Diamond Spectroscopy Using Discrete Photoluminescence Peaks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for distinguishing artificially irradiated colored diamonds from natural diamonds are unreliable, particularly in detecting spectral evidence of artificial treatments in yellow diamonds, and often require complex and costly equipment.
Innovation Solution
A spectroscopic analysis method and apparatus that illuminates diamonds with an excitation wavelength lower than 681 nm to detect specific discrete photoluminescence features at 681 nm, 705 nm, and 725 nm, allowing for the identification of artificial treatments by analyzing the spectral pattern in a relatively narrow spectral region, which can be done with a simpler and less expensive apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional spectroscopic methods are used to detect artificial treatments in diamonds, then measurement reliability is improved, but device complexity increases
Solution Approach 1:
The invention extracts and focuses on detecting only specific discrete photoluminescence features at 681 nm, 705 nm, and 725 nm, rather than analyzing the entire spectrum. This selective extraction of key spectral indicators simplifies the detection system while maintaining reliability for identifying artificial treatments in yellow diamonds.
Solution Approach 2:
The method applies local quality by concentrating measurement resources on specific wavelength regions (681 nm, 705 nm, 725 nm) where treatment indicators are most prominent. This localized spectral analysis improves detection reliability for treatment identification while reducing the need for complex full-spectrum instrumentation.
2Measurement precision
If conventional spectroscopic methods are used to detect artificial treatments in diamonds, then measurement precision is improved, but loss of energy increases
Solution Approach 1:
The invention extracts only the essential spectral information needed for treatment detection by focusing on three specific photoluminescence features. This selective extraction maintains measurement precision for treatment identification while significantly reducing the energy required for spectral acquisition and processing compared to comprehensive spectroscopic analysis.
3Measurement precision
If complex optics and cooling systems are used in spectroscopic apparatus, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The invention extracts the critical measurement information by focusing on specific discrete photoluminescence features rather than requiring comprehensive spectral coverage. This approach enables precise treatment detection using simpler optical systems without cooling requirements, as the key treatment indicators are captured in targeted wavelength regions.
Solution Approach 2:
The method replaces expensive, complex optical systems with simpler, room-temperature instrumentation that can still detect treatment indicators effectively. By focusing on specific photoluminescence features, the invention achieves reliable treatment detection using more accessible and less complex equipment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively differentiates artificially treated diamonds from natural ones by identifying distinct spectral patterns, reducing the need for complex optics and cooling systems, and providing a cost-effective solution for diamond analysis.
Implementation Method 1
generating light emission from a diamond upon optical excitation at an excitation wavelength equal to or smaller than 680 nm
Data Source
AI summary
A method of spectroscopic analysis of a diamond for determining whether the diamond has been artificially treated to change its colour may include: generating light emission from a diamond upon optical excitation at a wavelength equal to or smaller than 680 nm; optically producing a dispersed light emission; detecting the dispersed light emission across a collected spectral region including emission wavelengths of from 670 nm to 735 nm; processing the output signals to produce a spectral intensity distribution as a function of emission wavelengths; analysing the spectral intensity distribution to determine the presence or absence of a spectral pattern including either an intensity peak at 681 nm or a combination of intensity peaks at respective wavelengths 705 nm and 725 nm; if a spectral pattern is present, establishing that the diamond has been treated; and if a spectral pattern is absent, establishing that the diamond has not been treated.