Laser angle measurement device and method

Abstract

The invention relates to the technical field of angle measurement, and provides a laser angle measurement device and method. The device comprises an optical interference module, a detection module, aphase feedback control module and a signal extraction module, the optical interference module divides the incident laser into a transmission laser and a reflection laser, and the reflection laser andthe transmission laser after reflection are converged to obtain a third laser; the detection module measures the light spot intensity and the spatial position information of the third laser; the phasefeedback control module controls the optical interference module to change the phase difference between the transmitted laser and the reflected laser according to the light spot intensity; the signalextraction module calculates the deflection angle of the incident laser according to the spatial position information of the third laser spot based on the weak value amplification principle. According to the invention, the offset of the light spot at the detection end is amplified, so that the measurement sensitivity is improved, the requirement on the precision of the detector is lowered, and the high-precision detection performance can be obtained by using a low-precision detector.

Description

technical field [0001] The invention relates to the technical field of laser attitude measurement, in particular to a laser angle measurement device and method. Background technique [0002] The concept of weak measurement and weak value was proposed by Y.Aharonov, D.Z.Albert, and L.Vaidman in 1988. At first, it only aroused people's discussion in theory. In the past 10 years, due to the continuous emergence of various weak measurement verification experiments, weak measurement technology received wider attention. At present, the research on weak measurement technology is mainly divided into two aspects: one is in the field of quantum basic research, which is used for the direct measurement of quantum state wave functions and the characterization of non-classical properties of quantum mechanics; the other is for the field of precision measurement, that is, weak values Magnification measurement technique. Weak value amplification measurement technology can convert unknown p...

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Problems solved by technology

[0005] However, the previous relevant deflection angle measurement schemes only measured the deflection angle of the internal mirror of the interferometer. For applications such as laser attitude measurement, the previous measurement schemes not only could not enlarge the deflection angle, but would reduce the detection system’s ability to detect the deflection angle. Measurement sensitivity of a deflection angle

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