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.

Date Published: 1 May 2017
PDF: 9 pages
Proc. SPIE 10220, Dimensional Optical Metrology and Inspection for Practical Applications VI, 102200F (1 May 2017); doi: 10.1117/12.2262489

Published in SPIE Proceedings Vol. 10220:
Dimensional Optical Metrology and Inspection for Practical Applications VI
Kevin G. Harding; Song Zhang, Editor(s)