Investigation of extracting information from vibrating objects by digital speckle correlation

The paper presents results of studying the quality of extracting information from vibrating objects. A capability of getting information from vibrating objects situated at an arbitrary angle to the observer is investigated. Reliable extracting information from the test object situated within an angle of +/- 50 degrees relative to the plane perpendicular to an observer is demonstrated. A possibility of using a single lens in order to vary the laser beam diameter for applying in the tasks of extracting information from vibrating objects is also considered.