287results about "Turn-sensitive devices" patented technology

Microelectromechanical component (100) for motion measurement, comprising: a fortified section (118); a single, central anchor (106) coupled to the attached section (118) with four sides; a first non-straight suspension element (108) coupled to the anchor (106) on one side of the anchor (106); a second non-straight suspension member (120) coupled to the anchor (106) on the same side of the anchor (106), wherein the second non-straight suspension member (120) has a shape and position that mirrors the first non-straight suspension member (108) on a plane (122) bisecting the anchor; and a test mass (104) which is planar, wherein the test mass (104) is suspended at least partially on the first non-straight suspension member (108) and the second non-straight suspension member (120) such that the test mass (104) is rotatable about the anchor (106) and displaceable in a plane which is parallel to the attached section (118), where the first and second non-straight suspension members (108, 120) are bending bearings, wherein the first non-straight suspension member (108) has a C-shape, wherein the C-shape includes an inner section (110) which is coupled to the anchor (106) and extends towards the plane (122) bisecting the anchor, a central section (114) which includes a nearby section and has a distant section, whereby the near section is coupled to the inner section (110), and the far section extends away from the anchor (106) along the plane (122) bisecting the anchor and is coupled to an outer section (112) extending away from the plane (122) bisecting the anchor.

An optical frequency generation system (100), comprising: - reference atoms (7) in a gas phase, - an interrogation laser source (1) configured to emit an interrogation signal (101) comprising a first optical frequency suitable for exciting a two-photon transition in said reference atoms (7), said interrogation signal (101) being configured to interact with said reference atoms (7) in a Doppler-free scheme; - optical frequency modulation means (31, 31a, 31b) configured to adjust said first optical frequency and to modulate said first optical frequency at a first modulation frequency f1; - an optical sensor (9) configured to detect a fluorescence signal (110) from said reference atoms (7); - a first control loop (10) configured to lock said first optical frequency to a resonance frequency of said two-photon transition, said fluorescence signal (110) being input into the first control loop (10); - a mitigation laser source (2) configured to emit a mitigation signal (102) comprising a second optical frequency selected to produce a light-shift of said two-photon transition of opposite sign of the light-shift produced by the interrogation signal (101); characterized in that the optical frequency generation system (100) further comprises: - optical amplitude modulation means (5) configured to modulate the amplitude of the interrogation signal (101) and of the mitigation signal (102) at a second modulation frequency f2, and - a second control loop (20) configured to adjust the relative amplitude of the mitigation signal (102) with respect to the interrogation signal (101) such as to cancel the effective light-shift of the combined interrogation (101) and mitigation (102) signals.

The invention relates to a hemispherical resonator and hemispherical gyroscope parameter and defect identification system and method, and belongs to the technical field of hemispherical resonator gyroscopes. According to the invention, automatic identification of damping non-uniformity, rigidity non-uniformity and 1-3-order quality defect parameters is respectively carried out on the fused quartz hemispherical resonator before and after film coating and the gyroscope header after base assembly, so that the full-flow coverage test of the hemispherical resonator gyroscope is realized; various parameters are identified in the whole process from harmonic oscillator machining forming to the gauge outfit state, the testing precision, the system reusability, the operation convenience and consistency are greatly improved, and the production efficiency is improved.

The invention discloses an SERF atomic gyro signal detection device and method based on an optical heterodyne method, and belongs to the technical field of atomic polarization stability control, after magnetic fields with x-axis frequency and y-axis frequency are applied to atoms in a sensitive unit air chamber, x-axis electron polarizability information under respective modulation frequencies comprises longitudinal polarizability information and longitudinal magnetic field information, and x-axis electron polarizability information and y-axis electron polarizability information under respective modulation frequencies comprise longitudinal polarizability information and longitudinal magnetic field information; the value of the longitudinal polarizability is obtained by resolving information contained in the two, and effective longitudinal polarizability closed-loop control is achieved through a liquid crystal phase delayer power stabilizing rate system. Based on the biaxial magnetic field modulation technology, interference of longitudinal magnetic field fluctuation on polarizability closed-loop control is effectively avoided, and effective polarizability in-situ closed-loop control is achieved.

A compact grating-mirror magneto-optical trap (GMOT) cold atom inertial sensor head is disclosed. To make the sensor head compatible with the high vibration levels encountered in dynamic environments, the number of optical ports in the vacuum chamber is minimized and various components, including fixed optical components and a reflective grating chip, are hard mounted within the vacuum chamber. The use of the reflective grating chip reduces the number of optical ports required for cooling beams from six to one. The number of optical ports is further reduced by time multiplexing multiple beams passing through a given optical port.

The invention discloses a holosymmetric four-mass MEMS gyroscope which comprises four sensitive mass block coupling structures which are arranged in a central symmetry manner, and four first U-shaped beams, four n-shaped beams and a cross-shaped coupling structure which are arranged in a central symmetry manner and are connected with the four sensitive mass block coupling structures, compared with the prior art, the four sensitive mass block coupling structures are designed compactly and symmetrically, so that the sensitivity can be effectively improved, and thermally induced drift can be effectively reduced. The driving mode and the working mode are separated through the specific coupling mechanism, so that frequency coupling is avoided, and environmental vibration interference is reduced. And meanwhile, the symmetry of the structure is beneficial to uniform distribution of thermal stress or mechanical stress, so that zero drift caused by temperature change is inhibited.

The application belongs to the field of optical precision manufacturing, and relates to a bottom-up atomic gas chamber manufacturing device and manufacturing method. The device is composed of a vacuum cavity, a pumping pipeline, a gas inlet pipeline, a discharge electrode plate set, an insulating support, a gas chamber, a laser, an alkali metal source and a vacuum gauge. The device is used for manufacturing the atomic gas chamber from bottom to top, and can be used for preparing various gas chambers with different gas pressure ratio requirements, thereby helping to realize customized preparation. The device reduces the disadvantages of impurity adsorption on the inner wall of the gas chamber and reduces uncontrollable risks. The device has high integration, high preparation efficiency and large secondary development space, and is favorable for accelerating the technical iteration of the atomic gas chamber and the cross-generation development of key technologies such as nuclear magnetic resonance gyroscopes, atomic clocks and magnetometers.

The present disclosure is directed to a device configured to detect whether the device is in a bag or outside of the bag. The device determines whether the device is in or outside of the bag based on distance measurements generated by at least one proximity sensor and motion measurements generated by at least one motion sensor. By using both distance measurements and motion measurements, the device is able to detect whether the device is in the bag or outside of the bag with high accuracy and robustness.

A high-temperature tank (116) includes an optical window which transmits a laser (132) and is provided at one end, and a right-angle conical mirror (102) which is provided at the other end, has an opening (106) at the apex and which reflects laser light (132) incident from the optical window towards the one end in an area other than the opening (106). A magnetic field generator (112) generates a magnetic field in the region of intersection of the laser reflected by the right-angle conical mirror (102). A magnetic field gradient relaxation module (130) generates a relaxation magnetic field which relaxes the gradient of the magnetic field generated by the magnetic field generator (112).

A vibration-type angular velocity sensor (100) includes a primary side control circuit (2) and a secondary side control circuit (3) which are configured so that a function as the primary side control circuit (2) and a function as the secondary side control circuit (3) are interchangeable, in which an offset value after interchange and an offset value before interchange are symmetric values with respect to a predetermined reference value.

A kind of atomic gyroscope pumping rate stable composite control method based on phase reshaping extended state observer and power approaching sliding mode control.Aiming at the problems that standard linear extended state observer has steady-state estimation error under the action of ramp disturbance, disturbance estimation phase lag and it is difficult to balance between observation bandwidth improvement and noise sensitivity, a composite corrector composed of lead network and lag network is cascaded at the output end of disturbance estimation of extended state observer, the disturbance estimation channel is shaped in frequency domain, phase lead is provided in mid-frequency band to reduce compensation delay, amplitude lag characteristic is used to suppress high-frequency noise, and parameter constraint design is used to realize zero-error estimation of ramp disturbance;At the same time, a power approaching sliding mode controller is constructed to improve the adaptability to the nonlinear, internal and external coupling and parameter uncertainty of atomic gyroscope system, and the phase reshaping extended state observer is combined to effectively estimate and feed forward compensate the lumped disturbance, so as to improve the stability and accuracy of pumping rate control.The present application can balance dynamic anti-disturbance performance, steady-state control accuracy, convergence speed and noise robustness without significantly improving the observation bandwidth, and is suitable for atomic gyroscope precision control system affected by ultra-low frequency slowly varying disturbance.

The invention relates to the technical field of gyroscopes, and discloses a frequency hopping gyroscope, which comprises a first connecting switch, a second connecting switch, a first driving comb tooth electrode and a second driving comb tooth electrode, when the angular velocity in the first direction is detected, the two driving mass blocks are switched between two driving modes of same-direction driving motion and reverse-direction driving motion, and when the angular velocity in the third direction is detected, the two detection mass blocks are switched between two detection modes of same-direction detection motion and reverse-direction detection motion; and the second connection switch is configured to be capable of changing the polarities of the first detection comb tooth electrode and the second detection comb tooth electrode of the detection electrodes on the detection mass block with the detection direction changing. According to the frequency hopping gyroscope disclosed by the invention, the problem that the existing gyroscope generally adopts a fixed working frequency is solved, the working frequency of the gyroscope can be changed, and the frequency hopping gyroscope has relatively high safety performance.

The application relates to the technical field of lasers, in particular to a semiconductor laser for a quantum gyroscope and a preparation method thereof. The semiconductor laser for the quantum gyroscope comprises a stacking structure, the stacking structure comprises an N-type substrate, an N-type cladding layer, an N-type waveguide layer, an active region, a first P-type waveguide layer and a waveguide structure which are stacked in a first direction in sequence, and the waveguide structure comprises a low-duty-cycle V-shaped groove grating, a multimode interference coupling beam splitting waveguide, a gain waveguide array, a multimode interference coupling beam combining waveguide, a high-duty-cycle V-shaped groove grating and a micro-tapered waveguide which are arranged and connected in a second direction in sequence. The application is favorable for realizing the semiconductor laser for the quantum gyroscope with high power and narrow linewidth under the premise of reducing the complexity of the device structure.

The invention discloses a miniaturized pumping optical module based on a VCSEL (Vertical Cavity Surface Emitting Laser), which can realize miniaturization of the optical module through optical element layout and low-stress and less-stray-light installation, thereby being beneficial to meeting the requirements of performance test and pursuing of ultrahigh sensitivity by a large scientific device, and is characterized in that the miniaturized pumping optical module comprises a shell, the shell is formed by overlapping a photosensitive resin lower-layer structure shell, a photosensitive resin middle-layer structure shell and a photosensitive resin upper-layer structure shell layer by layer, a large gear and a small gear are arranged on the top face of the upper-layer structure shell, and a cylindrical groove where a quarter-wave plate is embedded is formed in the inner wall face of a center hole of the large gear. A VCSEL laser and a photoelectric detector which are parallel are arranged on the top face of the lower-layer structure shell, a polarization splitting prism is arranged in the upper-layer structure shell, a collimating lens set formed by overlapping a concave lens and a convex lens is arranged in a light source channel in the middle-layer structure shell, the transmission side of the polarization splitting prism is aligned with the quarter-wave plate, and the transmission side of the collimating lens set is aligned with the quarter-wave plate. The reflection side of the polarization splitting prism is connected with a photoelectric detector.

Method for the precise measurement operation of a micromechanical angular rate sensor, comprising at least one deflectably suspended seismic mass (1, 15, 20), at least one drive device for driving the seismic mass (1, 15, 20) and at least one first (2, 11, 18) and one second (3, 12, 19) trim electrode element, which are directly or indirectly jointly assigned to the seismic mass (1, 15, 20), wherein a first electrical trim voltage (U) is applied between the first trim electrode element (2, 11, 18) and the seismic mass (1, 15, 20). TO1 , U TLO1 , U TRO1 , U TU2 , U T1H , U T2V ) and a second electrical trim voltage (U) between the second trim electrode element (3, 12, 19) and the seismic mass (1, 15, 20) TO2 , U TLO2 , U TRO2 , U TU1 , U T2H , U T1V) are set, whereby the first and second electrical trim voltages depend at least on a quadrature parameter (U). T ) and a resonance parameter (U f ) are set, characterized by the fact that the first (U TO1 , U TLO1 , U TRO1 , U TU2 , U T1H , U T2V ) and the second (U TO2 , U TLO2 , U TRO2 , U TU1 , U T2H , U T1V ) electrical trim voltage is set so that the sum of the square of the first electrical trim voltage (U) TO1 , U TLO1 , U TRO1 , U TU2 , U T1H , U T2V ) multiplied by a first constant factor (α) and from the square of the second electrical trim voltage (U) TO2 , U TLO2 , U TRO2 , U TU1 , U T2H , U T1V) multiplied by a second constant factor (β), is kept constant and / or is based on a first reference value of the resonance parameter (U) f ) is set to the square.

The utility model provides a miniature shock-resistant gyroscope, which belongs to the technical field of angular rate, and comprises an assembly shell, a sealing cover, a detection component and a shock absorption piece, the assembly shell is provided with a containing cavity, and one side of the containing cavity is provided with an opening communicated with the outside; the sealing cover covers the opening of the accommodating cavity and is connected to the assembly shell; the detection assembly is arranged in the accommodating cavity, and the detection assembly comprises a packaging shell and a detection part arranged in the packaging shell; and the damping part sleeves or surrounds the periphery of the packaging shell and is used for relieving the vibration force borne by the detection assembly. The utility model provides a miniature shock-resistant gyroscope, and aims to solve the problems that a miniature gyroscope in the prior art has higher sensitivity to environmental interference and is easily influenced by an external vibration environment, so that the detection precision is reduced.

The application belongs to the technical field of precision measurement, and discloses a heating, excitation and frequency splitting measurement method of a quartz hemispherical resonator. The method uniformly heats the quartz hemispherical resonator by using an infrared light source, excites the quartz hemispherical resonator based on a "four-wave belly" vibration mode by a piezoelectric excitation sheet, reads vibration signals by a laser vibration tester, analyzes the frequency splitting and the direction of the stiffness uneven axis of the quartz hemispherical resonator, and adjusts the stiffness unevenness of the quartz hemispherical resonator by etching and removing weight by an ion beam. The method solves the problem of the circumferential stiffness unevenness of the quartz hemispherical resonator, and compared with the previous frequency splitting adjustment of the resonator, the application adjusts the frequency splitting of the resonator from the stiffness adjustment angle, and improves the frequency splitting temperature change interference characteristic of the quartz hemispherical resonator after adjustment.

Micromechanical structure (1), in particular a gyroscope, comprising a substrate (2) having a principal extension plane (100), a first detection mass element (11) and a second detection mass element (21), wherein the first detection mass element (11) is provided to be excitable by a first drive element (10) to a first vibration (101) parallel to the principal extension plane (100), wherein the second detection mass element (21) is provided to be excitable by a second drive element (20) to a second vibration (201) antiparallel to the first vibration (101), wherein a first Coriolis deflection of the first detection mass element (11) along a third direction (Z) perpendicular to the principal extension plane (100) is detectable by a first detection means,wherein a second Coriolis deflection of the second detection mass element (21) along the third direction (2) is detectable by a second detection means and wherein the first and the second detection mass elements (11, 21) are coupled to each other by means of a first coupling element (3), characterized in that the first detection mass element (11) is designed as a first rocker structure (11') and the second detection element (21) as a second rocker structure (21'), wherein the first and second rocker structures (11' and 21') are attached to the first and second drive elements (10 and 20) by means of a first and second torsion spring (13 and 23, respectively), respectively, wherein the first and second torsion axis (13' and 23') of the first and second torsion spring (13, 23) are parallel to the first and second directions (X, 2, 3, 4, 5, 6, 7, 8, 9, 10 ...Y) is provided and the first or second rocker structure (11' or 21') has an asymmetric mass distribution with respect to the first or second torsion axis (13' or 23'), wherein the first and / or the second torsion spring (13, 23) are designed as a conductor spring, wherein the first and / or the second torsion spring (13, 23) are designed as a double conductor spring.

A vapor cell includes a cell body and a cell window anodically bonded to the cell body. The cell window and the cell body define a vapor cavity configured to contain a vapor comprising a plurality of alkali atoms.

This disclosure relates to an inertial sensor for measuring an inertial quantity along a sensing axis. The sensor comprises an atom interferometer comprising a pulse generator to generate one or more pulsed light beams, defined by a respective pulse duration to place atoms into a superposition, and re-combine the atoms to measure an interference of the atoms and calculate the inertial quantity based on the measured interference. The sensor further comprises an auxiliary acceleration sensor configured to measure acceleration transverse to one or more of the pulsed light beams; and a control system configured to calculate a transversal offset of the atoms relative to the pulsed light beams caused by the measured acceleration transverse to the one or more of the light beams, increase the pulse durations, and adjust the pulse timings to compensate for a reduced beam intensity applied to the atoms as a result of the transversal offset.

The invention relates to an anti-relaxation coating alkali metal gas chamber configuration integrating a gas chamber lock and a function partition and a method, which are beneficial to solving the problems of poor gas chamber roundness control, high gas chamber coating damage risk, low coating gas chamber density detection precision and the like through the combination of the multifunctional partition and the gas chamber lock, thereby remarkably improving the overall performance and reliability of the gas chamber. The lower port of the channel locking port extends downwards to form a main gas chamber, the upper port of the channel locking port extends upwards to form a sub gas chamber, the inner surface of the main gas chamber is provided with an anti-relaxation coating, the channel locking port between the double gas chambers is provided with a gas chamber lock, the sub gas chamber extends upwards to form a tail pipe, and the inner surface of the sub gas chamber is an alkali metal deposition position.

A pump-probe non-orthogonal angle calibration method for atomic spin inertial measurement is used to accurately evaluate the pump-probe laser non-orthogonal angle, characterized in that it comprises the following steps: step 1, place the atomic spin inertial measurement device in the working state, adjust the z-axis magnetic field bias to the compensation point, and record the initial value of the longitudinal electron spin polarization at this time step 2, apply a magnetic field B of 0.075 nT in the y-axis direction y ; step 3, change the pump laser power, record the pump laser power value I in , the corresponding inertial output signal steady-state value S x and the longitudinal electron spin polarization value; step 4, use the particle swarm algorithm to fit the parameters in step 3 to obtain the value of the pump-probe laser non-orthogonal angle α.

The present application relates to a kind of range extension system and method of cold atom interference gyro, utilize the output information of cold atom interference gyro and optical gyro, the maximum likelihood method is used to estimate the extension period number of cold atom interference gyro phase, the extension period number is fused with the output of cold atom interference gyro, obtain two cold atom interference gyro extension output value, the obtained two cold atom interference gyro extension output value is compared with optical gyro output value, with the absolute value minimum of difference value as judging basis, only uniqueness is judged, obtain final angular velocity.The present application fuses the advantages of cold atom interference gyro and optical gyro, solves the contradiction of large range and high resolution of angular velocity measurement, can realize angular velocity large range and high resolution measurement.Simultaneously, since the dynamic measurement range is small, the problem that cold atom interference gyro cannot be used for inertial navigation is solved, and a technical foundation for cold atom interference gyro used for inertial navigation is laid.

The application relates to a light polarization effect detection method of a SERF atomic spin gyroscope. 3 The atomic spin system of He, 2, the pumping light path is turned on, polarization operation is carried out on the two kinds of gases in the atomic gas chamber, the transmission of the electron angular momentum to the nuclear spin angular momentum is realized; 3, the detection light path is turned on, and the light signal is detected; 4, a single pulse disturbance of an alternating magnetic field is applied in the y direction, the K atom is deflected at a small angle, the Larmor precession is generated, the K and 3 The strong coupling effect of He atoms, the precession frequency of the K atoms under different main magnetic fields is linearly fitted, the slope value of the linear fitting is used to calculate the electron spin polarization rate, the intercept value when the applied main magnetic field value is 0 is used to calculate the equivalent magnetic field generated by the nuclear spin, and the direct and indirect polarization effects of the pumping light on the two kinds of atoms are detected by the slope and the intercept value. The effects of the two kinds of atoms polarized directly and indirectly by light are presented in the form of linear numerical fitting.

This invention belongs to the technical field of micro inertial measurement unit (MMU) structure design, and discloses a miniaturized MMU structure resistant to high overload. It includes: an upper buffer energy-absorbing material, a lower buffer energy-absorbing material, an upper shell, a lower shell, and a core adhesive block; both the upper and lower shells are disc-shaped structures with a through hole in the center to accommodate the core adhesive block; four threaded holes are provided around the perimeter for fixing the upper and lower shells; the upper buffer energy-absorbing material is disposed on the upper surface of the upper shell, and the lower buffer energy-absorbing material is disposed on the lower surface of the lower shell; the upper and lower buffer energy-absorbing materials are used to seal the core adhesive block within the upper and lower shells and for buffering and shock absorption; the core adhesive block includes an adhesive material and a micro inertial measurement unit circuit unit sealed within the adhesive material.

This invention relates to a high-precision data acquisition, processing, and magnetic field drive system, mainly comprising a data acquisition module, a processing module, a magnetic field drive module, a power supply module, and a host computer. The data acquisition module converts external analog signals into digital signals and transmits them to the processing module. The processing module includes a processing unit, a high-stability temperature-controlled crystal oscillator, an external clock signal interface, a DDR chip, Flash memory, a high-speed connector, and a digital power supply module. This module performs digital processing such as filtering and phase-locked loop (PLL) on the signals. The host computer can communicate with the FPGA core processing module via both Ethernet and serial ports to control the bias, amplitude, and frequency of the signals generated by the magnetic field drive module, display the read-back online data, and generate real-time curves. This invention realizes a low-cost, high-precision NMR gyroscope magnetic field control system, achieving high-precision closed-loop control of the NMR gyroscope's magnetic field.

A System for Measuring Body Kinetics includes a wearable device configured to be wrapped around a joint. A microprocessor is attached to the wearable device. One or more Inertial Measurement. Units (IMUs) are connected to the microprocessor and arranged on the wearable device. The IMUs are arranged and configured to provide kinetic data concerning the joint to the microprocessor. A wireless transmission component is connected to the microprocessor. The microprocessor is configured to receive kinetic data from the IMUs, and to transmit the kinetic data by way of the wireless transmission component to a central processor or other device. An algorithm resides within the microprocessor or the central processor or other device, and is configured to determine the position of each IMU from the kinetic data. The wearable device may be constructed of fabric, strap, adhesive tape, or a combination thereof.

The SERF gyroscope multi-parameter in-situ measurement method based on transverse magnetic field resonance first measures the amplitude-frequency characteristic curve of SERF atomic spin gyroscope Bx, By alternating current magnetic field response, then finds the resonance frequency and resonance amplitude value corresponding to the alkali metal electron resonance peak in x and y directions respectively, and finally constructs an equation through the ratio of the resonance frequency and resonance amplitude value corresponding to the alkali metal electron resonance peak in x and y directions, and obtains the accurate values of the electron magnetic field, the slowing factor and the electron transverse relaxation rate through the global optimization function algorithm. The present application can realize the in-situ accurate measurement of the electron magnetic field, the nuclear magnetic field, the electron polarizability, the nuclear polarizability, the slowing factor and the electron transverse relaxation rate of the SERF atomic spin gyroscope without changing the system state.

The application discloses a method for real-time suppression of zero bias drift and improvement of zero bias stability of a symmetrical gyroscope, which comprises the following steps: after a micro-electro-mechanical gyroscope is powered on, the working mode of the micro-electro-mechanical gyroscope is periodically exchanged, a damping angle is obtained by real-time identification during the mode exchange, and the damping angle is added to the mode angle of the corresponding working mode after the mode exchange. The application is applied to the field of micro-electro-mechanical gyroscopes, and the damping axis deflection angle error of the mode deflection micro-electro-mechanical gyroscope is identified and corrected on-line, and the traditional mode exchange technology of the gyroscope is combined skillfully, so that the application does not need to introduce any physical mechanism, has no special requirement on the processing technology of the gyroscope, is easy to operate, is stable and reliable, does not introduce additional test and calibration steps, can realize real-time self-calibration and self-compensation of the zero bias output of the gyroscope, improves the zero bias stability of the gyroscope and the repeatability of the gyroscope, and can effectively meet the demand of the military and civilian markets on high-precision micro-electro-mechanical gyroscopes.

The present application relates to the technical field of quantum sensing based on atomic cell, in particular to a light glue inner mirror surface reflection multi-optical path atomic cell and application thereof. The light glue inner mirror surface reflection multi-optical path atomic cell of the present application increases the optical path of the probe laser in the atomic cell cavity and amplifies the signal without changing the size of the spectral analysis cell chamber; ultimately, the fundamental sensitivity of the measurement is limited by the quantum shot noise of the atoms, and the limit of such sensitivity is called the standard quantum limit, which is inversely proportional to the square root of the number of atoms simultaneously detected in the chamber. The multi-optical path design of the light glue inner mirror surface reflection multi-optical path atomic cell of the present application can make the probe laser cover the entire cross section of the atomic cell cavity and simultaneously detect almost all the atoms in the atomic cell cavity, thereby greatly improving the signal-to-noise ratio of the measurement and the sensitivity under the standard quantum limit caused by the shot noise.