CN1535790A - 电子掩蔽激光成像系统 - Google Patents

电子掩蔽激光成像系统 Download PDF

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CN1535790A
CN1535790A CNA2004100309539A CN200410030953A CN1535790A CN 1535790 A CN1535790 A CN 1535790A CN A2004100309539 A CNA2004100309539 A CN A2004100309539A CN 200410030953 A CN200410030953 A CN 200410030953A CN 1535790 A CN1535790 A CN 1535790A
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大卫A·格雷威尔
C���帥��
唐纳德C·洛弗特
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    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
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Abstract

一种具有一个输出激光束的激光源和一个电子显示设备的激光成像装置。电子显示设备设置在激光源下游的位置。电子显示设备可以操作以选择性地偏振激光束的一个离散部分，以确定一个修改部分和一个未修改部分。然后，将一个偏振滤光器设置在显示设备的下游位置，以便防止激光束的修改部分或未修改部分穿过，从而确定一个具有特定图形的成像光束。

Description

电子掩蔽激光成像系统
技术领域
本发明涉及激光成像，更具体地讲，涉及一种用于产生可变形状成像图形的改进的装置。
背景技术
激光焊接通常用于在焊接区接合塑料或诸如热塑性部件之类的树脂部件。在美国专利号为4,636,609的专利中可以看到激光器这种用途的例子，此专利明确地结合在此作为参考。
众所周知，激光器提供特定频率的电磁辐射(即，相干单频辐射)的聚焦光束。现有的激光器有很多种类型；然而，红外激光器或非相干激光源提供了用于加热焊接区的比较经济的辐射能源。透射红外(Through-Transmission Infrared(TTIr))焊接被认为是红外焊接的一个特殊例子。TTIr焊接使用一种能够产生由光纤、波导或光导引导穿过第一塑料部件进入第二塑料部件的红外辐射的红外激光器。由于第一塑料部件允许来自激光器的激光束穿过，因而通常称之为透射件。然而，由于第二塑料部件主要吸收激光束的辐射能以在焊接区中产生热，因而通常将此件称为吸收件。焊接区中的热造成透射件和和吸收件熔化，并且通过紧密接触焊接在一起。
经常希望产生加热图形和/或各种不同形状的焊缝。这可以利用金属掩模完成。掩模通常是经过机加工、蚀刻、激光切割的金属片，或用其它方式修改以便仅允许特定形状的辐射能穿过、而其余辐射能被反射或吸收的金属片。这些金属掩模的制造通常是费工、缓慢、且昂贵的。此外，这些金属掩模不容易修改，从而限制了它们的应用。
金属掩模还限制了可能产生的加热图形和/或焊缝的范围。也就是说，在一些场合，金属掩模的物理局限性使得需要用外部支撑保持任何未装接在原始材料片上的掩蔽部分。与模板印刷类似，字母O需要经过桥构件或利用分离的玻璃片将中心部分连接到外部部分，以便保持其适当的对准。很容易理解，这些物理局限性使得许多形状不能用激光焊接。
因此，相关技术中存在对能够迅速和方便地确定激光焊接中使用的掩模的装置的需求。此外，在相关技术中存在对能够容易地进行修改的掩蔽装置的需求。再此外，在相关技术中存在对无需可能干扰所产生的焊接图形的外部支撑就能够产生复杂形状的掩蔽装置的需求。最后，相关技术中存在对能够克服现有技术的缺陷的掩蔽装置的需求。
发明内容
根据本发明的原理，提供了一种具有有利的构造的激光成像装置和使用这种激光成像装置的方法。激光成像装置包括一个输出激光束的激光源和一个电子显示设备。电子显示设备设置在激光源下游的位置，并且可以操作以选择性地偏振激光束的一个离散部分，从而确定了一个修改部分和一个未修改部分。然后，将一个偏振滤光器设置在显示设备的下游，以便防止激光束的修改部分或未修改部分透过，从而确定了一个具有特定图形的成像激光束。
从下文的详细说明中可以了解到本发明的更多适用方面。应当知道，详细的说明和特定示例尽管指出了本发明的优选实施例，但仅仅是为了举例说明的目的，而不是要限制本发明的范围。
附图说明
通过详细的说明和附图，可以对本发明有更充分的理解，其中：
图1是示出根据本发明的原理的、包括可选装备的电子掩蔽激光成像系统的示意图；
图2是根据本发明的第一实施例的、与偏振激光束一同使用的电子掩蔽系统的示意透视图，为了清楚，略去了一些部分；和
图3是根据本发明的第二实施例的、与未偏振激光束一同使用的电子掩蔽系统的示意透视图，为了清楚，略去了一些部分。
具体实施方式
以下的优选实施例的说明实质上仅为了举例说明，而不是要以任何方式限制本发明、其应用或使用。此外，应当知道，尽管本发明是结合TTIr焊接说明的，但是本发明同样可以应用于其它焊接形式和/或利用光能的表面加热。另外，本发明可以在与焊接无关的可变成像应用中广泛使用，例如，在通常用于形成IC芯片、微电子机械系统(MEMS)、微型设备等的光刻中应用。因此，不应当将本发明看成是仅限于以下说明的特定焊接应用。
参考附图，示出了一个根据本发明的原理的电子掩蔽系统10。根据本实施例，电子掩蔽系统10适合于与TTIr焊接系统12一同使用。如图1中所示，TTIr焊接系统12可包括一个由大致排列成环形的多个光纤构成的、能够携带或传输激光束形式的辐射能的可选光纤束14。根据已知的原理，光纤束14可操作地连接到诸如红外激光器之类的激光源18。可选地，TTIr焊接系统12可包括一个由硅树脂片、聚碳酸酯片或玻璃片构成的光导构件。也可以使用一个可选透镜组件20将辐射能处理成预定的轮廓。也就是说，透镜组件20可用来利用光学原理，在电子掩蔽系统10的上游或下游集中或分布激光能。
在操作中，激光源18输出由光纤束14携带的激光束。激光束穿过透镜组件20并且在参考号22处从透镜组件20射出。然后，激光束进入电子掩蔽系统10，并且受到控制以产生预定的掩蔽图形24，这将在下文详细论述。然后，受电子掩蔽系统10操纵的激光束作为预定的掩蔽图形24离开电子掩蔽系统10，并且从称为透射件的第一塑料部件26穿过。透射件26一般允许激光束穿过，而没有明显的吸收或反射。然后，激光束被称为吸收件的第二塑料部件28吸收。吸收件28一般吸收激光束的辐射能，以在焊接区30中产生热。这种热造成透射件26和吸收件28在焊接区30熔化，并且在冷却时焊接在一起。应当知道，电子掩蔽系统10也可以设置在激光源10和可选透镜组件20之间的位置，或可选地，电子掩蔽系统10的各种不同零件可设置在可选透镜组件20的相反两侧。
通过特别参考图2和3，说明与可选激光源有关的电子掩蔽系统10。更确切地说，图2示出了与偏振激光源18’结合使用的电子掩蔽系统10’。通过限定，偏振激光源18’输出偏振的激光束，在偏振激光束中光能的振动存在于单一平面中。在这方面，偏振激光束穿过可选透镜组件20(本图中未示出)，并且作为偏振激光束22’射出。应当注意，在本实施例中，必须取消可选光纤束14，以便保证偏振激光束保持偏振，而不需要进一步处理，即，众所周知，如果通过光纤束传播偏振激光束，那么由于光纤束的物理特性，偏振激光束在离开光纤束时将成为“非偏振”激光束。
仍然参考图2，电子掩蔽系统10’包括一个液晶显示器(LCD)32，和一个相对于偏振激光束22’的传送方向、设置在LCD 32“下游”位置的偏振滤光器34。LCD 32可以是任意能够改变偏振激光束22’的偏振状态的常规设计的液晶显示器。也就是说，LCD 32可以是任意能够相对于偏振激光束22’的原始方向，将偏振激光束22’中选定的部分偏振90°(或其它希望的任意角度)的常规设计的液晶显示器。优选地，偏振滤光器34是PROFLUX的MICROWIRESTM偏振器。在操作中，经过控制器36使LCD 32的选定部分38获得能量或受到激励，这样，选定部分38偏振激光束22’。在这方面，穿过LCD 32的选定部分的激光束22’的振动平面(用参考号40一般指示)相对于原始振动平面旋转了90°。仍然参考图2，激光束22’的未修改部分仅仅是穿过LCD 32，并保持它们的原始振动平面(用参考号42一般指示)。
然后，激光束22’的修改部分40和未修改部分42碰到偏振滤光器34。然后，偏振滤光器34吸收、反射、或用其它方式防止激光束22’的任何振动平面与偏振滤光器34允许的振动平面不同的部分通过。换言之，设置偏振滤光器34以便仅允许激光束22’的选定部分通过。因此，在本示例中，可以允许激光束22’的修改部分40通过偏振滤光器34，而未修改部分42被吸收、反射，或以其它方式被禁止通过。应当知道，可以改变偏振滤光器34的方向，从而产生“负像”，在偏振滤光器34中只允许激光束22’的未修改部分通过偏振滤光器34，而将修改部分40吸收、反射，或以其它方式防止其通过。实际上，修改激光束22’的选定部分的振动平面的处理仅允许激光束22’的离散区通过偏振滤光器34，并且作用在焊接区30。由于LCD 32的可管理性，所以这些离散区几乎可以被构造以表现任何二维形状。
现在转到图3，提供了一个与未偏振激光源18”结合使用的电子掩蔽系统10”。通过限定，未偏振激光源18”输出未偏振激光束，在未偏振激光束中光能的振动存在于多个平面中。在这方面，偏振激光束穿过可选透镜组件20(本图中未示出)，并且作为未偏振激光束50射出。
仍然参考图3，电子掩蔽系统10”包括一个液晶显示器(LCD)32、一个相对于未偏振激光束50的传送方向设置在LCD 32“下游”位置的偏振滤光器34和一个设置在LCD 32“上游”位置的偏振滤光器52。在这种布置中，未偏振激光束50入射到上游的偏振滤光器52。上游偏振滤光器52偏振未偏振激光束50，从而使未偏振激光束50在离开上游偏振激光器52时成为偏振激光束22’(具有单一振动平面)。一旦未偏振激光束50转换为偏振激光束22’，LCD 32和下游偏振滤光器34发挥上述功能，以提供掩蔽图形24。为了简洁，不再进一步论述LCD 32和下游偏振滤光器34的这种操作。
现在转到控制器36和LCD 32的操作，假设控制器36是一个诸如台式计算机之类的具有PWOERPOINT，PHOTOSHOP，PAINTSHOPPRO，VISIO，AUTOCAD之类图像生成软件的计算机。然而，控制器36可以是一个仅能够存取存储的图像和在LCD 32上显示所述存储的图像的计算机。为此，可以快速和方便地生成、修改、存储、打开多个焊接设计中的任意一个，以便允许改变掩蔽图形24。然后，从控制器36经过线路54将这些设计输出到LCD 32，并且“显示”在LCD 32上。选定图形的“显示”造成偏振激光束22’中对应的选定部分相对于其原始方向偏振90°，因此，在偏振激光束22’穿过偏振滤光器34之后确定了掩蔽图形24。根据本发明的原理，控制器36和LCD 32掩蔽图形24可被构造以便确定多个二维或三维图像中的任何一个。与常规的金属掩蔽技术不同，本发明允许掩蔽图形24包括“未支撑的”特征，例如字母a，b，d，g，o，p和q的中心部分。在惯例上，这些中心部分需要小的支撑臂将它们连接到金属掩模的主体部分，这和模板印刷类似。然而，本发明使得可以不需要任何支撑臂而形成这些中心部分。
本发明的说明实质上仅是举例说明，因此，不脱离本发明要旨的各种改变包括在本发明的范围内。不认为这些改变偏离了本发明的精神和范围。

Claims (18)

1、一种将第一部件激光焊接到第二部件的方法，所述方法包括：
输出激光束；
使所述激光束穿过一个液晶显示器，所述液晶显示器确定了一个预定图形，所述预定图形造成所述激光束的一个离散部分偏振，以确定所述激光束的修改部分和所述激光束的未修改部分；
使所述激光束的所述修改部分和所述未修改部分暴露于一个下游偏振滤光器，从而仅使所述激光束的所述修改部分和所述未修改部分中的一个穿过，以确定一个形状与所述预定图形基本上相同的焊束；和
用所述焊束加热第一部件和第二部件中的至少一个，以在它们之间建立焊接。
2、根据权利要求1所述的方法，其中所述激光束是偏振激光束。
3、根据权利要求1所述的方法，其中所述激光束是未偏振激光束，进一步包括：
使所述未偏振激光束暴露于设置在所述液晶显示器上游位置的上游偏振滤光器，所述上游偏振滤光器偏振所述未偏振激光束。
4、根据权利要求1所述的方法，进一步包括：
将控制器连接到所述液晶显示器，所述控制器向所述液晶显示器输出信号，以确定所述预定图形。
5、一种激光焊接装置，包括：
一个输出激光束的激光源；和
一个设置在所述激光源下游位置的电子掩蔽系统，所述电子掩蔽系统可以操作以选择性地偏振所述激光束的离散部分，以确定具有预定图形的焊束。
6、根据权利要求5所述的激光焊接装置，其中所述电子掩蔽系统包括：
一个输出信号的控制器；
一个连接到所述控制器的液晶显示器，所述液晶显示器可以操作以响应所述信号在其上确定一个预定图形，所述液晶显示器偏振所述激光束的一部分，以确定一个修改部分和一个未修改部分；和
一个设置在所述液晶显示器下游位置的第一偏振滤光器，所述第一偏振滤光器可以操作以防止所述激光束的所述修改部分和所述未修改部分中的一个穿过。
7、根据权利要求6所述的激光焊接装置，进一步包括：
一个设置在所述液晶显示器上游位置的第二偏振滤光器，所述第二偏振滤光器可以操作以偏振所述激光束。
8、根据权利要求5所述的激光焊接装置，进一步包括：
一个在所述激光源和所述电子掩蔽系统之间连接的光纤，所述光纤将所述激光束传输至所述电子掩蔽系统。
9、根据权利要求5所述的激光焊接装置，进一步包括：
一个连接邻近的所述电子掩蔽系统的透镜组件。
10、一种激光焊接装置，包括：
一个输出激光束的激光源；
一个设置在所述激光源的下游位置的显示设备，所述显示设备可以操作以选择性地偏振所述激光束的一个离散部分，以确定一个修改部分和一个未修改部分；和
一个设置在所述显示设备的下游位置的第一偏振滤光器，所述第一偏振滤光器可以操作以防止所述激光束的所述修改部分和所述未修改部分中的一个穿过，以确定一个焊束。
11、根据权利要求10所述的激光焊接装置，进一步包括：
一个设置在所述显示设备的上游位置的第二偏振滤光器，所述第二偏振滤光器可以操作以偏振所述激光束。
12、根据权利要求10所述的激光焊接装置，其中所述显示设备是液晶显示器。
13、根据权利要求10所述的激光焊接装置，进一步包括：
一个在所述激光源和所述电子掩蔽系统之间连接的光纤，所述光纤将所述激光束传输至所述电子掩蔽系统。
14、根据权利要求10所述的激光焊接装置，进一步包括：
一个连接邻近的所述电子掩蔽系统的透镜组件。
15、一种激光成像方法，包括：
输出一个激光束；
使所述激光束穿过一个液晶显示器，所述液晶显示器确定一个预定的图形，所述预定图形造成所述激光束的一个离散部分偏振，以确定所述激光束的修改部分和所述激光束的未修改部分；和
使所述激光束的所述修改部分和所述未修改部分暴露于一个下游偏振滤光器，从而仅使所述激光束的所述修改部分和所述未修改部分中的一个穿过，以确定一个形状与所述预定图形基本上相同的成像光束。
16、根据权利要求15所述的方法，其中所述激光束是偏振激光束。
17、根据权利要求15所述的方法，其中所述激光束是未偏振激光束，进一步包括：
将所述未偏振激光束暴露于设置在所述液晶显示器上游位置的上游偏振滤光器，所述上游偏振滤光器偏振所述未偏振激光束。
18、根据权利要求15所述的方法，进一步包括：
将一个控制器连接到所述液晶显示器，所述控制器向所述液晶显示器输出信号，以确定所述预定图形。
CNA2004100309539A 2003-04-08 2004-04-01 电子掩蔽激光成像系统 Pending CN1535790A (zh)

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