System of computing surface reconstruction, in-plane and out-of-plane displacements and strain distribution

A system of computing surface reconstruction, in-plane and out-of-plane displacements, and strain distribution, the system comprising:

• a light source;
• a first objective lens, set at one side of the light source, wherein the light emitted by the light source passes through the first objective lens;
• a pinhole element, set at a focus location outside the first objective lens along the light emitting direction;
• a set of lens, located outside the pinhole element along the light emitting direction, wherein an optical center of the lens is on the same center axis as the optical center of the first objective lens;
• a beam splitter, located outside the lens along the light emitting direction, wherein an optical center of the beam splitter and that of the lens are on the same center axis, wherein the beam splitter is used to split the incident light provided by the lens into a first split beam and a second split beam and, the second split beam being reflected vertically and emitted through a second light emitting side, and the first split beam passing through the beam splitter and being emitted through a first light emitting side of the beam splitter;
• a second objective lens, located outside a second light emitting side of the beam splitter, wherein the second split beam from the beam splitter passes through an optical center of the second objective lens, and the second objective lens is movably positioned along the optical center axis of the second objective lens through a movable platform;
• an optical switching element, located outside the first light emitting side of the beam splitter, wherein the turns on/turns off action of the optical switching element determines whether the first split beam from the beam splitter pass through the optical switching element or not;
• a third lens, set outside the optical switching element along the light emitting direction, wherein the first split beam passes through an optical center of the third objective lens, and the third objective lens is movably positioned through the movable platform along the optical center axis of the third objective lens;
• a reflective element, set outside the third objective lens along the light emitting direction, wherein the reflective element is movably positioned along the optical center axis of the third objective lens through the movable platform and a displacement actuator, so that the focus location outside the third objective lens along the light emitting direction is set on an optical center of the reflective element;
• a receiving device, set outside the beam splitter, wherein the optical center of the receiving device is on the same center axis as the optical center of the second objective lens, and wherein
• when the optical switching element turns off, the light which forms by reflecting the second split beam by the second objective lens travels to the receiving device through the split beam, so that the receiving device is able to receive a plurality of test images;
• and
• when the optical switching element turns on, the light which forms by reflecting the second split beam by the second objective lens interferes in the beam splitter with the light which forms by reflecting the first split beam by the third objective lens, the interfered light then passing through the beam splitter to the receiving device so that the receiving device receives multiple of images with interference waves;
• and
• a control computing device, electrically connected to the movable platform, the displacement actuator, the stress applying element, the optical switching element and the receiving device, respectively.