Automatic testing device for light spot brightness of projection light machine

Abstract

The utility model discloses an automatic testing device for light spot brightness of a projection light machine, and the device is characterized in that the device comprises the projection light machine, a light machine module installation stud, an elbow clamp, a sliding rail, a first motor, a second motor, a first photoelectric detector, a second photoelectric detector, and a third photoelectric detector; the projection light machine is mounted on the light machine module mounting stud, and the projection light machine is fixed by using a screw; fixing the upper surface of the projection ray machine by using the toggle clamp; a driving shaft of the first motor is connected with the sliding rail moving in the first direction, and the first photoelectric detector is installed on the sliding rail moving in the first direction; a driving shaft of the second motor is connected with a sliding rail moving in the second direction, and the second photoelectric detector and the third photoelectric detector are installed on the sliding rail moving in the second direction. Based on the device, automation of light machine projection light machine light spot brightness testing can be achieved, and the projection light machine light spot brightness is efficiently evaluated.

Description

Technical Field

[0001] The present application relates to the technical field of optical equipment, and in particular to an automatic testing device for the brightness of a projection optical machine spot. Background Art

[0002] In projection head-up display (HUD) technology, the projection optical engine plays a core role. It is a key component to achieve clear and bright display. Inside the optical engine, the three primary colors of red, green and blue (RGB) are precisely controlled to form a colorful display screen. In order to ensure that the light emitted by the light source can be evenly distributed and reach the required brightness, the optical engine needs to undergo a series of complex optical processing processes: the light spot emitted by the light source is first optically shaped to eliminate irregular shapes and ensure that the light spot is uniform. After shaping, the originally divergent light source beam is converted into a parallel beam through a collimating lens, which is the basis for achieving long-distance clear projection. Then use a reflector to accurately combine light spots of different colors on the same path to ensure accurate color superposition. Finally, the light spot shape is further optimized through the light spot shaping lens, and the complete picture is accurately projected to the predetermined position through the lens.

[0003] Given the strict requirements of projection optical machines for light source brightness and spot coaxiality, especially in HUD systems, the brightness and consistency of the spot directly affect the driver's safety and experience. Therefore, it is crucial to provide a dedicated test device. This test device should be able to accurately evaluate the brightness performance of the optical machine to ensure that it meets the design standards. At the same time, it is also convenient for manufacturers to conduct quality control during the production process and improve product consistency and reliability.

[0004] The content of this background technology description is only for facilitating understanding of the relevant technology in this field and is not regarded as an admission of the prior art. Summary of the invention

[0005] In the field of projection technology, the projection optical machine can be fixed on a specially designed tooling platform to ensure the absolute alignment of the optical path, thereby achieving accurate projection of the light spot on a preset test screen. Then, the photodetector is started, which can capture light energy and convert it into a current signal form that is easy to analyze. In order to deeply analyze the brightness distribution characteristics of the light spot, the method adopted by the relevant technology relies on manually fine-tuning the position of the detector, gradually accumulating data throughout the various areas of the light spot, and using this progressive strategy to achieve high-precision mapping of the brightness characteristics of the light spot.

[0006] Although the above method guarantees the accuracy of the test to a certain extent, its inherent manual operation characteristics significantly limit the test efficiency and automation level, especially in the face of large-scale production and high-precision requirements. This manual operation mode is difficult to meet the industry's urgent needs for fast, non-biased spot size and brightness automatic detection technology. Therefore, providing a new generation of tooling solutions that can overcome the limitations of existing technologies and realize automated and efficient evaluation of optical and mechanical projection testing has become the key to promoting progress in the field of projection technology.

[0007] In view of this, the embodiment of the present application intends to provide an automated test device for the brightness of a projection optical machine spot. First, the projection optical machine is accurately fixed on a specially designed optical machine installation tooling through a positioning device. Subsequently, the optical machine is turned on so that it accurately projects a light beam onto a pre-set test screen to form a light spot area to be measured. Next, the photodetector in the measuring device is started. The core component of the detector is a high-sensitivity sensor based on a PIN photodiode, which can quickly convert the received optical power into a measurable current signal. In order to obtain comprehensive data on the brightness of the light spot, the photodetector is placed near the center of the light spot, and driven by a precision servo motor, the detector is moved along a preset trajectory to cover the entire light spot area. In this process, the detector continuously monitors and records the changes in light intensity at different positions, converts the light signal into a series of current values, and then reflects the brightness level of each point. Finally, the collected current signal is sent to a high-performance data processing unit, which is analyzed and converted in real time through a built-in algorithm, and finally generates an intuitive light spot brightness distribution diagram. These distribution charts not only show key parameters such as the average brightness and peak brightness of the light spot, but also provide detailed information on the change of brightness with spatial position, providing solid data support for subsequent optical machine performance evaluation and optimization.

[0008] The embodiment of the present application provides an automatic test device for the brightness of a light spot of a projection optical machine, characterized in that it comprises: a projection optical machine, an optical machine module mounting stud, a toggle clamp, a slide rail, a first motor, a second motor, a first photodetector, a second photodetector, and a third photodetector; the projection optical machine is mounted on the optical machine module mounting stud, and the projection optical machine is fixed by screws; the toggle clamp is used to fix the upper surface of the projection optical machine;

[0009] The driving shaft of the first motor is connected to a slide rail moving along a first direction, and the first photoelectric detector is mounted on the slide rail moving along the first direction;

[0010] The driving shaft of the second motor is connected to a slide rail moving along a second direction, and the second photodetector and the third photodetector are mounted on the slide rail moving along the second direction.

[0011] Optionally, the first direction is perpendicular to the second direction, and a line connecting the installation positions of the second photodetector and the third photodetector is perpendicular to the first direction;

[0012] The first photodetector is initially mounted at one end of the slide rail moving along the first direction;

[0013] The second photodetector and the third photodetector are respectively initially mounted on two end points of the slide rail moving along the second direction.

[0014] Optionally, the driving shaft of the first motor drives the slide rail moving along the first direction to rotate;

[0015] The driving shaft of the second motor drives the slide rail moving along the second direction to rotate.

[0016] Optionally, a lens of the optical projection machine is aligned with the center of the test base plate, and the lens projection light spot is positioned at the geometric center of the test base plate.

[0017] Optionally, the first motor, the second motor, the first photodetector, the second photodetector and the third photodetector are all mounted on a test base plate.

[0018] Optionally, the projection light machine spot brightness automatic testing device further includes a base and a power switch and a test button arranged on the base.

[0019] Optionally, the first motor drives the first photodetector installed on the slide rail moving along the first direction to move at a constant speed along a set path; the first photodetector monitors the brightness of the light spot in real time, and the first photodetector converts the received light signal into an electrical signal; the electrical signal is transmitted to a digital multimeter via a data cable for recording.

[0020] Optionally, the second motor drives the second photodetector and the third photodetector installed on the slide rail moving along the second direction to move toward each other; the second photodetector and the third photodetector monitor the brightness of the light spot in real time, and the second photodetector and the third photodetector convert the received light signal into an electrical signal; the electrical signal is transmitted to a digital multimeter via a data line for recording.

[0021] Optionally, the first photodetector, the second photodetector and the third photodetector are returned to their initial installation positions after testing is completed.

[0022] Optionally, the first photodetector, the second photodetector, and the third photodetector are all silicon PIN photodiodes, and a test wavelength range of the silicon PIN photodiodes is 400 nm to 1100 nm.

[0023] Other optional features and technical effects of the embodiments of the present application are partially described below, and partially can be understood by reading this document. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings. The elements shown are not limited by the proportions shown in the accompanying drawings. The same or similar reference numerals in the accompanying drawings represent the same or similar elements, wherein:

[0025] Figure 1 A schematic diagram of an automatic test device for the brightness of a projection light machine spot that can implement an embodiment of the present application is shown;

[0026] Figure 2A A rear view schematic diagram of a projection light machine spot brightness automatic testing device that can implement the embodiment of the present application is shown;

[0027] Figure 2B A schematic side view of a device for automatically testing the brightness of a projection light machine spot that can implement an embodiment of the present application is shown;

[0028] Figure 2C A schematic side view of another device for automatically testing the brightness of a projection light machine spot that can implement the embodiment of the present application is shown;

[0029] Figure 2D A schematic top view of a projection light machine spot brightness automatic testing device that can implement an embodiment of the present application is shown;

[0030] Figure 2E A side view schematic diagram of another projection light machine spot brightness automatic testing device that can implement the embodiment of the present application is shown.

[0031] The markings in the figure are as follows: 101-projection optical machine, 102-elbow clamp, 103-optical machine module mounting studs, 104-power switch, 105-test button, 106-first motor, 107-second motor, 108-first photodetector, 109-second photodetector, 110-third photodetector, 111-base, 112-test base plate, 113-slide rail. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with specific implementation methods and drawings. Here, the illustrative implementation methods and descriptions of the present application are used to explain the present application, but are not intended to limit the present application.

[0033] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0034] In an embodiment of the present application, a projection light machine spot brightness automatic testing device is provided, see Figure 1 . Figure 1 A schematic diagram of an automatic test device for the brightness of a projection light machine spot that can be used to implement the embodiment of the present application is shown. Figure 1 The automated testing device shown includes: a projection optical machine 101, an elbow clamp 102, an optical machine module mounting stud 103, a power switch 104, a test button 105, a first motor 106, a second motor 107, a first photodetector 108, a second photodetector 109, a third photodetector 110, a base 111, a test base plate 112 and a slide rail 113.

[0035] Among them, the projection optical machine 101 is installed in the optical machine module tooling according to the fixed hole position, the upper surface of the optical machine is fixed with the elbow clamp 102, the projection optical machine 101 is installed on the optical machine module mounting studs 103, and the projection optical machine 101 is accurately fixed with screws. The lens of the projection optical machine is aligned with the center position of the test base plate 112, and the lens projection spot is positioned at the geometric center position of the test base plate 112.

[0036] The driving shaft of the first motor 106 is connected to the slide rail moving along the first direction, and the first photodetector 108 is installed on the slide rail moving along the first direction; the driving shaft of the second motor 107 is connected to the slide rail moving along the second direction, and the second photodetector 109 and the third photodetector 110 are respectively installed on the slide rail moving along the second direction.

[0037] The first motor 106 and the second motor 107 respectively drive the connected slide rails to rotate.

[0038] Preferably, the first photodetector 108 is initially installed at one end of a slide rail moving along a first direction (for example, a horizontal plane direction), and the second photodetector 109 and the third photodetector 110 are initially installed at two end points of the slide rail moving along a second direction (for example, a direction perpendicular to the horizontal plane), respectively. The first direction is perpendicular to the second direction, and the line connecting the installation positions of the second photodetector 109 and the third photodetector is perpendicular to the first direction.

[0039] Preferably, the first photodetector 108 , the second photodetector 109 , and the third photodetector 110 may be silicon PIN photodiodes, and the test wavelength range of the silicon PIN photodiodes may be 400 nm to 1100 nm.

[0040] It should be noted that the projection optical machine installation module and the test base plate 112 are both arranged on the base 111; the first motor 106, the second motor 107, the first photodetector 108, the second photodetector 109 and the third photodetector 110 are all installed on the test base plate 112. Preferably, the base 111 is also provided with a power switch 104 and a test button 105.

[0041] The following pair Figure 1 The process of testing the brightness of a projection light machine light spot by the automatic testing device for the brightness of a projection light machine light spot in the illustrated embodiment is introduced.

[0042] First, the projector to be tested is precisely positioned and installed in a specially made optical machine module fixture, and fixed holes are used to ensure the stability and accurate positioning of the optical machine.

[0043] Furthermore, a customized fixed elbow clamp 102 is used to fasten the upper surface of the optical machine to prevent the optical machine from being displaced due to vibration or external force during subsequent testing, thereby affecting the test accuracy.

[0044] Then, connect the necessary test lines, including power lines and data lines, turn on the power switches of the optical machine and the test device, make the optical machine run normally, and project the light spot for testing.

[0045] Next, the test button is turned on to activate the first motor 106, driving the first photodetector 108 connected to the drive shaft of the first motor 106 to move at a constant speed along the set path (for example, from left to right). During this process, the first photodetector 108 monitors the brightness of the light spot in real time, converts the received light signal into an electrical signal, and transmits it to the digital multimeter through the data line for recording. After the test is completed, the first motor 106 is driven in the reverse direction (for example, from right to left), so that the first photodetector 108 returns to the starting position, ready for the next round of testing.

[0046] Next, the second motor 107 is started, and the second motor 107 drives the second photodetector 109 and the third photodetector 110 to move toward the center point from both sides at the same time (move toward each other) through the driving shaft. The second photodetector 109 and the third photodetector 110 monitor the brightness of the light spot in real time, convert the received light signal into an electrical signal, and transmit it to the digital multimeter through the data line for recording. This step is intended to comprehensively evaluate the brightness distribution of the light spot in the second direction. After the test is completed, the second photodetector 109 and the third photodetector 110 also return to the origin, completing a cycle of testing.

[0047] In summary, the projection optical machine brightness test device provided by the above embodiment can realize automated testing. The device adopts one-button start-up, which simplifies the cumbersome settings and adjustment steps in traditional manual testing, making the test operation more intuitive and convenient, and greatly reducing the technical threshold of operators. Automation has the ability to respond quickly and conduct continuous testing, and can complete the collection and analysis of a large amount of data in a short time. Compared with manual operation, its test speed and data processing capabilities have been significantly improved. Automated testing eliminates errors caused by human factors, such as subjective judgment and fatigue of operators, to ensure high consistency and accuracy of each test result. The automated testing device can not only collect data in real time, but also automatically perform data analysis and generate detailed test reports, including brightness distribution diagrams, average brightness values, maximum and minimum brightness comparisons and other key indicators, providing a scientific basis for product quality evaluation and optimization.

[0048] In order to further illustrate the projection light machine spot brightness automatic test device, the present application embodiment also provides different views of the automatic test device, see Figure 2A-2E . Figure 2A A rear view schematic diagram of a projection light machine spot brightness automatic testing device that can implement an embodiment of the present application is shown.

[0049] Figure 2B A side view schematic diagram of a projection light machine spot brightness automatic testing device that can implement an embodiment of the present application is shown. Figure 2C A side view schematic diagram of another device for automatically testing the brightness of a projection light machine spot that can implement an embodiment of the present application is shown. Figure 2D A schematic top view of a device for automatically testing the brightness of a projection light machine spot that can implement an embodiment of the present application is shown. Figure 2E A side view schematic diagram of another projection light machine spot brightness automatic testing device that can implement the embodiment of the present application is shown.

[0050] In this article, multiple embodiments of the present application are described, but for the sake of simplicity, the description of each embodiment is not exhaustive, and the same or similar features or parts between the various embodiments may be omitted. In this article, "one embodiment", "some embodiments", "example", "specific example", or "some examples" are intended to be applicable to at least one embodiment or example according to the present application, rather than all embodiments. The above terms do not necessarily mean to refer to the same embodiment or example. In the absence of mutual contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0051] The exemplary systems and methods of the present application have been specifically shown and described with reference to the above embodiments, which are merely examples of the best modes for implementing the present systems and methods. It will be appreciated by those skilled in the art that various changes may be made to the embodiments of the systems and methods described herein when implementing the present systems and / or methods without departing from the spirit and scope of the present application as defined in the appended claims.

Claims

1. An automatic test device for the brightness of a projection light spot, characterized in that: include: A projection optical machine, an optical machine module mounting stud, a toggle clamp, a slide rail, a first motor, a second motor, a first photodetector, a second photodetector, and a third photodetector; The projection optical machine is installed on the optical machine module mounting studs, and the projection optical machine is fixed with screws; Using the elbow clamp to fix the upper surface of the projection light machine; The driving shaft of the first motor is connected to a slide rail moving along a first direction, and the first photoelectric detector is mounted on the slide rail moving along the first direction; The driving shaft of the second motor is connected to a slide rail moving along a second direction, and the second photodetector and the third photodetector are mounted on the slide rail moving along the second direction.

2. The automatic test device for the brightness of a projection light spot according to claim 1, characterized in that: The first direction is perpendicular to the second direction, and a line connecting the installation positions of the second photodetector and the third photodetector is perpendicular to the first direction; The first photodetector is initially mounted at one end of the slide rail moving along the first direction; The second photodetector and the third photodetector are respectively initially mounted on two end points of the slide rail moving along the second direction.

3. The automatic test device for the brightness of a projection light spot according to claim 1, characterized in that: The driving shaft of the first motor drives the slide rail moving along the first direction to rotate; The driving shaft of the second motor drives the slide rail moving along the second direction to rotate.

4. The automatic test device for the brightness of a projection light machine spot according to claim 1, characterized in that: The lens of the optical projection machine is aligned with the center position of the test base plate, and the lens projection light spot is positioned at the geometric center position of the test base plate.

5. The automatic test device for the brightness of a projection light spot according to claim 1, characterized in that: The first motor, the second motor, the first photodetector, the second photodetector and the third photodetector are all mounted on a test substrate.

6. The automatic test device for projector light spot brightness according to claim 1, characterized in that: The projection light machine spot brightness automatic testing device also includes a base and a power switch and a test button arranged on the base.

7. The automatic test device for the brightness of a projector light spot according to claim 1, characterized in that: The first motor drives the first photoelectric detector installed on the slide rail moving along the first direction to move along a set path at a constant speed; The first photodetector monitors the brightness of the light spot in real time, and the first photodetector converts the received light signal into an electrical signal; The electrical signal is transmitted to a digital multimeter via a data line for recording.

8. The automatic test device for the brightness of a projector light spot according to claim 1, characterized in that: The second motor drives the second photodetector and the third photodetector installed on the slide rail moving along the second direction to move toward each other; The second photodetector and the third photodetector monitor the brightness of the light spot in real time. The second photodetector and the third photodetector convert the received light signal into an electrical signal; and transmit the electrical signal to a digital multimeter through a data line for recording.

9. The automatic test device for the brightness of a projector light spot according to claim 1, characterized in that: After the test is completed, the first photodetector, the second photodetector and the third photodetector all return to their initial installation positions.

10. The automatic test device for the brightness of a projector light spot according to claim 1, characterized in that: The first photodetector, the second photodetector, and the third photodetector are all silicon PIN photodiodes, and the test wavelength range of the silicon PIN photodiodes is 400 nm to 1100 nm.

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