Refractive index determination of transparent samples by noniterative phase retrieval

Area of Science:

• Optics
• Materials Science

Background:

• Refractive index is a key property of transparent materials.
• Accurate determination is crucial for various applications.
• Existing methods may have limitations in simplicity or accuracy.

Purpose of the Study:

• To present a straightforward and highly accurate method for determining the refractive indices of transparent specimens.
• To establish a quantitative approach for refractive index measurement.

Main Methods:

• Evaluating the optical path difference introduced by the specimen.
• Incorporating geometric parameters of the specimen.
• Utilizing a noninterferometric, noniterative phase retrieval technique based on Green's functions.

Main Results:

• The method successfully determines refractive indices by analyzing optical path differences.
• The technique is demonstrated to be highly accurate and quantitative.
• Phase distribution is retrieved without interferometry or iteration.

Conclusions:

• The presented method offers a simple yet precise way to measure refractive indices.
• This noninterferometric approach provides a valuable tool for materials characterization.
• The technique's accuracy and quantitative nature make it suitable for scientific research.