CN112067256A - Optical path detection device and detection method for light combining system of laser projector - Google Patents
Optical path detection device and detection method for light combining system of laser projectorDownload PDFInfo
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Abstract
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Description
Translated fromChinese技术领域technical field
本发明涉及激光投影领域，具体涉及一种激光投影机合光系统光路检测装置及其检测方法。The invention relates to the field of laser projection, in particular to an optical path detection device of a light combining system of a laser projector and a detection method thereof.
背景技术Background technique
激光投影机相对其他光源系统的投影机，具有长寿命，亮度高，色域广的优点。激光投影机通常包括激光合光系统和镜头成像系统。激光合光系统内有波长转换装置及预设光路，可以将单色蓝色激光转换为三色激光，经合光出光透镜汇聚并投射到成像系统中的光导管内。合光出光光斑的位置及大小，受合光系统零部件误差影响较大，合光出射光斑不能完全被光导管收纳，则投影机亮度及色温达不到预设值。Compared with projectors of other light source systems, laser projectors have the advantages of long life, high brightness and wide color gamut. Laser projectors usually include a laser light combining system and a lens imaging system. The laser light combining system has a wavelength conversion device and a preset optical path, which can convert a monochromatic blue laser into a three-color laser, which is condensed and projected into the light pipe in the imaging system through the light combining and exiting lens. The position and size of the combined light beam spot are greatly affected by the error of the components of the combined light system. If the combined light output beam cannot be completely accommodated by the light guide, the projector brightness and color temperature will not reach the preset values.
一般只有在整个光机完全组立之后，才会测试光学亮度、色温等数据，合光出光斑的位置及大小，受合光系统零部件误差影响较大，合光射出光斑不能完全被光导管收纳，则投影机亮度及色温达不到预设值；若光机系统亮度色温不合格，则需要拆机维修调试，这种方法耗时费力，效率很低，影响生产作业。缺乏一种直观检测手段，用于测试合光内部光路是否和预设光路一致，测试出光光斑和光导管的配合位置关系。Generally, the optical brightness, color temperature and other data will be tested only after the entire optical machine is completely assembled. The position and size of the combined light spot are greatly affected by the errors of the components of the combined light system, and the combined light output spot cannot be completely absorbed by the light guide If the brightness and color temperature of the light-mechanical system are unqualified, it needs to be disassembled for maintenance and debugging. This method is time-consuming and labor-intensive, and the efficiency is very low, which affects the production operation. There is a lack of an intuitive detection method to test whether the internal optical path of the combined light is consistent with the preset optical path, and to test the matching position relationship between the light spot and the light guide.
发明内容SUMMARY OF THE INVENTION
为了解决上述技术问题，本发明的目的是提供一种激光投影机合光系统光路检测装置，不仅能够有效检测出合光内部光路是否和预设光路一致，即合光光斑位置，和测试出光光斑和光导管的配合位置关系，而且避免拆机维修调试，保证生产作业的正常进行，提高生产效率。In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide an optical path detection device of a laser projector light combining system, which can not only effectively detect whether the internal optical path of the combined light is consistent with the preset optical path, that is, the position of the combined light spot, and test the light spot and light The matching position of the conduit, and avoid disassembly, maintenance and debugging, ensure the normal operation of production operations, and improve production efficiency.
本发明的另一目的是提供一种激光投影机合光系统光路检测方法。Another object of the present invention is to provide a method for detecting an optical path of a light combining system of a laser projector.
为达到上述目的，本发明采用的技术方案是：一种激光投影机合光系统光路检测装置，包括驱动电源、检测屏幕及待测激光投影机合光系统，其特征在于：In order to achieve the above object, the technical scheme adopted in the present invention is: a light path detection device of a laser projector light combining system, comprising a driving power supply, a detection screen and a laser projector light combining system to be tested, and is characterized in that:
所述待测激光投影机合光系统包括激光发生器、波长转换组件及预设光路，合光系统出射光斑处前设置合光出光透镜，通过合光出光透镜将出射光斑射入检测屏幕中；The light combining system of the laser projector to be tested includes a laser generator, a wavelength conversion component and a preset optical path, a light combining and light-emitting lens is arranged in front of the light-combining system's outgoing light spot, and the outgoing light spot is injected into the detection screen through the light-combining and light-exiting lens;
所述驱动电源用于为待测激光投影机合光系统设置不同电压和电流的直流稳压电源；针对不同类型的激光光源，设置使激光发光器稳定发光的匹配数据，使检测能够顺利进行，避免因光线太强而损坏激光投影机合光系统；The driving power supply is used to set DC stabilized power supplies of different voltages and currents for the light combining system of the laser projector to be tested; for different types of laser light sources, matching data to make the laser light emitters emit light stably is set, so that the detection can be carried out smoothly, Avoid damage to the laser projector light combining system due to too strong light;
所述检测屏幕代替原有设置在合光出光透镜前端的光导管，The detection screen replaces the original light pipe arranged at the front end of the light-combining and light-emitting lens,
检测屏幕上设置有检测框，检测框的大小和光导管内壁尺寸相同，设置位置与光导管相同；检测框中心设置一个检测圈，检测圈中标识预设光路光斑照射位置；A detection frame is set on the detection screen, the size of the detection frame is the same as that of the inner wall of the light pipe, and the setting position is the same as that of the light pipe; a detection circle is set in the center of the detection frame, and the detection circle marks the irradiation position of the preset light path;
检测装置启动时，通过实际光斑位置与检测框对比，如果光斑位置不超过检测框范围，表明与合光系统预设光路一致，判断被测试的合光系统为良品；通过实际光斑位置与屏幕上检测圈对比，判断被测合光系统光路偏移方位及程度，制定维修策略。When the detection device is started, the actual spot position is compared with the detection frame. If the spot position does not exceed the detection frame range, it indicates that it is consistent with the preset optical path of the light combining system, and the tested light combining system is judged to be a good product; Comparing the detection circles, judging the direction and degree of the optical path deviation of the measured light-combining system, and formulating maintenance strategies.
一种激光投影机合光系统光路检测方法，其特征在于包括如下步骤：A method for detecting an optical path of a light combining system of a laser projector, which is characterized by comprising the following steps:
在原光导管入光位置设置检测屏幕，合光系统出射光斑照射到检测屏幕上，具体是使用驱动电源点亮激光投影机光源，使光源发出的光经过合光系统转换波长，经由合光出光透镜，照射到检测屏幕上，并在检测屏幕上形成光斑图形；A detection screen is set at the light incident position of the original light pipe, and the light spot emitted by the light combining system is irradiated on the detection screen. Specifically, the light source of the laser projector is turned on by the driving power supply, so that the light emitted by the light source is converted into the wavelength by the light combining system, and then passes through the light combining lens. , irradiate on the detection screen, and form a spot pattern on the detection screen;
对比实际照射光斑边界是否超过检测屏幕上的检测框，光斑超出检测框的判定合光系统为不良品，反之，合光系统为良品；对比实际照射光斑和检测圈的位置差异和大小差异，判断出被测合光系统光路偏移方位及程度，制定维修策略。Compare whether the boundary of the actual illumination spot exceeds the detection frame on the detection screen. If the spot exceeds the detection frame, the light combining system is judged to be a defective product. On the contrary, the light combining system is a good product; Find out the azimuth and degree of the optical path deviation of the light-combining system under test, and formulate a maintenance strategy.
本发明提供的技术方案带来的有益效果是：在本发明中，检测屏幕空间位置和光机中光导管位置一致，检测屏幕上的检测框尺寸等于光导管内壁尺寸，通过对比屏幕上检测框和实际照射光斑边界的位置，反映出合光系统内部光路和预设光路是否一致，从而筛选出光路符合设计值的合光系统；通过比对实际照射光斑和屏幕上检测圈的大小，对比实际照射光斑和检测圈的位置关系，判定被测合光系统所采取的对应维修策略，提高了测试效率，能够有效避免不良品流出，测试方法简便直观，效率高；The beneficial effects brought by the technical solution provided by the present invention are: in the present invention, the spatial position of the detection screen is consistent with the position of the light pipe in the optical machine, the size of the detection frame on the detection screen is equal to the size of the inner wall of the light pipe, and by comparing the detection frame on the screen with the size of the inner wall of the light pipe The position of the actual irradiation spot boundary reflects whether the internal optical path of the light combining system is consistent with the preset optical path, so as to screen out the light combining system whose optical path meets the design value; by comparing the actual irradiation spot and the size of the detection circle on the screen, compare the actual irradiation spot The positional relationship with the detection circle determines the corresponding maintenance strategy adopted by the light-combining system under test, which improves the test efficiency and can effectively avoid the outflow of defective products. The test method is simple and intuitive, and has high efficiency;
通过此检测方法可以快速筛选出不合格的合光系统，而不必待整个光机组装好之后再检测，通过测试，能够为不良品维修提供指导，从而提高生产效率。This detection method can quickly screen out unqualified photosynthesis systems, without having to wait for the entire opto-mechanical assembly to be assembled before testing. Through testing, it can provide guidance for the maintenance of defective products, thereby improving production efficiency.
附图说明Description of drawings
下面结合附图及实施例，对本发明的结构和特征作进一步描述。The structure and features of the present invention will be further described below with reference to the accompanying drawings and embodiments.
图 1 为本发明的结构示意图。Figure 1 is a schematic structural diagram of the present invention.
图 2 为本发明的流程图。Figure 2 is a flow chart of the present invention.
图 3 本发明实施例中提供的一种检测屏幕的结构示意图。FIG. 3 is a schematic structural diagram of a detection screen provided in an embodiment of the present invention.
附图1和图3中，1.激光投影机合光系统，2.合光出光透镜，3.检测屏幕，4.驱动电源，5.激光发生器，6.检测框，7.检测圈。In Fig. 1 and Fig. 3, 1. laser projector light combining system, 2. light combining light lens, 3. detection screen, 4. driving power supply, 5. laser generator, 6. detection frame, 7. detection circle.
具体实施方式Detailed ways
为了使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明作进一步地详细描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
本发明实施例提供一种激光投影机合光系统光路检测装置，如图1所示，包括驱动电源4、检测屏幕3及待测激光投影机合光系统1，其特征在于：An embodiment of the present invention provides an optical path detection device for a laser projector light combining system, as shown in FIG. 1 , including a driving power supply 4, a detection screen 3 and a laser projector light combining system 1 to be tested, and is characterized in that:
所述待测激光投影机合光系统内部设有激光发生器5、波长转换组件及预设光路，合光系统出射光斑处前设置合光出光透镜2，通过合光出光透镜2将出射光斑射入检测屏幕3中；The light combining system of the laser projector to be tested is provided with a
所述驱动电源4用于为待测激光投影机合光系统1设置不同电压和电流的直流稳压电源；针对不同类型的激光光源，设置使激光发光器5稳定发光的匹配数据，使检测能够顺利进行，避免因光线太强而损坏激光投影机合光系统；The driving power supply 4 is used to set the DC voltage stabilized power supply of different voltages and currents for the light combining system 1 of the laser projector to be tested; for different types of laser light sources, set matching data to make the
所述检测屏幕3代替原有设置在合光出光透镜前端的光导管，且检测屏幕3上设置有检测框5，检测框的大小和光导管内壁尺寸相同，设置位置与光导管相同；检测框6中心设置一个检测圈7，检测圈7中标识预设光路光斑照射位置；The detection screen 3 replaces the original light pipe arranged at the front end of the light-combining and light-emitting lens, and the detection screen 3 is provided with a
检测装置启动时，通过实际光斑位置与检测框对比，如果光斑位置不超过检测框6范围，表明与合光系统预设光路一致，判断被测试的合光系统为良品；通过实际光斑位置与屏幕上检测圈7对比，判断被测合光系统光路偏移方位及程度，制定维修策略。When the detection device is started, the actual light spot position is compared with the detection frame. If the light spot position does not exceed the range of the
本发明实施例提供一种激光投影机合光系统光路检测方法，如图 2 所示，图 2是本发明实施例提供的一种激光投影机合光系统光路检测方法的流程图，该方法用于检测投影机合光系统光路的准直性，该方法包括以下几个步骤：An embodiment of the present invention provides a method for detecting an optical path of a light combining system of a laser projector. As shown in FIG. 2 , FIG. 2 is a flowchart of a method for detecting an optical path of a light combining system of a laser projector provided by an embodiment of the present invention. For detecting the collimation of the light path of the light combining system of the projector, the method includes the following steps:
步骤 201、通过检测装置将合光系统出射光斑照射到检测屏幕上，在接收屏幕上形成光斑。
步骤 202、对比光斑是否超过屏幕上的检测框边界，对比光斑和检测圈的位置是否有差异，大小是否有差异，该检测框代表光导管内壁边缘，光斑超出检测框，表示合光系统的出射光无法完全进入光导管，这样整个光机系统的参数会降低；通过对比光斑和检测圈的位置关系，可以判断光斑的偏移方向，从而制定合适的维修策略，避免通过反复试装调整的方法来维修；通过对比光斑和检测圈的大小，同样可以判断出合光部分的特定部件组装有偏差，从而为维修提供指导。
步骤 203、光斑超出检测边框的判定为不良品；光斑在检测边框内的判定为良品。依据上一步骤，可以快速检出不良品，并为维修提供指导。
通过此检测方法可以快速筛选出不合格的合光系统，而不必待整个光机组装好之后再检测。Through this detection method, the unqualified photosynthesis system can be quickly screened out, and it is not necessary to wait for the entire photomachine to be assembled before detection.
现有技术中，光机的光学参数，通过光导管只能在光机完全组装好之后，再去测试各项光学参数，发现光学参数不合格，再去返回维修；通常只能根据经验来判断不良原因，根据经验来维修不良品，检测效率低，需要反复重复维修、检测的过程，才能达到合格要求；维修效率低，需要积累大量经验才能提供维修策略。In the prior art, the optical parameters of the opto-mechanical can only be tested by the light guide after the opto-mechanical is fully assembled. If the optical parameters are found to be unqualified, the optical parameters will be returned for maintenance; usually, it can only be judged based on experience. Defective reasons, repairing defective products based on experience, the detection efficiency is low, and the process of maintenance and inspection needs to be repeated to meet the qualified requirements; maintenance efficiency is low, and a lot of experience is required to provide maintenance strategies.
综上所述，本发明实施例提供的一种激光投影机合光系统光路检测方法，检测屏幕的位置设置在光导管收光位置，屏幕上设置有检测框，检测框的大小和位置与光导管内壁的尺寸相同。检测框中心设置一个检测圈，标识预设光路光斑照射位置。光斑超出检测边框的判定为不良品；光斑在检测边框内的判定为良品。通过对比光斑和检测圈的位置关系，可以判断光斑的偏移方向，从而制定合适的维修策略，避免通过反复试装调整的方法来维修；通过对比光斑和检测圈的大小，同样可以判断出合光部分的特定部件组装有偏差，从而为维修提供指导。通过此检测方法可以快速筛选出不合格的合光系统，而不必待整个光机组装好之后再检测，通过测试，能够为不良品维修提供指导，从而提高生产效率。To sum up, the embodiment of the present invention provides a method for detecting the optical path of a light combining system of a laser projector. The dimensions of the inner wall of the catheter are the same. A detection circle is set in the center of the detection frame to mark the irradiation position of the preset optical path. If the light spot exceeds the detection frame, it is judged as a defective product; if the light spot is within the detection frame, it is judged as a good product. By comparing the positional relationship between the light spot and the detection circle, the offset direction of the light spot can be judged, so as to formulate an appropriate maintenance strategy to avoid repairing by repeated trial installation and adjustment; by comparing the size of the light spot and the detection circle, the combined light can also be judged Some specific components are assembled with deviations to provide guidance for repairs. This detection method can quickly screen out unqualified photosynthesis systems, without having to wait for the entire opto-mechanical assembly to be assembled before testing. Through testing, it can provide guidance for the maintenance of defective products, thereby improving production efficiency.
综上所述，测试合光系统时，通过对比光斑和检测圈的位置关系，可以判断光斑的偏移方向，从而制定合适的维修策略，避免通过反复试装调整的方法来维修；通过对比光斑和检测圈的大小，同样可以判断出合光部分的特定部件组装有偏差，从而为维修提供指导；通过此检测方法可以快速筛选出不合格的合光系统，而不必待整个光机组装好之后再检测，通过测试，能够为不良品维修提供指导，从而提高生产效率。To sum up, when testing the light combining system, by comparing the positional relationship between the light spot and the detection circle, the offset direction of the light spot can be judged, so as to formulate an appropriate maintenance strategy to avoid repairing by repeated trial installation and adjustment; by comparing the light spot And the size of the detection circle, it can also be judged that there are deviations in the assembly of specific components in the light combining part, so as to provide guidance for maintenance; through this detection method, the unqualified light combining system can be quickly screened without waiting for the entire optical machine to be assembled. Detection, through testing, can provide guidance for defective product maintenance, thereby improving production efficiency.
以上所述仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.
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| CN112067256B (en) | 2025-01-24 |
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