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Related Experiment Video

Updated: Oct 25, 2025

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
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A Micron-Sized Laser Photothermal Effect Evaluation System and Method.

Jingjing Xu1,2, Ming Zeng1, Xin Xu1

  • 1Institute of Microelectronics, Shandong University, Jinan 250102, China.

Sensors (Basel, Switzerland)
|August 10, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed a new system to measure laser-induced heating effects at the microscale. This tool provides crucial real-time data for medical laser applications and optical stimulation research.

Keywords:
laser-thermocouple interactionmicron-sized laserphotothermal effectstemperature measurement systemthermocoupleswavelength

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Area of Science:

  • Biomedical Engineering
  • Optical Physics
  • Thermal Measurement

Background:

  • Photothermal effects of lasers are vital in medical applications and optical cochlear implants.
  • Evaluating thermal effects of microscale laser spots on tissues is challenging.
  • Existing methods lack sufficient temporal, spatial, and temperature resolution.

Purpose of the Study:

  • To develop a novel multi-wavelength micro-scale laser thermal effect measuring system.
  • To enable quantitative, real-time evaluation of laser-tissue thermal interactions.
  • To provide reference data for future research on light-stimulated neural activity.

Main Methods:

  • A system with high temporal, spatial, and temperature resolutions was designed.
  • Accurate 3D positioning and flexible pulsed laser parameters were utilized.
  • Temperature changes were systematically measured on a Pd/Cr thermocouple junction using six laser wavelengths.

Main Results:

  • The system successfully measured temperature changes induced by micron-sized laser spots.
  • Reference data on laser spot thermal effects were obtained for multiple wavelengths.
  • The developed system demonstrated stability, reliability, and universality.

Conclusions:

  • A stable, reliable, and universal tool for quantitative micro-scale laser thermal effect measurement was developed.
  • The system provides essential reference data for medical laser applications.
  • This work supports future research into light-stimulated neuron excitation.