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标题: 结构光源 [打印本页]
作者: benjamin.zhu 时间: 2008-12-12 14:18
标题: 结构光源
什么是结构光源？
结构光就是把一个具有一定样式的光（面状、网状、或者其它复杂的形式）按照已知的角度照射到一个物体上。这种技术对于图像采集并获取
空间信息是十分有用的。最常用的光源样式就是把一个激光束扩散成一条直线，当这条激光线被投射到一个物体上时，我们会在该物体的表面
看到一条明亮的激光线。通过在一定的角度观察这条线，我们所获得的激光线的扭曲图像可以被转化为该物体的高度起伏信息。
获取2-D空间信息
扫描并分析含有物体3-D信息的激光束—3D机器视觉的最基础理论。这种情况看来，结构光源有时被理解为“主动式三角测量”。由于结构光照
明可以被用在机器视觉领域来获取目标物体的形状信息，它可以在特定环境在帮助机器识别并定位一个物体。这些特点使得结构光照明在生产
线方面的过程和质量控制领域表现得尤其有用。通常人们用结构光来做标线以及工业检测的事情。结构光系统可以彻底改变一条生产线的现状
：减少过程的误差、缩短生产时间、实现生产线的机械化、提高生产工艺、降低生产成本。尽管其它类型的光源也可以被用来用做结构光，但
是如果考虑精度和可靠性的话，激光光源无疑是最好的选择。
结构光的应用
StockerYale公司的 Lasiris? 均匀光强激光发生器在结构光应用方面显得尤其有用，其中包括机器视觉、工业检测、标定 等。
机器视觉系统包括结构光源、工业相机、以及一台计算机来精确地获取和分析数据。例如被作为3-D导航系统使用在机器人身上，这样可使使得
机器人有能力来更换或者安装一台汽车上的某个部件。
结构光激光器也可以被用在精密部件生产线的检测领域，当某个部件不符合特定的标准的时候该系统就会报警。它们可以在食物生产线上挑出
有斑点的蔬菜也可以在药品生产线上确保正确颜色的药丸被装进了合适的瓶子当中。
另外的激光应用就是标定。在电脑装配领域，一个激光系统可以帮助操作员确定电脑芯片是否准确地安装到了一个电脑主板上面。
Lasiris?激光器也可以很好地用于物件轮廓检测、表面缺陷检测、深度测量、引导线、边缘检测等方面。StockerYale公司拥有库存的标准产品
来适应各种方面的应用，同时激光器也可以为OEM定制来适应其特殊应用。
作者: benjamin.zhu 时间: 2008-12-12 14:20
标题: What is Structured Light?
Structured light is the projection of a light pattern (plane, grid, or more complex shape) at a known angle onto an object. This technique can be very useful for imaging and acquiring dimensional information. The most often used light pattern is generated by fanning out a light beam into a sheet-of-light. When a sheet-of-light intersects with an object, a bright line of light can be seen on the surface of the object. By viewing this line of light from an angle, the observed distortions in the line can be translated into height variations.
Acquiring 2-dimensional information Scanning the object with the light constructs 3-D information about the shape of the object. This is the basic principle behind depth perception for machines, or 3D machine vision. In this case, structured lighting is sometimes described as active triangulation.
Since structured lighting can be used to determine the shape of an object in machine vision applications, it can also help recognize and locate an object in an environment. These features make structured lighting useful in assembly lines implementing process control or quality control. These methods use structured lighting for alignment and inspection purposes. Structured light systems can drastically transform a manufacturing plant by decreasing process variation, reducing production time, allowing automation of assembly lines, increasing precision, and generally decreasing overall cost. Although other types of light can be used for structured lighting, laser light is the best choice when precision and reliability are important.
Structured Light ApplicationsStockerYale's Lasiris™ uniform intensity laser projectors are especially useful for structured light applications, including Machine Vision, Inspection, and Alignment.
Machine vision is a combination of structured lighting, a detector, and a computer to precisely gather and analyze data. For example, it is used on robots as 3-D guiding systems to place or insert a part on a car, such as a windshield wiper or a door.
Structured light lasers used in inspection minimize process variation by drawing attention to parts that do not conform to specifications. They can pick out vegetables with blemishes from food processor lines or can ensure that the right colored capsule goes in the correct bottle in drug packaging lines.
Another laser application is alignment. In computer assembly, a laser system can help an operator determine if a computer chip is perfectly positioned on a circuit board.
Lasiris™ lasers can be useful for contour mapping of parts, surface defect detection, depth measurements, guidelines, edge detection, and alignment. StockerYale has standard laser configurations available off-the-shelf for a wide variety of applications, but lasers can also be custom manufactured for OEM clients, designed for specific applications.
Companies that are interested in integrating laser technology for machine vision and industrial inspection into the manufacturing process should involve our engineers at the design stage.
作者: benjamin.zhu 时间: 2008-12-12 14:24
标题: 美国StockerYale结构光激光器
本帖最后由 benjamin.zhu 于 2009-2-3 16:02 编辑
美国StockerYale公司 Lasiris TM 半导体激光器，激光光束利用透镜展成线性可以实现较为均匀的功率分布。如图所示： 
可以应用于位置较准、轮廓测量、半导体电路检测、工业检测等诸多领域。相比于普通半导体激光器有以下几方面优点：
1. 激光器输出波长、从输出功率非常稳定。激光器采用恒功率控制，利用 PIN 管探测输出光，通过反馈电路稳定输出功率。
2. 激光器可靠性强。静电保护，过电保护，温度保护。
3. 均匀的功率分布。
4. 多种输出功率选择，模式选择。如图所示：
5. 线宽、景深等技术参数优异。
6. 线性度好。
7. 准直角随温度漂移小。
8. 严格按照国际安全标准 IEC 、 CDRH 分级。
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美国StockerYale公司中国区总代理：北京路科锐威科技有限公司
地址：北京市海淀区上地东路1号盈创动力E座203A
电话：010-58858423-114（分机）
联系人：朱先生
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