CN102004390B - Lens module detection system and detection method thereof - Google Patents

Lens module detection system and detection method thereof Download PDF

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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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lens module
light source
recording device
lens
position recording
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CN102004390A (en
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庄信弘
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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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。

Figure 200910306235

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.

Figure 200910306235

Description

镜头模组检测系统及其检测方法Lens module detection system and detection method thereof

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 module detection system 100 according to an embodiment of the present invention, which is used to detect the tilt angle of the lens module 40 . The lens module 40 includes a voice coil motor 42 and a lens barrel 44 . The lens barrel 44 is sheathed in the movable barrel 420 of the voice coil motor 42 . The lens module inspection system 100 includes a carrying device 10 , a light source device 20 , and an analysis device 30 .

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 bearing device 10 includes a bearing base 12 and an actuator 14 for driving the bearing base 12 to rotate. The carrying base 10 defines a quadrangular receiving groove 120 for receiving the lens module 40 to be tested during testing. It can be understood that the shape of the receiving groove 120 is not limited to a square, and it should be determined according to the shape of the lens module to be tested. In this embodiment, the actuator 14 is a rotating motor, which is used to drive the bearing seat 10 to rotate.

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 lens barrel 44 , so the optical axis of the lens module 40 in this embodiment is the central axis of the lens barrel 44 . The light source device 20 includes a light source 22 , a position recording device 23 and a supporting device 24 . The light source 22 is a laser. The position recording device 23 and the light source 22 are arranged adjacent to each other. The supporting device 24 is used to support the light source 22 and the position recording device 23, so that the light source 22 is located at one end of the lens module 40 and deviates from the optical axis of the lens module 40 by a certain distance, and the light emitted by the light source 22 The light rays are parallel to the central axis of the lens barrel 44 . The position recording device 23 is used to record the position of the light spot of the light emitted by the light source 22 and reflected by the lens module 40 to be inspected and projected on the recording device 23 . In this embodiment, the light beam emitted by the light source 22 just irradiates in the gap between the lens barrel 44 and the movable barrel 420 of the voice coil motor 42 . The position recording device 23 can be a photosensitive element, such as a charge coupled device (Charge Coupled Device, CCD).

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 device 30 is electrically connected to the position recording device 23 via a cable 35 . In this embodiment, the analysis device 30 is a computer.

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 light source 22 on the position recording device 23 are set as the reference origin O and recorded in the position recording device 23 . The light source 22 emits a laser beam, and after irradiating the gap between the lens barrel 44 and the movable barrel 420 of the voice coil motor 42, the laser beam is reflected to the position recording device 23 through the outer wall of the lens barrel 44, and is recorded at the position recording device 23. A light spot O1 is formed on the device 23 . The position recording device 23 records the position of the light spot O1, and at the same time calculates the distance between the light spot O1 and the position of the light beam emitted by the light source 22, that is, the reference origin O. An acceptable predetermined range is preset in the analysis device 30. If the relative offset distance between the light spot O1 and the reference origin O is within the acceptable predetermined range, that is, the distance between the lens barrel 44 and the voice coil motor 42 When the inclination angle between them is within an acceptable predetermined range, the analysis device 30 indicates that the lens module 40 to be tested is qualified. When the offset distance between the light spot O1 and the reference origin O is greater than a predetermined value, that is, when the inclination angle between the lens barrel 44 and the voice coil motor 42 exceeds an acceptable predetermined range, the analysis device 30 displays the The lens module 40 is unqualified. It can be understood that the error tolerance range can be set according to customer requirements. In this embodiment, the allowable error range is between 0-0.2 mm.

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 lens module 40 more accurately, the user can perform multi-point detection. Specifically, the actuator 14 drives the bearing seat 12 so that the lens barrel 44 rotates around the optical axis of the lens module 40, the light source 22 continuously emits a laser beam, and the position recording device 23 records the position of each reflected light spot . The analysis device 30 analyzes whether the relative offset distance between the light spot position farthest from the reference origin O and the reference origin O is within the allowable range of error, and if the error exceeds the allowable range, the analysis device 30 displays the position to be detected. The lens module 40 is unqualified. Otherwise, pass is displayed.

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.

Claims (8)

1.一种镜头模组检测系统,该镜头模组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,该镜头模组检测系统包括:1. A lens module detection system, the lens module detection system is used to detect the angle of inclination between the lens barrel in the lens module and the movable barrel of the voice coil motor, the lens module detection system includes: 一光源装置包括一光源及一位置记录装置,该光源所对应的在该位置记录装置上的位置座标设为参考原点O并记录在该位置记录装置内,该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后,该发出的激光束经镜筒的外侧壁反射至该位置记录装置,并在该位置记录装置上形成光斑点O1,该位置记录装置记录该光斑点O1位置,同时计算该光斑点O1与该参考原点O之间的距离;A light source device includes a light source and a position recording device, the position coordinates corresponding to the light source on the position recording device are set as the reference origin O and recorded in the position recording device, the light source is used to emit a laser beam, and After irradiating 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 O1 on the position recording device. The recording device records the position of the light spot O1, and simultaneously calculates the distance between the light spot O1 and the reference origin O; 一分析装置用于分析该光斑点O1与该该参考原点O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 light spot O1 and the reference origin O is within an error tolerance range. 2.如权利要求1所述的镜头模组检测系统,其特征在于:所述光源装置进一步包括一支撑装置用于支撑所述光源及位置记录装置,以使光源位于镜头模组的一端并与所述镜头模组的光轴偏离一定距离,且使光源所发出的光线平行于镜筒的中心轴。2. The lens module inspection system according to claim 1, wherein the light source device further comprises a supporting device for supporting the light source and the position recording device, so that the light source is located at one end of the lens module and The optical axis of the lens module deviates a certain distance, and makes the light emitted by the light source parallel to the central axis of the lens barrel. 3.如权利要求1所述的镜头模组检测系统,其特征在于:所述位置记录装置为一光敏感元件。3. The lens module inspection system according to claim 1, wherein the position recording device is a photosensitive element. 4.如权利要求1所述的镜头模组检测系统,其特征在于:所述分析装置通过一线缆与所述位置记录装置电性连接。4. The lens module inspection system according to claim 1, wherein the analyzing device is electrically connected to the position recording device through a cable. 5.如权利要求1所述的镜头模组检测系统,其特征在于:还包括一承载装置,所述承载装置包括一承载座,所述承载座开设有一收容槽,该收容槽用于检测时收容所述镜头模组。5. The lens module inspection system according to claim 1, further comprising a carrying device, the carrying device includes a bearing base, and the bearing base is provided with a receiving groove, and the receiving groove is used for testing Contains the lens module. 6.如权利要求5所述的镜头模组检测系统,其特征在于:所述承载装置进一步包括一用于驱动该承载座旋转的致动器。6. The lens module inspection system according to claim 5, wherein the carrying device further comprises an actuator for driving the carrying seat to rotate. 7.如权利要求1所述的镜头模组检测系统,其特征在于:所述分析装置内预设有一预定范围,若该光斑点与光源发出光束的位置之间相对偏移的距离在该预定范围内,则所述分析装置分析所述镜头模组合格,否则,所述镜头模组不合格。7. The lens module inspection system according to claim 1, wherein a predetermined range is preset in the analysis device, if the relative offset distance between the light spot and the position of the light beam emitted by the light source is within the predetermined range Within the range, the analysis device analyzes the lens module as qualified, otherwise, the lens module is unqualified. 8.如权利要求1所述的镜头模组检测系统,其特征在于:所述光源与位置记录装置相互毗邻设置。8. The lens module inspection system according to claim 1, wherein the light source and the position recording device are arranged adjacent to each other.
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