Optical power meter calibration fixture, method and apparatus

Abstract

The application relates to an optical power meter correction tool, a correction method and a device. In one embodiment, a positioning plate with positioning holes and a locking mechanism connected to the positioning plate are arranged on the frame of the correction tool. The positioning plate can be moved according to the landing point of the light projected by the light source, and then the locking mechanism is locked. In this way, the positioning plate cannot move, the light projected by the light source always lands at the specified position in the positioning hole, and different optical power meter probes only need to be placed in the positioning hole, so that different optical power meters can collect the same light spot when measuring the light output power, the standard optical power meter used for measurement and the optical power meter to be corrected are completely the same in the working environment, errors caused by other factors in the correction process are reduced, and the correction accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of optical power measurement, in particular to an optical power meter correction tool, correction method and device. BACKGROUND

[0002] With the rapid development of laser technology, more and more fields begin to combine laser technology to form iteration, especially in the recently emerging 3D printing field, the 3D printer using face exposure forming rapidly opens the market with higher precision and more mature technology.

[0003] At present, it is very important to detect the light output power of the face exposure type 3D printer, because whether the light output power of the optical machine meets the standard will directly affect the precision of 3D printing, and even cause serious errors and damage to the printed products. The existing method often needs to purchase expensive and professional standard optical power meters to detect the light output power. This method is costly and it is difficult to buy an optical power meter that meets the requirements in time. In order to reduce the overall cost, a common power meter or a self-made power meter with lower cost can also be used for detection, but such power meters are generally produced in batches, and the quality control is not strict. The core components of such power meters are relatively low-end, and the quality often does not meet the standard, resulting in a large difference between the detection value and the standard optical power meter, which is easy to cause hidden troubles and has limited application range.

[0004] Therefore, there is an urgent need for a method to solve the problem of non-standard detection precision of optical power meters. SUMMARY

[0005] Therefore, it is necessary to provide an optical power meter correction tool, correction method and device to solve the above technical problems. The technical solutions of the present disclosure are as follows:

[0006] According to a first aspect of the embodiments of the present disclosure, an optical power meter correction tool is provided, comprising:

[0007] a rack, wherein a locking mechanism is arranged on the rack, and the locking mechanism is used to control the movement of a positioning plate connected to the locking mechanism until the light projected by a light source falls into a positioning hole on the positioning plate;

[0008] a light source arranged on the rack and used to project light under different working current drives;

[0009] a positioning plate arranged on the rack, wherein the positioning plate is connected to the locking mechanism, and the positioning plate is located in the direction of the light projected by the light source; the positioning plate is further provided with a positioning hole, and the positioning hole is used to place a probe of an optical power meter.

[0010] In one embodiment, the positioning plate is further provided with an auxiliary hole.

[0011] In one of the embodiments, the positioning hole has a plurality of concentric circular steps with different diameters.

[0012] According to a second aspect of the embodiments of the present disclosure, a method for calibrating an optical power meter is provided, which is applied to the above-mentioned calibration tool, and the method comprises the following steps:

[0013] placing a probe of a standard optical power meter into the positioning hole;

[0014] driving the light source according to a preset working current list, and sequentially measuring the output optical power of the light projected by the light source under different working current driving through the standard optical power meter to obtain corresponding standard optical power values;

[0015] after obtaining the corresponding standard optical power values, removing the probe of the standard optical power meter, and placing a probe of a to-be-calibrated optical power meter into the positioning hole;

[0016] driving the light source according to the working current list, and sequentially measuring the output optical power of the light projected by the light source under different working current driving through the to-be-calibrated optical power meter to obtain corresponding measured optical power values;

[0017] performing a fitting operation on the standard optical power values and the measured optical power values to obtain a fitting coefficient;

[0018] recording the fitting coefficient into the to-be-calibrated optical power meter, and the fitting coefficient is used for correcting the measured values according to the fitting coefficient after each measurement of the to-be-calibrated optical power meter.

[0019] In one of the embodiments, before placing the standard optical power meter into the positioning hole, the method further comprises:

[0020] placing a semi-transparent light sheet into the positioning hole;

[0021] starting the light source to project light onto the semi-transparent light sheet to form a light spot on the semi-transparent light sheet;

[0022] moving the positioning plate until the light spot is located at a specified position of the positioning hole, and then locking the locking mechanism;

[0023] removing the semi-transparent light sheet.

[0024] In one of the embodiments, after recording the fitting coefficient into the to-be-calibrated optical power meter, the method further comprises:

[0025] driving the light source according to the working current list again, and performing power measurement through the to-be-calibrated optical power meter to obtain a corrected optical power value of the to-be-calibrated optical power meter after correcting the measured values according to the fitting coefficient;

[0026] calculating an error of the corrected optical power value and the standard optical power value;

[0027] comparing the error with a preset standard to determine whether the optical power meter to be corrected is qualified.

[0028] In one of the embodiments, the fitting operation is one of polynomial fitting and Bezier fitting.

[0029] According to a third aspect of the embodiments of the present disclosure, an optical power meter correction device is further provided, comprising:

[0030] A first probe alignment module is configured to place a probe of a standard optical power meter into a positioning hole.

[0031] A current acquisition module is configured to acquire a preset working current list.

[0032] A first power acquisition module is configured to acquire standard optical power values measured by the standard optical power meter according to different working currents in the working current list.

[0033] A second probe alignment module is configured to remove the probe of the standard optical power meter and place a probe of an optical power meter to be corrected into the positioning hole.

[0034] A second power acquisition module is configured to acquire measured optical power values measured by the optical power meter to be corrected according to different working currents in the working current list.

[0035] A fitting module is configured to perform a fitting operation on the standard optical power values and the measured optical power values to obtain fitting coefficients.

[0036] A measurement correction module is configured to correct the measured values of the optical power meter to be corrected according to the fitting coefficients.

[0037] According to a fourth aspect of the embodiments of the present disclosure, a computer device is further provided, comprising a memory and a processor, and the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0038] According to a fifth aspect of the embodiments of the present disclosure, a computer readable storage medium is further provided, and the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the above method.

[0039] In the technical scheme provided by the embodiments of the present disclosure, the positioning plate with the positioning hole and the locking mechanism connected with the positioning plate are arranged on the rack of the correction tool, so that the positioning plate can be moved according to the landing point of the light projected by the light source, and then the locking mechanism is locked. In this way, the positioning plate cannot be moved, the light projected by the light source always lands at the specified position in the positioning hole, and only by placing different optical power meter probes into the positioning hole, the same light spot can be collected by different optical power meters when measuring the light output power, so that the standard optical power meter and the optical power meter to be corrected are completely the same in the working environment, the error caused by other factors in the correction process is reduced, and the correction accuracy is improved.

[0040] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical scheme in the embodiments of the present specification or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present specification, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0042] Figure 1 FIG. 1 is a structural schematic diagram of an optical power meter correction tool in an embodiment;

[0043] Figure 2 FIG. 2 is a structural schematic diagram of a positioning plate in an embodiment;

[0044] Figure 3 FIG. 3 is a structural schematic diagram of a positioning plate in another embodiment;

[0045] Figure 4 FIG. 4 is a flowchart of an optical power correction method in an embodiment;

[0046] Figure 5 FIG. 5 is a flowchart of calibrating the position of the positioning hole in an embodiment;

[0047] Figure 6 FIG. 6 is a flowchart of verifying the corrected optical power meter in an embodiment;

[0048] Figure 7 FIG. 7 is a schematic diagram of an optical power meter correction device in an embodiment;

[0049] Figure 8 FIG. 8 is a schematic diagram of the internal structure of a computer device in an embodiment;

[0050] Figure 9FIG. 1 is a schematic diagram of an internal structure of a computer device according to another embodiment.

[0051] Reference Signs:

[0052] 10 - rack; 20 - light source; 30 - positioning plate; 31 - positioning hole; 32 - auxiliary hole; 40 - locking mechanism; 311 - first positioning step; 312 - second positioning step; 502 - first probe alignment module; 504 - current acquisition module; 506 - first power acquisition module; 508 - second probe alignment module; 510 - second power acquisition module; 512 - fitting module; 514 - correction module. DETAILED DESCRIPTION

[0053] In order for those skilled in the art to better understand the technical solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the drawings.

[0054] It should be noted that the terms "first", "second", and the like in the description and claims of the present disclosure and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented in an order other than that illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present disclosure. Rather, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims. The terms "comprise", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, product or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or other elements inherent to such a process, method, product or apparatus. Without more limitations, it does not exclude the presence of other same or equivalent elements in the process, method, product or apparatus comprising the elements. For example, if the terms first, second, etc. are used to denote names, they do not mean any specific order.

[0055] In the present disclosure, when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" or "linked" to another element, it can be directly connected to the other element or there can be an intervening element, and should be interpreted broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0056] The terms "vertical", "horizontal", "left", "right", "upper", "lower", "front", "rear", "circumferential", "direction of travel" and similar expressions used herein are based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0057] Unless otherwise defined, the technical and scientific terms used herein can be the same as understood by one of ordinary skill in the art to which the present application belongs. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or", "and / or", "at least one of" used herein includes any and all combinations of one or more of the associated listed items. It should be noted that the connection, connection, etc. described in the present disclosure can be directly connected through the interface or pin between devices, or can be connected through a lead.

[0058] The existing optical power meter often needs to be calibrated or corrected in advance due to the uncertainty of accuracy. When correcting the optical power meter, a fixed light source is usually set to stabilize the light measurement of the optical power meter, and then the probe of a standard optical power meter is placed on the light path of the light source. The standard optical power meter measures the output light power through the probe and outputs the standard light power value. This standard optical power meter can be a high-precision optical power meter that meets the standard. After obtaining the standard light power value, the ordinary optical power meter to be measured or corrected is placed in the position where the standard optical power meter is measured, and the measurement value of the ordinary optical power meter is recorded and compared with the standard value. The correction is made according to the comparison result. However, this method has many uncontrollable factors in the actual correction process, such as the inability to guarantee that the light spots collected by the standard optical power meter and the ordinary optical power meter are the same, which seriously affects the accuracy of the correction.

[0059] According to a first aspect of the embodiments of the present disclosure, a correction tool can be applied in the above correction scene. As shown in the figure, an optical power meter correction tool includes a rack 10, a light source 20, a positioning plate 30, and a locking mechanism 40. The positioning plate 30 is provided with a positioning hole 31, which can be used to place the probe of the optical power meter. Figure 1

[0060] The light source 20 is arranged on the rack 10 and can project light in a specified direction under different working current driving.

[0061] ​The light source 20 can be a light engine of a printer, and the specific shape and structure of the rack 10 do not affect the scheme. In alternative embodiments, the rack 10 can be of any shape and structure without affecting the light source 20 to project light to the positioning plate 30.

[0062] The positioning plate 30 is connected to the rack 10 through the locking mechanism 40, and the positioning plate 30 is located in the direction of the light source 20 to project light. When the locking mechanism 40 is loosened, the positioning plate 30 can move on the rack 10 to adjust the position of the positioning plate 30 so that the light projected by the light source 20 falls on the specified position in the positioning hole 31. When the locking mechanism 40 is locked, the positioning plate 30 is fixed on the rack 10 and cannot move.

[0063] Alternatively, the rack 10 includes a base and a platform parallel to the base, the light source 20 is arranged on the base of the rack 10, and the light source 20 can project light upward, and the platform parallel to the base is located above the light source 20. The positioning plate 30 is placed on the platform parallel to the base through the locking mechanism 40, and can move when the locking mechanism 40 is loosened, and is fixed when the locking mechanism 40 is locked.

[0064] It should be noted that the positions of the light source 20 and the positioning plate 30 are not fixed, as long as the positioning plate 30 is located in the direction of the light source 20 to project light, and the positioning plate 30 is fixed by the locking mechanism 40 after moving to the specified position, the purpose of the scheme can be achieved, and the specific position and placement of the light source 20 and / or the positioning plate 30 are not limited. For example, the light source 20 can be placed at the bottom of the rack 10 to project light from bottom to top, or placed above the rack 10 to project light from top to bottom, or placed at the side of the rack 10 to project light horizontally or obliquely. In some other embodiments, the light source 20 can also be an external independent light source and not arranged on the rack 10. Similarly, the positioning plate 30 can be placed horizontally, vertically, or obliquely, as long as it is located in the direction of the light source 20 to project light, which is within the scope of the scheme.

[0065] In the technical scheme provided by the embodiments of the present disclosure, the positioning plate 30 with the positioning hole 31 and the locking mechanism 40 connected to the positioning plate 30 are arranged on the rack 10 of the correction tool, so that the positioning plate 30 can move according to the falling point of the light projected by the light source 20, and then the locking mechanism 40 is locked. In this way, the positioning plate 30 cannot move, the light projected by the light source 20 always falls on the specified position in the positioning hole 31, and different optical power meters can be placed in the positioning hole 31, so that the same light spot can be collected when different optical power meters measure the output optical power, ensuring that the standard optical power meter and the optical power meter to be corrected are completely the same in the working environment, reducing the error caused by other factors in the correction process, and improving the accuracy of the correction.

[0066] In one embodiment, the positioning hole 31 can be circular.

[0067] Most of the probes of optical power meters are circular. The positioning hole 31 is circular to facilitate the placement of the probe of the optical power meter.

[0068] In one embodiment, as shown in Figure 2 The positioning plate 30 is further provided with an auxiliary hole 32.

[0069] The auxiliary hole 32 can be used to fix the positioning plate 30 at a specified position.

[0070] Specifically, the auxiliary hole 32 can be used to place a light-transmitting or semi-light-transmitting film. The light source 20 projects a preset image in the direction of the positioning plate 30. The preset image contains a specific positioning point. By moving the positioning plate 30 to make the auxiliary hole 32 coincide with the positioning point, the locking mechanism 40 is locked to fix the position of the positioning plate 30.

[0071] It should be noted that in other embodiments, the positioning hole 31 and the auxiliary hole 32 can be elliptical, rectangular or other shapes. The film can be other light-transmitting or semi-light-transmitting materials. The number of auxiliary holes 32 can be N, N≥2. When N=2, the center line of the two auxiliary holes 32 passes through the positioning hole 31. The probe of the optical power meter can be placed in the positioning hole 31 before the positioning plate 30 is fixed or after the positioning plate 30 is fixed.

[0072] In one embodiment, as shown in Figure 3 The positioning hole 31 has a plurality of concentric circular steps with different diameters.

[0073] Specifically, the positioning hole 31 is circular and is provided with at least two concentric circular positioning steps with different diameters along the axial direction. As shown in Figure 2 The positioning hole 31 has two concentric circular positioning steps with different diameters, i.e., a first positioning step 311 and a second positioning step 312. By setting the concentric circular positioning steps, the probe of the optical power meter placed therein can fall into the positioning step matching the diameter of the probe itself.

[0074] In the above embodiment, by setting the concentric circular steps with different diameters in the positioning hole 31, the probe of the optical power meter placed in the positioning hole can be accurately positioned, so that different probes of the optical power meter can collect light spots of the same size at the same position, avoiding the light collection error caused by different diameters of the probes of the optical power meter, and further ensuring the correction accuracy.

[0075] According to a second aspect of the embodiments of the present disclosure, as shown in Figure 4As shown, a light power meter correction method is provided, applied to the above correction tool, and the method comprises the following steps:

[0076] In step S202, the probe of the standard light power meter is placed into the positioning hole 31.

[0077] Before placing the probe, the positioning hole 31 can be located on the path of the light projected by the light source 20 by moving the positioning plate 30 in advance, which can be used to determine a same light collecting position for the standard light power meter and the to-be-corrected light power meter which needs to be corrected subsequently.

[0078] In step S204, the light source 20 is driven according to the preset working current list, and the light projected by the light source 20 under different working current driving is sequentially measured by the standard light power meter to obtain corresponding standard light power values.

[0079] In the preset working current list, the number of working currents is N, N is a positive integer and not equal to 1.

[0080] Specifically, the preset working current list can be read by the upper computer, and first, one of the working currents is selected as the driving current to control the light source 20 to work. The light source 20 projects light under the action of the driving current, and the light falls on the probe of the standard light power meter in the positioning hole 31 to form a light spot. After the light spot no longer changes and the light power of the light source 20 stabilizes, the measurement value of the standard light power meter is recorded as the standard light power value under the working current. After the recording is completed, other working currents in the working current list that have not been used are selected as driving currents to drive the light source 20 to work, and the corresponding standard light power value recording is completed, and the process is repeated until all working currents in the working current list have been selected. The upper computer can be a computer, a microprocessor, a single-chip microcomputer or other processing devices with processing functions.

[0081] In step S206, after the corresponding standard light power values are obtained, the probe of the standard light power meter is removed, and the probe of the to-be-corrected light power meter is placed into the positioning hole 31.

[0082] The to-be-corrected light power meter is an uncorrected light power meter.

[0083] In step S208, the light source 20 is driven according to the working current list, and the light projected by the light source 20 under different working current driving is sequentially measured by the to-be-corrected light power meter to obtain corresponding measurement light power values.

[0084] Specifically, the host computer can select the current in the working current list as the driving current one by one, control the light source 20 to project light on the to-be-corrected optical power meter probe in the positioning hole 31, and record the measurement value of the to-be-corrected optical power meter as the measured optical power value under the working current after the light output power of the light source 20 is stable. The process is repeated until all working currents in the working current list are selected.

[0085] In step S210, a fitting operation is performed on the standard optical power value and the measured optical power value to obtain a fitting coefficient.

[0086] In the working current list, each working current is recorded with a corresponding standard optical power value and a measured optical power value.

[0087] Specifically, the standard optical power value and the measured optical power value can be curve-fitted based on the least square method, and the fitting coefficient can be calculated. In some other embodiments, a plurality of different curves can be used for fitting, and the curve with the smallest error is selected to calculate the fitting coefficient.

[0088] In step S212, the fitting coefficient is recorded into the to-be-corrected optical power meter, and the fitting coefficient is used to correct the measurement value according to the fitting coefficient after each measurement of the to-be-corrected optical power meter.

[0089] Specifically, the fitting coefficient obtained according to the fitting curve is written into the to-be-corrected optical power meter, and the to-be-corrected optical power meter corrects the measurement value according to the fitting coefficient and outputs the corrected power value after each light output power measurement. In some embodiments, a correction system can be added to the to-be-corrected optical power meter for correcting the measurement value according to the fitting coefficient. For example, a correction board card can be connected to the to-be-corrected optical power meter, and the correction board card includes a processor and a memory. The memory is used to store a preset curve and receive the fitting coefficient sent by the host computer. The processor is used to correct the measurement value of the to-be-corrected optical power meter according to the fitting coefficient and the preset curve and output the corrected power value.

[0090] It should be noted that the process of measuring the light output power by the standard optical power meter in steps S202-S206 can be performed periodically, and the corresponding standard optical power value is recorded, for example, once a day. Those skilled in the art can understand that the standard value measured by the standard optical power meter is not required at each correction.

[0091] In the technical scheme provided by the embodiments of the present disclosure, the same light collecting position of the standard optical power meter and the optical power meter to be calibrated is ensured by the calibration tool, the light source 20 is driven to emit light by using different working currents, the standard optical power meter and the optical power meter to be calibrated measure the light emitted by the light source 20 under each working current, so that the light output power of the light source 20 is the same when the standard optical power meter and the optical power meter to be calibrated measure, the output power values corresponding to the standard optical power meter and the optical power meter to be calibrated are recorded respectively, the fitting coefficient is calculated, and the optical power meter to be calibrated corrects the measurement value when measuring the light output power according to the fitting coefficient. In this way, by controlling the light collecting position and the light output power of the light source, the working environment of the standard optical power meter and the optical power meter to be calibrated is the same, the interference of external factors is reduced, and the accuracy of calibration is ensured.

[0092] Figure 5 FIG. 1 is a schematic diagram of a process for calibrating the position of the positioning hole in an embodiment, as shown in FIG. 1, before the standard optical power meter is placed in the positioning hole, the process further includes: Figure 5

[0093] Step S302, placing a semi-transparent sheet in the positioning hole 31.

[0094] The semi-transparent sheet can be a material that allows light to pass through, used to determine the path of the light projected by the light source 20. When the light passes through the semi-transparent sheet, a projection point or a light spot will be left on the sheet. The shape of the semi-transparent sheet can be selected according to the shape of the positioning hole 31. For example, when the positioning hole 31 is circular and has concentric circular positioning steps with different diameters, the semi-transparent sheet can be a circular semi-transparent sheet with the same diameter as one of the positioning steps of the positioning hole 31.

[0095] Step S304, starting the light source 20 to project light to the semi-transparent sheet, forming a light spot on the semi-transparent sheet.

[0096] Step S306, moving the positioning plate 30 until the light spot is located at the specified position of the positioning hole 31, and locking the locking mechanism 40.

[0097] The specified position can be any position that is convenient for the optical power meter probe to measure the light output power. For example, when the positioning hole 31 is circular, the specified position is the center of the circle.

[0098] Specifically, the locking mechanism 40 is in a loosened state, the positioning plate 30 is moved, and the position of the light spot on the semi-transparent sheet is observed. When the light spot is at the specified position in the positioning hole 31, the movement of the positioning plate 30 is stopped, and the locking mechanism 40 is locked.

[0099] Step S308, removing the semi-transparent sheet.

[0100] ​After the position of the positioning hole 31 is determined, the semi-transparent sheet is removed from the positioning hole 31 to be placed in the light power meter for light output power measurement.

[0101] In the above embodiment, by placing the semi-transparent sheet in the positioning hole 31, the positioning plate 30 is moved according to the landing point of the light on the semi-transparent sheet, and the position of the positioning hole 31 is determined, at which the standard light power meter and the to-be-corrected light power meter can collect the same light spot meeting the conditions, thereby improving the processing efficiency of the correction process.

[0102] Figure 6 FIG. 4 is a flowchart of a process for verifying the corrected light power meter in an embodiment, as shown in FIG. 4, after the fitting coefficients are recorded in the to-be-corrected light power meter, the process further includes: Figure 6

[0103] Step S402, the light source 20 is driven according to the working current list again, and the power measurement is performed by the to-be-corrected light power meter to obtain the corrected light power value of the to-be-corrected light power meter after the measurement value is corrected according to the fitting coefficients.

[0104] Specifically, the process of driving the light source 20 according to different currents in the working current list and performing power measurement by the to-be-corrected light power meter is repeated again in the manner in step S208, and the to-be-corrected light power meter outputs the corrected light power value after the measurement value is corrected according to the fitting coefficients, and the corrected light power values output by the to-be-corrected light power meter under different working currents are recorded.

[0105] Step S404, the error between the corrected light power value and the standard light power value is calculated.

[0106] Specifically, the error between the corrected light power value output by the to-be-corrected light power meter and the standard light power value obtained in step S204 is calculated.

[0107] Step S406, the error is compared with the preset standard to determine whether the to-be-corrected light power meter is qualified.

[0108] The preset standard can be the error allowed range preset in this correction process.

[0109] ​For example, when the error is within the preset standard, it can be determined that the correction of the optical power meter to be corrected is successful, and at this time it can be determined that the optical power meter to be corrected is qualified. When the error exceeds the preset standard, the correction process can be investigated. There are two possible reasons for the error exceeding the standard: the first is that there is an operation error or other environmental condition change in the correction process, causing a certain deviation in the correction result; the second is that the quality of the optical power meter to be corrected is a problem, causing a large measurement error even after correction. Therefore, if it is found through investigation that there is an operation error or other problem in the correction process, the problem can be excluded and the correction can be performed again. If it is confirmed through investigation that there is no problem in the correction process, it can be determined that the optical power meter to be corrected is unqualified.

[0110] In the above embodiment, by performing error checking on the corrected optical power meter, it is determined whether the correction process is successful, the optical power meter with a large error after correction is determined to be unqualified, and the qualified optical power meter with an error within the allowable range is retained, thereby realizing reasonable use of the optical power meter.

[0111] In an embodiment, the fitting operation can be one of a polynomial fitting, a Bezier fitting, or the like.

[0112] The polynomial fitting is to use a polynomial expansion to fit all observation points in a small analysis region containing a plurality of analysis points, to obtain an objective analysis field of the observation data, and the expansion coefficients are determined by least square fitting. The Bezier fitting is a fitting method based on a Bezier curve, which is a mathematical curve applied to a two-dimensional graphics application program.

[0113] According to a third aspect of the embodiments of the present disclosure, as Figure 7 shown in the figure, an optical power meter correction device is also provided, comprising:

[0114] The first probe alignment module 502 is configured to place the probe of the standard optical power meter into the positioning hole.

[0115] The current acquisition module 504 is configured to acquire a preset working current list.

[0116] The first power acquisition module 506 is configured to drive the light source according to different working currents in the working current list, and acquire the standard optical power value measured by the standard optical power meter.

[0117] The second probe alignment module 508 is configured to remove the probe of the standard optical power meter, and place the probe of the optical power meter to be corrected into the positioning hole.

[0118] The second power acquisition module 510 is configured to drive the light source according to different working currents in the working current list, and acquire the measured optical power value measured by the optical power meter to be corrected.

[0119] fitting module 512, configured to perform a fitting operation on the standard optical power value and the measured optical power value to obtain a fitting coefficient;

[0120] measurement correction module 514, configured to correct a measurement value of a to-be-corrected optical power meter according to the fitting coefficient.

[0121] Specific limitations of the optical power meter correction device can be referred to the limitations of the optical power meter correction method in the foregoing, which will not be described herein. Each module in the optical power meter correction device can be realized by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in hardware form, or can be stored in a memory in a computer device in software form, so as to be called and executed by a processor to perform operations corresponding to each module.

[0122] According to a fourth aspect of the embodiments of the present disclosure, a computer device is provided, which can be a server. An internal structure diagram of the computer device can be as shown in Figure 8 The computer device includes a processor, a memory, and a network interface connected through a system bus. The processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for running the operating system and the computer program in the non-volatile storage medium. The database of the computer device is configured to store a curve for fitting and a measured value of an output optical power. The network interface of the computer device is configured to communicate with an external terminal through a network connection. The computer program is executed by the processor to implement the correction method.

[0123] In one embodiment, a computer device is provided, which can be a terminal. An internal structure diagram of the computer device can be as shown in Figure 9As shown in the figure. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The communication interface of the computer device is used to communicate with external terminals in a wired or wireless manner. The wireless manner can be realized through WIFI, operator network, NFC (near field communication) or other technologies. The computer program is executed by the processor to realize the above-mentioned correction method. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer overlaid on the display screen, or a key, trackball or touchpad arranged on the shell of the computer device, or an external keyboard, touchpad or mouse, etc., used to input the measured value of optical power.

[0124] Those skilled in the art can understand that, Figure 8 Or Figure 9 The structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different component arrangement.

[0125] In one embodiment, a computer device is also provided, including a memory and a processor, the memory stores a computer program, and the processor executes the computer program to realize the steps in each method embodiment described above.

[0126] According to a fifth aspect of the embodiments of the present disclosure, a computer readable storage medium is provided, which stores a computer program. The computer program is executed by a processor to realize the steps in each method embodiment described above.

[0127] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above-mentioned embodiments of each method. Any reference to memory, storage, database or other medium used in each embodiment provided by the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in each embodiment provided by the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in each embodiment provided by the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0128] Any combination of the technical features of the above embodiments can be made. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present disclosure.

[0129] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be pointed out that, those skilled in the art will easily think of other implementation manners of the present disclosure after considering the specification and practicing the disclosed invention. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or conventional technical means in the technical field which are not disclosed by the present disclosure. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are indicated by the claims.

[0130] It should be understood that the present disclosure is not limited to the precise structures described and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof.

Claims

1. A calibration fixture for calibrating an optical power meter, characterized in that, include: A frame, wherein a locking mechanism is provided on the frame, the locking mechanism being used to control the movement of a positioning plate connected to the locking mechanism until the light projected by the light source falls into the positioning hole on the positioning plate; A light source, mounted on the frame, is used to project light under different operating currents; A positioning plate is mounted on the frame and connected to the locking mechanism. The positioning plate is located in the direction of the light projected by the light source. The positioning plate also has a positioning hole for placing the probe of the optical power meter. The positioning plate also has an auxiliary hole with multiple concentric circular steps of different diameters for placing a light-transmitting or semi-light-transmitting film. The light source projects a preset image in the direction of the positioning plate, and the preset image contains specific positioning points. By moving the positioning plate so that the auxiliary hole coincides with the positioning point, the locking mechanism is locked, fixing the position of the positioning plate.

2. A calibration method for calibrating an optical power meter, characterized in that, Applied to the calibration fixture as described in claim 1, the method includes the following steps: The probe of a standard optical power meter is placed into the positioning hole; the positioning plate is also provided with an auxiliary hole, which has multiple concentric circular steps of different diameters. The auxiliary hole is used to place a light-transmitting or semi-light-transmitting film, so that the light source projects a preset image in the direction of the positioning plate. The preset image contains a specific positioning point; by moving the positioning plate so that the auxiliary hole coincides with the positioning point, the locking mechanism is tightened to fix the position of the positioning plate. The light source is driven according to a preset list of operating currents. The light output power of the light projected by the light source under different operating currents is measured sequentially by the standard optical power meter to obtain the corresponding standard optical power value. After obtaining the corresponding standard optical power value, remove the probe of the standard optical power meter and place the probe of the optical power meter to be calibrated into the positioning hole; The light source is driven according to the operating current list, and the light output power of the light projected by the light source under different operating current driving conditions is measured sequentially by the optical power meter to be calibrated to obtain the corresponding measured optical power value. The standard optical power value and the measured optical power value are fitted together to obtain the fitting coefficient; The fitting coefficients are recorded in the optical power meter to be calibrated. The fitting coefficients are used to calibrate the measured values ​​after each measurement by the optical power meter to be calibrated.

3. The correction method according to claim 2, characterized in that, Before inserting the standard optical power meter into the positioning hole, the procedure also includes: A semi-transparent sheet is placed in the positioning hole; The light source is activated to project light onto the semi-transparent sheet, forming a light spot on the semi-transparent sheet; After moving the positioning plate until the light spot is located at the designated position of the positioning hole, lock the locking mechanism. Remove the semi-transparent sheet.

4. The correction method according to claim 2, characterized in that, After recording the fitting coefficients into the optical power meter to be calibrated, the process further includes: The light source is driven again according to the working current list, and the power is measured by the optical power meter to be calibrated to obtain the calibrated optical power value after the optical power meter to be calibrated corrects the measured value according to the fitting coefficient. Calculate the error between the corrected optical power value and the standard optical power value; The error is compared with a preset standard to determine whether the optical power meter to be calibrated is qualified.

5. The correction method according to claim 2, characterized in that, The fitting operation is one of polynomial fitting or Bezier fitting.

6. A calibration device for calibrating an optical power meter, using the calibration fixture described in claim 1, characterized in that, include: The first probe alignment module is used to place the probe of the standard optical power meter into the positioning hole; the positioning plate is also provided with an auxiliary hole, which has multiple concentric circular steps of different diameters. The auxiliary hole is used to place a light-transmitting or semi-light-transmitting film, so that the light source projects a preset image in the direction of the positioning plate. The preset image contains a specific positioning point; by moving the positioning plate so that the auxiliary hole coincides with the positioning point, the locking mechanism is tightened to fix the position of the positioning plate. The current acquisition module is used to acquire a preset list of operating currents; The first power acquisition module is used to drive the light source according to different operating currents in the operating current list and obtain the standard optical power value obtained by measuring the output optical power of the standard optical power meter. The second probe alignment module is used to remove the probe of the standard optical power meter and place the probe of the optical power meter to be calibrated into the positioning hole; The second power acquisition module is used to drive the light source according to different operating currents in the operating current list and obtain the measured optical power value obtained by the optical power meter to be calibrated through the output optical power measurement. The fitting module is used to perform fitting operations on the standard optical power value and the measured optical power value to obtain the fitting coefficient; The measurement correction module is used to correct the measured values ​​of the optical power meter to be corrected based on the fitting coefficients.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 2 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 2 to 5.

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