Ring-shaped optical coherence lattice distribution produced by light waves on scattering

2019 ◽  
Vol 434 ◽  
pp. 157-162 ◽  
Author(s):  
Zhanghang Zhu ◽  
Hao Wu ◽  
Ke Cheng ◽  
Tao Wang
Keyword(s):  
Optical Coherence ◽  
Lattice Distribution ◽  
Light Waves

scholarly journals Automated Defect Inspection Algorithm Incorporated Spectral-Domain Optical Coherence Tomography for Optical Polarizing Thin Films

2020 ◽  
Vol 9 (3) ◽  
pp. 1362-1365
Keyword(s):  
Thin Films ◽  
Optical Coherence Tomography ◽  
Liquid Crystal Display ◽  
Spectral Domain ◽  
Optical Coherence ◽  
Defect Inspection ◽  
Inspection Method ◽  
Light Waves ◽  
Information Layer ◽  
Sd Oct

Optical polarizing thin film is an optical filter enables light waves of a specific polarization pass through while blocking light waves of other polarizations. Optical polarizing thin films control the brightness of back-light unit for LCD (liquid crystal display) panel, which is essential to produce LCD modules. Defect inspection of polarizing thin films is an important feature during the manufacturing process that is helpful to improve the product quality. In the current study, an automated defect inspection algorithm is introduced and incorporated with a well-known non-destructive and non-contact optical inspection method called spectral domain optical coherence tomography (SD-OCT) to pre-identify defective sub-surface as well as top-surface locations of optical polarizing thin films Polarizing thin films employed in this study consist of 6 layers. The tomographic information, layer information, and defective locations were sufficiently identified through the SD-OCT system owing high-axial resolution. The acquired results indicate the possible application of the proposed system in optical polarizing thin films for the quality assurance

Study of Optical Coherence Theory in Measurement

2014 ◽  
Vol 568-570 ◽  
pp. 71-75
Author(s):  
Shuai Kang ◽  
Guang Yi Luo
Keyword(s):  
Interference Pattern ◽  
High Sensitivity ◽  
Optical Path Difference ◽  
Path Difference ◽  
Optical Coherence ◽  
Interference Effects ◽  
Light Interference ◽  
Light Waves ◽  
Uniform Medium ◽  
Transverse Electromagnetic

Light is a transverse electromagnetic wave, which has the volatility and particles. When light waves are added up in the spatial uniform medium, different conditions will produce interference effects in the meeting area. Optical path difference affects the distribution of the interference pattern directly, and the light interference pattern gives information of phase and amplitude in turn. Due to the measurement precision and extremely high sensitivity of response, the principle of optical coherence has been studied based on measuring the related physical quantity indirectly.

Optical coherence tomography

ESC CardioMed ◽  
2018 ◽  
pp. 631-636
Author(s):  
Francesco Prati ◽  
Vito Ramazzotti ◽  
Laura Gatto ◽  
Mario Albertucci
Keyword(s):  
Optical Coherence Tomography ◽  
Acute Coronary Syndromes ◽  
Fibrous Tissue ◽  
Inflammatory Cells ◽  
Optical Coherence ◽  
Stent Deployment ◽  
Light Waves ◽  
Stent Length ◽  
Coronary Syndromes ◽  
Artery Disease

Frequency domain optical coherence tomography (FD-OCT) uses infrared light waves, providing intracoronary images at a high resolution and enabling the characterization of the structure and extent of coronary artery disease in unprecedented detail. OCT can study plaque components such as fibrous tissue, calcium, and lipids with high accuracy. Furthermore, the technique is potentially able to depict inflammatory cells, crystals of cholesterol, and intimal vasculature, and can clarify the mechanism of acute coronary syndromes. OCT is therefore the most promising technique to study plaque vulnerability. FD-OCT, with its ability to distinguish fresh thrombus from other tissues, can also identify culprit lesions in patients with acute coronary syndromes. Some studies are encouraging the adoption of an OCT-guided approach of stent deployment, showing the superiority versus an angiography-guided strategy. The assessment of plaque composition pre-intervention is instrumental for device selection. Identification and quantification of calcium is key in deciding whether to perform direct stenting or to proceed with tissue ablation in the presence of massive calcifications. Furthermore, FD-OCT can be used to size stent length and diameter. After intervention, recent data established the OCT metrics to be adopted to fine-tune stenting procedures.

Optical coherence tomography

ESC CardioMed ◽  
2018 ◽  
pp. 631-636
Author(s):  
Francesco Prati ◽  
Laura Gatto ◽  
Enrico Romagnoli ◽  
Luca Di Vito
Keyword(s):  
Optical Coherence Tomography ◽  
Acute Coronary Syndromes ◽  
Fibrous Tissue ◽  
Inflammatory Cells ◽  
Optical Coherence ◽  
Stent Deployment ◽  
Light Waves ◽  
Stent Length ◽  
Coronary Syndromes ◽  
Artery Disease

Frequency domain optical coherence tomography (FD-OCT) uses infrared light waves, providing intracoronary images at a high resolution and enabling the characterization of the structure and extent of coronary artery disease in unprecedented detail. OCT can study plaque components such as fibrous tissue, calcium, and lipids with high accuracy. Furthermore, the technique is potentially able to depict inflammatory cells, crystals of cholesterol, and intimal vasculature, and can clarify the mechanism of acute coronary syndromes. OCT is therefore the most promising technique to study plaque vulnerability. FD-OCT, with its ability to distinguish fresh thrombus from other tissues, can also identify culprit lesions in patients with acute coronary syndromes. Some studies are encouraging the adoption of an OCT-guided approach of stent deployment, showing the superiority versus an angiography-guided strategy. The assessment of plaque composition pre-intervention is instrumental for device selection. Identification and quantification of calcium is key to decide whether to perform direct stenting or to proceed with tissue ablation in the presence of massive calcifications. Furthermore, FD-OCT can be used to size stent length and diameter. After intervention recent data established the OCT metrics to be adopted to fine-tune stenting procedures.

1086: Cystoscopic Optical Coherence Tomography in Diagnosis and Management of Clinical Bladder Tumors

2007 ◽  
Vol 177 (4S) ◽  
pp. 358-359 ◽  
Author(s):  
Christopher S. Lee ◽  
Alek Mishail ◽  
Jason M. Kim ◽  
Alexander Kirshenbaum ◽  
Howard L. Adler ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Bladder Tumors ◽  
Diagnosis And Management

1227: Optical Coherence Tomography-Guided Surgery of Bladder Cancer

2006 ◽  
Vol 175 (4S) ◽  
pp. 395-395
Author(s):  
Nancy J. Tresser ◽  
Elena V. Zagaynova ◽  
Olga S. Streltsova ◽  
Natalia D. Gladkova ◽  
Vladislav A. Kamensky ◽  
...  
Keyword(s):  
Bladder Cancer ◽  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Guided Surgery

258: Diagnosis and Intraoperative Staging of Bladder Disease by in-vivo Optical Coherence Tomography (OCT)

2004 ◽  
Vol 171 (4S) ◽  
pp. 68-68 ◽  
Author(s):  
Markus D. Sachs ◽  
Dmitry Daniltchenko ◽  
Eva Lankenau ◽  
Frank Koenig ◽  
Gerion Huettmann ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Bladder Disease
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