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Updated: Jun 11, 2026
07:03
In Situ Surface Temperature Measurement in a Conveyor Belt Furnace via Inline Infrared Thermography
Published on: May 30, 2020
Summary
This study measured refractive indices for CLAP glass systems. Results show low temperature coefficients, suggesting suitability for athermal infrared applications.
Area of Science:
- Materials Science
- Optical Engineering
- Solid State Physics
Background:
- Optical materials are crucial for infrared (IR) technologies.
- Understanding temperature-dependent optical properties is essential for device stability.
- Chalcogenide-Lanthanide-Alkali-Phosphosilicate (CLAP) glasses are investigated for optical applications.
Purpose of the Study:
- To measure the refractive indices of four CLAP glass systems.
- To determine the temperature coefficients of optical path lengths.
- To evaluate the potential of CLAP glasses for athermal applications in the IR region.
Main Methods:
- Refractive index measurements were conducted at room and elevated temperatures.
- The wavelength range for measurements was 0.4 to 5.5 micrometers.
- Optical path length temperature coefficients were calculated from the refractive index data.
Main Results:
- Refractive indices were successfully measured across the specified wavelength range.
- Temperature coefficients of optical path lengths were found to be less than 1 x 10(-6)/°C for wavelengths > 1 micrometer.
- This indicates minimal change in optical path length with temperature variations.
Conclusions:
- CLAP glass systems exhibit low temperature-dependent optical path length changes.
- These properties make CLAP glasses promising candidates for athermal applications.
- Specifically, their suitability for the infrared ray region is highlighted.
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