Device and method for detecting acceleration on basis of back scattered light of nano particle detection

Abstract

The invention discloses a device and method for detecting acceleration on the basis of back scattered light of nano particle detection. The device comprises a reflective mirror, a light reducing plate, a beam splitter, a light filer, a first focusing lens, first nano particles, second nano particles, grinding taper optical fibers, a rigid connecting rod, a second focusing lens, pinholes, a separating light detector, a laser, a collimating lens, a light intensity modulator, a DSP processor and a micro circulation channel. The device and method for detecting the acceleration on the basis of the back scattered light of the nano particle detection are based on highly sensitive nanoscale displacement measurement, the structure can obtain extremely high measurement resolution of the acceleration and is only restricted by the absolute value of restoring force of light pressure, and meanwhile, a loop-locked control circuit can extend a dynamic measurement range greatly. According to the device and method for detecting the acceleration on the basis of the back scattered light of the nano particle detection, the acceleration of nanoscale displacement is measured without physical contact, the device is not sensitive to other kinds of acting force not in the acceleration direction, and the device and method for detecting the acceleration on the basis of the back scattered light of the nano particle detection have the advantages of being low in noise, high in sensitivity and capable of carrying out high precision identification and analysis, and having feedback functions.

Description

technical field [0001] The invention relates to a detection method for nanometer displacement acceleration, in particular to a device and method for detecting nanometer displacement acceleration based on nanoparticle backscattered light detection and light pressure adjustment feedback system. Background technique [0002] Newton's second law of motion states that the acceleration of an object is proportional to the force on the object and inversely proportional to the mass of the object. The direction of acceleration is the same as the direction of the resultant external force. Acceleration can be measured by force. Most of the current high-precision acceleration sensors use electrostatic levitation technology or magnetic levitation technology to realize non-contact support for the sensing mass. [0003] According to quantum theory, a light beam is a group of photon streams moving at the speed of light and having both mass and momentum. When the light beam is refracted and ...

AI Technical Summary

Problems solved by technology

The disadvantage of this measurement device is that the Gaussian beam directly emitted from the optical fiber is used as an optical tweezer to capture the particles. The beam waist diameter of the Gaussian beam is similar to the mode field diameter of the optical fiber, so the particle size it can capture is limited and cannot be too small. And the capture power is not strong

However, the use of photoelectric image detectors to measure the deviation of particles can only detect the movement of particles on the order of microns, which is the main factor that limits the accuracy of this acceleration detection method.

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