  This Paper introduces a new Non-Contact, Optical method for displacement
measurements, and strain mapping as well as comparing it to traditional Digital
Image correlation (DIC) and laser interferometry measurement method. This
Method incorporates diffracted laser speckle images from the surfaces through
DIC to track displacement and locate strain values. In order to evaluate the
feasibility of the method, various experiments were done and results were
compared to laser interferometry based and traditional DIC. All the experiments
were designed and done with affordable equipment, while they resulted in
displacement as small as 30 micro-meter detection. Results presented by this
paper are showing that DilSIC is an economic, accurate, rapid and applicable
method for the mentioned purpose. Since it does not require any artifact
speckle pattern, it can be used on the non-accessible area, limits and
difficulties for creating speckle pattern is not applicable for this technique.
In this research, various magnitude of strains have been examined within the
range of [0-10%]. As this technique is a hybrid method of DIC and Laser speckle
measurement it could eliminate some of the limits that everyone has. Those
removed restrictions include but not limited to being able to measure strain
within range of [0-10%] while using fringes on laser speckle does not let the
measurement exceed 2%. Also using laser speckle pattern can end all the
challenges to achieve the qualified speckle pattern as they can be adjusted to
match the requirement easily.
