CN1937715A - 成像器件、其制造方法以及其固定机构 - Google Patents

成像器件、其制造方法以及其固定机构 Download PDF

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CN1937715A
CN1937715A CNA2006100992040A CN200610099204A CN1937715A CN 1937715 A CN1937715 A CN 1937715A CN A2006100992040 A CNA2006100992040 A CN A2006100992040A CN 200610099204 A CN200610099204 A CN 200610099204A CN 1937715 A CN1937715 A CN 1937715A
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松下直久
饭田进
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Abstract

本发明公开了一种成像器件、该成像器件的制造方法和用于该制造的成像器件固定机构，所述成像器件包括：其上设置有成像元件的基座；在其内固定聚光透镜的柱形塑料透镜部件；和塑料筒部件，在所述塑料筒部件中所述透镜部件可以沿轴线方向上移动并且被设置在所述成像元件上方，其中所述筒部件和所述透镜部件通过激光焊接被固定在一起。

Description

成像器件、其制造方法以及其固定机构
本发明是中国专利申请200410088994.3的分案申请。
技术领域
本发明一般地涉及成像器件、其制造方法以及用于该制造的成像器件固定机构，该成像器件包括其上设置成像元件的基座、将聚光透镜固定在其内部的柱形塑料透镜部件、和塑料筒部件，在塑料筒部件中透镜部件可以沿轴线方向上移动并且被设置在成像元件上。
背景技术
随着数字设备被制造得在功能上更复杂而在尺寸上更小，图像记录功能的利用一直在增加。随之而来的是，小尺寸的相机部件(即成像器件)正越来越多地内置到该设备中。
作为这种成像器件，例如图9A和9B所示的一种配置。图9A是立体图，而图9B是分解立体图。在图9A和9B中，基座1设置有柱形塑料筒部件3。在筒部件3内和基座1上设置有CCD、C-MOS传感器或者其他成像器件7。筒部件4的内周形成有阴螺纹9。
筒部件3在其内部设置有塑料透镜部件11。透镜部件11在其内部设置有聚光透镜(未示出)，用于将来自目标的光聚光到成像器件7上。此外，透镜部件11在其底部外周上形成有能够与筒部件3的阴螺纹9相啮合的阳螺纹13。
为了装配这种配置的成像器件，首先将透镜部件11插入筒部件3内，然后转动透镜部件11以使透镜部件11在筒部件3的轴线方向上移动来调焦。在调焦后，使用粘合剂来粘接筒部件3和透镜部件11，以由此将聚光透镜固定到位。
此外，当通过透镜部件11之外的透镜进行调焦时，已经提出了以下的方法。例如，与图9A和9B不同，使用没有阴螺纹的金属筒部件3和没有阳螺纹的金属透镜部件11，将透镜部件11插入筒部件3中，并且通过填隙来将透镜部件11和筒部件3固定在一起(例如，参见图10和图11中的日本未审查专利公开(Kokai)No.5-181043)。
对于通过粘合剂来将透镜部件11和筒部件3固定在一起的方法，存在以下问题：
(1)粘合剂是在调焦工作之后涂覆的。于是为了完成固化，不得不允许器件承受高温环境或者紫外线环境达约数十分钟至数小时的时间。粘合剂的收缩导致透镜部件11和筒部件3之间的相对位置发生偏离，因此焦点最终变偏。
(2)从形成部件时开始的留在透镜部件11或者筒部件3中的残余应力的释放(退火效果)，导致整个部件的变形和图像的失真。
(3)当获得的图像很差时，一旦将透镜部件11从筒部件3拆卸下来，作为一种维修方法，再次进行调焦，然后粘接这些部件。利用此方法，在从筒部件3拆卸透镜部件11(以下称为“返修”)后，材料不同于基座材料的粘合剂有时会余留在透镜部件11或者筒部件3的表面上，这在重新粘接时导致很差的粘接。
下面，对于通过填隙来将透镜部件11和筒部件3固定在一起的方法，存在以下问题：
(1)在填隙时有很大的力作用在透镜上，使得透镜变形或者被损坏。
(2)需要单独的透镜来调焦，因此成本变高。
发明内容
本发明的第一目的是提供一种给出良好图像的成像器件、该成像器件的制造方法和该成像器件的固定机构。
本发明的第二目的是提供一种能够在短时间内被制造的成像器件、该成像器件的制造方法和该成像器件的固定机构。
本发明的第三目的是提供一种即使返修也能够可靠装配的成像器件、该成像器件的制造方法和该成像器件的固定机构。
根据本发明的第一方面，提供了一种成像器件，包括：其上设置有成像元件的基座；在其内固定聚光透镜的柱形塑料透镜部件；和塑料筒部件，在所述塑料筒部件中所述透镜部件可以沿轴线方向上移动并且被设置在所述成像元件上方，其中所述筒部件和所述透镜部件通过激光焊接被固定在一起。
根据本发明的第二方面，提供了一种成像器件的制造方法，所述成像器件包括其上设置有成像元件的基座、在其内固定聚光透镜的柱形塑料透镜部件、和塑料筒部件，在所述塑料筒部件中所述透镜部件可以沿轴线方向上移动并且被设置在所述成像元件上方，所述制造方法包括以下步骤：在所述筒部件的所述轴线方向上移动所述透镜部件来调焦；和在所述调焦步骤后在一个点处使用激光将所述筒部件和所述透镜部件焊接在一起。
根据本发明的第三方面，成像器件的制造方法还包括，在使用激光将所述筒部件和所述透镜部件焊接在一起的步骤时，根据所述激光命中部分的温度停止发射所述激光。
根据本发明的第四方面，提供了一种在制造成像器件时使用的成像器件固定机构，所述成像器件包括其上设置有成像元件的基座、在其内固定聚光透镜的柱形塑料透镜部件、和塑料筒部件，在所述塑料筒部件中所述透镜部件可以沿轴线方向上移动并且被设置在所述成像元件上方，所述筒部件和所述透镜部件使用激光器被焊接在一起，所述成像器件固定部件包括紧靠所述筒部件的周边并且夹紧所述筒部件的第一夹具和第二夹具；所述第一夹具和第二夹具中在所述激光焊接位置侧的夹具具有比另一个夹具更好的导热性并且与所述筒部件的周边是面接触。
根据本发明的上述方面，因为筒部件和透镜部件通过激光焊接被固定在一起，所以可以使用激光束的高峰值功率特性并且以激光命中部分周围区域的微小变形来连接部件，透镜部件和筒部件存在微小变形，并可以获得不失真的良好图像。
此外，因为使用激光进行焊接，可以在短时间内完成装配。此外，因为焊接单个点，所以在返修时可以容易地拆卸返修部件。此外，因为在返修时焊接部分处不会插入与基座材料不同的材料，因此可以得到可靠的装配。
根据本发明的成像器件的制造方法，因为透镜部件在筒部件的轴线方向上被移动来调焦，然后筒部件和透镜部件通过激光在一个点处被焊接，所以可以总是获得稳定的图像。
根据本发明的成像器件的制造方法，因为在使用激光将所述筒部件和所述透镜部件焊接在一起的步骤时，根据所述激光命中部分的温度停止发射所述激光，所以可以防止筒部件和透镜部件被炭化或者材料发生其他变化。
根据本发明的成像器件固定机构，因为第一夹具和第二夹具是由使用激光器焊接起来、紧靠筒部件的周边并且夹紧筒部件的第一夹具和第二夹具构成的，并且因为所述第一夹具和第二夹具中在所述激光焊接位置侧的夹具与所述筒部件的周边是面接触，所以焊接产生的热快速地传导到在所述激光焊接位置侧的夹具，因此可以防止筒部件和透镜部件由于过分焊接发生变形，并可以获得良好的图像。
附图说明
从以下参照附图的对优选实施例的说明，本发明的这些和其他目的与特征将变得更清楚，附图中：
图1A和1B是根据本发明实施例的成像器件的视图，其中图1A是立体图而图1B是分解立体图；
图2是沿着图1A的线A-A的剖视图；
图3是制造系统的整体配置的视图；
图4是图3的成像器件固定机构的放大视图；
图5是图3的激光发射机构的放大视图；
图6是用于解释图3的制造系统的电气配置的框图；
图7是制造流程的视图；
图8是用于解释另一个实施例的视图；
图9A和9B是用于解释相关技术的成像器件的视图；
图10是显示日本未审查专利公开(Kokai)No.5-181043的图2的视图；
图11是显示日本未审查专利公开(Kokai)No.5-181043的图3的视图。
具体实施方式
下面将参照附图详细说明本发明的优选实施例。
(成像器件)
首先，将解释本实施例的成像器件50。图1A和1B是本实施例的成像器件的视图，其中图1A是立体图而图1B是分解立体图，并且图2是该配置沿着图1A的线A-A的剖视图。
在这些图中，基座51设置有柱形塑料筒部件53。在筒部件53中和基座51上设置有CCD、C-MOS传感器或者其他成像器件57。筒部件53的内周形成有阴螺纹58。
筒部件53在其内设置有塑料透镜部件61。透镜部件61在其内设置有聚光透镜59，用于将来自目标的光聚光到成像器件57上。此外，透镜部件61在其底部外周上形成有能够与筒部件53的阴螺纹58相啮合的阳螺纹63。
在此配置的成像器件50中，首先将透镜部件61插入到筒部件53中，并且转动透镜部件61以使透镜部件61沿着筒部件53的轴线方向上移动来调焦。
筒部件53和透镜部件61通过激光焊接而被固定在一起。在筒部件53和透镜部件61之间的边界处，通过聚光在单个点处形成焊点65。
(制造系统)
下面，将解释图1A和1B以及图2示出配置的成像器件的制造方法。首先，将使用图3至图5来解释在制造时所使用的系统。图3是制造系统的整体配置的视图；图4是图3的固定机构的成像器件的放大视图；而图5是图3的激光发射机构的放大视图。
在图3中，公共基座101设置有成像器件固定机构103、调焦机构105和激光发射机构107。此外，在成像器件固定机构103的上方设置板109，在板109底表面上具有用于调焦的测试图案。
下面将利用图4来解释成像器件固定机构103。成像器件固定机构103具有第一夹具111和第二夹具113，用于紧靠成像器件50的筒部件53的周边并且将筒部件53夹紧。在此实施例中，第一夹具111固定在适当位置，而可以由汽缸115使得第二夹具113接近或者离开第一夹具111。第一夹具111形成有弧形槽111a，其允许与成像器件50的筒部件53的周边进行面接触，而第二夹具113形成有基本上成V形的槽，其允许与成像器件50的筒部件53的周边进行两点接触。此外，在此实施例中，第一夹具111和第二夹具113由导热性良好的铝制成。此外，第一夹具111设置有温度传感器117，用于在焊接时测量激光命中部分附近的温度(筒部件53外周的温度)。
下面将利用图5解释激光发射机构107。由激光振荡器121产生的激光束从发射单元123发射。发射单元123被设置成能够在垂直方向上设置的子基座125上移动。此外，子基座125被设计成能够通过图3所示的汽缸127而接近或者离开成像器件固定机构103。
下面，返回图3，将解释调焦机构105。调焦机构105具有夹具131，夹具131能够与成像器件50的透镜部件61啮合并且能够在啮合时转动透镜部件61。此夹具131被设计成能够通过汽缸133接近或者离开被成像器件固定机构103固定的成像器件50。
下面将利用图6解释制造系统的电气配置。在图中，标号151是控制器，其用于获取温度传感器117的温度信息，从成像器件50的成像元件57获取图像数据，并且控制激光发射机构107、调焦机构105和成像器件固定机构103的操作。控制器151设置在图3和图5所示的控制单元153的内部。
下面将利用示出制造流程的图7解释装配处理。首先，通过成像器件固定机构103的第一夹具111和第二夹具113夹紧并设置包括基座51、成像元件57和筒部件53的组件(步骤S1)。此时，控制器151可以从成像元件57的电极获取板109上测试图案的图像数据。
接着，将透镜部件61设置在成像器件固定机构103的夹具131中，其中透镜部件61与聚光透镜59装配在一起。当设置透镜部件61时，控制器151驱动调焦机构105的汽缸133以将夹具131移动到被设置在成像器件固定机构103处的基座51、成像元件57和筒部件53的组件(图2)上方(步骤S2)。
接着，控制器151使调焦机构105的夹具131转动，以将透镜部件161拧进筒部件53中并且在筒部件53的轴线方向上移动透镜部件61(步骤S3)。控制器151在观察来自成像元件57的测试图案的图像数据的同时进行调焦(步骤S4)。控制器151驱动激光发射机构107的汽缸127以将激光发射机构107的发射单元123移动到由成像器件固定机构103固定的成像器件50上方，并且在筒部件53和透镜部件61之间边界处的某一点发射激光以将两者(53，61)固定在一起(步骤S5)。此外，在步骤S5，控制器通过温度传感器117监控在焊接时被激光命中部分附近的温度，并且在温度达到设定温度或更高温度时停止发射激光。此外，在此实施例中，在第一夹具111侧发射激光。
接着，控制器151从来自成像元件57的测试图案的图像数据查看焦点偏离与否(步骤S6)。当焦点偏离时，该器件有缺陷，因此将筒部件53从透镜部件61拆卸(步骤S9)并且例程返回到步骤S1。
当在步骤S6发现器件没有缺陷时，如果将被制造的成像器件50不是要求气密密封的规格或者要求强粘接力的规格中的一种(步骤S7)，则组件完成。如果将被制造的成像器件50是要求气密密封的规格或者要求强粘接力的规格中的一种，控制器151驱动激光发射机构107以在多个点处通过激光焊接筒部件53和透镜部件61之间的边界(步骤S8)，来完成该组件。同样在步骤S8处，控制器151通过温度传感器117监控在焊接时被激光命中部分附近的温度，并且在温度达到设定温度或更高温度时停止发射激光。
根据本实施例，可以获得以下效果：
(1)因为筒部件53和透镜部件61通过激光焊接被固定在一起，所以可以使用激光束的高峰值功率特性并且以激光命中部分周围区域的微小变形来连接部件，透镜部件61和筒部件53存在微小变形，并可以获得不失真的良好图像。
(2)因为使用激光进行焊接，可以在短时间内完成装配。
(3)因为使用激光进行焊接，在返修时焊接部分处不会插入与基座材料不同的材料，因此可以得到可靠的装配。
(4)因为在使用激光进行焊接的步骤时，根据激光命中部分的温度停止发射激光，所以可以防止筒部件53和透镜部件61被炭化或者材料发生其他变化。
(5)因为第一夹具111和第二夹具113是用具有良好导热性的铝制成的，所以焊接产生的热快速地传导到夹具，因此可以防止筒部件53和透镜部件61由于过分焊接发生变形，并可以获得良好的图像。
(6)因为第一夹具111与筒部件53的周边进行面接触，所以焊接产生的热在激光焊接位置侧传导到夹具，因此可以防止筒部件53和透镜部件61由于过分焊接发生变形，并可以获得良好的图像。
(7)因为温度传感器117监控在焊接时被激光命中部分附近的温度，并且在温度达到设定温度或更高温度时，停止发射激光，所以可以防止筒部件53和透镜部件61被炭化或者材料发生其他变化。
此外，本发明不限于上述实施例。在上述实施例中，设置在第一夹具111处的温度传感器117被设计成检测被激光命中部分附近的温度(筒部件53的周边温度)，但如图8所示，如果使用仅反射特定波长区域的光并且通过其余波长区域的光的二色镜215，温度传感器217也可以检测焊接部分的温度。标号213是用于聚光激光束的透镜。
虽然已经参照为举例说明目的而选择的特定实施例说明了本发明，但应当清楚，本领域技术人员可以做出大量修改而不会偏离本发明的基本原理和范围。

Claims (6)

1.一种成像器件，包括：
其上设置有成像元件的基座；
在其内固定聚光透镜的柱形塑料透镜部件；和
塑料筒部件，在所述塑料筒部件中所述透镜部件可以沿轴线方向上移动并且被设置在所述成像元件上方，其中
所述筒部件和所述透镜部件通过激光焊接在单点处被固定在一起。
2.一种用于生产成像器件的器件，所述成像器件包括成像元件和保持透镜的透镜部件，该器件包括：
调焦装置，用于所述透镜相对于所述成像元件的调焦；
激光源，用于发射用于焊接所述透镜部件的激光；和
控制器，用于控制所述调焦装置和所述激光源，当确定所述透镜部件相对于所述成像元件对焦时，所述控制器控制所述激光源发射激光。
3.根据权利要求2所述的用于生产成像器件的器件，其中所述调焦装置包括夹具，该夹具用于夹持所述透镜部件并调节所述透镜和所述成像元件之间的相对位置。
4.根据权利要求2或3所述的用于生产成像器件的器件，其中所述器件还包括：
测试图案，由所述成像元件捕获；和
所述控制器从所述成像元件接收所述测试图案的图像，并确定所述透镜是否对焦在所述测试图案上。
5.一种用于生产成像器件的器件，所述成像器件包括成像元件和保持透镜的透镜部件，该器件包括：
激光源，用于朝向所述透镜部件发射用于焊接所述透镜部件的激光；和
温度传感器，用于检测所述激光发射的点的温度；和
控制器，用于控制所述激光源，当确定由所述温度传感器检测的温度达到预定温度时，所述激光源停止发射激光。
6.一种用于生产成像器件的器件，所述成像器件包括筒部件和保持透镜的透镜部件，该器件通过焊接所述筒部件和所述透镜部件而生产所述成像器件，该部件包括：
激光源，用于朝向所述筒部件和所述激光部件发射激光；
控制器，用于控制所述激光源；和
第一夹具和第二夹具，用于夹持所述筒部件；
所述第一夹具和所述第二夹具中至少一个在激光被发射的所述筒部件的一侧具有以面接触的方式抵靠所述筒部件的周边的形状，并且由高导热性材料形成。
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CN101332671A (zh) 2008-12-31
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