CN117492219A - Single-camera-based pump detection system beam combination quality optimization device and method - Google Patents
Single-camera-based pump detection system beam combination quality optimization device and method Download PDFInfo
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Abstract
The invention relates to a single-camera-based pump detection system beam combination quality optimization device and method, comprising the following steps: the light beam directivity adjustment module comprises an electrically adjustable component for adjusting the directivity to be dimmed and a beam combination component for combining the dimmed and reference light beams; the first beam splitting component is used for splitting the light path of the combined beam into a first light path and a second light path; the beam directivity measuring module comprises a detachable filter component, a second beam splitting component, an optical path delay component, rotatable fan blades, a beam compression component and a camera; the second light path enters the second beam splitting assembly and is split into a first beam splitting beam and a second beam splitting beam with equal energy, the second beam splitting beam is delayed by the light path delay assembly and then runs parallel to the first beam splitting beam, and the fan blades rotate to enable the first beam splitting beam and the second beam splitting beam to be transmitted to the camera after passing through the beam compression assembly at different time sequences; and the control part is connected with the electric adjustable component and the camera. The invention has high time adjusting efficiency and high accuracy.
Description
Technical Field
The invention relates to the technical field of pump detection, in particular to a pump detection system beam combination quality optimization device and method based on a single camera.
Background
In the pump detection technology, the consistency of the directivity of the pump light and the detection light is ensured as much as possible, and better signal intensity can be obtained after higher beam combination quality is achieved. However, in the experimental process, due to reasons of wavelength switching, system vibration, temperature and humidity change and the like, one or two of the pumping light and the detection light can be caused to deviate in directivity, so that the signal intensity is reduced. In the conventional pump detection experiment, the directivity of one beam is usually adjusted to be combined with the other beam according to the signal intensity of each part in the optical path of the artificial detection before each experiment, or the directivity calibration step is omitted at the expense of a certain signal intensity. Therefore, the method has the following problems of low time efficiency and low accuracy of adjustment.
Disclosure of Invention
Therefore, the invention aims to solve the technical problems of low time adjustment efficiency and low adjustment accuracy in the prior art.
In order to solve the technical problems, the invention provides a pump detection system beam combination quality optimization device based on a single camera, which comprises:
the light beam directivity adjusting module comprises an electrically adjustable component for adjusting the directivity to be dimmed and a beam combining component for combining the dimmed and reference light beams;
the first beam splitting assembly is used for splitting the beam combining optical path into a first optical path for continuously executing the original pumping detection function and a second optical path for directivity monitoring;
the light beam directivity measuring module comprises a detachable light filtering component, a second beam splitting component, an optical path delay component, rotatable fan blades, a light beam compression component and a camera; the detachable filter component is used for filtering the reference light component in the combined light; the second light path enters the second beam splitting assembly and is split into a first beam splitting beam and a second beam splitting beam with equal energy, the second beam splitting beam is delayed by the light path delay assembly and then runs parallel to the first beam splitting beam, and the fan blades rotate to enable the first beam splitting beam and the second beam splitting beam to be transmitted to the camera after passing through the beam compression assembly at different time sequences; the beam compression assembly is used for carrying out beam shrinkage on the first beam splitting and the second beam splitting and reducing the distance between the first beam splitting and the second beam splitting;
and the control part is connected with the electric adjustable component and the camera.
In one embodiment of the invention, the light beam compression assembly comprises a first concave reflecting mirror and a second concave reflecting mirror which are arranged face to face, and light beams sequentially enter the first concave reflecting mirror and the second concave reflecting mirror and then strike a target surface of the camera to form light spots.
In one embodiment of the invention, the optical path delay assembly comprises at least one delay element and a third planar mirror, the second split beam sequentially entering the delay element and the third planar mirror.
In one embodiment of the invention, the delay element comprises a right angle reflecting prism, a first planar mirror, and a second planar mirror; the first plane reflecting mirror and the second plane reflecting mirror are arranged opposite to each other, and the second split beam sequentially enters the right angle reflecting prism, the first plane reflecting mirror, the second plane reflecting mirror, the right angle reflecting prism and the third plane reflecting mirror.
In one embodiment of the invention, the beam combining component is a dichroic mirror.
In one embodiment of the invention, the first beam splitting assembly is a non-polarizing beam splitting cube.
In one embodiment of the invention, the electrically tunable assembly includes a first tunable planar mirror and a second tunable planar mirror disposed in a face-to-face relationship, and is dimmed into the first tunable planar mirror, the second tunable planar mirror, and the beam combining assembly in sequence and then combined with a reference beam.
In one embodiment of the invention, the present application further includes a fine tuning compensation assembly for fine tuning the second optical path, the fine tuning compensation assembly including a third adjustable facet mirror and a fourth adjustable facet mirror disposed face-to-face, the second optical path passing through the third adjustable facet mirror and the fourth adjustable facet mirror in sequence and then entering the second beam splitting assembly.
In one embodiment of the invention, the second beam splitting assembly employs a non-polarizing beam splitting plate having a transmittance to reflectance of 50:50.
In one embodiment of the invention, the removable filter assembly includes a removable filter.
The invention also provides a single-camera-based pump detection system beam combination quality optimization method, which comprises the following steps:
step one, only opening reference light and removing the optical filter to measure the position of a reference light spot as a reference;
step two, simultaneously opening reference light and inserting a detachable optical filter after being dimmed;
capturing dimmed light spots (a first light spot and a second light spot) by a camera;
fourthly, the control part processes the spot information to calculate a spot center position difference value;
step five, inquiring the regulation mode;
step six, entering an automatic adjustment mode or a manual adjustment mode; an automatic adjustment mode, judging whether the deviation of the central position of the light spot is larger than a threshold value, if so, continuing to execute automatic adjustment, and if not, completing optimization; calculating the number of steps required by the actuator on the electrically adjustable component; the actuator executes the calculated step command (if the center position difference value is smaller than a certain threshold value, the beam combination quality is considered to meet the requirement, and the step command is not executed); waiting for the actuator to complete the stepping instruction to reach a static state; a manual adjustment mode for calculating the relative spatial angles of the dimmed reference light; manually adjusting the electrically adjustable assembly to reduce the space angle;
repeating the third step to the sixth step.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the single-camera-based pump detection system beam combination quality optimization device, the directivity deviation of the dimmed reference light can be quantitatively and real-timely monitored, and the dimmed directivity can be automatically and quickly adjusted in real time, so that the dimmed directivity is consistent with the reference light directivity, the time adjustment efficiency is high, the accuracy is high, and the beam combination quality is ensured. The system can be used as a module to be connected into an original system, and a part of light is split through the first beam splitting assembly and then enters the beam directivity measuring module, so that the arrangement and the work of the original system are not influenced when the measurement is carried out, and the cost is saved. The embodiment is provided with a beam compression assembly, which reduces the distance between two beams (a first split beam and a second split beam) on one hand, so that two light spots can strike the target surface of a camera; on the other hand, the size of the light beam can be reduced, so that the diameters of light spots (a first light spot and a second light spot) on the camera are small enough, and the center coordinate position of the light spot on the target surface of the camera can be conveniently analyzed, so that the structure of the application is further reduced; meanwhile, the invention can also multiplex one camera as a detector to monitor two light spots in a time-sharing way, and the combination of a two-dimensional light spot position detector or a four-quadrant photoelectric detector and a data acquisition card is not needed, so that the cost can be greatly reduced. The two light spot positions are monitored through the optical path delay assembly, so that the structure of the module is reduced, and the module is conveniently accessed into an original system.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which:
FIG. 1 is a schematic diagram of the result of a single camera based pump detection system beam combining quality optimization device in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of the rotation of the fan blades such that the first and second sub-beams impinge on the camera target surface;
fig. 3 is a flow chart of a method for optimizing beam combining quality of a single camera based pump detection system.
Description of the specification reference numerals: 100. a beam directivity adjustment module; 200. a beam directivity measurement module; 300. a fine tuning compensation assembly; 1. a first adjustable plane mirror; 2. a second adjustable plane mirror; 3. a dichroic mirror; 4. a non-polarizing beam splitting cube; 5. a third adjustable plane mirror; 6. a detachable optical filter; 7. a fourth adjustable plane mirror; 8. a non-polarizing beam splitter; 9. a fan blade; 10. a first planar mirror; 11. a second planar mirror; 12. a right angle reflecting prism; 13. a third plane mirror; 14. a rotating electric machine; 15. a first concave mirror; 16. a second concave mirror; 17. a camera; 18. a first light spot; 19. a second light spot; 20. and a control unit.
Detailed Description
The invention will be further described in connection with the accompanying drawings and specific examples which are set forth so that those skilled in the art will better understand the invention and will be able to practice it, but the examples are not intended to be limiting of the invention.
Referring to fig. 1 to 3, the invention provides a pump detection system beam combining quality optimization device based on a single camera, which comprises:
the beam directivity adjustment module 100 includes an electrically adjustable component for adjusting the directivity to be dimmed and a beam combining component for combining the dimmed and reference light beams;
the first beam splitting assembly is used for splitting the beam combining optical path into a first optical path for continuously executing the original pumping detection function and a second optical path for directivity monitoring;
the beam directivity measurement module 200 includes a detachable filter assembly, a second beam splitting assembly, an optical path delay assembly, a rotatable fan blade 9 (e.g., the fan blade 9 is connected with a rotating motor 14 for rotating the fan blade 9. In some other embodiments, the fan blade 9 may be replaced by other optical modulation structures, for example, an electrically controlled shutter configured as two periodic switches is placed on the first beam splitting path and the second beam splitting path, and only one of them can pass through the shutter at the same time under the control of a time sequence signal), a beam compression assembly, and a camera 17 (in some embodiments, the camera 17 can be replaced by a two-dimensional spot position sensor or a four-quadrant photodetector plus a data acquisition card; this can improve the response speed to some extent); the detachable filter component is used for filtering the reference light component in the combined light; the second light path enters the second beam splitting assembly and is split into a first beam splitting beam and a second beam splitting beam with equal energy, the second beam splitting beam is delayed by the light path delay assembly and then moves in parallel with the first beam splitting beam, the fan blade 9 is positioned between the first beam splitting beam and the second beam splitting beam, the rotation axis of the fan blade 9 is parallel to the first beam splitting beam and the second beam splitting beam, and thus the fan blade 9 rotates to enable the first beam splitting beam and the second beam splitting beam to strike the camera 17 after passing through the beam compression assembly at different time sequences; the beam compression assembly is used for carrying out beam shrinkage on the first beam splitting and the second beam splitting and reducing the distance between the first beam splitting and the second beam splitting;
the control part (which may be, but is not limited to, a general purpose computer, a single chip system, an embedded module, etc.) is connected to the electrically adjustable component and the camera 17.
The optimization method using the pump detection system beam combination quality optimization device based on a single camera comprises the following steps:
step one, an initial calibration mode. Only the reference light is turned on and the filter is removed to measure the reference spot position as a reference. That is, the reference light is turned on, the dimmed light is turned off, and the detachable filter assembly is removed, so that the reference light passes through the beam combining assembly and the beam directivity measuring module 200, and two light spots (reference light spots) are formed on the camera 17, and the center position of the light spot is recorded as a reference value by the control part, and the center position parameter of the reference light spot is recorded at this time; the calculation method of the center position of the light spot is to average the light intensity of each pixel on the target surface by multiplying the weighted value of the coordinates, namely, calculating the light intensity center of the pixel point on the light spot. The two-dimensional coordinate calculation formula of the light spot center is as follows:
equation 1
Equation 2
Wherein,and->Two-dimensional coordinates of the center of the light spot; />And->The resolution of the target surface of the camera, namely the number of pixels on two axes; />And->Pixel coordinates of the camera; />Is the pixel size of the camera; />Is the light intensity value of the pixel. The spot coordinates calculated according to this formula are a non-negative fraction, the unit and pixel size being the same, typically microns. The control section adjusts the camera exposure so that the maximum value of the received light intensities of all the pixel points does not exceed a threshold (typically 80% of the upper limit of the camera), otherwise the camera overexposure may affect the accuracy of the spot position calculation.
Calibration mode (step two to step six). Meanwhile, the reference light is turned on, the detachable optical filter is inserted after the reference light is dimmed, and at the moment, the original system can normally execute the pumping detection task. So that the reference light in the second optical path is detachableThe filter component filters out, only allows the dimmed light in the second light path to pass through, and the filtered second light path passes through the beam directivity measuring module 200 and forms light spots (the first light spot 18 and the second light spot 19) on the camera 17. The control part processes the spot information to calculate the spot center position difference. Inquiring the regulation mode; entering an automatic adjustment mode or a manual adjustment mode; an automatic adjustment mode, judging whether the deviation of the central position of the light spot is larger than a threshold value, if so, continuing to execute automatic adjustment, and if not, completing optimization; calculating the number of steps required by an actuator mounted on the electrically adjustable assembly; the actuator executes the calculated step command (if the center position difference value is smaller than a certain threshold value, the beam combination quality is considered to meet the requirement, and the step command is not executed); waiting for the actuator to complete the stepping instruction to reach a static state; a manual adjustment mode for calculating the relative spatial angles of the dimmed reference light; manually adjusting the electrically adjustable assembly reduces the space angle. Repeating the third to sixth steps, the spot position information is updated continuously both manually and automatically. The adjuster in the manual mode adjusts the relative azimuth angle to be reduced according to the continuously updated azimuth angle position as feedback; the automatic adjustment mode is continuously monitored and adjusted once when the difference value of the central positions of the relative light spots is larger than a certain threshold value. Specifically, the method comprises the following steps: the camera 17 obtains the two-dimensional center coordinate position of the reference light in the initial calibration modeAnd +.>The two light spot center coordinates can determine the directivity of the reference light and take the directivity as an adjusting target of the dimmed directivity. In the automatic calibration mode, two light beams which are subjected to light modulation and are split and respectively travel a far optical path and a near optical path are respectively and independently beaten on a camera target surface under the action of the fan blade 9 to form light spots, the control part 20 controls the camera 17 to acquire the light spots through a certain time sequence, and the center positions of the light spots are calculated according to the formula 1 and the formula 2, so that the two-dimensional positions of the center coordinates of the two light spots (namely the two-dimensional center coordinate position of the first light spot 18)>And the two-dimensional center coordinate position +.>A total of 4 parameters). The camera, at this time, the control part 20 calculates the spot center coordinate difference +.>. The control section 20 can control the light beam from the reference light and the spot center coordinate difference to be dimmed and the optical path difference of the first and second sub-beams>Calculating the relative spatial angle +.>And updates and displays on the screen of the control part 20 in real time; wherein->Refers to the projection of the relative spatial angles of two paths of light in the xz plane; />Refers to the projection of the relative spatial angle of two paths of light in the yz plane. In manual adjustment mode, the system continuously updates the difference of the spot center coordinates of the reference light and the light to be dimmed>And the relative spatial angle of the reference light and the light to be measured +.>. The experimenter can adjust the first adjustable plane reflector 1 and the second adjustable plane reflector 2 according to the relative space angle, so that the relative space angle is small enough to consider that the quality of two paths of photosynthetic beams is best.
In the automatic adjustment mode, the control unit 20 also calculates an electrically adjustable component (i.e. a first adjustable level) based on the reference light and the difference between the center coordinates to be dimmedThe number of steps that a total of four actuators mounted on the mirror 1 and the second adjustable mirror 2) need to travelWherein->The number of steps that need to be taken for the actuator in the first adjustable plane mirror 1 to adjust the x-direction angle; />The number of steps that need to be taken for the actuator in the first adjustable plane mirror 1 to adjust the y-direction angle; />The number of steps that need to be taken for the actuator in the second adjustable plane mirror 2 to adjust the x-direction angle; />The number of steps that need to be taken for the actuator in the second adjustable plane mirror 2 to adjust the y-direction angle. />Is +.>The value of which is determined by the system configuration parameters reflecting the linear effect of the four actuators on the coordinates of the four spots. In practical use, a calibration procedure is generally run in a calibration flow, and the numerical value of the matrix is determined through measurement; />Is a proportionality coefficient greater than 0 and less than 1, and is essentially the p parameter in the PID algorithm, the value of which is specified by the user, for regulating the smoothness and regulating speed of the negative feedback regulation. The system updates the spot center coordinate difference of the to-be-dimmed and the reference light once in each cycle +.>And therebyCalculating the number of steps a group of actuators need to move +.>And sent to the first and second adjustable plane mirrors 1, 2, and this process is repeated until the difference in the central coordinates of the spots is less than an error tolerance (specified by the user, as a minimum of one pixel size, increasing the error tolerance decreases the accuracy but increases the adjustment speed), at which point the directivities representing the dimmed and reference lights are substantially identical.
Therefore, the method and the device can quantitatively monitor the deviation between the dimmed reference light in real time, automatically and quickly adjust the directivity of the dimmed reference light in real time, so that the directivity of the dimmed reference light is consistent, the time adjustment efficiency is high, the accuracy is high, and the beam combination quality is ensured. The system can be used as a module to be connected into an original system, and a part of light is split through the first beam splitting assembly and then enters the beam directivity measuring module 200, so that the arrangement and the work of the original system are not affected while the measurement is carried out, and the cost is saved. The present embodiment provides a beam compression assembly that reduces the separation of the two beams (first and second split beams) so that both spots can strike the target surface of the camera 17; on the other hand, the size of the light beam can be reduced, so that the diameters of light spots (a first light spot 18 and a second light spot 19) on the camera 17 are small enough, and the central coordinate position of the light spot on the target surface of the camera 17 can be conveniently analyzed, so that the structure of the application is further reduced; meanwhile, the two light spots can be monitored by multiplexing the camera 17 as the detector in a time-sharing way, and the combination of a two-dimensional light spot position detector or a four-quadrant photoelectric detector and a data acquisition card is not needed, so that the cost can be greatly reduced. The two light spot positions are monitored through the optical path delay assembly, so that the structure of the module is reduced, and the module is conveniently accessed into an original system.
The fan blade 9 with the rotating motor 14 operates according to the principle shown in fig. 2. In a rotation period of the fan blade 9, when the second light spot 19 is blocked by the fan blade 9, the camera only collects the position of the first light spot 18 on the target surface of the camera 17; when the first light spot 18 is blocked by the fan blade 9, the camera only collects the position of the second light spot 19 on the target surface of the camera 17; in addition, there is a certain intermediate state, where one or both of the two light spots are blocked by the fan blade 9, and care needs to be taken to discard or not collect images in the time period according to the time sequence in the calculation process.
When the directivity of the pump light is fixed as the reference light and the directivity of the probe light is adjusted in real time as the dimmed light, the dichroic mirror 3 transmits the pump light and reflects the probe light, thereby realizing the beam combination of the pump probe light. If the directivity of the detection light is fixed as the reference light, and the directivity of the pump light is adjusted in real time as the dimmed light, the dichroic mirror 3 needs to transmit the detection light, reflect the pump light, and realize the beam combination of the pump detection light.
Further, the optical path delay assembly includes at least one delay element and a third plane mirror 13, and the second split beam sequentially enters the delay element and the third plane mirror 13. The delay member includes a right angle reflecting prism 12, a first plane reflecting mirror 10, and a second plane reflecting mirror 11; the first plane mirror 10 and the second plane mirror 11 are disposed to face each other, and the second split beam sequentially enters the right angle reflecting prism 12, the first plane mirror 10, the second plane mirror 11, the right angle reflecting prism 12, and the third plane mirror 13. The structure of the delay component in this embodiment makes the structure of the beam directivity measurement module 200 small and the arrangement more reasonable.
Further, the beam combining component is a dichroic mirror 3. In some embodiments, the dichroic mirror 3 is arranged at 45 ° tilt. In addition, the designed beam compression assembly uses reflective beam shrinking, has no chromatic dispersion, avoids errors caused by wavelength change, and can be used under the application working conditions of hyperspectral imaging and the like needing wavelength switching.
Further, the first beam splitting assembly is an unpolarized beam splitting cube 4. In some embodiments, the unpolarized beam splitting cube 4 is a 90:10 transmittance/reflectance cube whose wavelength band of use needs to include reference light and be dimmed. The reflected 10% beam is used for directivity detection (i.e., the second optical path), so that the position parameters of the first light spot 18 and the second light spot 19 can be measured by the beam directivity measurement module 200, and the control part calculates the directivity adjustment parameter based on the position parameter of the reference light spot, and controls the electrically adjustable mirror assembly to adjust until the reference light and the dimmed directivity are consistent.
Further, the electrically adjustable assembly comprises a first adjustable plane reflector 1 and a second adjustable plane reflector 2 which are arranged face to face, and the adjusted light sequentially enters the first adjustable plane reflector 1, the second adjustable plane reflector 2 and the beam combining assembly and then combines with a reference beam. In some embodiments, the first adjustable plane mirror 1 and the second adjustable plane mirror 2 are installed on a two-axis adjustment mirror bracket (mirror), and the two have an electronically controlled adjustment function, and the control part 20 can send a control instruction to realize the real-time two-dimensional directivity correction by dimming. For example, a piezoceramic motor may be employed as the actuator. As another example, a voice coil motor may be employed as the actuator. The first adjustable plane mirror 1 and the second adjustable plane mirror 2 are automatically adjusted in real time by sending control instructions through the control part 20, the singlechip and the like, so that the directivity of the light to be adjusted is adjusted.
Further, the present application further includes a fine adjustment compensation assembly 300 for fine adjustment of the second optical path, where the fine adjustment compensation assembly 300 includes a third adjustable plane mirror 5 and a fourth adjustable plane mirror 7 disposed face to face, and the second optical path sequentially passes through the third adjustable plane mirror 5 and the fourth adjustable plane mirror 7 and then enters the second beam splitting assembly. Specifically, the fine adjustment compensation component 300 is used for compensating and correcting the initial angle of the light entering the beam directivity measurement module 200. After the initial alignment setting is completed, the two frames need to be fixed without further adjustment.
Further, the second beam splitting component adopts a non-polarized beam splitting sheet 8, and the transmittance and reflectance of the non-polarized beam splitting sheet 8 are 50:50. This enables splitting into a first split beam and a second split beam of equal energy. In some embodiments, the non-polarizing beam splitter 8 is disposed at a 45 ° tilt. The unpolarized beam splitter 8 has the advantage of light weight and low cost.
Further, the beam compressing assembly includes a first concave mirror 15 and a second concave mirror 16 disposed face to face, and the light beam (the first split beam, the second split beam or the reference beam) sequentially enters the first concave mirror 15 and the second concave mirror 16 and then strikes the camera 17 to form a light spot (a first light spot 18, a second light spot 19 or a light-checking light spot). It is required that the focal lengths of the first concave mirror 15 and the second concave mirror 16 coincide, i.e. the distance between the first concave mirror 15 and the second concave mirror 16 is equal to the sum of the two focal lengths. The first concave mirror 15 and the second concave mirror 16 function: one is to change two parallel beams with larger spacing into parallel beams with smaller spacing, and simultaneously reduce the diameters of the respective beams. And secondly, the reduction multiple is equal to the ratio of the focal lengths of the first concave reflecting mirror 15 and the second concave reflecting mirror 16, so that the first light spot 18 and the second light spot 19 can strike the target surface of the camera 17.
Specifically, in order to separate two parallel lights by using a fan blade, the distance between the parallel lights is generally larger, and if one camera is directly multiplexed for observation, a camera with a larger target surface is required; on the other hand, if the diameter of the beam itself is large, it will also impose higher demands on the camera target surface. Considering that the device only needs to calculate the central coordinates of the light beams, a pair of concave reflectors are used for shortening the distance between two parallel light beams, and each light beam is contracted, so that the energy of each light beam is more concentrated, and the area of a light spot striking the target surface is smaller. Thus, the cost is lower and the structure is more compact; in addition, the first concave reflecting mirror 15 and the second concave reflecting mirror 16 are reflecting elements, have no dispersion, avoid the error caused by changing the wavelength, and can be used under the application working conditions of hyperspectral imaging and the like which need wavelength switching.
Further, the removable filter assembly includes a removable filter 6. At the initial calibration setting, the filter needs to be removed, at which point the reference light enters the beam directivity measurement module 200 and forms a reference beam at the camera 17 for reference. Specifically, the switching between the initial calibration and the automatic calibration modules can be realized through the detachable optical filter 6, so that the structure is simple and the cost is low. In the automatic calibration process, the filter needs to be installed, and only the light to be dimmed is allowed to pass through. In some embodiments, the predetermined angle of the detachable filter 6 is 3-5 °, so that an error that the ghost affects the directivity of the light beam from the calculation beam combining assembly to the first beam splitting assembly can be avoided.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious changes and modifications which are extended therefrom are still within the scope of the invention.
Claims (10)
1. A pump detection system beam combination quality optimization device based on a single camera is characterized in that: comprising the following steps:
the light beam directivity adjusting module comprises an electrically adjustable component for adjusting the directivity of the modulated light and a beam combining component for combining the modulated light and the reference light beam;
the first beam splitting assembly is used for splitting the beam combining optical path into a first optical path for continuously executing the original pumping detection function and a second optical path for directivity monitoring;
the light beam directivity measuring module comprises a detachable light filtering component, a second beam splitting component, an optical path delay component, rotatable fan blades, a light beam compression component and a camera; the detachable filter component is used for filtering reference light components in the combined light; the second light path enters the second beam splitting assembly and is divided into a first beam splitting beam and a second beam splitting beam with equal energy, the second beam splitting beam is delayed by the optical path delay assembly and then moves in parallel with the first beam splitting beam, and the fan blades rotate to enable the first beam splitting beam and the second beam splitting beam to strike the camera after passing through the beam compression assembly at different time sequences; the beam compression assembly is used for carrying out beam shrinkage on the first sub-beam and the second sub-beam and reducing the distance between the first sub-beam and the second sub-beam;
and the control part is connected with the electric adjustable component and the camera.
2. The single camera based pump detection system beam combining quality optimization apparatus of claim 1, wherein: the light beam compression assembly comprises a first concave reflecting mirror and a second concave reflecting mirror which are arranged face to face, and light beams sequentially enter the first concave reflecting mirror and the second concave reflecting mirror and then strike the target surface of the camera to form light spots.
3. The single camera based pump detection system beam combining quality optimization apparatus of claim 1, wherein: the optical path delay assembly comprises at least one delay component and a third plane mirror, and the second split beam sequentially enters the delay component and the third plane mirror.
4. A single camera based pump detection system beam combining quality optimization apparatus as claimed in claim 3, wherein: the delay component comprises a right angle reflecting prism, a first plane reflecting mirror and a second plane reflecting mirror; the first plane reflecting mirror and the second plane reflecting mirror are arranged opposite to each other, and the second split beam sequentially enters the right-angle reflecting prism, the first plane reflecting mirror, the second plane reflecting mirror, the right-angle reflecting prism and the third plane reflecting mirror.
5. The single camera based pump detection system beam combining quality optimization apparatus of claim 1, wherein: the beam combining component is a dichroic mirror.
6. The single camera based pump detection system beam combining quality optimization apparatus of claim 1, wherein: the first beam splitting assembly is a non-polarized beam splitting cube.
7. The single camera based pump detection system beam combining quality optimization apparatus of claim 1, wherein: the electric adjustable assembly comprises a first adjustable plane reflector and a second adjustable plane reflector which are arranged face to face, and the adjusted light sequentially enters the first adjustable plane reflector, the second adjustable plane reflector and the reference beam combining assembly and then combines with the reference beam.
8. The single camera based pump detection system beam combining quality optimization apparatus of claim 1, wherein: the optical system comprises a first optical path, a second optical path, a third adjustable plane reflector, a fourth adjustable plane reflector, a fine adjustment compensation component and a beam splitting component, wherein the fine adjustment compensation component is used for fine adjustment of the second optical path, the fine adjustment compensation component comprises the third adjustable plane reflector and the fourth adjustable plane reflector which are arranged face to face, and the second optical path sequentially passes through the third adjustable plane reflector and the fourth adjustable mirror and then enters the second beam splitting component.
9. The single camera based pump detection system beam combining quality optimization apparatus of claim 1, wherein: the second beam splitting component adopts a non-polarized beam splitting sheet, and the transmittance and reflectance of the non-polarized beam splitting sheet are 50:50.
10. A single-camera-based pump detection system beam combination quality optimization method is characterized by comprising the following steps of: the method comprises the following steps:
step one, only opening reference light and removing the optical filter to measure the position of a reference light spot as a reference;
step two, simultaneously opening reference light and inserting a detachable optical filter after being dimmed;
capturing a dimmed light spot by a camera;
fourthly, the control part processes the spot information to calculate a spot center position difference value;
step five, inquiring the regulation mode;
step six, entering an automatic adjustment mode or a manual adjustment mode; an automatic adjustment mode, judging whether the deviation of the central position of the light spot is larger than a threshold value, if so, continuing to execute automatic adjustment, and if not, completing optimization; calculating the number of steps required by an actuator mounted on the electrically adjustable assembly; the actuator executes the calculated step command; waiting for the actuator to complete the stepping instruction to reach a static state; a manual adjustment mode for calculating the relative spatial angles of the dimmed reference light; manually adjusting the electrically adjustable assembly to reduce the space angle;
repeating the third step to the sixth step.
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