previously it was shown how a spatial averaging approach could be used to estimate the 3D speckle orientation, here we compare the characteristics of this spatial averaging technique to a temporal averaging approach (where multiple speckle fields are used to produce an ensemble), experimental results are compared with the theoretical predictions and we present some conclusions.
Florian Schurig and Damien P. Kelly, "Temporal speckle correlations for optical alignment," Proc. SPIE 10220, Dimensional Optical Metrology and Inspection for Practical Applications VI, 102200F (Presented at SPIE Commercial + Scientific Sensing and Imaging: April 13, 2017; Published: 1 May 2017); https://doi.org/10.1117/12.2262489.
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