Diamond Classification via UV Transmission and Reference Comparison
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Solution Overview
Problem
Existing methods for distinguishing natural diamonds from synthetic or treated diamonds are inefficient, costly, and lack accuracy, particularly in determining the presence of nitrogen centers, which are crucial for classification, due to reliance on complex and costly equipment and subjective user interpretations.
Innovation Solution
A method using a light source emitting wavelengths between 225 nm to 300 nm and a reference diamond with controlled A center concentrations to measure and compare light transmission, enabling accurate classification of colorless or near-colorless diamonds as natural and untreated through a compact, cost-effective device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex equipment like phosphorescopes or FTIR spectrometers are used to detect nitrogen centers, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts the essential detection function from complex equipment like phosphorescopes and FTIR spectrometers. By using a simple UV light source and visual observation method, it isolates the core detection capability (observing fluorescence intensity) while eliminating unnecessary complex components, achieving accurate nitrogen center detection without sophisticated equipment
Solution Approach 2:
The patent replaces expensive, complex detection equipment with inexpensive, simple components. A low-cost UV light source and basic visual observation system substitute for costly phosphorescopes and FTIR spectrometers, making the detection method accessible and practical for routine diamond classification
2Ease of operation
If visual observation methods are used to discern diamonds, then ease of operation is improved, but measurement precision deteriorates due to subjective interpretation
Solution Approach 1:
The patent changes the observation parameter from subjective visual assessment to quantitative fluorescence intensity measurement. By comparing the intensity of UV-induced fluorescence between the test diamond and reference diamond, the method transforms subjective visual judgment into an objective, measurable parameter that can be consistently evaluated
Solution Approach 2:
The patent introduces a feedback mechanism by comparing the fluorescence intensity of the test diamond against that of a reference diamond with known properties. This comparative feedback allows the observer to objectively determine whether the test diamond is natural or treated, eliminating subjective interpretation while maintaining operational simplicity
3Reliability
If sealing methods like clay are used to prevent light leakage, then reliability is improved, but ease of operation worsens due to difficult sealing and potential undetected failures
Solution Approach 1:
The patent removes the sealing step entirely from the detection procedure. By designing an open observation system where light leakage is prevented through proper optical geometry rather than physical sealing, the method eliminates the complexity and reliability issues associated with clay sealing while maintaining measurement accuracy
4Measurement precision
If multiple tests on specific characteristics are used to discern natural diamonds, then measurement precision is improved, but productivity deteriorates due to time-consuming procedures
Solution Approach 1:
The patent extracts the single most diagnostic characteristic (fluorescence intensity under UV light) from the multiple tests traditionally performed on diamonds. By focusing solely on this one decisive parameter rather than conducting multiple separate tests, the method maintains high accuracy while dramatically improving classification speed and productivity
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 approach allows for precise and economical classification of diamonds by comparing light transmission through the diamond to a reference, providing a reliable method for distinguishing natural from synthetic or treated diamonds, independent of diamond cut and size, and avoiding subjective interpretations.
Implementation Method 1
The A and B centres hardly contribute to the colour of the diamond in the visible part of the spectrum. However, they provide for a specific absorption in the infrared part of the spectrum
Implementation Method 2
a measured light transmission through the diamond, whereby the diamond is irradiated by a light source which emits light having a certain wavelength, and the transmission of this light through the diamond is measured
Data Source
AI summary
The invention concerns a method for qualifying a diamond on the basis of a measured light transmission through the diamond, whereby the diamond is radiated by a light source which emits light having a wavelength in a range of 225 nm to 300 nm, whereby the transmission of said light through the diamond is compared to a reference value which corresponds to the transmission of said light through a reference diamond, which is a cut colourless or near colourless diamond with a concentration of A centers between 7 ppm and 22 ppm, and whereby the diamond is classified as natural and not colour-treated if the transmission through the diamond is smaller than or equal to the reference value.