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Updated: Jul 15, 2025

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An Automatic Calibration Method for the Field of View Aberration in a Risley-Prism-Based Image Sensor.

Zhonglin Lin1, Wenchao Liu1, Jinyu Gan1

  • 1School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, China.

Sensors (Basel, Switzerland)
|September 28, 2023
PubMed
Summary
This summary is machine-generated.

An automated calibration method enhances Risley-prism image sensors. This technique improves aberration correction speed, accuracy, and stability for wider fields of view.

Keywords:
aberration correctionautomatic calibrationfield of viewrisley prisms

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Area of Science:

  • Optics and Photonics
  • Image Sensor Technology
  • Computational Imaging

Background:

  • Risley-prism-based image sensors offer expanded fields of view via beam control.
  • Increased prism angles enhance field of view magnification but worsen imaging aberrations.
  • Advanced aberration correction is crucial for these sensors.

Purpose of the Study:

  • To develop an automated calibration method for Risley-prism image sensors.
  • Enhance the speed, accuracy, and stability of aberration correction.
  • Address the challenges posed by increased aberrations in wide-field imaging.

Main Methods:

  • Utilized a two-axis turntable to acquire image datasets of a calibration plate at varying prism angles and object distances.
  • Applied bicubic interpolation for pre-processing calibration plate images.
  • Calculated and optimized calibration parameters for aberration correction.

Main Results:

  • Verified the feasibility of the automated calibration method through experimental results.
  • Achieved a reprojection error within 0.26 pixels at a distance of 3.6 m.
  • Demonstrated effective aberration correction with the proposed method.

Conclusions:

  • The automated calibration method is effective for Risley-prism image sensors.
  • The system achieves high accuracy and stability in aberration correction.
  • This approach enables reliable wide-field imaging with minimized aberrations.