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Refractive-index measurement of bulk materials: prism coupling method
Applied Optics
|April 15, 1983
Summary
This study introduces a simple prism coupling method for measuring bulk material refractive indices. The technique offers easy sample preparation and accuracy comparable to established methods.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Accurate measurement of refractive indices is crucial for characterizing optical materials.
- Existing methods may require complex procedures or specialized equipment.
Purpose of the Study:
- To present a straightforward and efficient method for determining the refractive indices of bulk materials.
- To demonstrate the advantages of simplicity and ease of sample preparation.
Main Methods:
- Utilizes a prism coupling technique.
- Measures the critical angle of total internal reflection at the prism base.
- Determines refractive index from the incident angle at which reflection breaks.
Main Results:
- The prism coupling method provides accurate refractive index measurements.
- Accuracy is comparable to the minimum deviation method with a calibrated prism.
- Experimental results for various materials were obtained and analyzed.
Conclusions:
- The described prism coupling method is a viable and advantageous alternative for refractive index measurement.
- Its simplicity and minimal sample preparation requirements make it suitable for broad application.
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