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[Lateral chromatic aberrations correction for AOTF imaging spectrometer based on doublet prism].

Hui-Jie Zhao1, Peng-Wei Zhou2, Ying Zhang2

  • 1Key Laboratory of Precision Opto-mechatronics Technology, Ministry of Education, School of Instrumentation Science & Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China. hjzhao@buaa.edu.cn

Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
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Summary

A new model accurately traces AOTF diffracted beams. A doublet prism method significantly reduces lateral color aberrations in AOTF imaging spectrometers, improving spectral image quality.

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Area of Science:

  • Optics and Photonics
  • Acousto-Optics
  • Spectroscopy

Context:

  • Acousto-optic tunable filters (AOTF) are crucial for spectral imaging.
  • Modeling acousto-optic interaction and correcting aberrations are key challenges.
  • Existing methods for AOTF imaging spectrometers suffer from significant lateral color.

Purpose:

  • To develop an accurate model for acousto-optic interaction in AOTF.
  • To propose and optimize a novel method for reducing lateral chromatic aberrations in AOTF imaging spectrometers.

Summary:

  • A user-defined surface function method models AOTF acousto-optic interaction based on wave-vector matching, validated by accurate ray tracing of diffracted beams.
  • A doublet prism, optimized using global optimization with a user-defined AOTF surface, effectively minimizes lateral chromatic aberrations.
  • This approach reduces lateral chromatic aberration to <0.0003 degrees, an order of magnitude improvement, and corrects spectral image shift.

Impact:

  • Enables more precise modeling of AOTF devices.
  • Significantly enhances the spectral image quality of AOTF imaging spectrometers.
  • Provides a convenient and effective solution for aberration correction in spectral imaging systems.