公开(公告)号：US11867620B2

公开(公告)日：2024-01-09

申请号：US17600438

申请日：2019-12-10

Applicant: Purdue Research Foundation

Inventor： Ji-Xin Cheng ,  Yeran Bai ,  Delong Zhang ,  Ali Shakouri ,  D. Kerry Maize

IPC: G01N21/3577

CPC classification number: G01N21/3577 ,  G01N2201/06113

Abstract: Systems and methods for detecting photothermal effect in a sample are described herein. In these systems and methods, a pump source is configured to generate a pump pulse train, a probe source is configured to generate a probe pulse train and is synchronized with the pump pulse train, and a camera collects the resulting data. The camera is configured to collect a first signal corresponding to a hot frame, wherein the hot frame includes visible probe beam as modified by a pump beam and a second signal corresponding to a cold frame, wherein the cold frame includes visible probe beam that has not been modified by a pump beam. A processor can subtract the second signal from the first signal to detect the photothermal effect.