CN112234425B - Crystal positioning correction method and device of optical parametric oscillator - Google Patents
Crystal positioning correction method and device of optical parametric oscillator Download PDFInfo
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- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
- H01S3/1083—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering using parametric generation
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3501—Constructional details or arrangements of non-linear optical devices, e.g. shape of non-linear crystals
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/39—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves
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Abstract
The invention discloses a crystal positioning correction method and a crystal positioning correction device of an optical parametric oscillator, wherein the method comprises the steps of predefining a positioning angle; acquiring driving information of a driving device, and judging that a positioning device performs positioning combination on the current switching device; when the driving device is detected to stop driving, acquiring the deflection angle of the pointer, calculating the difference value between the deflection angle and the positioning angle, and calculating the correction amount of the driving device according to the correction rule through the difference value; and adjusting the driving quantity of the driving device according to the correction quantity, and correcting the current position of the switching device so that the positioning device can be combined with the switching device in a positioning way. According to the invention, when the standby crystal is automatically switched in the laser system, the switching position of the crystal can be accurately positioned, and accurate correction is realized through interference drive, so that the positioning device can be stably positioned and combined with the crystal support frame.
Description
Technical Field
The invention relates to the technical field of optical parametric oscillators, in particular to a crystal positioning correction method and device of an optical parametric oscillator.
Background
An optical parametric oscillator mainly comprises two key parts: an optical resonator and a nonlinear optical crystal. The optical cavity is primarily intended to resonate with at least one of the two output lights. In the nonlinear optical crystal, the pump light, the signal light, and the idler light coincide with each other. The interaction of the three different frequency lights results in amplitude gain (parametric amplification) of the signal and idler waves and corresponding pump amplitude attenuation. The gain causes the resonant light wave (signal light or idler light or both) to oscillate in the cavity, compensating for the loss of the resonant light wave in oscillating back and forth. The losses include losses associated with the output coupling mirror extracting the desired output light wave. Because the loss is independent of the pump intensity, but the gain is dependent on the pump intensity, insufficient gain is not sufficient to support oscillation at low pump powers. Oscillation only occurs when the pump power reaches a certain threshold. Above the threshold power, the gain also depends on the amplitude of the resonant light wave. Therefore, in steady state operation, the amplitude of the resonant light wave depends on the state where the gain and the loss (a constant) are equal. The amplitude of the resonant wave and the intensity of the output light wave both increase with increasing pump light intensity. Common second-order nonlinear optical crystals include potassium dihydrogen phosphate (KDP), Ammonium Dihydrogen Phosphate (ADP), potassium dideuterium phosphate (KD x P), barium sodium niobate, etc. In order to change the frequency of the output light wave, the pump frequency or the nonlinear optical crystal with phase matching characteristic can be changed. The latter is achieved by changing the temperature or orientation of the nonlinear crystal or the period of quasi-phase matching.
During the use of nonlinear crystals, excessively high light intensities can momentarily damage the crystals, and unfortunately, to achieve sufficiently high conversion efficiencies, nonlinear crystals often need to be operated near their optical loss threshold. Even if the crystal is operated well below the threshold to prevent transient losses, some crystal materials exhibit sustained degradation, for example in the form of "grey tracking", in some parts of use. This phenomenon is particularly common when the crystal is operated in the ultraviolet band. Gradual degradation accumulates heat, and the generation of excessive heat can cause catastrophic damage instantaneously. In addition, hygroscopic crystal materials need to be kept in sufficiently dry air (or dry inert gas), and it is advantageous to keep such crystals operating at a higher temperature. Crystal operating temperatures below room temperature are often problematic, and in the event that the air is not dry enough, moisture in the air can condense on the crystal surface, focusing the laser more, and damaging the crystal.
In order to generate high power uv light, the nonlinear crystals become consumables, which need to be replaced frequently during the lifetime of the laser system, but temporary replacement of the crystals in the laser system is cumbersome and time-consuming.
The invention aims to provide a control method for positioning correction of a turntable type crystal switching device, which is suitable for realizing stable and accurate positioning through a mechanical principle and a control method, so that the standby crystal can be successfully switched and positioned.
Disclosure of Invention
The invention aims to provide a crystal positioning correction method and device of an optical parametric oscillator, which can accurately position the switching position of a crystal when a standby crystal is automatically switched in a laser system, and realize accurate correction through interference drive, so that a positioning device can be stably positioned and combined with a crystal support frame.
According to a first aspect of the present invention, a crystal positioning correction method for an optical parametric oscillator is provided, including:
predefining a positioning angle;
acquiring driving information of a driving device, and judging that a positioning device performs positioning combination on the current switching device;
when the driving device stops driving, acquiring the deflection angle of the pointer, calculating the difference value between the deflection angle and the positioning angle, and calculating the correction amount of the driving device according to the correction rule through the difference value;
and adjusting the driving quantity of the driving device according to the correction quantity, and correcting the current position of the switching device so that the positioning device and the switching device can complete positioning combination.
Further, the correction rule includes a correction amount calculation formula:
wherein,αcalculating and obtaining the absolute value of the difference value of the offset angle and the positioning angle;
lcalculating the correction value of the driving device;
Rthe parameters are fixed for the turntable radius of the switching device;
afixing parameters for the vertical distance between the rotating circle center and the collision point of the switching device when the deflection angle of the pointer is zero;
dthe parameters are fixed for the horizontal distance from the outer side wall of the switching device to the collision point when the deflection angle of the pointer is zero.
Further, "acquiring the driving information of the driving device, and determining that the positioning device performs positioning combination on the current switching device" specifically includes:
predefining a positioning position, wherein when the switching device is positioned at the positioning position, the positioning device can complete positioning on the switching device;
acquiring driving information of a driving device, and judging whether a positioning device performs positioning combination on the current switching device or not;
if the positioning device positions and combines the current switching device, the driving device stops driving when driving the current switching device to rotate to a positioning position;
if the positioning device does not position and combine the current switching device, the driving device drives the current switching device to rotate to the positioning position and continues to drive.
Further, the interference driving is performed when the driving device is detected to stop driving and the deflection angle of the pointer is zero, and the interference driving includes:
presetting interference rotation quantity;
when the driving device stops driving the current switching device, acquiring the deflection angle of the pointer;
when the deflection angle is zero, starting the driving device to drive the current switching device to continue to rotate by an interference rotation amount, and stopping driving;
and acquiring the deflection angle of the pointer again, and if the deflection angle is still zero, repeating the interference driving until the deflection angle is not zero.
Further, calculating the difference between the yaw angle and the positioning angle comprises:
presetting an error range;
when the difference value is within the error range, the current switching device and the positioning device can complete positioning combination, and the positioning device performs positioning combination on the current switching device and does not calculate correction quantity any more;
and when the difference value is out of the error range, calculating according to a correction rule to obtain a correction amount.
Further, adjusting the driving amount of the driving device according to the correction amount specifically includes:
acquiring the deflection direction of a pointer, and acquiring a correction quantity, wherein the correction quantity is the length of the side length of an arc;
starting the driving device to drive the current switching device to rotate by one correction amount, wherein the direction of the driving device is opposite to the deflection direction of the pointer;
stopping the drive device.
Further, the method also comprises the following steps:
re-acquiring the deflection angle of the pointer, executing the interference driving when the deflection angle is zero, otherwise, calculating the difference value between the deflection angle and the positioning angle;
when the difference value is within the error range, the positioning device can complete positioning combination with the current switching device;
otherwise, the obtained difference value is used for calculating the correction amount again according to the correction rule, and the current position of the switching device is corrected again.
According to a second aspect of the present invention, there is provided a crystal alignment correction apparatus for an optical parametric oscillator, comprising:
a first obtaining module: acquiring driving information of a driving device;
a first judgment module: judging that the positioning device performs positioning combination on the current switching device;
the first detection module: the operating state of the drive means is detected,
a second obtaining module: the deflection angle of the pointer is obtained,
a difference value calculation module: calculating a difference between the deflection angle and the positioning angle,
a data processing module: calculating the correction quantity of the driving device according to a correction rule through the difference value;
a drive adjustment module: and adjusting the driving quantity of the driving device according to the correction quantity, and correcting the current position of the switching device so that the positioning device and the switching device can complete positioning combination.
According to a third aspect of the present invention, there is provided an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method steps of any of the above first aspects when executing the computer program.
According to a fourth aspect of the present invention, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the method steps of any of the above first aspects.
The invention has the beneficial effects that:
1. the invention is suitable for the positioning correction of a rotating disc type crystal switching device, and the rotating disc rotates to a fixed positioning position to position and combine the selected switching device and the positioning device to realize the switching of the standby crystal; and each switching device is provided with a firing pin connecting piece at the same position, a vertical pointer is arranged at the positioning position to be in contact with the firing pin connecting piece so as to generate a deflection angle, and whether the switching device is rotated to a fixed positioning position by the driving amount of the driving device is further measured through the obtained deflection angle, so that positioning correction is realized, and the positioning device and the switching device can be positioned and combined.
2. In the embodiment of the invention, when the deflection angle is zero, the interference drive is adopted to correct the problem defect when the rotation quantity is insufficient, the position of the switching device is repeatedly corrected through the circulating interference drive until the deflection angle of the firing pin connecting piece and the pointer of the switching device meets the requirement, and the positioning device can position and combine the switching device.
3. After the difference is obtained, the correction amount is calculated through the correction rule, the deflection direction of the pointer is obtained at the same time, and the corrected driving direction of the driving device is adjusted to be opposite to the deflection direction of the pointer, so that the position of the switching device is corrected.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the invention. For a person skilled in the art, other figures can be derived from these figures without inventive effort.
Fig. 1 is a flowchart of a crystal positioning correction method for an optical parametric oscillator according to an embodiment of the present invention;
FIG. 2 is a block diagram of a crystal alignment correction apparatus for an optical parametric oscillator according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a crystal switching device suitable for an optical parametric true oscillator according to an embodiment of the present invention;
fig. 4 is a schematic top view of a crystal switching device suitable for an optical parametric oscillator according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a positioning correction pointer of a crystal switching device suitable for an optical parametric oscillator according to an embodiment of the present invention;
FIG. 6 illustrates a synchronous rotation transmission shaft according to an embodiment of the present invention;
fig. 7 is a first schematic diagram illustrating derivation of a calculation formula of a correction rule in a crystal positioning correction method for an optical parametric oscillator according to an embodiment of the present invention;
fig. 8 is a second schematic diagram illustrating derivation of a calculation formula of a correction rule in a crystal positioning correction method for an optical parametric oscillator according to an embodiment of the present invention;
fig. 9 is a structural diagram of an electronic device according to an embodiment of the present invention.
In the figure: 1. a switching device; 2. a drive plate; 3. a striker linkage; 4. a positioning device; 5. an adapter; 6. a drive device; 7. a pointer; 8. a return spring.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is to be understood that the drawings in the following description are merely exemplary of the invention and that other drawings and embodiments can be derived by those skilled in the art without undue burden. The designation of the design orientation merely indicates the relative positional relationship between the respective members, not the absolute positional relationship.
The embodiment of the invention provides a crystal positioning correction method and a crystal positioning correction device of an optical parametric oscillator, which are suitable for positioning correction of a rotating disc type crystal switching device in the optical parametric oscillator, so that the crystal switching device can be stably positioned and combined with the positioning device, and the crystal switching is completed. Referring to fig. 3, 4, 5, and 6, a rotating disc type crystal switching device according to an embodiment of the present invention is shown, in which a switching device 1 is provided with a plurality of sub-discs, each sub-disc is provided with a striker connecting member 3, the relative positions of the striker connecting members 3 on each sub-disc are the same, the switching device 1 is located above a driving disc 2 and coaxially and rotatably connected to the driving disc 2, so that when the driving device 6 drives the driving disc 2, the driving disc 2 can drive the switching device 1 above to synchronously rotate, so that the striker connecting member 3 of each sub-disc is rotated to the position of a pointer 7 and collides with the pointer 7, thereby the pointer 7 generates an angular deflection. When the positioning device 4 needs to form positioning combination with one of the branch discs in the switching device 1, the driving device 6 drives the transmission disc 2 to rotate the branch disc to the position of the pointer 7, and the positioning position can be preset, so that the driving device 6 stops driving when rotating the branch disc to the positioning position. It will be appreciated that the drive of the drive means 6 has a certain error, and therefore the sub-disc will have a certain offset from the predetermined positioning position, and the striker linkage 3 will have a certain angle of deflection with the pointer 7, and the drive of the drive means 6 can be modified according to this angle of deflection, so that the positioning means 4 can be brought into positioning engagement with the sub-disc of the switching device 1.
It can be understood that the firing pin connecting piece 3 and the sub-disc of the switching device 1 are fixedly connected, a detachable adapter piece 5 can be arranged on the firing pin connecting piece 3, and the adapter piece 5 is used for fixing the standby crystal, so that the standby crystal can be replaced by detaching the adapter piece 5; the positioning means 4 may also be in positioning engagement with the striker link 3.
In the embodiment of the invention, the pointer 7 can automatically rotate to deflect when pushed by the firing pin connecting piece 3, when the position of the firing pin connecting piece 3 rotates, the pointer 7 rotates along with the firing pin connecting piece, therefore, the pointer 7 has the function of automatic reset, a synchronous rotating transmission shaft as shown in fig. 6 can be arranged, a plane groove is arranged at the non-rotating part of the transmission shaft, the pointer 7, a clamping piece of a reset spring 8 and a deflection sensor are arranged in the plane groove, the clamping piece can be driven to rotate together when the pointer 7 deflects, when the external force applied to the pointer 7 changes, the reset spring 8 can pull the clamping piece to rotate the pointer 7 along with the pointer, and when the external force disappears, the pointer is reset to the initial position.
According to a first aspect of the present invention, there is provided a flowchart of a crystal alignment correction method for an optical parametric oscillator, as shown in fig. 1, including:
step S101: the positioning angle is predefined.
In the embodiment of the present invention, unlike the idealised combination of dot lines, the pointer is angularly deflected by the size of the striker link when the switching device is completely in the positioning position due to the size of the striker link, and therefore the positioning angle is set to eliminate the size influence.
Step S102, acquiring the driving information of the driving device, and judging that the positioning device performs positioning combination on the current switching device.
In the embodiment of the invention, the positioning position is predefined, and when the switching device is positioned at the positioning position, the positioning device can complete positioning on the switching device; the positioning position is the target position of the switching device.
Acquiring driving information of a driving device, and judging whether a positioning device performs positioning combination on the current switching device or not; drive information is acquired, the drive information including a drive amount of the drive device and a relative position of a subdisc of the switching device to be positioned by the positioning device.
If the positioning device positions and combines the current switching device (such as the third minute disc), the driving device stops driving when the current switching device (the third minute disc) is driven to rotate to the positioning position by the driving device; the third dial in the switching device is selected for positioning and coupling, and it is confirmed that the position of the third dial is within the positioning position.
If the positioning device does not perform positioning combination on the current switching device (such as the first sub-disc), the driving device continues to drive when the current switching device (the first sub-disc) is driven to rotate to the positioning position; and selecting the sub-disc (such as the third sub-disc) of the switching device for positioning combination, and if the sub-disc is not the sub-disc (the third sub-disc), continuing driving.
It can be understood that a plurality of sub-discs are arranged on the switching device, as shown in fig. 4, when the first sub-disc and the second sub-disc of the switching device are required to be combined with the positioning of the third sub-disc, the driving device does not stop driving when the first sub-disc and the second sub-disc of the switching device rotate to the positioning positions, and the driving is not stopped until the third sub-disc is driven to the positioning positions.
Step S103: when the driving device stops driving, acquiring the deflection angle of the pointer, calculating the difference value between the deflection angle and the positioning angle, and calculating the correction quantity of the driving device according to the correction rule through the difference value.
In the embodiment of the present invention, referring to fig. 7 and 8, the calculation formula of the correction rule is derived, wherein the deflection plane of the pointer is perpendicular to the rotation plane of the switching device, and during the formula derivation,bfor a common parameter connecting the deflection angle of the firing pin connecting piece of the switching device in the horizontal direction and the deflection angle of the pointer in the vertical direction, the position offset of the switching device, namely the driving correction of the driving device, can be deduced through a trigonometric function formula and an arc length formula. Wherein,cthe maximum value of (A) is the length from the rotating circle center of the pointer to the tip end of the pointer;βis the angle of deflection of the switching device relative to the positioning position.
The correction amount calculation formula of the correction rule is as follows:
wherein,αcalculating and obtaining the absolute value of the difference value of the offset angle and the positioning angle;
lcalculating the correction value of the driving device;
Rthe parameters are fixed for the turntable radius of the switching device;
afixing parameters for the vertical distance between the rotating circle center and the collision point of the switching device when the deflection angle of the pointer is zero;
dthe parameters are fixed for the horizontal distance from the outer side wall of the switching device to the collision point when the deflection angle of the pointer is zero.
In the embodiment of the invention, when the deflection angle of the pointer is acquired, the deflection angle of the pointer may be zero, and at this time, the relative position relationship between the switching device and the positioning device cannot be judged, so that interference driving is required, that is, the driving amount is actively increased, so that the switching device passes over the positioning device, and the relative position relationship between the switching device and the positioning device is reliably judged. The interference drive mainly comprises:
presetting interference rotation quantity;
when the driving device stops driving the current switching device, acquiring the deflection angle of the pointer;
when the deflection angle is zero, starting the driving device to drive the current switching device to continue to rotate by an interference rotation amount, and stopping driving;
and acquiring the deflection angle of the pointer again, and if the deflection angle is still zero, repeating the interference driving until the deflection angle is not zero.
When the deflection angle is not zero, it can be determined that the current switching device has entered the range of the positioning device, and the relative position between the current switching device and the positioning device can be determined according to the difference value, so as to determine whether positioning combination can be completed.
In the embodiment of the invention, an error range can be preset for the difference value between the deflection angle and the positioning angle so as to actively judge the direct goodness of fit between the initial position and the positioning position of the switching device, and when the goodness of fit meets the requirement of the positioning error, the positioning combination can be directly carried out without carrying out subsequent steps, and the method mainly comprises the following steps:
presetting an error range;
when the difference value is within the error range, the current switching device and the positioning device can complete positioning combination, and the positioning device performs positioning combination on the current switching device and does not calculate correction quantity any more;
and when the difference value is out of the error range, calculating according to a correction rule to obtain a correction amount.
Step S104: and adjusting the driving quantity of the driving device according to the correction quantity, and correcting the current position of the switching device so that the positioning device and the switching device can complete positioning combination.
In the embodiment of the invention, the driving amount of the driving device is corrected, and not only the correction amount is obtained, but also the driving direction is determined, and the driving direction of the correction amount is opposite to the deflection direction of the pointer. The method mainly comprises the following steps:
acquiring the deflection direction of a pointer, and acquiring a correction quantity, wherein the correction quantity is the length of the side length of an arc;
starting the driving device to drive the current switching device to rotate by one correction amount, wherein the direction of the driving device is opposite to the deflection direction of the pointer;
stopping the drive device.
According to a second aspect of the present invention, there is provided a block diagram of a crystal alignment correction apparatus for an optical parametric oscillator, including:
the first acquisition module 11: acquiring driving information of a driving device;
the first judgment module 12: judging that the positioning device performs positioning combination on the current switching device;
the first detection module 13: the operating state of the drive means is detected,
the second acquisition module 14: the deflection angle of the pointer is obtained,
the difference value calculation module 15: calculating a difference between the deflection angle and the positioning angle,
the data processing module 16: calculating the correction quantity of the driving device according to a correction rule through the difference value;
the drive adjustment module 17: and adjusting the driving quantity of the driving device according to the correction quantity, and correcting the current position of the switching device so that the positioning device and the switching device can complete positioning combination.
It is to be understood that the apparatuses provided in the embodiments of the present invention are all suitable for the above method, and specific functions may refer to the above method flow, which is not described herein again.
Fig. 9 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention. The electronic device may include: a processor (processor), a Communications Interface (Communications Interface), a memory (memory), and a Communications bus. The processor, the communication interface and the memory complete mutual communication through the communication bus, and the processor can call the logic instruction in the memory to execute the following method: after code scanning information is acquired, jumping the mobile phone interface into a login interface; after login information is acquired, importing the login information into a preset first database, and judging whether the login information is matched with the code scanning information; if the login information is matched with the code scanning information, skipping the mobile phone interface to a state interface; when the information of starting to discharge is acquired, determining the state of the sewage tank and performing sewage discharge work; and when the emission stopping information is acquired, ending the pollution discharge work.
The logic instructions in the memory may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-described aspects may be implemented individually or in various combinations, and such variations are within the scope of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the specific embodiments of the invention be limited to these descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (7)
1. A crystal positioning correction method of an optical parametric oscillator is characterized by comprising the following steps:
predefining a positioning angle;
predefining a positioning position, wherein when the switching device is positioned at the positioning position, the positioning device can complete positioning on the switching device;
acquiring driving information of a driving device, and judging whether a positioning device performs positioning combination on the current switching device or not;
if the positioning device positions and combines the current switching device, the driving device stops driving when driving the current switching device to rotate to a positioning position;
if the positioning device does not perform positioning combination on the current switching device, the driving device continues to drive when driving the current switching device to rotate to the positioning position;
when the driving device is detected to stop driving, acquiring that the deflection angle of the pointer is zero, and performing interference driving, wherein the interference driving comprises the following steps:
presetting interference rotation quantity;
when the driving device stops driving the current switching device, acquiring the deflection angle of the pointer;
when the deflection angle is zero, starting the driving device to drive the current switching device to continue to rotate by an interference rotation amount, and stopping driving;
obtaining the deflection angle of the pointer again, and if the deflection angle is still zero, repeating the interference driving until the deflection angle is not zero;
calculating a difference value between the deflection angle and the positioning angle, and calculating a correction amount of a driving device according to a correction rule through the difference value;
and adjusting the driving quantity of the driving device according to the correction quantity, and correcting the current position of the switching device so that the positioning device and the switching device can complete positioning combination.
2. The method of claim 1, wherein the modification rules include a modification calculation formula:
wherein,αcalculating and obtaining the absolute value of the difference value of the offset angle and the positioning angle;
lcalculating the correction value of the driving device;
Rthe parameters are fixed for the turntable radius of the switching device;
afixing parameters for the vertical distance between the rotating circle center and the collision point of the switching device when the deflection angle of the pointer is zero;
dthe parameters are fixed for the horizontal distance from the outer side wall of the switching device to the collision point when the deflection angle of the pointer is zero.
3. The method of claim 1, wherein calculating the difference between the deflection angle and the orientation angle comprises:
presetting an error range;
when the difference value is within the error range, the current switching device and the positioning device can complete positioning combination, and the positioning device performs positioning combination on the current switching device and does not calculate correction quantity any more;
and when the difference value is out of the error range, calculating according to a correction rule to obtain a correction amount.
4. The method of claim 3, wherein adjusting the driving amount of the driving device according to the correction amount comprises:
acquiring the deflection direction of a pointer, and acquiring a correction quantity, wherein the correction quantity is the length of the side length of an arc;
starting the driving device to drive the current switching device to rotate by one correction amount, wherein the direction of the driving device is opposite to the deflection direction of the pointer;
stopping the drive device.
5. The crystal positioning correction method of an optical parametric oscillator according to claim 4, further comprising:
re-acquiring the deflection angle of the pointer, executing the interference driving when the deflection angle is zero, otherwise, calculating the difference value between the deflection angle and the positioning angle;
when the difference value is within the error range, the positioning device can complete positioning combination with the current switching device;
otherwise, the obtained difference value is used for calculating the correction amount again according to the correction rule, and the current position of the switching device is corrected again.
6. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the computer program implements the steps of a method of crystal positioning correction of an optical parametric oscillator according to any of claims 1 to 5.
7. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the steps of a crystal positioning correction method for an optical parametric oscillator according to any of claims 1 to 5.
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