Analytical phase-measuring technique for retardation measurements

Area of Science:

• Optical Physics
• Materials Science

Background:

• Retardation measurements are crucial for characterizing birefringent materials.
• Existing phase detection methods can be complex or limited in accuracy.

Purpose of the Study:

• To propose a novel analytical method for phase detection in retardation measurements.
• To enhance the accuracy and efficiency of phase difference determination in birefringent samples.

Main Methods:

• Utilized a linear polariscope with a lambda (λ) plate for experimental setup.
• Measured intensity modulation by varying wavelength and recording phase-shifted intensity values.
• Applied Greivenkamp's algorithm, common in phase-stepping interferometry, to determine phase differences.

Main Results:

• Successfully determined the phase difference between light components along principal axes of birefringent samples.
• Performed error analysis to validate the method's reliability.
• Developed simplified algorithms for expedited data analysis.

Conclusions:

• The proposed method achieves accuracy comparable to established phase detection techniques.
• Offers a potentially simpler and faster approach for retardation measurements.
• Provides a valuable tool for optical characterization of birefringent materials.