CN102004390B - Lens module detection system and detection method thereof - Google Patents
Lens module detection system and detection method thereof Download PDFInfo
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- CN102004390B CN102004390B CN200910306235.2A CN200910306235A CN102004390B CN 102004390 B CN102004390 B CN 102004390B CN 200910306235 A CN200910306235 A CN 200910306235A CN 102004390 B CN102004390 B CN 102004390B
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Abstract
一种镜头模组检测系统,该检测系统用于检测镜头模组中的镜筒与音圈马达的可动筒之间的倾角,该检测系统包括光源装置及一分析装置。光源装置包括一光源及一位置记录装置。光源用于发出激光束,并照射在镜筒与音圈马达的可动筒之间的间隙内。该发出的激光束经镜筒的外侧壁反射至位置记录装置,并在该记录装置上形成光斑点。位置记录装置记录该光斑点位置。所述分析装置用于分析光斑点与光源发出光束的位置相对偏移的距离是否在误差允许范围内。所述的镜头模组中镜筒与音圈马达利用上述镜头模组检测系统进行倾角检测,因此,可提高镜头模组的产品质量。
A lens module detection system, the detection system is used to detect the inclination between the lens barrel in the lens module and the movable barrel of the voice coil motor, the detection system includes a light source device and an analysis device. The light source device includes a light source and a position recording device. The light source is used to emit a laser beam, which is irradiated in the gap between the lens barrel and the movable barrel of the voice coil motor. The emitted laser beam is reflected to the position recording device through the outer wall of the lens barrel, and forms a light spot on the recording device. The position recording device records the position of the light spot. The analysis device is used to analyze whether the relative offset distance between the light spot and the position of the light beam emitted by the light source is within the allowable range of error. The lens barrel and the voice coil motor in the lens module use the lens module detection system to detect the inclination angle, so the product quality of the lens module can be improved.
Description
技术领域 technical field
本发明涉及一种镜头模组检测系统及其检测方法。The invention relates to a lens module detection system and a detection method thereof.
背景技术 Background technique
近年来,随着光学产品的发展,镜头模组的应用范围持续扩大,如数码相机、具有照相功能的手机等电子产品。对于电子产品,特别是消费性电子产品,其发展趋势是轻量化和薄型化,相应设置于其内的镜头模组也变得越来越小,对精密度的要求也越来越高,所以镜头模组的组装工艺也需要更高的精确度和稳定性,以保证生产效率和良率。然而,在组装的过程中,可能由于对位不准,或是产品公差,镜头模组旋入音圈马达的可动筒后,在镜头模组与可动筒之间会或多或少地存在一定倾角,然而该倾角的大小难以用常规的角度测量装置来测量,且倾角是否在可以允许的误差范围之内必须要经过测量后才能判断。如果所述倾角过大会使镜头模组对焦不准,影响了产品质量。所以说如何简单方便地实现对镜头模组与音圈马达之间的倾角检测,成为本领域亟待解决的问题。In recent years, with the development of optical products, the scope of application of lens modules continues to expand, such as digital cameras, mobile phones with camera functions and other electronic products. For electronic products, especially consumer electronic products, the development trend is light weight and thinner, and the corresponding lens modules are getting smaller and smaller, and the requirements for precision are getting higher and higher, so The assembly process of lens modules also requires higher precision and stability to ensure production efficiency and yield. However, during the assembly process, due to misalignment or product tolerances, after the lens module is screwed into the movable barrel of the voice coil motor, there will be more or less gaps between the lens module and the movable barrel. There is a certain inclination angle, but the size of the inclination angle is difficult to measure with a conventional angle measuring device, and whether the inclination angle is within the allowable error range must be measured before judging. If the inclination angle is too large, the focus of the lens module will be inaccurate, which will affect the product quality. Therefore, how to simply and conveniently realize the inclination detection between the lens module and the voice coil motor has become an urgent problem to be solved in this field.
发明内容 Contents of the invention
有鉴于此,有必要提供一种可以检测镜头模组的检测系统及其检测方法。In view of this, it is necessary to provide a detection system capable of detecting lens modules and a detection method thereof.
一种镜头模组检测系统,该检测系统用于检测镜头模组中的镜筒与音圈马达的可动筒之间的倾角,该检测系统包括:A lens module detection system, the detection system is used to detect the tilt angle between the lens barrel in the lens module and the movable barrel of the voice coil motor, the detection system includes:
一光源装置包括一光源及一位置记录装置,光源用于发出激光束,并照射在镜筒与音圈马达的可动筒之间的间隙,该发出的激光束经镜筒的外侧壁反射至位置记录装置,并在该记录装置上形成光斑点,位置记录装置记录该光斑点位置,同时计算该光斑点与所述光源发出光束的位置的距离;A light source device includes a light source and a position recording device, the light source is used to emit a laser beam, and irradiates the gap between the lens barrel and the movable barrel of the voice coil motor, and the emitted laser beam is reflected by the outer wall of the lens barrel to the A position recording device, and form a light spot on the recording device, the position recording device records the position of the light spot, and simultaneously calculates the distance between the light spot and the position where the light source emits a light beam;
一分析装置用于分析该光斑点与光源发出光束的位置相对偏移的距离是否在误差允许范围内。An analysis device is used to analyze whether the relative offset distance between the spot of light and the position of the light beam emitted by the light source is within the allowable range of error.
相对于现有技术,所述的镜头模组中镜筒与音圈马达利用上述镜头模组检测系统进行倾角检测,因此,可提高镜头模组的产品质量。Compared with the prior art, the lens barrel and the voice coil motor in the lens module use the lens module detection system to detect the inclination angle, so the product quality of the lens module can be improved.
附图说明 Description of drawings
图1是本发明实施方式提供的镜头模组检测系统立体结构示意图;FIG. 1 is a schematic diagram of a three-dimensional structure of a lens module detection system provided by an embodiment of the present invention;
图2是图1中的镜头模组检测系统的工作状态示意图。FIG. 2 is a schematic diagram of the working state of the lens module detection system in FIG. 1 .
具体实施方式 Detailed ways
下面将结合附图,对本发明作进一步的详细说明。The present invention will be further described in detail below in conjunction with the accompanying drawings.
请参阅图1,为本发明实施方式的镜头模组检测系统100,其用于检测镜头模组40的倾角。该镜头模组40包括一个音圈马达42和一个镜筒44。所述镜筒44套设于音圈马达42的可动筒420内。该镜头模组检测系统100包括一承载装置10、一光源装置20、一分析装置30。Please refer to FIG. 1 , which is a lens
所述承载装置10包括一承载座12及一用于驱动承载座12旋转的致动器14。所述承载座10开设有一四方体的收容槽120,其用于检测时收容所述待检测的镜头模组40。可以理解,收容槽120的形状不限于方形,其应随待检测的镜头模组的形状而定。本实施方式中,所述致动器14为一旋转马达,其用于带动所述承载座10旋转。The
通常镜筒44内设有镜片(图未示),所以本实施方式中的镜头模组40的光轴即为镜筒44的中心轴。所述光源装置20包括一光源22、一位置记录装置23及一支撑装置24。所述光源22为一激光。所述位置记录装置23与所述光源22相互毗邻设置。所述支撑装置24用于支撑所述光源22及位置记录装置23,以使光源22位于镜头模组40的一端并与所述镜头模组40的光轴偏离一定距离,且使光源22所发出的光线平行于镜筒44的中心轴。该位置记录装置23用于记录由所述光源22射出并经待检测镜头模组40反射后投射在记录装置23上的光线的光斑的位置。本实施方式中,所述光源22发射的光束刚好照射在镜筒44与音圈马达42的可动筒420之间的间隙内。所述位置记录装置23可以为一光敏感元件,如电荷耦合器件(Charge CoupledDevice,CCD)等。Generally, lenses (not shown) are disposed in the
所述分析装置30通过一线缆35与位置记录装置23电性连接。本实施方式中,所述分析装置30为一电脑。The analyzing
使用时,将所述光源22所对应的在位置记录装置23上的位置座标设为参考原点O记录在所述位置记录装置23内。所述光源22发出激光束,并照射在镜筒44与音圈马达42的可动筒420之间的间隙后,激光束经过镜筒44的外侧壁反射至位置记录装置23,并在该记录装置23上形成一光斑点O1。所述位置记录装置23记录该光斑点O1位置,同时计算该光斑点O1与所述光源22发出光束的位置即参考原点O的距离。所述分析装置30内预设有一可以接受的预定范围,若该光斑点O1与参考原点O之间相对偏移的距离在可以接受的预定范围内,也即镜筒44与音圈马达42之间的倾角在一个可以接受的预定范围内时,则分析装置30显示此待检测的镜头模组40合格。当该光斑点O1与参考原点O之间的偏移距离大于预定值,也即镜筒44与音圈马达42之间的倾角超出可以接受的预定范围内时,则分析装置30显示此待检测的镜头模组40不合格。可以理解的是,所述误差允许范围可根据客户要求而设置。本实施方式中,所述误差允许范围为0-0.2毫米之间。When in use, the position coordinates corresponding to the
为了更精确地对该镜头模组40进行测量,使用者可进行多点检测。具体地,致动器14驱动承载座12,以使镜筒44环绕镜头模组40的光轴旋转,所述光源22不断地发出激光束,所述位置记录装置23记录各反射光斑点的位置。所述分析装置30分析与距离参考原点O最远的光斑点位置与参考原点O之间的相对偏移距离是否在误差允许范围内,若误差超过允许的范围,则分析装置30显示此待检测的镜头模组40不合格。否则,显示合格。In order to measure the
本技术领域的普通技术人员应当认识到,以上的实施方式仅是用来说明本发明,而并非用作为对本发明的限定,只要在本发明的实质精神范围之内,对以上实施例所作的适当改变和变化都落在本发明要求保护的范围之内。Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Alterations and variations are within the scope of the claimed invention.
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