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Updated: Jun 7, 2026

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
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Automated Power Control for Mobile Laser Speckle Imaging System.

Hyeoungho Bae1, Yu-Chih Huang, Owen Yang

  • 1Department of Electrical and Computer Engineering, University of California, Irvine, Irvine, CA, 92697 USA.

IEEE Embedded Systems Letters
|November 6, 2010
PubMed
Summary
This summary is machine-generated.

This study introduces a new automated power control circuit for mobile Laser Speckle Imaging (LSI) systems. The pulsed laser operation significantly reduces power consumption and heat, enabling accurate blood perfusion measurements in a compact, stable device.

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Area of Science:

  • Biomedical Engineering
  • Optical Imaging
  • Medical Devices

Background:

  • Laser Speckle Imaging (LSI) offers high temporal resolution for blood perfusion measurement.
  • Miniaturization of LSI for mobile applications faces challenges in power consumption and heat dissipation.
  • Maintaining detection accuracy is crucial for mobile LSI instrumentation.

Purpose of the Study:

  • To develop a mobile Laser Speckle Imaging system with reduced power consumption and heat.
  • To propose a novel automated power control (APC) circuit for pulsed laser operation in LSI.
  • To ensure system stability and maintain detection accuracy in a compact LSI device.

Main Methods:

  • Implementation of pulsed laser operation synchronized with camera shutter.
  • Development and validation of a new automated power control (APC) circuit.
  • System evaluation using Pspice simulations and a prototype APC board with a commercial camera.

Main Results:

  • Pulsed laser operation significantly reduces power consumption compared to continuous wave.
  • Synchronized pulsing maintains raw speckle image quality similar to conventional LSI.
  • Reduced power consumption leads to lower operating temperatures and increased system stability.

Conclusions:

  • The proposed APC circuit effectively enables pulsed laser operation for mobile LSI.
  • This approach addresses key challenges in developing compact, power-efficient LSI instrumentation.
  • The validated solution facilitates the creation of stable and accurate mobile blood perfusion monitoring devices.