Oblong Diamond Cut Angles for Light Amplification
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Solution Overview
Problem
Non-round diamond cuts, such as emerald and cushion cuts, lack the brilliance and light reflection characteristics of round brilliant cuts, leading to a less fiery appearance and reduced light amplification.
Innovation Solution
A unique cut for oblong gemstones, including diamonds, with specific parameters such as a crown angle of 30-36 degrees, pavilion angle of 30-34 degrees, and total depth percentage of 40-50%, where the pavilion angle is equal to or smaller than the crown angle by no more than 6 degrees, enhancing light reflection and amplification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional emerald cut parameters are used (crown angle 35-36°, pavilion angle 40-41.5°, total depth 60-70%), then the diamond maintains traditional emerald cut proportions, but light amplification and brilliance are insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the conventional emerald cut parameters: crown angle reduced to 30-36°, pavilion angle reduced to 30-34°, and total depth percentage reduced to 40-50%. These parameter changes optimize the light reflection paths between crown and pavilion surfaces, creating brilliant-like reflection patterns that significantly enhance light amplification while maintaining the oblong emerald cut shape.
2Illumination intensity
If pavilion angle is reduced to 30-34 degrees, then light reflection path is optimized for brilliance, but crown angle must be adjusted to maintain proper geometric relationship
Solution Approach 1:
The patent applies asymmetry by establishing a specific geometric relationship where the crown angle is always greater than or equal to the pavilion angle, with the difference not exceeding 6 degrees. This asymmetric relationship between crown and pavilion angles creates optimal light reflection paths that enhance brilliance, while the structured asymmetry maintains geometric coherence and facilitates manufacturing.
3Illumination intensity
If total depth percentage is reduced to 40-50%, then light amplification is enhanced, but crown height and pavilion depth proportions must be carefully balanced
Solution Approach 1:
The patent applies local quality by specifying that the crown height percentage should be 8-13% and the girdle height percentage should be 3.5-4.5%, while the total depth percentage is reduced to 40-50%. These localized quality specifications ensure that light reflection is optimized at critical surfaces (crown and girdle) while the overall depth is reduced to enhance light amplification, creating a balanced proportioning system.
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
The described cut achieves a brilliant-like reflection pattern with increased light amplification, creating a more sparkling and elegant appearance by optimizing the light reflection path between the crown and pavilion surfaces.
Implementation Method 1
the pavilion angle and crown angle are so related that light entering the table of the precious stone will reflect internally between the pavilion and crown surfaces with a brilliant-like reflection pattern enhancing the light returning to the observers eye
Data Source
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AI summary
A sparkling, oblong-shaped precious stone, such as an emerald or cushion cut diamond is formed by providing these diamonds with two long crown surfaces extending at crown angle and two long pavilion surfaces extending at a pavilion angle, where the crown angle is in the range of 30-36 and the pavilion angle is in the range of 30-34. The crown angle and the pavilion angle are so formed that the crown angle is either equal to or larger than the pavilion angle by an angle that does not exceed 6 degrees.