CN108844627B - Laser testing method for human eye safety and electronic equipment - Google Patents
Laser testing method for human eye safety and electronic equipment Download PDFInfo
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- CN108844627B CN108844627B CN201810618461.3A CN201810618461A CN108844627B CN 108844627 B CN108844627 B CN 108844627B CN 201810618461 A CN201810618461 A CN 201810618461A CN 108844627 B CN108844627 B CN 108844627B
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- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 claims description 11
- 238000010998 test method Methods 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 210000001747 pupil Anatomy 0.000 description 2
- 238000011076 safety test Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
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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
- G01J1/4257—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to monitoring the characteristics of a beam, e.g. laser beam, headlamp beam
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Abstract
The application provides a laser test method for human eye safety and electronic equipment, wherein the laser test method for the human eye safety comprises the following steps: projecting laser light to a laser receiving surface by a laser transmitter; acquiring a laser image formed by projecting laser onto a laser receiving surface through a camera, wherein the laser image is composed of a plurality of laser speckles with different brightness; and scanning the laser image by a preset unit size to determine an area with the maximum brightness value of the laser speckles in the laser image, wherein the size of the area with the maximum brightness value is the same as the preset unit size. The laser testing method and the electronic device for the human eye safety can quickly and accurately determine the area with the strongest laser energy, and provide an effective data basis for testing the safety of the laser.
Description
Technical Field
The present application relates to the field of mobile terminal technologies, and in particular, to a laser testing method and an electronic device for eye safety.
Background
With the continuous progress of science and technology, the application fields of laser technology are more and more extensive, such as laser printers, laser radars, laser scanning codes and the like. In daily life, the used laser is applied only through safety tests. Namely, whether the laser energy meets the specification of the international laser safety standard is tested. How to test laser rapidly and accurately becomes a problem to be solved urgently.
Content of application
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the application provides a laser testing method and electronic equipment for human eye safety, which can quickly and accurately determine the area with the strongest laser energy and provide an effective data basis for testing the safety of laser.
An embodiment of an aspect of the present application provides a laser testing method for human eye safety, including:
projecting laser light to a laser receiving surface by a laser transmitter;
acquiring a laser image formed by projecting the laser onto the laser receiving surface through a camera, wherein the laser image is composed of a plurality of laser speckles with different brightness;
scanning the laser image by a preset unit size to determine an area with the maximum brightness value of the laser speckles in the laser image, wherein the size of the area with the maximum brightness value is the same as the preset unit size.
Optionally, the distance between the laser receiving surface and the laser emitter is greater than or equal to 100 mm.
Optionally, the preset unit size is circular, and the diameter of the circle is 7 mm.
Optionally, scanning the laser image by a preset unit size to determine an area in the laser image where a brightness value of a laser speckle is maximum includes:
converting the laser image into a gray image;
scanning the gray scale image by the preset unit size to determine the gray scale value of each scanned area in the gray scale image;
and taking the area with the highest gray value as the area with the maximum brightness value.
Optionally, the method further comprises:
after determining the area with the maximum brightness value of the laser speckles in the laser image, comparing the brightness value of the area with the maximum brightness value with a preset safety value;
and when the brightness value of the area with the maximum brightness value is smaller than the preset safety value, determining the safety of the laser emitted by the laser emitter.
According to the laser testing method for the safety of the human eyes, the laser is projected to the laser receiving surface through the laser transmitter, the laser image formed on the laser receiving surface is obtained through the camera, the laser image is scanned according to the preset unit size, the area with the largest brightness value of laser speckles in the laser image is determined, the area with the strongest laser energy can be determined quickly and accurately, and an effective data basis is provided for testing the safety of the laser.
An embodiment of a second aspect of the present application provides an electronic device, including:
the laser transmitter is used for projecting laser to a laser receiving surface;
the camera is used for acquiring a laser image formed by the laser projected on the laser receiving surface, and the laser image consists of a plurality of laser speckles with different brightness;
the scanner is used for scanning the laser image according to a preset unit size and generating a scanning result;
the controller is respectively connected with the laser emitter, the camera and the scanner, and is used for controlling the laser emitter and the scanner, receiving the scanning result and determining an area with the largest brightness value of laser speckles in the laser image according to the scanning result, wherein the size of the area with the largest brightness value is the same as the preset unit size.
Optionally, the distance between the laser receiving surface and the laser emitter is greater than or equal to 100 mm.
Optionally, the preset unit size is circular, and the diameter of the circle is 7 mm.
Optionally, the controller is specifically configured to:
converting the laser image into a gray image;
scanning the gray scale image by the preset unit size to determine the gray scale value of each scanned area in the gray scale image;
and taking the area with the highest gray value as the area with the maximum brightness value.
Optionally, the controller is further configured to:
after determining the area with the maximum brightness value of the laser speckles in the laser image, comparing the brightness value of the area with the maximum brightness value with a preset safety value;
and when the brightness value of the area with the maximum brightness value is smaller than the preset safety value, determining the safety of the laser emitted by the laser emitter.
The electronic equipment of this application embodiment projects laser to the laser receiving face through laser emitter to acquire through the camera laser is projected laser image that forms on the laser receiving face, then with predetermineeing unit size to laser image scans, in order to confirm in the laser image, the biggest region of the luminance value of laser speckle can be fast, accurately determined the strongest region of laser energy, provides effective data basis for the security of test laser.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a laser testing method for human eye safety provided in an embodiment of the present application;
FIG. 2 is a schematic top view of a laser projection provided in an embodiment of the present application;
fig. 3 is a schematic diagram illustrating an effect of a laser image provided in an embodiment of the present application;
FIG. 4 is a flow chart of another laser testing method for human eye safety provided by an embodiment of the present application;
fig. 5 is a block diagram of an electronic device according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The laser test method for human eye safety and the electronic device according to the embodiments of the present application are described below with reference to the accompanying drawings.
Fig. 1 is a flowchart of a laser testing method for human eye safety according to an embodiment of the present disclosure.
As shown in fig. 1, the laser test method for human eye safety includes the steps of:
and S101, projecting laser to a laser receiving surface through a laser transmitter.
In daily life, the used laser is applied only through safety tests. Therefore, the laser testing method for the safety of the human eyes is provided, the area with the strongest laser energy can be determined quickly and accurately, and an effective data basis is provided for testing the safety of the laser.
In one embodiment of the invention, laser light may be projected to a laser receiving surface by a laser transmitter.
Wherein, the distance between the laser receiving surface and the laser emitter is more than or equal to 100 mm.
And S102, acquiring a laser image formed by the laser projected on a laser receiving surface through a camera.
Wherein the laser image is composed of a plurality of laser speckles with different brightness.
In one embodiment of the invention, a camera is used for shooting and acquiring a laser image formed by the laser projected on a laser receiving surface.
And S103, scanning the laser image by a preset unit size to determine an area with the maximum brightness value of the laser speckles in the laser image.
Wherein, the size of the area with the maximum brightness value is the same as the preset unit size. The shape of the predetermined unit size is a circle, and the diameter of the circle is 7 mm. Because whether the laser energy is safe or not is tested, whether the laser energy entering human eyes is large enough to damage the human eyes or not is mainly detected, and therefore the shape and the size of the pupils of the human eyes are used as the preset unit size.
Specifically, the laser image may be converted into a gray scale image, the gray scale image is scanned in a preset unit size, so as to determine a gray scale value of each scanned area in the gray scale image, and finally, the area with the highest gray scale value is used as the area with the largest brightness value. The highest gray value means higher brightness, i.e. the strongest laser energy.
The following is a description of a specific example:
as shown in fig. 2, the laser and camera are arranged in parallel. The laser projects laser light to a laser receiving face. The camera takes a picture of the laser image projected on the laser receiving surface. Since the laser light source is composed of a plurality of point light sources, the laser image projected on the laser receiving surface is laser speckles with uneven distribution and different brightness, as shown in fig. 3. Then, the laser speckle is scanned line by line in a scanning frame with the same size as the pupil of the human eye. And converting the laser image into a gray scale image, and scanning the gray scale image to obtain a read gray scale value so as to select a position with the strongest laser energy, namely a brightest area (the gray scale value is the largest to indicate the brightest brightness).
According to the laser testing method for the safety of the human eyes, the laser is projected to the laser receiving surface through the laser transmitter, the laser image formed by the laser projected on the laser receiving surface is obtained through the camera, then the laser image is scanned in the preset unit size, the area with the largest laser speckle brightness value in the laser image is determined, the area with the strongest laser energy can be determined quickly and accurately, and an effective data basis is provided for testing the safety of the laser.
In another embodiment of the present application, as shown in fig. 4, the laser testing method for human eye safety further includes:
and S104, after the area with the maximum brightness value of the laser speckles in the laser image is determined, comparing the brightness value of the area with the maximum brightness value with a preset safety value.
And S105, when the brightness value of the area with the maximum brightness value is smaller than a preset safety value, determining the safety of the laser emitted by the laser emitter.
After the area with the maximum brightness value of the laser speckles is determined, the brightness value of the area with the maximum brightness value can be compared with a preset safety value. The preset safety value is international safety standard, such as IEC 60825. If the brightness value of the area with the maximum brightness value in the laser image is lower than the international safety standard, the laser is in accordance with the safety standard, and the safety of a user is further ensured.
In order to implement the above embodiments, the present application further provides an electronic device.
As shown in fig. 5, the electronic device includes a laser transmitter 510, a camera 520, a scanner 530, and a controller 540.
Wherein, the laser transmitter 510 is used for projecting laser to the laser receiving surface.
And the camera 520 is used for acquiring a laser image formed by the laser projected on the laser receiving surface, and the laser image is composed of a plurality of laser speckles with different brightness.
And a scanner 530 for scanning the laser image at a preset unit size and generating a scanning result.
And the controller 540 is connected with the laser emitter 510, the camera 520 and the scanner 530 respectively, and the controller 540 is configured to control the laser emitter and the scanner, receive the scanning result, and determine, according to the scanning result, an area with the largest brightness value of the laser speckles in the laser image, where the size of the area with the largest brightness value is the same as the preset unit size.
It should be noted that the foregoing explanation of the laser testing method for human eye safety is also applicable to the electronic device in the embodiment of the present application, and details not disclosed in the embodiment of the present application are not repeated herein.
The electronic equipment of the embodiment of the application projects laser to a laser receiving surface through the laser transmitter, acquires laser images formed by projecting the laser onto the laser receiving surface through the camera, scans the laser images by a preset unit size, determines the area with the maximum brightness value of laser speckles in the laser images, can quickly and accurately determine the area with the strongest laser energy, and provides an effective data base for testing the safety of the laser.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (8)
1. A laser testing method for eye safety, comprising:
projecting laser light to a laser receiving surface by a laser transmitter;
acquiring a laser image formed by projecting the laser onto the laser receiving surface through a camera, wherein the laser image is composed of a plurality of laser speckles with different brightness;
scanning the laser image according to a preset unit size to determine an area with the maximum brightness value of laser speckles in the laser image, wherein the size of the area with the maximum brightness value is the same as the preset unit size;
scanning the laser image by a preset unit size to determine an area in the laser image where a brightness value of a laser speckle is maximum, including:
converting the laser image into a gray image;
scanning the gray scale image by the preset unit size to determine the gray scale value of each scanned area in the gray scale image;
and taking the area with the highest gray value as the area with the maximum brightness value.
2. The method of claim 1, wherein the laser receiving face is at a distance of 100 mm or greater from the laser transmitter.
3. The method of claim 1, wherein the predetermined unit size is circular in shape and the diameter of the circle is 7 mm.
4. The method of claim 1, further comprising:
after determining the area with the maximum brightness value of the laser speckles in the laser image, comparing the brightness value of the area with the maximum brightness value with a preset safety value;
and when the brightness value of the area with the maximum brightness value is smaller than the preset safety value, determining the safety of the laser emitted by the laser emitter.
5. An electronic device for performing laser testing of human eye safety, comprising:
the laser transmitter is used for projecting laser to a laser receiving surface;
the camera is used for acquiring a laser image formed by the laser projected on the laser receiving surface, and the laser image consists of a plurality of laser speckles with different brightness;
the scanner is used for scanning the laser image according to a preset unit size and generating a scanning result;
the controller is respectively connected with the laser emitter, the camera and the scanner, and is used for controlling the laser emitter and the scanner, receiving the scanning result and determining an area with the maximum brightness value of laser speckles in the laser image according to the scanning result, wherein the size of the area with the maximum brightness value is the same as the preset unit size;
the controller is specifically configured to:
converting the laser image into a gray image;
scanning the gray scale image by the preset unit size to determine the gray scale value of each scanned area in the gray scale image;
and taking the area with the highest gray value as the area with the maximum brightness value.
6. The electronic device of claim 5, wherein the laser receiving face is at a distance of 100 millimeters or more from the laser emitter.
7. The electronic device of claim 5, wherein the predetermined unit size is circular in shape and the diameter of the circle is 7 millimeters.
8. The electronic device of claim 5, wherein the controller is further to:
after determining the area with the maximum brightness value of the laser speckles in the laser image, comparing the brightness value of the area with the maximum brightness value with a preset safety value;
and when the brightness value of the area with the maximum brightness value is smaller than the preset safety value, determining the safety of the laser emitted by the laser emitter.
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| CN201810618461.3A CN108844627B (en) | 2018-06-15 | 2018-06-15 | Laser testing method for human eye safety and electronic equipment |
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| CN201810618461.3A CN108844627B (en) | 2018-06-15 | 2018-06-15 | Laser testing method for human eye safety and electronic equipment |
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| CN108844627B true CN108844627B (en) | 2020-04-10 |
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| WO2020114001A1 (en) * | 2018-12-07 | 2020-06-11 | 南昌欧菲生物识别技术有限公司 | Detection system and detection method for detecting light power of light emitting module |
| CN113268137A (en) * | 2021-02-03 | 2021-08-17 | 深圳赋能软件有限公司 | Human eye protection device and method, identity recognition device and electronic equipment |
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