A prism device, optical path offset compensation method and optical module

Abstract

The present invention discloses a prism device, an optical path offset compensation method and an optical module, wherein a printed circuit board is provided on the printed circuit board, wherein a first board, a second board, a thermistor feedback circuit unit, a central processing unit, a power supply, a beam splitter prism optical signal feedback unit and a PD photodetector are provided, wherein the second board is connected to the printed circuit board via a micro-motor system, wherein a prism is provided on the second board, and a beam splitter prism is provided at the output end of the prism, wherein the light wave is divided into two by the beam splitter prism, wherein one part of the light wave is transmitted to a collimator, and the other part is transmitted to the PD photodetector. The present invention can monitor temperature changes in real time and automatically adjust the prism angle, improve slight displacement, so as to compensate for optical path offset and ensure stable signal transmission.

Description

Technical Field

[0001] The present invention relates to a prism device, an optical path offset compensation method and an optical module, belonging to the technical field of optical modules, and in particular to a prism device with an optical path offset compensation function, an optical path offset compensation method and an optical module. Background Art

[0002] With the rapid development of optical communication technology, the demand for data transmission rate and capacity continues to rise. Optical modules have been widely used in the field of optical communications. When the optical module in the prior art is working, heat will be generated when the transmitting end laser is working. The light beam is conducted in the filter and prism. The heat accumulation causes the prism to slightly shift and the angle deviation to slightly change, thereby offsetting the optical path. This offset will greatly affect parameters such as loss and isolation, seriously interfering with signal transmission. Therefore, it is urgent to develop a prism device with optical path offset compensation function to solve the above technical problems. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a prism device, an optical path offset compensation method and an optical module with an optical path offset compensation function in response to the technical defects existing in the prior art, which can monitor temperature changes in real time and automatically adjust the prism angle, improve slight displacement, compensate for optical path offset, and ensure stable signal transmission.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: the present invention discloses a prism device with an optical path offset compensation function, comprising a printed circuit board, on which a first board, a second board, a thermistor feedback circuit unit, a central processing unit, a power supply, a spectroscopic prism optical signal feedback unit and a PD photodetector are arranged, the first board is fixedly connected to the printed circuit board, a light source and a lens arranged one-to-one on the first board are arranged, the second board is connected to the printed circuit board through a micro-motor system, a prism is arranged on the second board, a filter arranged one-to-one with the lens is arranged at the incident end of the prism, a spectroscopic prism is arranged at the output end of the prism, a light wave is split into two by the spectroscopic prism, one part of the light wave is transmitted to a collimator, and the other part is transmitted to the PD photodetector, and the micro-motor system, the thermistor feedback circuit unit, the central processing unit, the power supply, the spectroscopic prism optical signal feedback unit and the PD photodetector are electrically connected.

[0005] In a preferred embodiment of the present invention, the micro-motor system includes a PCBA, on which a control component and a micro-mechanical resonant shaft device are arranged, the control component includes a sensor module, a voltage control module, a storage module and a transmission control module, the micro-mechanical resonant shaft device includes a mechanical rotating central axis, the mechanical rotating central axis realizes rotation adjustment through a voltage control module, two mirror-symmetrically arranged X-axis micro-resonant shafts and two mirror-symmetrically arranged Y-axis micro-resonant shafts are arranged on the mechanical rotating central axis, the central axis of the X-axis micro-resonant shaft and the central axis of the Y-axis micro-resonant shaft are perpendicular to each other, and the PCBA is also provided with arc-shaped limit plates for the axial rotation of the X-axis micro-resonant shaft and the Y-axis micro-resonant shaft.

[0006] In a preferred embodiment of the present invention, the micro-motor system drives the prism connected above the mechanical axis to change slightly in the three directions of X / Y / Z by controlling the rotation and resonant vibration of the shaft, and finally adjusts the incident angle of the prism receiving the output light signal from the optical transmission waveguide structure, so that the received incident light beam signal is different from the angle of the prism, thereby changing the wavelength of the reflected light signal.

[0007] In a preferred embodiment of the present invention, the micro-motor system adjusts the voltage through a voltage module circuit, and different voltages form different shaft displacement positions and different amplitudes of resonance axis change amplitudes, thereby controlling the displacement of the prism in the X, Y, and Z directions in a linked manner.

[0008] The present invention also discloses a method for realizing optical path offset compensation using a prism device, which is characterized in that the temperature change caused by the heating of the electronic component is detected; the optical path change caused by the temperature change is detected by a photoelectric detector; the detection result of the photoelectric detector is fed back to a central processing unit; the central processing unit drives a thermistor feedback circuit to analyze the temperature change; according to the analysis result, a micro-motor control unit is driven by a feedback signal to control the displacement of the prism; and after the prism is moved, the optical path analysis is confirmed.

[0009] In a preferred embodiment of the present invention, a relationship model between temperature and optical path deviation angle is established; a relationship model between temperature and lens deformation is established; a temperature compensation function is calculated based on the above model; and the displacement and angle adjustment of the prism are determined using the temperature compensation function.

[0010] In a preferred embodiment of the present invention, the temperature change of the prism is sensed in real time by a thermistor; the change of thermistor value is calculated by a comparison circuit of a thermistor feedback unit; the temperature change is calculated based on the change of thermistor value; and the calculated temperature change data is transmitted to a central processing unit.

[0011] In a preferred embodiment of the present invention, the central processing unit compares the original wavelength and the shifted wavelength data of the light wave; when the wavelength shift exceeds a preset limit, the thermistor feedback circuit unit is triggered to operate; and the control parameters of the micromotor control unit are calculated based on the output of the thermistor feedback circuit unit.

[0012] In a preferred embodiment of the present invention, the central processing unit automatically calculates the displacement of the prism based on the calculated parameters; drives the micro-motor control unit to control the movement of the prism; after the prism is moved, the photoelectric detector is driven again to detect the light wave signal in real time; the detected signal is analyzed and the wavelength of the light wave is calculated; and the calculated wavelength is compared to see if it is within a preset range. If not, the above steps are repeated until the wavelength meets the requirements.

[0013] The invention also discloses an optical module, comprising a prism device with an optical path deviation compensation function.

[0014] The beneficial effects of the present invention are as follows: the present invention provides a prism device with an optical path offset compensation function and a method for using the same, which has the following significant technical effects:

[0015] First, the present invention effectively solves the problem of optical path angle deviation caused by laser heating, and significantly improves the stability and reliability of the optical path. By integrating key components such as thermistor feedback circuit unit, central processing unit, beam splitter prism optical signal feedback unit and PD photodetector, a complete optical path deviation detection and compensation system is constructed. This system design can monitor the temperature changes caused by the heating of electronic components in real time, and timely detect the resulting optical path changes, thereby providing accurate data support for subsequent compensation operations.

[0016] Secondly, the automatic compensation mechanism of the present invention can respond to temperature changes in real time without manual intervention, greatly improving the working efficiency of the system. A precise micro-motor system is used, including a control component and a micro-mechanical resonant shaft device set on the PCBA. This design allows the rotation adjustment of the mechanical rotating center axis to be achieved through a voltage control mode, and fine adjustments are made using the micro-resonant shafts of the X-axis and Y-axis. This multi-dimensional adjustment mechanism greatly improves the accuracy and flexibility of optical path compensation, can effectively deal with complex optical path offset situations, and achieve fully automated operation.

[0017] Furthermore, the present invention significantly reduces the impact of optical path deviation on parameters such as loss and isolation, ensuring the quality of signal transmission. The micro-motor system can achieve fine adjustment of the prism in the three directions of X / Y / Z by controlling the rotation of the shaft and the resonant vibration of the shaft. This design cleverly utilizes the characteristics of the prism and achieves precise control of the wavelength of the reflected light signal by changing the angle between the incident light beam and the prism. This feature gives the present invention significant advantages in optical signal processing and wavelength adjustment, and effectively reduces the negative impact of optical path deviation on system performance.

[0018] In addition, the present invention also establishes a relationship model between temperature and optical path deviation angle, temperature and lens deformation, and calculates the temperature compensation function accordingly. This model-based compensation method greatly improves the accuracy and reliability of optical path compensation, can better cope with the complex effects brought about by temperature changes, and further ensures the stability of the optical signal.

[0019] Finally, the present invention adopts a closed-loop control strategy. After completing the prism displacement adjustment, the system will drive the photodetector again to detect the light wave signal in real time, and perform wavelength calculation and comparison. If the calculated wavelength is not within the preset range, the system will repeat the compensation steps until the requirements are met. This iterative method ensures the high accuracy and stability of the optical path compensation, further improving the reliability of the system.

[0020] In summary, the present invention realizes high-precision, real-time, and automated compensation for optical path deviation by comprehensively using advanced hardware design and intelligent algorithms. This not only significantly improves the stability and reliability of the optical system, but also provides strong technical support for high-precision optical applications. By effectively solving the problem of optical path angle deviation caused by laser heating, realizing automatic real-time compensation, and reducing the impact of optical path deviation on key parameters, the present invention has broad application prospects in the fields of optical communication, optical measurement, etc., and can greatly improve the performance and efficiency of related systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0022] Figure 1 A schematic diagram of the present invention;

[0023] Figure 2 A front view of the present invention;

[0024] Figure 3 A top view of the present invention;

[0025] Figure 4 The working principle diagram of the present invention;

[0026] Figure 5 The working principle diagram of the beam splitter prism feedback unit of the present invention;

[0027] Figure 6 The working principle diagram of the thermistor feedback unit of the present invention;

[0028] Figure 7 is a schematic diagram of the invented micro-motor system;

[0029] In the figure, 1-printed circuit board (PCBA), 2-collimator, 3-PD photodetector, 4-beam splitter prism, 5-second board, 6-prism, 7-micro-motor system, 8-first filter, 9-second filter, 10-third filter, 11-fourth filter, 12-first lens, 13-second lens, 14-third lens, 15-fourth lens, 16-thermistor feedback circuit unit, 17-central processing unit, 18-power supply, 19-beam splitter prism optical signal feedback unit, 20-light source, 21-first board. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] Example 1

[0032] like Figure 1-4 As shown, the present invention provides a prism device with an optical path offset compensation function, and its structure and working principle are as follows: The core component of the device is a printed circuit board 1, which serves as the basic platform of the entire system and carries and connects various functional modules. On the printed circuit board 1, multiple key components are set, including a first board 21, a second board 5, a thermistor feedback circuit unit 16, a central processor 17, a power supply 18, a spectroscopic prism optical signal feedback unit 19 and a PD photodetector 3. These components, through a carefully designed layout and connection, together constitute a complete optical path offset detection and compensation system.

[0033] The first board 21 of the present invention is firmly fixed on the printed circuit board 1, on which the light source 20 and the lens array are arranged. The light source 20 is composed of 4 LD semiconductor lasers arranged in a linear array, and this arrangement is conducive to improving the output efficiency and stability of the light source. Corresponding to the light source 20 one by one, the lens array includes 4 first lenses 12, second lenses 13, third lenses 14 and fourth lenses 15 arranged in a linear manner. This configuration ensures that the light beam emitted by each laser can be properly focused and collimated.

[0034] The second board 5 of the present invention is connected to the printed circuit board 1 through the micro-electromechanical system 7. This connection mode allows the second board 5 to be precisely displaced under the control of the micro-electromechanical system 7. A prism 6 is mounted on the second board 5, and a filter array is provided at the incident end of the prism 6. The filter array is composed of a first filter 8, a second filter 9, a third filter 10 and a fourth filter 11, which correspond to the first lens 12, the second lens 13, the third lens 14 and the fourth lens 15, respectively. This filter configuration can achieve selective transmission of light waves of a specific wavelength, thereby obtaining the desired spectral characteristics.

[0035] The present invention provides a beam splitter prism 4 at the output end of the prism 6. After passing through the beam splitter prism 4, the light wave is split into two beams: one beam is transmitted to the collimator 2, and the other beam is transmitted to the PD photodetector 3. This optical path design enables the system to simultaneously realize the output and monitoring of optical signals.

[0036] The electronic assembly of the present invention includes a micro-electromechanical system 7, a thermistor feedback circuit unit 16, a central processing unit 17, a power supply 18, a beam splitter optical signal feedback unit 19 and a PD photodetector 3, all of which are connected through circuits to form a complete control and feedback system. It is worth noting that all optical components are bonded to the base board and then bonded to the printed circuit board 1. This installation method ensures the stability and accuracy of the optical system.

[0037] The pins of the PD detector 3 of the present invention are fixed to the circuit of the printed circuit board 1 by welding, and its output signal is connected to the circuit input end of the optical signal feedback unit of the beam splitter prism 19. The signal processor in the optical signal feedback unit of the beam splitter prism 19 analyzes the received spectral signal and then transmits the processed data to the central processor 17 for further analysis.

[0038] The main task of the central processor 17 of the present invention is to compare the original wavelength and the wavelength data of the light wave after the shift. When the wavelength shift exceeds the preset limit range (-0.08nm~+0.08nm), the central processor 17 will trigger the thermistor feedback circuit unit 16 to start working. The thermistor feedback circuit unit 16 includes a special circuit structure that can calculate the temperature change by measuring the change of resistance, current and voltage. Based on the obtained temperature change data, the system can calculate the angle change and position deviation, and transmit this information to the micro-motor system 7.

[0039] After receiving the control signal, the micro-electromechanical system 7 of the present invention drives the second plate 5 to perform precise displacement movement, thereby achieving compensation adjustment of the optical path. After the adjustment is completed, the central processor 17 activates the PD photodetector 3 again to detect the light wave signal in real time. The system then analyzes the new signal data, calculates the current light wave wavelength, and checks whether it falls within the predetermined required range.

[0040] The closed-loop control strategy of the present invention ensures that the system can continuously monitor and adjust the optical path to maintain the best working state. In this way, the present invention can effectively deal with the problem of optical path deviation caused by temperature changes or other factors, and ensure the stability and reliability of the optical system.

[0041] This embodiment demonstrates a compact and fully functional optical path offset compensation device, which integrates a variety of advanced optoelectronic components and control systems to achieve real-time detection and automatic compensation of optical path offset, providing reliable technical support for high-precision optical applications.

[0042] Example 2

[0043] This embodiment describes in detail the structure and working principle of the micro-electromechanical system 7. Figure 7 As shown in Figure 1, this system is the core component for achieving precise optical path offset compensation.

[0044] The main body of the micro-electromechanical system 7 is a PCBA (printed circuit board assembly), which integrates the control components and the micro-mechanical resonant shaft device. This integrated design not only reduces the size of the system, but also improves the control accuracy and response speed.

[0045] The control component is a micro-electromechanical system 7 which includes four key modules: sensor module 7.2, voltage control module 7.3, storage module 7.4 and transmission control module 7.5. These modules work together to ensure the efficient operation of the system.

[0046] The sensor module 7.2 is responsible for collecting real-time data of the system operation status, including but not limited to information such as position, angle, temperature, etc. These data provide the necessary basis for the precise control of the system.

[0047] The voltage control module 7.3 is the "power source" of the system, which controls the rotation of the mechanical rotating shaft 7.1 by adjusting the voltage. Different voltages can produce different shaft displacement positions, thereby achieving fine adjustment of the optical path.

[0048] The storage module 7.4 is used to store system configuration parameters, calibration data, operation logs, etc. These data are very important for the long-term stable operation and fault diagnosis of the system.

[0049] The transmission control module 7.5 is responsible for converting the control signal into specific mechanical movement to ensure that the system can move accurately in a predetermined manner.

[0050] The micro-mechanical resonant shaft device is the core component for achieving precise displacement. Its main body is the mechanical rotating center shaft 7.1, and the rotation adjustment is achieved through the voltage control module 7.3. On the mechanical rotating center shaft 7.1, two pairs of resonant axes are set: two mirror-symmetrically arranged X-axis micro-resonant axes 7.6 and two mirror-symmetrically arranged Y-axis micro-resonant axes 7.7. This design allows the system to be independently and precisely adjusted in both the X and Y directions.

[0051] The central axes of the X-axis micro-resonance axis 7.6 and the Y-axis micro-resonance axis 7.7 are perpendicular to each other. This arrangement ensures the orthogonality of the adjustment and avoids interference between adjustments in different directions. In order to limit the range of motion of the resonant axis and prevent damage that may be caused by excessive displacement, arc-shaped limit plates 7.8 are also provided on the PCBA. These limit plates not only play a protective role, but also ensure that the movement of the resonant axis is always within the effective range.

[0052] The working principle of the micro-electromechanical system 7 is to drive the prism 6 connected above the mechanical axis to make slight changes in the three directions of X, Y, and Z by controlling the rotation and resonance of the shaft. This three-dimensional adjustment capability enables the system to accurately adjust the incident angle of the prism 6 receiving the output light signal from the optical transmission waveguide structure.

[0053] By changing the angle between the incident light beam and the prism, the system can adjust the wavelength of the reflected light signal. The advantage of this method is that it can achieve precise control of the wavelength in a purely mechanical way without changing the light source.

[0054] Another key feature of the micro-electromechanical system 7 is that it can achieve precise control by adjusting the voltage through the voltage module circuit. Different voltages can not only form different rotation axis displacement positions, but also produce different amplitudes of resonant axis changes. This voltage regulation mechanism enables the system to control the prism 6 in linkage in the X, Y, and Z directions to achieve complex three-dimensional displacement.

[0055] This precise control mechanism enables the system to cope with various complex optical path deviation situations. For example, when the temperature changes and causes the optical path to deviate, the system can compensate for this deviation by adjusting the position and angle of the prism 6 to ensure the stability of the output optical signal.

[0056] It is worth noting that this mechanism can not only compensate for static optical path deviations, but also respond to dynamic changes in real time. By continuously monitoring the optical path status and making real-time adjustments, the system can maintain optimal performance under various working conditions.

[0057] The micro-electromechanical system 7 described in this embodiment demonstrates a highly integrated, precisely controlled optical path offset compensation mechanism. It achieves high-precision, multi-dimensional adjustment of the optical path by combining advanced electronic control technology and precision mechanical design. This design not only improves the performance and reliability of the system, but also provides the possibility for miniaturization and high integration of optical systems. In practical applications, this system can be widely used in scenarios that require high-precision optical path control, such as optical communications, optical measurement, laser processing and other fields, providing important support for technological progress in these fields.

[0058] Example 3

[0059] This embodiment discloses the specific implementation steps of the present invention, such as Figure 4-6 As shown, the specific implementation steps can be summarized as follows: detect the temperature change caused by the heating of electronic components; detect the light path change caused by the temperature change through the photoelectric detector; feed back the detection result of the photoelectric detector to the central processing unit; the central processing unit drives the thermistor feedback circuit to analyze the temperature change; according to the analysis result, drive the micro-motor control unit through the feedback signal to control the prism displacement; after moving the prism, perform light path analysis and confirmation.

[0060] The specific steps and working principle of the present invention are as follows:

[0061] Step 1. Heat generated by electronic components causes temperature changes: The laser at the transmitting end generates heat, and the light beam is conducted in the filter and prism. The overall heat accumulation will cause a slight change in the horizontal angle and position, which will cause a shift in the optical path angle, resulting in a significant impact on the loss and isolation parameters, and a greater impact on signal transmission. When the laser generates heat, due to physical effects such as thermal expansion, the refractive index and geometric shape of the prism will change slightly, causing the light beam to shift its exit angle after passing through the prism.

[0062] Step 2: Temperature changes lead to changes in the optical path (wavelength changes): The deviation of the light's output angle will affect the light's wavelength output. The wavelength of the light changes: At the same time, the change in temperature causes the wavelength deviation of the optical filter. The temperature drift coefficient of the common filter is 0.001nm / ℃. The changes in these two factors lead to a large deviation in the output wavelength, causing signal distortion. When the angle is offset, the beam splitter of the beam splitter feedback unit will also receive the offset wavelength, and then the photodetector of the beam splitter feedback unit will convert the optical signal into an electrical signal.

[0063] Step 3, the photodetector feeds back to the central processor: The photodetector 3 then transmits the feedback signal to the central processor 17 to compare the original wavelength and the shifted light wavelength data. If it exceeds a certain limit (-0.08nm~+0.08nm), the thermistor feedback circuit unit is driven to work in time.

[0064] Step 4: Thermistor feedback unit feedbacks the temperature change: Thermistor feedback circuit unit 16 can sense the temperature change △T of the prism in real time. The relationship between thermistor value and temperature is: Rt= RN*exp(1 / T-1 / TN), and thermistor Rt is calculated by the comparison circuit of thermistor feedback unit:

[0065] Rt=

[0066] The temperature change T can be calculated based on the change in thermistor resistance. Through preliminary experiments and calculations, the relationship model between temperature and optical path offset angle △θ, as well as temperature and lens deformation can be established. Assume that the temperature compensation formula is: △θ=f(T), △D=f(T), where f(T) is a specific temperature compensation function. In practical applications, it is necessary to fit and determine the temperature compensation function through a large amount of experimental data based on factors such as specific prism materials, structures, and optical path characteristics. Common fitting methods include polynomial fitting, linear fitting, etc.

[0067] Step 5: The CPU drives the thermistor feedback circuit to analyze the changes: The temperature T and the pre-trained data function relationship can be calculated. According to the circuit principle, the change in the resistance of the thermistor will cause the change in the circuit current. Assume that this change is a and is proportional to the change in the resistance of the thermistor, that is, =k( ), where k is the proportional constant calculated based on the input voltage Vcc, the output voltage Vout, the comparison resistor R1 and the feedback resistor Rf, It is the resistance of the thermistor at a reference temperature (such as room temperature). Assuming that there is no temperature influence, the relationship between the control electrical signal S and the displacement D is D=cS+d, where c and d are constants. Due to the existence of the temperature drift coefficient, temperature changes will cause additional changes in displacement. When the temperature changes △T, the change in displacement is: △D=0.001nm / ℃ △T. And because △T can be measured by thermistor, that is, , taking into account the actual displacement It can be expressed as:

[0068]

[0069] At the same time, the lens displacement may also cause a deflection angle change θ, and the incident angle change △θ will cause the wavelength changes,

[0070]

[0071] ,thereby The angle can be found from the actual change in wavelength:

[0072]

[0073] Finally, the relationship between temperature and micromotor control electrical signal can be obtained as follows:

[0074] Displacement control amount:

[0075] Angle control amount:

[0076] In practical applications, by measuring the resistance value of the thermistor, the angle change and the input control electrical signal, the actual displacement of the micromotor can be calculated based on this relationship.

[0077] Step 6, output feedback signal to drive the micro-motor control unit to control the displacement of the prism: the central processor 17 automatically calculates the displacement according to the obtained parameters, and then drives the micro-motor unit 7 to control the movement of the second plate 5, thereby driving the prism 6 to move.

[0078] Step 7, prism movement, and confirmation of optical path analysis after movement: When the movement is completed, the central processor 17 will continue to drive the PD photodetector 3 to detect the light wave signal in real time, and then analyze the signal at this time, compare and analyze the signal at this time to calculate the wavelength of the light wave, and then compare whether the wavelength is within the required range. When the thermistor detects a temperature increase, the temperature signal is transmitted to the control circuit. The control circuit calculates the offset angle △θ of the optical path according to the temperature compensation formula, and generates a corresponding control instruction to drive the micromotor to rotate, and synchronously controls the micromotor to repair the displacement offset. The micromotor drives the prism to rotate slightly in the opposite direction of the optical path offset angle, thereby offsetting the optical path offset caused by the temperature increase, restoring the optical path to a normal state, and ensuring stable signal transmission.

[0079] In the practical application of the present invention, firstly, according to the power of the laser and the working environment, the thermistor and the micro motor of suitable specifications are selected. The thermistor and the micro motor are installed at the bottom of the prism and fixed to the bottom of the module by gluing or other reliable methods. The control circuit is connected so that it can accurately receive the temperature signal of the thermistor and accurately control the rotation angle and direction of the micro motor.

[0080] During the operation of the laser, once the thermistor detects the optical path deviation caused by the temperature increase, the control circuit quickly calculates the compensation angle according to the temperature compensation formula and drives the micro motor to make corresponding fine adjustments to ensure that the optical path always remains normal, thereby ensuring stable signal transmission.

[0081] Please note that the above temperature compensation formula is only an example. The actual temperature compensation formula may be more complicated and needs to be determined according to the specific situation. When determining the temperature compensation formula, detailed experiments and data analysis are required to ensure the accuracy and effectiveness of the compensation. In addition, different prism devices may require different temperature compensation formulas, so in actual applications, optimization and adjustment are required for specific devices.

[0082] Furthermore, when the laser at the transmitting end generates heat, the light beam is conducted in the filter and prism, and the overall heat accumulates. The thermistor senses the temperature rise and calculates the angle offset through the optical path output. After receiving the offset information, the control circuit drives the micro motor to rotate slightly in the opposite direction of the angle, thereby compensating for the optical path offset and adjusting the optical path back to normal.

[0083] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0084] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A prism device with an optical path offset compensation function, characterized in that: The invention comprises a printed circuit board (1), wherein the printed circuit board (1) is provided with a first board (21), a second board (5), a thermistor feedback circuit unit (16), a central processing unit (17), a power supply (18), a spectroscopic prism optical signal feedback unit (19) and a PD photodetector (3), wherein the first board (21) is fixedly connected to the printed circuit board (1), and the first board (21) is provided with a light source (20) and a lens arranged in a one-to-one correspondence, the second board (5) is connected to the printed circuit board (1) via a micro-electromechanical system (7), and the first board (21) is connected to the printed circuit board (1) via a micro-electromechanical system (7). A prism (6) is arranged on the second plate (5); a filter arranged one-to-one with the lens is arranged at the incident end of the prism (6); a beam splitter prism (4) is arranged at the output end of the prism (6); a light wave is split into two by the beam splitter prism (4); one part of the light wave is transmitted to the collimator (2), and the other part is transmitted to the PD photodetector (3); the micro-electromechanical system (7), thermistor feedback circuit unit (16), the central processing unit (17), the power supply (18), the beam splitter prism optical signal feedback unit (19) and the PD photodetector (3) are electrically connected.

2. The prism device with optical path deviation compensation function according to claim 1, characterized in that: The micro-motor system (7) comprises a PCBA, on which a control component and a micro-mechanical resonant shaft device are arranged, the control component comprises a sensor module (7.2), a voltage control module (7.3), a storage module (7.4) and a transmission control module (7.5), the micro-mechanical resonant shaft device comprises a mechanical rotating central axis (7.1), the mechanical rotating central axis (7.1) is rotationally regulated by the voltage control module (7.3), two mirror-symmetrically arranged X-axis micro-resonant shafts (7.6) and two mirror-symmetrically arranged Y-axis micro-resonant shafts (7.7) are arranged on the mechanical rotating central axis (7.1), the central axis of the X-axis micro-resonant shaft (7.6) and the central axis of the Y-axis micro-resonant shaft (7.7) are perpendicular to each other, and the PCBA is also provided with an arc-shaped limiter (7.8) for the X-axis micro-resonant shaft (7.6) and the Y-axis micro-resonant shaft (7.7) to rotate in the axial direction.

3. The prism device with optical path deviation compensation function according to claim 1, characterized in that: The micro-motor system (7) drives the prism (6) connected above the mechanical shaft to slightly change in the three directions of X / Y / Z by controlling the rotation of the shaft and the resonant vibration of the shaft, and finally adjusts the incident angle of the prism (6) receiving the output light signal from the light transmission waveguide structure, so that the angle of the received incident light beam signal is different from that of the prism, thereby changing the wavelength of the reflected light signal.

4. The prism device with optical path deviation compensation function according to claim 1, characterized in that: The micro-motor system (7) adjusts the voltage through a voltage module circuit, and different voltages form different rotation axis displacement positions and different amplitudes of resonance axis change amplitudes, thereby controlling the displacement of the prism (6) in the X, Y, and Z directions in a linked manner.

5. A method for realizing optical path deviation compensation using the prism device according to any one of claims 1 to 4, characterized in that: Detect temperature changes caused by heating of electronic components; detect light path changes caused by temperature changes through photodetectors; feed back the detection results of photodetectors to the central processing unit; the central processing unit drives the thermistor feedback circuit to analyze temperature changes; based on the analysis results, drive the micromotor control unit through the feedback signal to control the prism displacement; after moving the prism, perform light path analysis and confirmation.

6. The method for compensating for optical path deviation according to claim 5, characterized in that: Establish a relationship model between temperature and optical path deviation angle; establish a relationship model between temperature and lens deformation; calculate the temperature compensation function according to the above model; and use the temperature compensation function to determine the displacement and angle adjustment of the prism.

7. The method for compensating for optical path deviation according to claim 6, characterized in that: The temperature change of the prism is sensed in real time by the thermistor; the change of the thermistor value is calculated by the comparison circuit of the thermistor feedback unit; the temperature change is calculated according to the change of the thermistor value; and the calculated temperature change data is transmitted to the central processing unit.

8. The method for compensating for optical path deviation according to claim 7, characterized in that: The central processing unit compares the original wavelength and the wavelength data of the light wave after the shift; when the wavelength shift exceeds the preset limit, the thermistor feedback circuit unit is triggered to work; and the control parameters of the micromotor control unit are calculated according to the output of the thermistor feedback circuit unit.

9. The method for compensating for optical path deviation according to claim 8, characterized in that: The central processing unit automatically calculates the displacement of the prism based on the calculated parameters; drives the micro-motor control unit to control the movement of the prism; after the prism moves, it drives the photoelectric detector again to detect the light wave signal in real time; analyzes the detected signal and calculates the wavelength of the light wave; Compare and calculate whether the wavelength is within the preset range. If not, repeat the compensation steps until the wavelength meets the requirements.

10. An optical module, characterized in that: It comprises a prism device with an optical path deviation compensation function as described in any one of claims 1 to 4.

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