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Static short-range laser circumferential detection using a transmissive-reflective optical architecture.

Hong Chen1, Bingting Zha2, Zhen Zheng1

  • 1School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, China.

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This study introduces a novel static laser detection method for short-range circumferential sensing. The system achieves enhanced accuracy and energy uniformity for efficient target detection.

Keywords:
Circumferential detectionDefocus uniformityLaserOptical system

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Area of Science:

  • Optics
  • Laser Technology
  • Sensor Systems

Background:

  • Traditional dynamic scanning mechanisms for laser circumferential detection have limitations.
  • Short-range applications require improved static detection methods.

Purpose of the Study:

  • To propose a static detection method for short-range laser circumferential sensing.
  • To develop a transmissive-reflective combined optical system for uniform beam distribution.
  • To model and simulate the echo characteristics of the static detection field.

Main Methods:

  • Utilized a transmissive-reflective optical system applying equal energy distribution.
  • Transformed a Gaussian beam into a uniform-intensity conical detection beam.
  • Derived the echo equation for single-pulse detection based on near-field laser theory.
  • Developed an echo power distribution model.

Main Results:

  • Simulations showed systematic variations in annular light radius and beam tilt angle with cone angle and mirror displacement.
  • Echo amplitude positively correlated with emission power, cone angle, displacement, and target area.
  • The reshaped flat-top beam exhibited excellent energy uniformity (3.2% RMS error) and spatial stability (<2% spot diameter variation).

Conclusions:

  • The proposed method expands detection range and enhances accuracy for short-range laser circumferential sensing.
  • Achieved low-power static omnidirectional detection with improved energy uniformity.
  • Offers a novel and efficient solution for target circumferential sensing applications.