Method to measure polarization properties of components based on bidirectional optical path.

Area of Science:

• Optical Engineering
• Polarimetry
• Materials Science

Background:

• Mueller matrix polarimeters are crucial for target characterization.
• Existing polarimeters are unsuitable for complex environments like submersible observation windows.
• Real-time, non-contact measurement of polarization properties is needed for specialized optical components.

Purpose of the Study:

• To develop a novel measurement method for obtaining polarization properties of optical components in complex environments.
• To introduce a decomposition technique for extracting meaningful Mueller matrix data from bidirectional measurements.
• To enhance the accuracy and applicability of Mueller matrix polarimetry for specialized targets.

Main Methods:

• A bidirectional optical path measurement method was designed for non-contact, real-time data acquisition.
• A polar decomposition-based method was developed to isolate forward Mueller matrices from bidirectional measurements.
• Simulations and experimental validations, including in-situ calibration, were performed to assess accuracy and error impacts.

Main Results:

• The bidirectional optical path method successfully acquired polarization properties.
• The decomposition method effectively yielded a single forward Mueller matrix.
• Experimental measurements on air and wave plates verified the proposed method's accuracy and robustness against systematic errors.

Conclusions:

• The proposed bidirectional measurement and decomposition method effectively characterizes polarization properties of challenging optical components.
• This technique serves as a valuable supplement to existing Mueller matrix polarimeters.
• The method holds significant potential for applications in deep-sea exploration and other demanding fields.