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Step-Free Coating Technique for Four-Quadrant Wind Imaging Interferometer.

Tingyu Yan1, Luhan Huang1, Yanqiang Wang2

  • 1Key Laboratory of Atmospheric Sounding, College of Electronic Engineering, Chengdu University of Information Technology, Chengdu 610225, China.

Sensors (Basel, Switzerland)
|September 13, 2025
PubMed
Summary
This summary is machine-generated.

A novel step-free coating technique enhances four-quadrant wind imaging interferometers for precise wind field measurements. This advancement offers high reflectivity and improved phase precision in compact, solid-state designs.

Keywords:
phase stepsstep-free coatingwind imaging interferometer

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Area of Science:

  • Optics and Photonics
  • Metrology
  • Thin-Film Science

Background:

  • Four-quadrant wind imaging interferometers measure wind fields using four phase states.
  • Existing systems benefit from low light source sensitivity and compact design.
  • Advancements are needed for improved precision and applicability in solid-state configurations.

Purpose of the Study:

  • To introduce a novel step-free, four-quadrant, stepped-phase coating technique.
  • To enhance the performance of all-solid-state wind imaging interferometers.
  • To improve reflectivity and stepped-phase precision.

Main Methods:

  • Detailed analysis of material selection and coating architecture for four-quadrant components.
  • Development of a step-free, stepped-phase coating process.
  • Computer-aided thin-film design and simulation for verification.

Main Results:

  • The proposed technique offers high reflectivity.
  • Improved stepped-phase precision for the interferometer quadrants.
  • Successful verification through computer simulations.

Conclusions:

  • The step-free coating technique is a viable enhancement for wind imaging interferometers.
  • This method supports the development of more precise and compact all-solid-state wind measurement systems.
  • The findings pave the way for advanced optical metrology applications.