公开(公告)号：US20160109393A1

公开(公告)日：2016-04-21

申请号：US14518984

申请日：2014-10-20

Applicant: Andreas MANDELIS ,  Sreekumar KAIPLAVIL

Inventor： Andreas MANDELIS ,  Sreekumar KAIPLAVIL

IPC: G01N25/72 ,  G01N29/06 ,  G01J5/10

CPC classification number: G01N25/72 ,  G01J5/10 ,  G01J2005/0077 ,  G01J2005/106 ,  G01N29/0672 ,  G01N29/2418 ,  G01N29/343

Abstract: Photothermal imaging systems and methods are disclosed that employ truncated-correlation photothermal coherence tomography (TC-PCT). According to the example methods disclosed herein, photothermal radiation is detected with an infrared camera while exciting a sample with the chirped delivery of incident laser pulses (where the pulses have a fixed width), and time-dependent photothermal signal data is obtained from the infrared camera and processed using a time-evolving filtering method employing cross-correlation truncation. The cross-correlation truncation method results in pulse-compression-linewidth-limited depth-resolved images with axial and lateral resolution well beyond the well-known thermal-diffusion-length-limited, depth-integrated nature of conventional thermographic and thermophotonic modalities. As a consequence, an axially resolved layer-by-layer photothermal image sequence can be obtained, capable of reconstructing three-dimensional visualizations (tomograms) of photothermal features in wide classes of materials. Additional embodiments are disclosed in which the aforementioned systems and methods are adapted to photo-acoustic and acousto-thermal imaging.

Abstract translation: 公开了采用截断相关光热相干断层扫描（TC-PCT）的光热成像系统和方法。 根据本文公开的示例方法，用红外照相机检测光热辐射，同时用激光脉冲（其中脉冲具有固定宽度）的啁啾传递激发样品，并且从红外线获得时间依赖的光热信号数据 摄像机，并使用采用互相关截断的时变演进滤波方法进行处理。 互相关截断法导致脉冲压缩 - 线宽限制的深度分辨图像，其轴向和横向分辨率远远超出了常规热成像和热光学模式的公知的热扩散长度限制的深度集成性质。 因此，可以获得轴向分辨的逐层光热图像序列，能够重建宽范围材料中光热特征的三维可视化（断层图）。 公开了另外的实施例，其中上述系统和方法适用于光声和声 - 热成像。

公开(公告)号：US09810650B2

公开(公告)日：2017-11-07

申请号：US14518984

申请日：2014-10-20

Applicant: Andreas Mandelis ,  Sreekumar Kaiplavil

Inventor： Andreas Mandelis ,  Sreekumar Kaiplavil

IPC: G01J5/02 ,  G01N25/72 ,  G01J5/10 ,  G01N29/06 ,  G01N29/24 ,  G01N29/34 ,  G01J5/00

CPC classification number: G01N25/72 ,  G01J5/10 ,  G01J2005/0077 ,  G01J2005/106 ,  G01N29/0672 ,  G01N29/2418 ,  G01N29/343

Abstract: Photothermal imaging systems and methods are disclosed that employ truncated-correlation photothermal coherence tomography (TC-PCT). According to the example methods disclosed herein, photothermal radiation is detected with an infrared camera while exciting a sample with the chirped delivery of incident laser pulses (where the pulses have a fixed width), and time-dependent photothermal signal data is obtained from the infrared camera and processed using a time-evolving filtering method employing cross-correlation truncation. The cross-correlation truncation method results in pulse-compression-linewidth-limited depth-resolved images with axial and lateral resolution well beyond the well-known thermal-diffusion-length-limited, depth-integrated nature of conventional thermographic and thermophotonic modalities. As a consequence, an axially resolved layer-by-layer photothermal image sequence can be obtained, capable of reconstructing three-dimensional visualizations (tomograms) of photothermal features in wide classes of materials. Additional embodiments are disclosed in which the aforementioned systems and methods are adapted to photo-acoustic and acousto-thermal imaging.