Optical path adjustment device, method and gravimeter
A technology of optical path adjustment and gravimeter, which is applied in the field of gravimeter, can solve the problems such as the decrease of measurement accuracy, and achieve the effect of improving sensitivity and accuracy
Active Publication Date: 2020-02-07
NAT INST OF METROLOGY CHINA
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[0004] When there is a certain angle between the laser and the gravitational acceleration, the actual measurement result is the component of the gravitational acceleration along the laser direction, that is, the measurement result of the atomic interference gravimeter is the component along the effective wave vector direction of Raman (Raman) light, resulting in a decrease in measurement accuracy
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[0049] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
[0050] At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.
[0051] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way intended as any limitation of the disclosure, its application or uses.
[0052] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of t...
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The invention provides an optical path adjusting device and method and a gravity meter and relates to the field of gravity meters. The device comprises an optical fiber device, a collimator, a gravitymeter optical component and a detector, wherein the optical fiber device transmits incident light to the collimator and extracts measuring light beams reflected by the gravity meter optical component; the collimator converts the incident light into collimated light; the gravity meter optical component uses the collimated light to form the measuring beams and reflects the measuring beams to the optical fiber device; the detector detects the reflected measuring beams extracted by the optical fiber device and outputs a detection signal so as to adjust the angle of the measuring beams according to the detection signal to allow the measuring light beams to be vertical to a horizontal datum plane. By the device, problems such as poor reproducibility caused by human factors can be avoided, and the sensitivity and accuracy of optical path perpendicularity adjusting are increased.
Description
technical field [0001] The present disclosure relates to the field of gravimeters, in particular to an optical path adjustment device and method, and a gravimeter. Background technique [0002] Gravitational acceleration is one of the important parameters of the geophysical field, which is caused by factors such as the earth's gravity and rotation, and changes with time and space, with temporal and regional characteristics. High-precision gravity measurement is of great significance in geophysics, geodesy, etc., and has an important impact on basic physics and other research fields. [0003] At present, absolute gravimeters are generally divided into two types: optical gravimeters and atomic gravimeters, which use free-falling corner cubes and cold atomic groups as the measured masses. Form optical interference fringes and atomic interference fringes to realize the measurement of gravitational acceleration. [0004] When there is a certain angle between the laser and the g...
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IPC IPC(8): G01V7/04
CPCG01V7/04
Inventor 赵阳王少凯庄伟李天初
Owner NAT INST OF METROLOGY CHINA