  A speckle correlation based optical lever (SC-OptLev) is constructed for the
measurement of small changes in the angle of orientation of a surface. The
dynamic range of SC-OptLev is found to be twice that of a conventional OptLev
for the same experimental configurations. Different filtering mechanisms are
implemented and the correlation results are compared. Two types of computer
automated SC-OptLevs, open source based computing system with a low-cost image
sensor and a commercial computing system, are presented with assistive
computational modules.
