WO2019075940A1 - 光源光斑检测方法及检测装置 - Google Patents

光源光斑检测方法及检测装置 Download PDF

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Publication number
WO2019075940A1
WO2019075940A1 PCT/CN2018/071422 CN2018071422W WO2019075940A1 WO 2019075940 A1 WO2019075940 A1 WO 2019075940A1 CN 2018071422 W CN2018071422 W CN 2018071422W WO 2019075940 A1 WO2019075940 A1 WO 2019075940A1
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Prior art keywords
light source
image
spot
industrial camera
aperture
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PCT/CN2018/071422
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English (en)
French (fr)
Inventor
付锦江
胡飞
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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Publication of WO2019075940A1 publication Critical patent/WO2019075940A1/zh
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • 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
    • 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
    • G01J1/4204—Photometry, e.g. photographic exposure meter using electric radiation detectors with determination of ambient light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/02—Testing optical properties

Definitions

  • the invention belongs to the technical field of detection, and particularly relates to a method and a detection device for detecting a light source spot.
  • Optical instruments are everywhere in life, such as projection equipment, and changes in pupil efficiency are an important reason for changing the performance of optical instrument products.
  • changes in pupil efficiency are an important reason for changing the performance of optical instrument products.
  • there are many factors that cause the change in the pupil efficiency such as a change in the shape of the spot, a shift in the position of the spot, and a change in the brightness of the spot. Therefore, detecting the optical efficiency of an optical instrument becomes an important basis for improving the performance of related products.
  • the most common method for detecting the pupil efficiency is to detect the luminous flux of the light source with and without the aperture by the integrating sphere.
  • the detection data is reliable, but the detection method can only provide the detection data result.
  • the specific information of the spot cannot be provided, the test time is long, and the shape and offset of the spot cannot be displayed. Therefore, it is impossible to provide corresponding information for design improvement.
  • the present invention provides a light source spot detection method and a detection device that are simple to detect and highly reliable.
  • the present invention provides a light source spot detection method, including a light source, a test fixture, an aperture, an industrial camera, and an image processor, the method comprising the following steps:
  • Imaging micro-adjusting rotating an image sensor of the industrial camera such that at least one side of the aperture is parallel to at least one edge of an image sensor of the industrial camera;
  • Image acquisition the image sensor of the industrial camera acquires a light-irradiated image when the light source is lit, the light-free image when the light source is turned on, and the ambient light image when the light source is turned off;
  • Data processing performing calculation processing on the data of the pupil image, the image without the pupil, and the ambient light image by an image processor, and acquiring detection parameters of the light source.
  • the method comprises:
  • Fine adjustment adjusting the position of the industrial camera such that the pupil and the spot of the light source are imaged clearly on the image sensor of the industrial camera.
  • the four sides of the aperture are respectively parallel to the four sides of the image sensor of the industrial camera.
  • the diaphragm is mounted to the test fixture.
  • the detection parameter includes a spot shift direction and size of the light source, a spot position, and a pupil efficiency.
  • the pupil efficiency is a sum of the intensity difference values of the apertured image and the ambient light image divided by the sum of the intensity difference values of the un-canopy image and the ambient light image.
  • the image processor presets data processing software, in the data processing step, by using the data processing software, the image with the aperture, the image without the pupil, and the image of the ambient light The data is processed and processed.
  • the data processing software is Matlab.
  • the image processor is a computer.
  • the method further includes:
  • Data recording the industrial camera preset data recording software, wherein the data with the pupil image, the image without the pupil and the image of the ambient light is recorded by the data recording software.
  • rotating the industrial camera includes adjusting an integral constant or a brightness aperture of the industrial camera and causing an image value on an image sensor of the industrial camera to be less than a threshold.
  • the light source is a laser light source.
  • the invention also provides a light source spot detection device, comprising:
  • test fixture for assembling a light source to be tested
  • a light beam located in a light exiting direction of the light source and spaced apart from the light source, the mounting is positioned on the test fixture;
  • An industrial camera located in a light exiting direction of the light source, spaced apart from the diaphragm and located on a side of the aperture away from the test fixture, the industrial camera for collecting a belt when the light source is illuminated a pupil image, an un-photon image when the light source is lit, and an ambient light image when the light source is off;
  • an image processor configured to perform calculation processing on the data of the aperture image, the image without the aperture, and the ambient light image, to acquire detection parameters of the light source.
  • the test fixture comprises a base, a support frame fixedly supported on the base for assembling the locking light source, a sliding slot opened on the base, and a slide rail stuck in the sliding slot, the slide rail A slide rail body slidably engaged with the chute and a splint extending from the slide rail body, the diaphragm being fixed to the splint.
  • the light source is locked to the support frame by a positioning pin and a locking screw.
  • the spot image and the pupil image of the light source to be tested at the pupil are simultaneously obtained by the industrial camera, and the image of the pupil and the spot image are Comparing the relative position calculation, obtaining the direction and magnitude of the spot shift of the light source, and obtaining the light intensity of the light source by calculating the intensity value of the light source on the image plane of the image processor through the image with and without the pupil image
  • the efficiency is such that the spot shape of the light source, the change in position, and the change in the pupil efficiency of the light source are obtained in the detection.
  • the detection method and the detection device are not only simple, the detection efficiency is high, the accuracy is good, and the cost is low, and the detected spot shape is small, the position change and the light source efficiency of the light source can provide a reliable basis for the product improvement design.
  • FIG. 1 is a schematic structural view of a light source of a light source spot shift detecting device according to the present invention
  • FIG. 2 is a partial structural view of a light source spot shift detecting device of the present invention, in which a light source has been assembled.
  • FIG. 3 is a flow chart of a light source spot shift detecting method according to the present invention.
  • FIG. 4 is a schematic diagram of an image of a light source when the light source collected by the light source is illuminated, a light-free image when the light source is turned on, and an ambient light image when the light source is turned off. ;
  • FIG. 5 is a diagram showing a pupil image when the light source collected by the image is illuminated in the light source spot shift detecting method of the present invention.
  • the present invention also provides a light source spot detection apparatus 100, including: a test fixture 1, a light barrier 2, an industrial camera 3, and an image processor 4.
  • the test fixture 1 is used to assemble a light source 10 to be locked.
  • the test fixture 1 includes a base 11 , a support frame 12 fixedly supported by the base 11 for locking the light source 10 , a sliding slot 13 formed on the base 11 , and a slot Slide rail 14 within 13.
  • the light source 10 is assembled and locked to the support frame 12 by a positioning pin 20 and a locking screw (not shown).
  • a laser light source is used as a detection target.
  • the fixing manner of the light source 10 is not limited thereto, and the fixing and fixing manner of the positioning pin 20 and the locking screw is only a convenient manner of assembly and disassembly.
  • the slide rail 14 includes a slide rail body 141 that slides in cooperation with the slide slot 13 and a clamp plate 142 that extends from the slide rail body 141.
  • the rail body 141 slides along the sliding slot 13; the clamping plate 142 moves with the sliding of the rail body 141.
  • the diaphragm 2 is located in the light exiting direction of the light source 10 and spaced apart from the light source 10 and mounted and positioned on the test fixture 1 .
  • the diaphragm 2 is fixed to the clamping plate 142, is supported by the clamping plate 142 in the light emitting direction of the light source 10, and is slidable along the sliding slot 13 by the sliding rail 14 to adjust the position.
  • the position of the aperture 2 is described, which facilitates the position adjustment of the aperture 2.
  • the aperture 2 has a rectangular structure surrounded by four sides.
  • the industrial camera 3 is located in the light exiting direction of the light source 10, which is spaced apart from the aperture 2 and is located on a side of the aperture 2 remote from the test fixture 1.
  • the light source 10, the aperture 2, and the industrial camera 3 are located in the light-emitting direction of the light source 10 and are sequentially disposed at intervals.
  • the industrial camera 3 is configured to capture a light-irradiated image when the light source 10 is turned on, a light-free image when the light source 10 is turned on, and an ambient light image when the light source 10 is turned off.
  • the industrial camera 3 comes with an image sensor (Charge-coupled Device, CCD), that is, acquisition by the CCD.
  • CCD Charge-coupled Device
  • the industrial camera 3 presets data recording software, such as Labview software, but is not limited thereto.
  • data recording software such as Labview software
  • the data of the pupil image, the pupil-free image, and the ambient light image are recorded by the data recording software.
  • the setting of the data recording software facilitates recording and backup of the collected image data, facilitating subsequent data processing and data call analysis.
  • the image processor 4 is configured to perform calculation processing on the data of the aperture image, the image without the pupil, and the image of the ambient light image acquired by the industrial camera 3, and acquire detection parameters of the light source.
  • the image processor 4 is a computer or a PAD or the like.
  • the data processing software is preset in the image processor 4, such as installing Matlab software, but is not limited thereto. Thereby, the calculation processing of the data of each image collected above is performed, and finally the detection parameters of the light source, such as the direction and size of the spot shift of the light source 10, the spot position and the pupil efficiency, are obtained.
  • the present invention also provides a light source spot detecting method.
  • the light source spot detection method is described by taking the light source spot detection device 100 provided by the present invention as an example, and is specifically as follows:
  • the light source spot detection method includes providing the light source 10, the test fixture 1, the aperture 2, the industrial camera 3, and the image processor 4 to be detected.
  • the light source 10 is a laser light source, which is of course not limited thereto, and the laser light source has strong directivity and high test accuracy.
  • the diaphragm is a rectangular structure surrounded by four sides.
  • the industrial camera comes with a Charge-coupled Device (CCD), and preset installation data recording software, such as Labview software, of course, is not limited thereto.
  • CCD Charge-coupled Device
  • Labview software preset installation data recording software
  • the image processor is a computer or a PAD, etc.
  • the data processing software is preset in the image processor, for example, the Matlab software is installed, and the software has excellent data processing and simulation functions, so that the processing result is more accurate.
  • the method includes the following steps:
  • the light source 10 is assembled to the test fixture 1 and locked, and the aperture 2 and the industrial camera 3 are sequentially disposed in a light-emitting direction of the light source 10, and the aperture 2 is sandwiched between The light source 10 and the industrial camera 3 are disposed between and spaced apart from each other.
  • the diaphragm 2 is mounted and positioned on the test fixture 1.
  • the position of the diaphragm 2 can be conveniently adjusted by the sliding structure of the test fixture 1 to improve the detection efficiency.
  • Step S2 position adjustment to initial imaging
  • the position of the industrial camera 3 and the aperture 2 is adjusted such that the aperture of the aperture 2 and the light source 10 is clearly imaged on an image sensor (not shown) of the industrial camera 3.
  • this step S2 specifically includes:
  • Step S21 coarse adjustment, coarsely adjusting the position of the industrial camera 3 and the aperture 2, and imaging the aperture of the aperture 2 and the light source 10 on the image sensor of the industrial camera 3;
  • Step S22 fine adjustment, adjusting the position of the industrial camera 3, so that the spot of the aperture 2 and the light source 10 is clearly imaged on the image sensor of the industrial camera 3.
  • the position of the industrial camera 3 when adjusted, it can be adjusted by setting a displacement adjusting mechanism (not shown), so that the adjustment precision is high and the speed is fast.
  • the coarse adjustment and the coarse adjustment make the adjustment efficiency and the accuracy high.
  • the light spot of the light source 10 is a rectangular spot.
  • the light beam emitted by the light source 10 is shaped by a light shaping element such as a square bar (not shown) or a fly-eye lens pair (not shown). And get.
  • Step S3 imaging fine adjustment
  • the industrial camera 3 is rotated such that at least one side of the aperture 2 is parallel to at least one side of the image sensor of the industrial camera 3.
  • the four sides of the aperture 2 are respectively parallel to the four sides of the image sensor of the industrial camera 3.
  • rotating the industrial camera 3 includes adjusting an integral constant and/or a brightness aperture of the industrial camera 3, and making an image value on the image sensor of the industrial camera 3 smaller than a threshold.
  • Step S4 image acquisition
  • the image of the industrial camera 3 is used to capture the illuminated image A when the light source 10 is turned on, the un-bounced image B when the light source 10 is turned on, and the light source 10. Ambient light image C when extinguished.
  • the image with the aperture A is the image obtained by the light source 10 lighting and the spot passing through the aperture 2
  • the image without the light B is the image of the light source 10 being lit and the spot is not collected by the light
  • the ambient light image C is an image obtained by the light source 10 not being lit and the aperture 2 being pulled apart (e.g., by the sliding of the slide rail 14 along the chute 13 to move the diaphragm away from the light exiting direction of the light source 10).
  • the industrial camera 3 preset data recording software such as Labview software, is not limited thereto, and the image with the aperture A, the image without the aperture B and the image of the ambient light C are recorded by the data recording software Labview.
  • the data is not limited thereto, and the image with the aperture A, the image without the aperture B and the image of the ambient light C are recorded by the data recording software Labview. The data.
  • the setting of the data recording software facilitates recording and backup of the collected image data, facilitating subsequent data processing and data call analysis.
  • the image processor 4 performs calculation processing on the data of the aperture image A, the aperture-free image B, and the ambient light image C, and acquires detection parameters of the light source 10.
  • the data processing software is Matlab, but is not limited thereto.
  • the data processing software Matlab has excellent data processing and simulation functions, which makes the processing result more accurate.
  • the detection parameters include a spot shift direction and size of the light source 10, a spot position, and a pupil efficiency.
  • the distance from the light spot of the light source 10 to each side of the aperture 2, that is, the light spot of the light source, can be obtained.
  • Offset direction and size
  • a geometric side length of the aperture 2 is a
  • the side length a of the aperture 2 occupies the number of pixels of the image sensor 4, and the spot is at the edge of the aperture 2.
  • the number of pixels is n1, n2, n3, n4, respectively, and the distances of the spots to the sides of the aperture 2 are n1a/m, n2a/m, n3a/m and n4a/m, respectively.
  • A1 is the CCD image frame
  • A2 is the aperture on the CCD
  • A3 is the spot imaging.
  • the offset size can be represented by a positive or negative value, that is, positive and negative are defined as directions. Of course, the direction of the offset can also be judged visually.
  • the relative position of the spot to each side of the aperture 2 can be detected at different times by the source spot detection method of the present invention, and the direction and size of the spot shift and the spot position can be known by comparative analysis.
  • the shape of the spot at each test can be clearly known from the image with the aperture A, the image without the aperture B, and the ambient light image C, and the three sets of image data corresponding to the image recorded by the Labview software are imported.
  • the data processing software Matlab can process the data to find the pupil efficiency of the light source:
  • the pupil efficiency is the sum of the intensity difference values of the apertured image A and the ambient light image C divided by the sum of the intensity differences of the no-optical image B and the ambient light image C.
  • the spot image and the pupil image of the light source to be tested at the pupil are simultaneously obtained by the industrial camera, and the image of the pupil and the spot image are Comparing the relative position calculation, obtaining the direction and magnitude of the spot shift of the light source, and obtaining the light intensity of the light source by calculating the intensity value of the light source on the image plane of the image processor through the image with and without the pupil image
  • the efficiency is such that the spot shape of the light source, the change in position, and the change in the pupil efficiency of the light source are obtained in the detection.
  • the detection method and the detecting device are not only simple, the detection efficiency is high, the accuracy is good, and the cost is low, and the data such as the shape size of the spot, the position change and the pupil efficiency of the light source can provide a reliable basis for the product improvement design.

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Abstract

一种光源光斑检测方法及检测装置（100），检测装置（100）包括测试夹具（1）、光阑（2）、工业相机（3）及图像处理器（4），方法包括如下步骤：检测准备（S1）、位置调节至初成像（S2）、成像微调节（S3）、图像采集（S4）、数据处理（S6）。光源光斑检测方法及检测装置（100）不仅方法简单，检测效率高，准确性好，且成本低，检测的数据为产品改进设计提供可靠的依据。

Description

光源光斑检测方法及检测装置 技术领域
本发明属于检测技术领域，具体涉及光源光斑检测方法及检测装置。
 
 背景技术
光学仪器在生活中随处可见，如投影设备，而光阑效率的变化是改变光学仪器产品的性能的一个重要原因。相关技术的光学仪器中，引起光阑效率改变的因素较多，如光斑形状发生变化、光斑位置发生偏移以及光斑亮度发生改变等。因此，检测光学仪器的光阑效率成为改进相关产品性能的重要依据。
 技术问题
对于激光光源来说，目前检测光阑效率最常见的方法是通过积分球分别来检测光源带光阑和不带光阑时的光通量，该检测数据可靠，但该检测方法只能提供检测数据结果，不能提供光斑的具体信息，测试时间较长，无法显示光斑的形状及偏移，因此，无法为设计的改进提供相应的信息。
因此，实有必要提供一种新的光源光斑检测方法及检测装置解决上述问题。
 技术解决方案
针对以上现有技术的不足，本发明提出一种检测简单且可靠性强的光源光斑检测方法及检测装置。
为了解决上述技术问题，本发明提供了一种光源光斑检测方法，包括光源、测试夹具、光阑、工业相机及图像处理器，该方法包括如下步骤：
检测准备，将所述光源组装于所述测试夹具并锁紧，将所述光阑和所述工业相机依次设置于所述光源的出光方向上，所述光阑夹设于所述光源及所述工业相机之间且相互间隔设置；
位置调节至初成像，调节所述工业相机与所述光阑的位置，使所述光阑及所述光源的光斑在所述工业相机的图像传感器上成像清晰；
成像微调节，旋转所述工业相机的图像传感器，使所述光阑的至少一条边与所述工业相机的图像传感器的至少一条边平行；
图像采集，通过所述工业相机的图像传感器采集所述光源点亮时的带光阑图像、所述光源点亮时的不带光阑图像和所述光源熄灭时的环境光图像；
数据处理，通过图像处理器对所述带光阑图像、所述不带光阑图像及所述环境光图像的数据进行计算处理，获取所述光源的检测参数。
优选的，在所述位置调节成像的步骤中，包括：
粗调，粗调所述工业相机与所述光阑的位置，使所述光阑及所述光源的光斑在所述工业相机的图像传感器上成像；
精调，调节所述工业相机的位置，使所述光阑及所述光源的光斑在所述工业相机的图像传感器上成像清晰。
优选的，在所述成像微调节步骤中，使所述光阑的四条边分别与所述工业相机的图像传感器的四条边分别平行。
优选的，所述光阑安装定位于所述测试夹具。
优选的，在所述数据处理的步骤中，所述检测参数包括所述光源的光斑偏移方向和大小、光斑位置及光阑效率。
优选的，所述光阑效率为所述带光阑图像与所述环境光图像的强度差值的总和除以所述不带光阑图像与所述环境光图像的强度差值的总和。
优选的，所述图像处理器预设数据处理软件，在所述数据处理步骤中，通过所述数据处理软件对所述带光阑图像、所述不带光阑图像及所述环境光图像的数据进行计算处理。
优选的，所述数据处理软件为Matlab。
优选的，所述图像处理器为电脑。
优选的，在所述图像采集步骤后，还包括:
数据记录，所述工业相机预设数据记录软件，通过所述数据记录软件记录所述带光阑图像、所述不带光阑图像及所述环境光图像的数据。
优选的，在所述成像微调节的步骤中，旋转所述工业相机包括调节所述工业相机的积分常数或亮度光圈，并使所述工业相机的图像传感器上的图像值小于阈值。
优选的，所述光源为激光光源。
本发明同时还提供一种光源光斑检测装置，包括：
测试夹具，用于装配锁紧待测的光源；
光阑，位于所述光源的出光方向并与所述光源间隔设置，其安装定位于所述测试夹具；
工业相机，位于所述光源的出光方向，其与所述光阑间隔设置且位于所述光阑的远离所述测试夹具的一侧，所述工业相机用于采集所述光源点亮时的带光阑图像、所述光源点亮时的不带光阑图像和所述光源熄灭时的环境光图像；及
图像处理器，用于对所述带光阑图像、所述不带光阑图像及所述环境光图像的数据进行计算处理，获取所述光源的检测参数。
优选的，所述测试夹具包括底座，固定支撑于底座的用于装配锁紧光源的支撑架、开设于所述底座的滑槽和卡设于所述滑槽内的滑轨，所述滑轨包括与所述滑槽配合滑动的滑轨本体和由所述滑轨本体延伸的夹板，所述光阑固定于所述夹板。
优选的，所述光源通过定位销和锁紧螺钉装配锁紧于所述支撑架。
 有益效果
与相关技术相比，本发明的光源光斑检测方法中，通过所述工业相机同时获得待测的光源在所述光阑处的光斑图像及光阑图像，通过所述光阑图像与光斑图像的相对位置的比较计算，得出光源的光斑偏移的方向及大小，通过计算所述光源通过带光阑图像和不带光阑图像在图像处理器成像面上强度值，得到所述光源的光阑效率，从而在检测中得到所述光源的光斑形状，位置的变化以及光源的光阑效率的变化。该检测方法和检测装置不仅简单，检测效率高，准确性好，且成本低，检测得到的光斑形状小大，位置的变化以及光源的光阑效率等数据可供产品改进设计提供可靠的依据。
 附图说明
下面结合附图详细说明本发明。通过结合以下附图所作的详细描述，本发明的上述或其他方面的内容将变得更清楚和更容易理解。附图中：
图1为本发明光源光斑偏移检测装置装配光源的结构示意图；
图2为本发明光源光斑偏移检测装置部分结构示意图，其中光源已装配。
图3为本发明光源光斑偏移检测方法的流程图；
图4为本发明光源光斑偏移检测方法中图采集的所述光源点亮时的带光阑图像、所述光源点亮时的不带光阑图像和所述光源熄灭时的环境光图像示意图；
图5为本发明光源光斑偏移检测方法中图采集的所述光源点亮时的带光阑图像。
 
 本发明的实施方式
下面结合附图详细说明本发明的具体实施方式。
在此记载的具体实施方式/实施例为本发明的特定的具体实施方式，用于说明本发明的构思，均是解释性和示例性的，不应解释为对本发明实施方式及本发明范围的限制。除在此记载的实施例外，本领域技术人员还能够基于本申请权利要求书和说明书所公开的内容采用显而易见的其它技术方案，这些技术方案包括采用对在此记载的实施例的做出任何显而易见的替换和修改的技术方案，都在本发明的保护范围之内。
请同时参阅图1-2所示，本发明同时提供一种光源光斑检测装置100，包括：测试夹具1、光阑2、工业相机3和图像处理器4。
所述测试夹具1用于装配锁紧待测的光源10。
具体的，所述测试夹具1包括底座11，固定支撑于底座11的用于装配锁紧所述光源10的支撑架12、开设于所述底座11的滑槽13和卡设于所述滑槽13内的滑轨14。
所述光源10通过定位销20和锁紧螺钉（图未示）装配锁紧于所述支撑架12。本实施方式中采用激光光源作为检测对象进行说明。
当然，所述光源10的固定方式并不限于此，定位销20和锁紧螺钉的装配固定方式仅为一种方便装配和拆卸的方式。
所述滑轨14包括与所述滑槽13配合滑动的滑轨本体141和由所述滑轨本体141延伸的夹板142。
所述滑轨本体141沿所述滑槽13滑动；所述夹板142随所述滑轨本体141的滑动而移动。
所述光阑2位于所述光源10的出光方向并与所述光源10间隔设置且安装定位于所述测试夹具1。
本实施方式中，所述光阑2固定于所述夹板142，通过所述夹板142支撑于所述光源10的出光方向上，且通过所述滑轨14沿所述滑槽13滑动可调节所述光阑2的位置，该结构方便所述光阑2的位置调节。
本实施方式中，所述光阑2呈四边围成的矩形结构。
所述工业相机3位于所述光源10的出光方向，其与所述光阑2间隔设置且位于所述光阑2的远离所述测试夹具1的一侧。
即，本实施方式中，所述光源10、所述光阑2及所述工业相机3位于所述光源10的出光方向上且依次间隔设置。
所述工业相机3用于采集所述光源10点亮时的带光阑图像、所述光源10点亮时的不带光阑图像和所述光源10熄灭时的环境光图像。所述工业相机3自带图像传感器（Charge-coupled Device，CCD），即通过所述CCD实现采集。
所述工业相机3预设数据记录软件，比如Labview软件，但不限于此。通过所述数据记录软件记录所述带光阑图像、所述不带光阑图像及所述环境光图像的数据。所述数据记录软件的设置方便对采集的图像数据进行记录与备份，方便后续的数据处理及数据调用分析。
所述图像处理器4用于对所述工业相机3采集的所述带光阑图像、所述不带光阑图像及所述环境光图像的数据进行计算处理，获取所述光源的检测参数。
具体的，所述图像处理器4为电脑或PAD等。所述图像处理器4内预设安装数据处理软件，比如安装Matlab软件，但不限于此。从而实现对上述采集的各图像的数据进行计算处理，最终获取所述光源的检测参数，如所述光源10的光斑偏移方向和大小、光斑位置及光阑效率。
为了进一步对所述光源光斑检测装置100进行理解，本发明同时提供了一种光源光斑检测方法。本实施方式中，所述光源光斑检测方法以本发明提供的上述光源光斑检测装置100为例进行说明，具体如下：
所述光源光斑检测方法包括提供待检测的所述光源10、测试夹具1、光阑2、工业相机3及图像处理器4。
本实施方式中，所述光源10为激光光源，当然不限于此，激光光源的方向性强，测试准确度更高。
所述光阑为四边围成的矩形结构。
所述工业相机自带图像传感器（Charge-coupled Device，CCD），及预设安装数据记录软件，比如Labview软件，当然不限于此。
所述图像处理器为电脑或PAD等，所述图像处理器内预设安装数据处理软件，比如安装Matlab软件，该软件数据处理及仿真功能优，使得处理结果更准确。
请结合参图3所示，该方法包括如下步骤：
步骤S1、检测准备
将所述光源10组装于所述测试夹具1并锁紧，将所述光阑2和所述工业相机3依次设置于所述光源10的出光方向上，所述光阑2夹设于所述光源10及所述工业相机3之间且相互间隔设置。
本步骤中，具体的，所述光阑2安装定位于所述测试夹具1。通过所述测试夹具1的滑动结构可方便调节所述光阑2的位置，提高检测效率。
步骤S2、位置调节至初成像
调节所述工业相机3与所述光阑2的位置，使所述光阑2及所述光源10的光斑在所述工业相机3的图像传感器（图未示）上成像清晰。
具体的，本步骤S2具体包括：
步骤S21、粗调，粗调所述工业相机3与所述光阑2的位置，使所述光阑2及所述光源10的光斑在所述工业相机3的图像传感器上成像；
步骤S22、精调，调节所述工业相机3的位置，使所述光阑2及所述光源10的光斑在所述工业相机3的图像传感器上成像清晰。其中，调节所述工业相机3的位置时，可通过设置位移调节机构（图未示）进行调节，使其调节精度高，速度快。而该步骤中，通过粗调和粗调，使得调节效率和准确效率高。
本实施方式中，所述光源10的光斑为矩形光斑，具体的，其由光源10所发出的光束经过例如方棒（图未示）、复眼透镜对（图未示）等光整形元件的整形而获得。
步骤S3、成像微调节
旋转所述工业相机3，使所述光阑2的至少一条边与所述工业相机3的图像传感器的至少一条边平行。
更优的，为了使数据处理简单，本步骤中，使所述光阑2的四条边分别与所述工业相机3的图像传感器的四条边分别平行。
具体的，旋转所述工业相机3包括调节所述工业相机3的积分常数和/或亮度光圈，并使所述工业相机3的图像传感器上的图像值小于阈值即可。
步骤S4、图像采集
请结合图4所示，通过所述工业相机3的图像传感器采集所述光源10点亮时的带光阑图像A、所述光源10点亮时的不带光阑图像B和所述光源10熄灭时的环境光图像C。
其中，所述带光阑图像A是光源10点亮和光斑过光阑2采集得到的图像，不带光阑图像B是光源10点亮和光斑不过光阑2采集得到的图像，环境光图像C是光源10不点亮和光阑2被拉开（如通过所述滑轨14沿所述滑槽13滑动使所述光阑移动至远离所述光源10的出光方向上）采集得到的图像。
步骤S5、数据记录
所述工业相机3预设数据记录软件，比如Labview软件，不限于此，通过所述数据记录软件Labview记录所述带光阑图像A、所述不带光阑图像B及所述环境光图像C的数据。
所述数据记录软件的设置方便对采集的图像数据进行记录与备份，方便后续的数据处理及数据调用分析。
步骤S6、数据处理
通过图像处理器4对所述带光阑图像A、所述不带光阑图像B及所述环境光图像C的数据进行计算处理，获取所述光源10的检测参数。
所述数据处理软件为Matlab，但不限于此。该数据处理软件Matlab数据处理及仿真功能优，使得处理结果更准确。
所述检测参数包括所述光源10的光斑偏移方向和大小、光斑位置及光阑效率。
请结合参图5所示，具体的，通过对所述带光阑图像A进行数据处理，可以求出所述光源10的光斑到所述光阑2各边的距离，即所述光源的光斑偏移方向和大小：
假设所述光阑2的一几何边长为a，由所述带光阑图像A可知该光阑2的边长a占据图像传感器4的像素数为m，光斑到所述光阑2边缘的像素个数分别为n1，n2，n3，n4，则光斑到所述光阑2各边的距离分别为n1a/m，n2a/m，n3a/m和n4a/m。其中，A1为CCD图像边框，A2为光阑在CCD上成像，A3为光斑成像。其中偏移大小可由正负值表示，即正负定义为方向。当然，偏移方向也可目测判断。
在光源10老化期间，通过本发明的光源光斑检测方法在不同时间可以检测得到光斑与所述光阑2各边的相对位置，通过比较分析便可以知道光斑偏移的方向和大小和光斑位置。
由所述带光阑图像A、不带光阑图像B及所述环境光图像C可以清楚的知道每次测试时光斑的形状，将Labview软件记录下的对应上述图像的三组图像数据导入数据处理软件Matlab，对数据进行处理可以求出光源的光阑效率：
所述光阑效率为所述带光阑图像A与所述环境光图像C的强度差值的总和除以所述不带光阑图像B与所述环境光图像C的强度差值的总和。
与相关技术相比，本发明的光源光斑检测方法中，通过所述工业相机同时获得待测的光源在所述光阑处的光斑图像及光阑图像，通过所述光阑图像与光斑图像的相对位置的比较计算，得出光源的光斑偏移的方向及大小，通过计算所述光源通过带光阑图像和不带光阑图像在图像处理器成像面上强度值，得到所述光源的光阑效率，从而在检测中得到所述光源的光斑形状，位置的变化以及光源的光阑效率的变化。该检测方法和检测装置不仅简单，检测效率高，准确性好，且成本低，检测得到的光斑形状大小，位置的变化以及光源的光阑效率等数据可供产品改进设计提供可靠的依据。
需要说明的是，以上参照附图所描述的各个实施例仅用以说明本发明而非限制本发明的范围，本领域的普通技术人员应当理解，在不脱离本发明的精神和范围的前提下对本发明进行的修改或者等同替换，均应涵盖在本发明的范围之内。此外，除上下文另有所指外，以单数形式出现的词包括复数形式，反之亦然。另外，除非特别说明，那么任何实施例的全部或一部分可结合任何其它实施例的全部或一部分来使用。
 

Claims (16)

1、一种光源光斑检测方法，包括光源、测试夹具、光阑、工业相机及图像处理器，其特征在于，该方法包括如下步骤：
检测准备，将所述光源组装于所述测试夹具并锁紧，将所述光阑和所述工业相机依次设置于所述光源的出光方向上，所述光阑夹设于所述光源及所述工业相机之间且相互间隔设置；
位置调节至初成像，调节所述工业相机与所述光阑的位置，使所述光阑及所述光源的光斑在所述工业相机的图像传感器上成像清晰；
成像微调节，旋转所述工业相机的图像传感器，使所述光阑的至少一条边与所述工业相机的图像传感器的至少一条边平行；
图像采集，通过所述工业相机的图像传感器采集所述光源点亮时的带光阑图像、所述光源点亮时的不带光阑图像和所述光源熄灭时的环境光图像；
数据处理，通过图像处理器对所述带光阑图像、所述不带光阑图像及所述环境光图像的数据进行计算处理，获取所述光源的检测参数。
2、根据权利要求1所述的光源光斑检测方法，其特征在于，在所述位置调节成像的步骤中，包括：
粗调，粗调所述工业相机与所述光阑的位置，使所述光阑及所述光源的光斑在所述工业相机的图像传感器上成像；
精调，调节所述工业相机的位置，使所述光阑及所述光源的光斑在所述工业相机的图像传感器上成像清晰。
3、根据权利要求1所述的光源光斑检测方法，其特征在于，在所述成像微调节步骤中，使所述光阑的四条边分别与所述工业相机的图像传感器的四条边分别平行。
4、根据权利要求1所述的光源光斑检测方法，其特征在于，所述光阑安装定位于所述测试夹具。
5、根据权利要求1所述的光源光斑检测方法，其特征在于，在所述数据处理的步骤中，所述检测参数包括所述光源的光斑偏移方向和大小、光斑位置及光阑效率。
6、根据权利要求5所述的光源光斑检测方法，其特征在于，所述光斑偏移方向和大小为所述光源的光斑到所述光阑各边的距离。
7、根据权利要求5所述的光源光斑检测方法，其特征在于，所述光阑效率为所述带光阑图像与所述环境光图像的强度差值的总和除以所述不带光阑图像与所述环境光图像的强度差值的总和。
8、根据权利要求1所述的光源光斑检测方法，其特征在于，所述图像处理器预设数据处理软件，在所述数据处理步骤中，通过所述数据处理软件对所述带光阑图像、所述不带光阑图像及所述环境光图像的数据进行计算处理。
9、根据权利要求8所述的光源光斑检测方法，其特征在于，所述数据处理软件为Matlab。
10、根据权利要求1所述的光源光斑检测方法，其特征在于，所述图像处理器为电脑。
11、根据权利要求1所述的光源光斑检测方法，其特征在于，在所述图像采集步骤后，还包括:
数据记录，所述工业相机预设数据记录软件，通过所述数据记录软件记录所述带光阑图像、所述不带光阑图像及所述环境光图像的数据。
12、根据权利要求1所述的光源光斑检测方法，其特征在于，在所述成像微调节的步骤中，旋转所述工业相机包括调节所述工业相机的积分常数或亮度光圈，并使所述工业相机的图像传感器上的图像值小于阈值。
13、根据权利要求1所述的光源光斑检测方法，其特征在于，所述光源为激光光源。
14、一种光源光斑检测装置，其特征在于，包括：
测试夹具，用于装配锁紧待测的光源；
光阑，位于所述光源的出光方向并与所述光源间隔设置，其安装定位于所述测试夹具；
工业相机，位于所述光源的出光方向，其与所述光阑间隔设置且位于所述光阑的远离所述测试夹具的一侧，所述工业相机用于采集所述光源点亮时的带光阑图像、所述光源点亮时的不带光阑图像和所述光源熄灭时的环境光图像；及
图像处理器，用于对所述带光阑图像、所述不带光阑图像及所述环境光图像的数据进行计算处理，获取所述光源的检测参数。
15、根据权利要求14所述的光源光斑检测装置，其特征在于，所述测试夹具包括底座，固定支撑于底座的用于装配锁紧光源的支撑架、开设于所述底座的滑槽和卡设于所述滑槽内的滑轨，所述滑轨包括与所述滑槽配合滑动的滑轨本体和由所述滑轨本体延伸的夹板，所述光阑固定于所述夹板。
16、根据权利要求15所述的光源光斑检测装置，其特征在于，所述光源通过定位销和锁紧螺钉装配锁紧于所述支撑架。
 
 
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