Design and test of a simple high-temperature laser microrefractometer.

Area of Science:

• Optical Physics
• Materials Science
• Metrology

Background:

• Accurate refractive index determination is crucial for optical materials characterization.
• Temperature dependence significantly influences material optical properties.
• Existing refractometry methods may lack precision or broad spectral applicability.

Purpose of the Study:

• To present a novel laser microrefractometer design optimized for temperature-dependent studies.
• To measure the refractive index of methylene iodide across a wide temperature range and visible spectrum.
• To analyze and quantify temperature-induced experimental errors in refractometry.

Main Methods:

• Design and construction of a specialized laser microrefractometer.
• Measurement of methylene iodide refractive index from 22-92 °C.
• Utilized laser wavelengths: 442, 488, 515, 543, 594, and 633 nm.
• Detailed analysis of temperature-related experimental uncertainties.

Main Results:

• Successfully measured the temperature-dependent refractive index of methylene iodide.
• Data acquired across the visible spectrum (442-633 nm).
• Comprehensive error analysis performed for temperature-dependent measurements.

Conclusions:

• The developed laser microrefractometer is suitable for accurate, temperature-dependent refractive index measurements.
• Provides valuable optical property data for methylene iodide.
• Highlights the importance of rigorous error analysis in temperature-dependent optical measurements.