CN113125006B - Light source module optical power measurement system, optical power measurement method and device - Google Patents
Light source module optical power measurement system, optical power measurement method and device Download PDFInfo
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- CN113125006B CN113125006B CN202110410405.2A CN202110410405A CN113125006B CN 113125006 B CN113125006 B CN 113125006B CN 202110410405 A CN202110410405 A CN 202110410405A CN 113125006 B CN113125006 B CN 113125006B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 114
- 238000005259 measurement Methods 0.000 title claims abstract description 44
- 238000000691 measurement method Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000013307 optical fiber Substances 0.000 claims description 59
- 230000008878 coupling Effects 0.000 claims description 20
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- 238000004590 computer program Methods 0.000 description 17
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- 238000005516 engineering process Methods 0.000 description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
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Abstract
The invention is suitable for the technical field of laser display, and provides a light source module optical power measurement system, a light power measurement method and a light power measurement device. In the working process of the light source module, the invention obtains the light power according to the light intensity of the laser of the light source module, thereby measuring the light power in real time in the whole life cycle of the operation of the laser display device.
Description
Technical Field
The invention belongs to the technical field of laser display, and particularly relates to a light source module optical power measurement system, an optical power measurement method and an optical power measurement device.
Background
Laser display is a new display technology, and the color gamut, contrast and brightness of the laser display technology are remarkably superior to those of the conventional display technology, so that the laser display technology is popular in the market. The laser display device generally adopts three primary colors of laser as a light source, and because of initial efficiency difference, working temperature difference and attenuation deceleration rate difference after long-time operation of each laser in laser display, the proportion of the three primary colors of laser drifts, and color cast of a picture is easy to occur.
Currently, aiming at the color accuracy problem of a laser display device, the prior art generally adopts a method of carrying out initial calibration on each light source module in a production stage and adjusting initial current to ensure the light power accuracy of three primary color lasers. However, the method cannot acquire the optical power of the light source module in the using process of the laser display device, so that the color drift cannot be calibrated, and the color accuracy of the laser display device cannot be ensured.
Disclosure of Invention
In view of the above, the embodiments of the present invention provide a light source module optical power measurement system, a light source module optical power measurement method and a light source module optical power measurement device, so as to solve the problem that the light source module optical power cannot be obtained in the use process of the laser display device in the prior art.
In a first aspect of an embodiment of the present invention, there is provided a light source module optical power measurement system, including:
the optical fiber cluster comprises a plurality of output optical fibers used for being connected with the light source module and feedback optical fibers used for obtaining reflected laser;
the laser output lens is connected with the bundling optical fiber and is used for coupling laser generated by the light source module to a laser display optical-mechanical system and reflecting part of the laser to the feedback optical fiber;
And the optical power measurement module is connected with the feedback optical fiber and is used for measuring the light intensity of the reflected laser so as to acquire the optical power of the light source module.
In one embodiment, the optical power measurement module includes an optical fiber coupling element and an optical sensor, where the optical fiber coupling element is connected with the feedback optical fiber, and is configured to expand and collimate the reflected laser in the feedback optical fiber and then output the collimated laser to the optical sensor.
In one embodiment, the light sensor is a monochrome sensor or a color sensor.
In one embodiment, when the light sensor is a monochromatic sensor, the monochromatic sensor is a photodiode or an avalanche diode;
when the light sensor is a color sensor, the color sensor is an RGB type color sensor or an XYZ type color sensor.
In one embodiment, the light source module comprises a laser light source and a coupling lens;
The laser light source comprises a monochromatic laser or a polychromatic laser;
The coupling lens is used for coupling laser generated by the laser light source to the bundling optical fiber.
In a second aspect of the embodiment of the present invention, an optical power measurement method based on the optical power measurement system of a light source module is provided, including:
Controlling the light source module to generate laser;
Controlling an optical power measuring module to acquire and measure the light intensity of the reflected laser;
and acquiring the optical power of the light source module according to the light intensity of the reflected laser.
In one embodiment, in the step of controlling the light source module to generate laser, the laser generated by the light source module is continuous laser;
the step of controlling the optical power measuring module to acquire and measure the light intensity of the reflected laser comprises the following steps: and controlling the optical power measurement module to acquire and measure the light intensity of the reflected laser according to the first preset frequency.
In one embodiment, in the step of controlling the light source module to generate laser, the laser generated by the light source module is modulated laser;
The step of controlling the optical power measuring module to acquire and measure the light intensity of the reflected laser comprises the following steps: and controlling the optical power measurement module to acquire and measure the light intensity of the reflected laser according to a second preset frequency, wherein the second preset frequency is consistent with the modulation frequency of the modulated laser.
In one embodiment, when the laser generated by the light source module is a monochromatic laser, the step of obtaining the optical power of the light source module according to the light intensity of the reflected laser includes: converting the light intensity of the obtained monochromatic laser into the light power of the light source module according to calibration;
When the laser generated by the light source module is multi-primary color laser, the step of obtaining the optical power of the light source module according to the light intensity of the reflected laser comprises the following steps: and converting the acquired light intensity of the multi-primary-color laser into the light power of each primary color in the light source module according to calibration.
A third aspect of an embodiment of the present invention provides an optical power measurement apparatus, including:
the light source module control module is used for controlling the light source module to generate laser;
The light intensity acquisition module is used for controlling the light power measurement module to acquire and measure the light intensity of the reflected laser;
And the optical power acquisition module is used for acquiring the optical power of the light source module according to the light intensity of the reflected laser.
In a fourth aspect of the embodiments of the present invention, there is provided a terminal device comprising a memory, a processor and a computer program stored in said memory and executable on said processor, said processor implementing the steps of the method as described above when said computer program is executed.
In a fifth aspect of the embodiments of the present invention, there is provided a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method as described above.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: according to the embodiment of the invention, the light source module optical power measuring system is arranged, and the laser power is obtained according to the laser light intensity of the light source module obtained in real time in the working process of the light source module, so that the laser power can be measured in real time in the whole life cycle of the operation of the laser display device, the control of the light source module according to the laser power measured in real time is facilitated, and the color accuracy of the laser display device is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a light source module optical power measurement system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a cross-sectional structure of a bundled optical fiber in a light source module optical power measurement system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an implementation flow of an optical power measurement method according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a timing sequence of emitting laser light from a light source module in an optical power measurement method according to an embodiment of the present invention;
FIG. 5 is a second timing diagram of the light source module emitting laser in the optical power measurement method according to the embodiment of the present invention;
fig. 6 is a flowchart of a first embodiment of an optical power measurement method according to an embodiment of the present invention;
fig. 7 is a schematic flow chart of a second embodiment of an optical power measurement method according to an embodiment of the present invention;
fig. 8 is a schematic flow chart of a third embodiment of an optical power measurement method according to the present invention;
fig. 9 is a flowchart of a fourth embodiment of an optical power measurement method according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of an optical power measurement device according to an embodiment of the present invention;
fig. 11 is a schematic diagram of a terminal device provided in an embodiment of the present invention.
Wherein, each reference sign in the figure:
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to illustrate the technical scheme of the invention, the following description is made by specific examples.
Fig. 1 is a schematic diagram of a light source module optical power measurement system 10 according to an embodiment of the invention. As shown in fig. 1, the light source module optical power measurement system 10 includes a bundling optical fiber 11, a laser output lens 12, and an optical power measurement module 13. The optical fiber bundle 11 includes a plurality of output fibers 111 for connecting with the light source module 20 and a feedback fiber 112 for obtaining reflected laser light. The laser output lens 12 is connected to the bundling optical fiber 11, and is used for coupling the laser generated by the light source module 20 to a laser display optical-mechanical system (not shown), and reflecting part of the laser to the feedback optical fiber 112. The optical power measurement module 13 is connected to the feedback optical fiber 112, and is used for measuring the light intensity of the reflected laser, so as to obtain the optical power of the light source module.
In this embodiment, the bundling optical fiber 11 is composed of a plurality of optical fibers, wherein one optical fiber is a feedback optical fiber for transmitting reflected laser, the feedback optical fiber and the optical fiber are output optical fibers for transmitting the laser generated by the light source module, the input end of the bundling optical fiber 11 is a plurality of optical fiber connectors, the output end of the bundling optical fiber 11 is a plurality of optical fibers which are arranged in a combined way, the arrangement cross-section shape of the bundling optical fiber is as shown in fig. 2, and the plurality of optical fibers are provided with structures such as jackets for protecting and bundling the optical fibers.
When the light source module 20 works, the generated laser is transmitted to the laser output lens 12 through the output optical fiber 111 in the bundling optical fiber 11, the laser output lens 12 comprises a series of lenses and scattering sheets, the laser generated by the light source module 20 is coupled to the laser display optical-mechanical system, and part of the laser is reflected back to the feedback optical fiber 112 of the bundling optical fiber 11. When the optical power measurement is performed, the feedback optical fiber 112 transmits the reflected laser to the optical power measurement module 13, and the optical power measurement module 13 obtains and measures the light intensity of the reflected laser and converts the light intensity into the optical power of the light source module 20 according to the calibration. It is understood that the calibration of the light intensity of the reflected laser light and the light power of the light source module 20 can be preset according to the ratio between the reflected laser light and the laser light emitted to the laser display optical system.
According to the embodiment of the invention, the light power is obtained according to the laser light intensity of the light source module 20 obtained in real time in the working process of the light source module 20 by arranging the light source module light power measuring system 10, so that the laser power can be measured in real time in the whole life cycle of the operation of the laser display device, the light source module 20 can be controlled according to the light power measured in real time, and the color accuracy of the laser display device is ensured. Of course, the optical power measured by the optical power measuring system 10 of the light source module can be used for other purposes, and is not limited to providing a basis for color accuracy adjustment.
Further, the light source module 20 includes a laser light source and a coupling lens. The laser light source includes a single-color laser or a multi-color laser (e.g., a tricolor laser), and may be configured as needed, and the coupling lens is used to couple the laser light generated by the laser light source to the bundling optical fiber 11.
Referring to fig. 2, in the present embodiment, the feedback optical fiber 112 is an optical fiber located in the middle of the cross section of the bundling optical fiber 11, so as to improve the accuracy of reflected laser sampling. Of course, in other embodiments, the feedback fiber 112 may be located at other positions in the bundled optical fiber 11, and is not limited to the above.
Further, the optical power measurement module 13 includes an optical fiber coupling element and an optical sensor, the optical fiber coupling element is connected with the feedback optical fiber 112, and is configured to expand and collimate the reflected laser in the feedback optical fiber 112 and emit the reflected laser to the optical sensor, and the optical sensor is configured to measure the light intensity of the reflected laser and convert the light intensity into the light intensity of the light source module 20 according to the calibration.
The specific type of light sensor may be set as desired. For example, the optical sensor may be a monochromatic sensor, and the monochromatic sensor may be a photodiode or an avalanche diode, and at this time, the laser generated by the corresponding light source module 20 is monochromatic laser, and the monochromatic sensor may obtain the light intensity of the monochromatic laser, so as to obtain the light power. For another example, the light sensor may be a color sensor, the color sensor may be an RGB type color sensor or an XYZ type color sensor, and at this time, the laser generated by the corresponding light source module 20 may be a single-color laser or a multi-color laser (for example, a three-primary-color laser), and the color sensor may accurately obtain the light intensity of each primary-color laser, thereby obtaining the light power of each primary color.
The embodiment of the invention also provides an optical power measuring method based on the optical power measuring system of the light source module. Fig. 3 is a flow chart of an optical power measurement method according to an embodiment of the present invention, where the method includes the following steps:
step S301: controlling the light source module to generate laser.
The laser light generated by the light source module 20 may be continuous laser light (as shown in fig. 4) or modulated laser light. The modulation system of the modulated laser light may be different depending on the light source. For example, when the laser light source in the light source module 20 is a monochromatic laser light source (red light source, green light source, or blue light source), the monochromatic laser light is modulated so that the laser light source of the light source module 20 generates monochromatic laser light according to the modulation frequency. For another example, when the laser light sources in the light source module 20 are three primary color laser light sources (red light source, green light source and blue light source), the three primary color laser light sources are modulated so that each primary color laser light source in the light source module 20 generates laser light according to the modulation frequency, and the time intervals of generating laser light by each primary color laser light source are not overlapped (as shown in fig. 5), and the time lengths of generating laser light by each primary color laser light source may be the same or different.
Step S302: and controlling the optical power measuring module to acquire and measure the light intensity of the reflected laser.
The situation where the optical power measuring module 13 acquires and measures reflected laser light may also be correspondingly different for different types of laser light (continuous laser light or modulated laser light).
For example, when the laser light generated by the light source module 20 is continuous laser light, the optical power measurement module 13 obtains and measures the light intensity of the reflected laser light according to a first preset frequency, which may be set as needed.
For another example, when the laser generated by the light source module 20 is modulated laser, the optical power measurement module 13 obtains and measures the light intensity of the reflected laser according to a second preset frequency, where the second preset frequency is consistent with the modulation frequency of the modulated laser, and at this time, the optical power measurement module may sequentially obtain the light intensities corresponding to the laser generated by the primary color laser sources.
Step S303: and acquiring the optical power of the light source module according to the light intensity of the reflected laser.
After the light intensity of the reflected laser light is obtained, the optical power measurement module 13 may convert the light intensity into the optical power of the light source module 20 according to the calibration. The manner in which the optical power measuring module 13 converts the light intensity into the optical power is different according to the type of the laser light source.
For example, when the laser light source of the light source module 20 is a monochromatic laser light source, the obtained light intensity is the light intensity of the monochromatic laser light, so that the obtained light intensity is converted into the corresponding light power according to calibration.
For another example, when the laser light source of the light source module 20 is a tricolor laser light source, the obtained light intensity is the light intensity of the tricolor laser, so that the obtained light intensity is only required to be respectively converted into the light powers corresponding to the tricolor laser according to calibration.
According to the optical power measuring method based on the optical power measuring system 10 of the light source module, the light source module is controlled to generate laser, the optical power measuring module is controlled to acquire and measure the light intensity of reflected laser, and the optical power of the light source module is acquired according to the light intensity, so that the laser power is acquired according to the laser light intensity of the light source module 20 acquired in real time, the laser power can be measured in real time within the whole life cycle of the operation of the laser display device, the control of the light source module 20 according to the real-time measured laser power is facilitated, and the color accuracy of the laser display device is ensured. Of course, the optical power measured by the optical power measuring method can be used for other purposes, and is not limited to providing a basis for color accuracy adjustment.
Several specific examples are given below. It should be understood that the following examples are only illustrative of the optical power measurement method and are not intended to limit the scope thereof.
Referring to fig. 6, in a first embodiment:
An optical power measurement method comprising:
Step S311: the laser source of the light source module is a monochromatic laser source, and the laser generated by the laser source is continuous laser.
Step S312: and controlling the optical power measurement module to acquire and measure the light intensity of the reflected laser according to the first preset frequency.
Step S313: and according to the light intensity of the reflected laser, converting the light intensity of the monochromatic laser into the light power of the light source module according to calibration.
Referring to fig. 7, in a second embodiment:
An optical power measurement method comprising:
Step S321: the laser source of the light source module is a monochromatic laser source, and the laser generated by the laser source is modulated laser.
Step S322: and controlling the optical power measurement module to acquire and measure the light intensity of the reflected laser according to a second preset frequency, wherein the second preset frequency is consistent with the modulation frequency of the modulated laser.
Step S323: and according to the light intensity of the reflected laser, converting the light intensity of the monochromatic laser into the light power of the light source module according to calibration.
Referring to fig. 4 and 8, embodiment three:
An optical power measurement method comprising:
step S331: the laser source of the light source module is a three-primary-color laser source, and the laser generated by the laser source is continuous laser.
Step S332: and controlling the optical power measurement module to acquire and measure the light intensity of the reflected laser according to the first preset frequency.
Step S333: and respectively converting the light intensities of the three primary color lasers into the light power of each primary color laser in the light source module according to the calibration.
Referring to fig. 5 and 9, embodiment four:
An optical power measurement method comprising:
step S341: the laser source of the light source module is a three-primary-color laser source, and the laser generated by the laser source is modulated laser.
Step S342: the control light power measuring module sequentially acquires and measures the light intensity corresponding to the reflected laser of each primary color laser source according to a second preset frequency, wherein the second preset frequency is consistent with the modulation frequency of the modulated laser.
Step S343: and respectively converting the light intensities of the three primary color lasers into the light power of each primary color laser in the light source module according to the calibration.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
Referring to fig. 10, based on the same inventive concept, an optical power measurement device is further provided according to an embodiment of the present invention, which includes a light source module control module 41, a light intensity obtaining module 42, and an optical power obtaining module 43. The light source module control module 41 is configured to control the light source module to generate laser, the light intensity obtaining module 42 is configured to control the light power measuring module to obtain and measure the light intensity of the reflected laser, and the light power obtaining module 43 is configured to obtain the light power of the light source module according to the light intensity of the reflected laser.
Fig. 11 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 11, the terminal device 5 of this embodiment includes: a processor 50, a memory 51 and a computer program 52, such as an optical power measurement program, stored in said memory 51 and executable on said processor 50. The processor 50, when executing the computer program 52, implements the steps of the various optical power measurement method embodiments described above, such as steps S301 to S303 shown in fig. 3. Or the processor 50, when executing the computer program 52, performs the functions of the modules/units of the apparatus embodiments described above, such as the functions of the modules 41 to 43 shown in fig. 10.
By way of example, the computer program 52 may be partitioned into one or more modules/units that are stored in the memory 51 and executed by the processor 50 to complete the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing the specified functions describing the execution of the computer program 52 in the terminal device 5.
The terminal device 5 may be a computing device such as a desktop computer, a notebook computer, a palm computer, a cloud server, etc. The terminal device 5 may include, but is not limited to, a processor 50, a memory 51. It will be appreciated by those skilled in the art that fig. 11 is merely an example of the terminal device 5 and does not constitute a limitation of the terminal device 5, and may include more or less components than illustrated, or may combine certain components, or different components, e.g., the terminal device 5 may further include an input-output device, a network access device, a bus, etc.
The Processor 50 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 51 may be an internal storage unit of the terminal device 5, such as a hard disk or a memory of the terminal device 5. The memory 51 may also be an external storage device of the terminal device 5, such as a plug-in hard disk, a smart memory card (SMART MEDIA CARD, SMC), a Secure Digital (SD) card, a flash memory card (FLASH CARD) or the like, which are provided on the terminal device 5. Further, the memory 51 may also include both an internal storage unit and an external storage device of the terminal device 5. The memory 51 is used for storing the computer program as well as other programs and data required by the terminal device 5. The memory 51 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other manners. For example, the apparatus/terminal device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (7)
1. The utility model provides a light source module optical power measurement system which characterized in that includes:
The optical fiber cluster comprises a plurality of output optical fibers connected with the light source module and feedback optical fibers used for obtaining reflected laser, and the feedback optical fibers are optical fibers positioned in the middle of the cross section of the optical fiber cluster;
the laser output lens is connected with the bundling optical fiber and is used for coupling laser generated by the light source module to a laser display optical-mechanical system and reflecting part of the laser to the feedback optical fiber;
The optical power measurement module is connected with the feedback optical fiber and is used for measuring the light intensity of the reflected laser so as to obtain the optical power of the light source module according to preset calibration;
The light source module comprises a laser light source and a coupling lens; the laser light source comprises a monochromatic laser or a polychromatic laser; the coupling lens is used for coupling laser generated by the laser light source to the bundling optical fiber;
the laser generated by the light source module is continuous laser or modulated laser;
When the laser generated by the light source module is continuous laser, the light power measuring module acquires and measures the light intensity of the reflected laser according to a first preset frequency;
When the laser generated by the light source module is modulated laser, the light power measurement module acquires and measures the light intensity of the reflected laser according to a second preset frequency, and the second preset frequency is consistent with the modulation frequency of the modulated laser;
the optical power measurement module comprises an optical fiber coupling element and an optical sensor, wherein the optical sensor is a monochromatic sensor or a color sensor; when the light sensor is a monochromatic sensor, the monochromatic sensor is a photodiode or an avalanche diode; when the light sensor is a color sensor, the color sensor is an RGB type color sensor or an XYZ type color sensor.
2. The light source module optical power measurement system of claim 1, wherein the optical fiber coupling element is connected to the feedback optical fiber, and is configured to expand and collimate the reflected laser light in the feedback optical fiber and output the collimated laser light to the optical sensor.
3. An optical power measurement method based on the optical power measurement system of the light source module set according to claim 1 or 2, comprising:
Controlling the light source module to generate laser;
Controlling an optical power measuring module to acquire and measure the light intensity of the reflected laser;
and acquiring the optical power of the light source module according to the light intensity of the reflected laser.
4. The method of claim 3, wherein in the step of controlling the light source module to generate laser light, the laser light generated by the light source module is continuous laser light;
the step of controlling the optical power measuring module to acquire and measure the light intensity of the reflected laser comprises the following steps: and controlling the optical power measurement module to acquire and measure the light intensity of the reflected laser according to the first preset frequency.
5. The method of claim 3, wherein in the step of controlling the light source module to generate laser light, the laser light generated by the light source module is modulated laser light;
The step of controlling the optical power measuring module to acquire and measure the light intensity of the reflected laser comprises the following steps: and controlling the optical power measurement module to acquire and measure the light intensity of the reflected laser according to a second preset frequency, wherein the second preset frequency is consistent with the modulation frequency of the modulated laser.
6. The method of claim 3, wherein when the laser generated by the light source module is a monochromatic laser, the step of obtaining the optical power of the light source module according to the light intensity of the reflected laser comprises: converting the light intensity of the obtained monochromatic laser into the light power of the light source module according to calibration;
When the laser generated by the light source module is multi-primary color laser, the step of obtaining the optical power of the light source module according to the light intensity of the reflected laser comprises the following steps: and converting the acquired light intensity of the multi-primary-color laser into the light power of each primary color in the light source module according to calibration.
7. An optical power measuring apparatus for realizing the optical power measuring method according to any one of claims 3 to 6, comprising:
the light source module control module is used for controlling the light source module to generate laser;
The light intensity acquisition module is used for controlling the light power measurement module to acquire and measure the light intensity of the reflected laser;
And the optical power acquisition module is used for acquiring the optical power of the light source module according to the light intensity of the reflected laser.
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