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用于动态激励下表面纳米位移测量的全息耳镜。

Holographic otoscope for nanodisplacement measurements of surfaces under dynamic excitation.

作者信息

Flores-Moreno J M, Furlong Cosme, Rosowski John J, Harrington Ellery, Cheng Jeffrey T, Scarpino C, Santoyo F Mendoza

机构信息

Center for Holographic Studies and Laser micro-mechaTronics, WPI, Worcester, MA 01609, USA.

出版信息

Scanning. 2011 Sep-Oct;33(5):342-52. doi: 10.1002/sca.20283. Epub 2011 Sep 6.

DOI:10.1002/sca.20283
PMID:21898459
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3193549/
Abstract

We describe a novel holographic otoscope system for measuring nanodisplacements of objects subjected to dynamic excitation. Such measurements are necessary to quantify the mechanical deformation of surfaces in mechanics, acoustics, electronics, biology, and many other fields. In particular, we are interested in measuring the sound-induced motion of biological samples, such as an eardrum. Our holographic otoscope system consists of laser illumination delivery (IS), optical head (OH), and image processing computer (IP) systems. The IS delivers the object beam (OB) and the reference beam (RB) to the OH. The backscattered light coming from the object illuminated by the OB interferes with the RB at the camera sensor plane to be digitally recorded as a hologram. The hologram is processed by the IP using the Fresnel numerical reconstruction algorithm, where the focal plane can be selected freely. Our holographic otoscope system is currently deployed in a clinic, and is packaged in a custom design. It is mounted in a mechatronic positioning system to increase its maneuverability degrees to be conveniently positioned in front of the object to be measured. We present representative results highlighting the versatility of our system to measure deformations of complex elastic surfaces in the wavelength scale including a copper foil membrane and postmortem tympanic membrane. SCANNING 33: 342-352, 2011. © 2011 Wiley Periodicals, Inc.

摘要

我们描述了一种新型全息耳镜系统，用于测量受动态激励物体的纳米位移。此类测量对于量化力学、声学、电子学、生物学及许多其他领域中表面的机械变形是必要的。特别地，我们感兴趣于测量生物样本（如鼓膜）的声致运动。我们的全息耳镜系统由激光照明传输（IS）、光学头（OH）和图像处理计算机（IP）系统组成。IS将物光束（OB）和参考光束（RB）传输至OH。由OB照明的物体背向散射光在相机传感器平面与RB干涉，以数字方式记录为全息图。IP使用菲涅耳数值重建算法处理全息图，其中焦平面可自由选择。我们的全息耳镜系统目前已部署在诊所，并采用定制设计进行封装。它安装在机电定位系统中，以增加其可操纵度，从而方便地定位在待测物体前方。我们展示了具有代表性的结果，突出了我们系统在测量包括铜箔膜和死后鼓膜在内的波长尺度复杂弹性表面变形方面的多功能性。《扫描》33: 342 - 352, 2011。© 2011威利期刊公司。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/d7148e2f093f/nihms315885f10a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/ea5a5a293ec1/nihms315885f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/090d6908d66e/nihms315885f4.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/365f57c79e12/nihms315885f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/8e3c92d205bb/nihms315885f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/20a3c989b14d/nihms315885f8a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/d766b02d64eb/nihms315885f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/d7148e2f093f/nihms315885f10a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/ea5a5a293ec1/nihms315885f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/bec21a4fed66/nihms315885f2.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/090d6908d66e/nihms315885f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/2736de863781/nihms315885f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/365f57c79e12/nihms315885f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/8e3c92d205bb/nihms315885f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/20a3c989b14d/nihms315885f8a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/d766b02d64eb/nihms315885f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bd2/3193549/d7148e2f093f/nihms315885f10a.jpg

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