Related Experiment Video
Updated: Jun 8, 2026
09:01
High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
Published on: April 16, 2017
Surface temperature imaging below 300 K using La(2)O(2)S:Eu
Applied Optics
|October 12, 2010
Summary
This study demonstrates surface temperature imaging using lanthanum oxysulfide europium phosphor coatings. This method achieves 1 K temperature resolution for visible light imaging with CCD cameras.
Area of Science:
- Materials Science
- Optical Physics
- Thermometry
Background:
- Accurate surface temperature measurement is crucial in various scientific and industrial applications.
- Existing thermometry methods may have limitations in resolution, range, or applicability to specific materials.
- Luminescent materials offer potential for non-contact temperature sensing.
Purpose of the Study:
- To demonstrate a novel method for surface temperature imaging using a europium-doped lanthanum oxysulfide phosphor.
- To evaluate the performance of this phosphor-based thermometry in terms of temperature resolution and range.
- To enable temperature imaging using standard Charge-Coupled Device (CCD) cameras.
Main Methods:
- Utilizing the ratio of visible emissions from the (5)D(2) and (5)D(1) energy levels of Eu3+ ions in a La(2)O(2)S:Eu phosphor coating.
- Developing an imaging system that employs standard CCD cameras to capture the phosphor emissions.
- Calibrating the system to correlate emission ratios with surface temperature.
Main Results:
- Successful generation of surface temperature images based on the phosphor's luminescence.
- Achieved a temperature resolution of 1 Kelvin (K).
- Demonstrated functionality over a temperature range of 193 K to 293 K (-80 °C to 20 °C).
Conclusions:
- Lanthanum oxysulfide: europium phosphor coatings are effective for non-contact surface temperature imaging.
- The developed method provides high temperature resolution using conventional CCD imaging technology.
- This technique offers a promising approach for temperature monitoring in diverse environments.
Related Concept Videos
01:27Atomic Spectroscopy: Effects of Temperature
Atomization, converting samples into gas-phase atoms and ions, is essential for atomic spectroscopy. The flame temperature required for atomization affects the efficiency of the atomic spectroscopic methods by increasing the atomization efficiency and the relative population of the excited and ground states.
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature from...
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature from...
01:14Temperature Measurement Sites
A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
01:16Flame Photometry: Lab
In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...