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This study developed inexpensive, high-precision touchless technology using static-electricity-induced luminescence (SEL) detected by a web camera. The system accurately tracks finger position in real-time, offering a novel solution for contactless applications.

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Optoelectronics

Background:

  • Touchless technology is crucial for preventing infectious disease transmission, as highlighted by the COVID-19 pandemic.
  • Existing solutions often lack cost-effectiveness or precision, creating a need for advanced contactless systems.

Purpose of the Study:

  • To develop an affordable and highly accurate touchless sensing technology.
  • To investigate the application of static-electricity-induced luminescence (SEL) for non-contact measurements.

Main Methods:

  • A substrate was coated with a luminescent material to generate SEL upon high voltage application.
  • An inexpensive web camera was employed to detect SEL emission.
  • The relationship between non-contact distance and SEL was analyzed, with accuracy assessed.

Main Results:

  • Static-electricity-induced luminescence was successfully emitted between 20-200 mm from the device.
  • The web camera achieved sub-millimeter accuracy (<1 mm) in detecting SEL position.
  • The developed technology demonstrated real-time, high-accuracy detection of human finger position.

Conclusions:

  • The developed SEL-based touchless technology is inexpensive and precise.
  • This system offers a viable solution for accurate real-time contactless sensing.
  • Potential applications include medical devices, human-computer interaction, and safety systems.