Patent ID: 8868356

Claim:
An optical signal processing system comprising: a processor; a memory; a receiving module to receive in real time input from multiple channels of OCT (Optical Coherence Tomography) in the form of interfering optical signals representing multiple measured distances measured between a plurality of optical fibers and a target imaging object, the interfering optical signals being produced from the optical fibers and the target imaging object; a Fast Fourier Transform (FFT) module to apply FFT on the interfering optical signals in real time to produce Fourier frequencies corresponding to the multiple measured distances; and a calculation module to calculate in real time multiple force components of a force applied on the target imaging object to cause at least some of the multiple measured distances measured between the plurality of optical fibers and the target imaging object based on the Fourier frequencies from the FFT module, the Fourier frequencies corresponding to the multiple measured distances measured between the plurality of optical fibers and the target imaging object; wherein the calculation module is configured to calculate three force components that cause three displacements which correspond to three of the measured distances represented by the interfering optical signals, the three force components representing amplitude and direction of the force applied on the target imaging object; and wherein the receiving module, the Fast Fourier Transform module, and the calculation module are stored in the memory and are executed by the processor.