Acquisition of an Electronic Holography System

歌珊学院物理系正在进入一个新的研究和教学领域，在振动物体的全息研究。这代表了我们完善的本科研究计划的一个深思熟虑的新方向。我们的目标是进入一个对学生有很大价值的领域，并开展一个本质上有趣的，教学上有用的研究计划，并将我们与包括乐器制造商在内的当地产业联系起来。我们建议使用电子全息系统（通常称为电视全息）研究乐器的振动模式。这样的系统可以创建一个图像的振动物体装饰图案的条纹，显示振动模式。我们还将使用有限元分析（FEA）来模拟这些乐器的振动。通过与全息结果的比较和模型的优化，我们将建立一个精确的有限元分析模型，可以用来尝试新的可能性。歌珊学院物理系有一个历史，我们的X射线衍射专业知识服务于某些地方工业。同样，电子全息照相系统将提供无损检测能力，这对于研究应力-应变、变形和细微裂纹和缺陷的位置是有价值的。这种能力将是一个宝贵的除了实习机会，为我们的（二元）工程专业的学生。

The Goshen College Physics Department is stepping into a new area of research and teaching in the holographic study of vibrating objects. This represents a deliberate new direction for our well-established undergraduate research program. Our aim is to move into an area of great value to students and to carry out a research program that is intrinsically interesting, pedagogically useful, and connects us to local industry including musical instrument manufacturers.We propose to study the vibration modes of musical instruments using an electronic holography system (often called TV holography). Such a system can create an image of a vibrating object decorated with a pattern of fringes, which show the vibration mode. We will also use finite element analysis (FEA) to model the vibration of these musical instruments. By comparing with the holographic results and refining the model, we will build an accurate FEA model, which can be used to try out new possibilities.The Goshen College Physics Department has a history of serving certain local industries with our x-ray diffraction expertise. Similarly an electronic-holography system will provide a nondestructive testing capability that will be of value providing studies of stress-strain deformation and location of hairline cracks and defects. This capability will be a valuable addition to internship opportunities for our (binary) engineering students.