High-precision absolution relative gravity measurement instrument driven by optical force

Abstract

The invention discloses a high-precision absolution relative gravity measurement instrument driven by optical force. The measurement instrument comprises a first laser, a collimation beam extending system, a reflection mirror, a first beam divider, a second beam divider, a falling body prism, a reference prism, a photoelectric detector, a second laser, a steering lens, a focusing lens and a four-quadrant detector. A hollow photonic crystal fiber light trap system is arranged between the second laser and the steering lens. Micro particles are arranged in the light trap system. According to the invention, high-precision gravity accelerated speed is achieved by use of optical force effects; when the gravity accelerated speed is precisely measured, the measured dynamic range is quite wide; by use of different parts to work, high precision measurement of the absolute gravity accelerated speed can be achieved and real-time measurement of the relative gravity accelerated speed can be achieved; the measurement dynamic range is wide; and the measurement instrument is suitable for aerospace and sailing field.

Description

technical field [0001] The invention belongs to the technical field of high-precision gravity measurement, and relates to a high-precision gravity measurement instrument, in particular to a high-precision absolute relative gravity measurement instrument driven by optical force, which can simultaneously realize absolute gravity measurement and relative gravity measurement. Background technique [0002] The photodynamic effect refers to the interaction between light carrying energy and momentum and matter, resulting in the exchange of momentum, which is manifested as the effect of light exerting force on objects. The magnitude of the force is equal to the change of the momentum of the object per unit time caused by the light, and thus can cause the displacement and speed of the object to change. The force generated by light is directly proportional to the light intensity, the stronger the light intensity and the smaller the mass of the irradiated object, the more obvious this ...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the relative gravimeter is that it can only measure the relative change of gravity, and cannot give the absolute value of the acceleration of gravity, so the accuracy of the relative gravimeter depends on the calibration of the absolute gravimeter

[0005] At present, the absolute gravimeter has high measurement accuracy, but the absolute measurement period is long, the measurement dynamic range is small, and the application environment requirements are high. The relative gravimeter has a large measurement dynamic range, but the measurement accuracy is low, so the development can realize high-precision measurement of absolute gravity. Acceleration, and can measure the relative acceleration of gravity in real time, it is very important to measure the gravimeter with a large dynamic range

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