Abstract: A non-contact method is presented for measuring vibrations on a highly reflective surface of an object. The method includes: projecting focused light towards an area of interest on a surface of an object; receiving the light reflected by the area of interest on an image capture screen, where the image capture screen is configured to diffuse the light incident thereon; capturing an image of the light on the image capture screen using a detector; determining change in position of the image on the detector over time; and calculating a series of changes in the surface angle and a series of vertical displacements of the surface from the change in position of the image and using triangulation.

Abstract: A non-contact method is presented for measuring vibration on a surface of an object. The method includes: projecting light from three light sources towards a point of interest on a surface of an object, and detecting the light reflected by the point of interest on the surface using three detectors, where each detector of the three detectors captures light from a corresponding one of the three light sources. From the light captured, calculating vertical displacement of the surface at the point of interest using triangulation, calculating rotational displacement of the surface at the point of interest about an x axis using triangulation; and calculating rotational displacement of the surface at the point of interest about y axis using triangulation, where the x axis and the y axis define a plane which is parallel to surface of the object.

Abstract: A non-contact method is presented for measuring vibration on a surface of an object. The method includes: projecting light from one or more light sources towards an area of interest on a surface of an object; detecting the light diffusely reflected by the surface of the object using one or more detectors; determining a change in position of the reflected light detected by the detector over time; for the at least one point on the surface of the object, calculating a series of measurements of vertical displacement of the surface over a period of time from the change in position of the reflected light and using triangulation; and determining frequency of a disturbance of the surface at the at least one point on the surface and an amplitude of the disturbance using the series of measurements of vertical displacement.

Abstract: A non-contact method is presented for measuring vibration on a surface of an object. The method includes: projecting light from three light sources towards a point of interest on a surface of an object, and detecting the light reflected by the point of interest on the surface using three detectors, where each detector of the three detectors captures light from a corresponding one of the three light sources. From the light captured, calculating vertical displacement of the surface at the point of interest using triangulation, calculating rotational displacement of the surface at the point of interest about an x axis using triangulation; and calculating rotational displacement of the surface at the point of interest about y axis using triangulation, where the x axis and the y axis define a plane which is parallel to surface of the object.