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TrueColor Spectrometer

U.S. Patent 7,388,656 and Patent Pending
The TrueColor spectrometer is a patented
and patent pending spectrometer for color measurement and color grading of colored
diamonds and gemstones. The specially designed dual integrating sphere optical arrangement
provides the best possible illuminating and viewing geometry under a controlled
measurement environment for measuring the color of colored diamonds and gemstones. Its
color grading software can simulate the human visual color grading methods to grade the
color by considering the parameters of faceted gemstones: shape, size,
refractive index, and etc. The spectrometer is calibrated by a novel three-step method.
The TrueColor spectrometer can accurately and precisely measure the spectral reflectance, calculate the CIELAB data
and determine the average color grade and the true color grade. The average color
represents the color of the gem material, and the true color represents the face-up color,
i.e. the Characteristic color of colored diamonds and the Key
color for faceted colored gemstones. The spectrum can be used for diamond and
gemstone identification. |
Colored Diamonds
Nature, Color Grading and Buying Guide
Yan Liu

Written by the world renowned colored
diamonds authority with many beautiful pictures of the Aurora Diamond Collections. |
TrueDaylight
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U.S. Patent 7,378,784 |
Spectropyrometer
US Patents 7,004,624
and 7,052,177, New Portable Design
The alexandrite effect
spectropyrometer is a technical breakthrough for direct measurement of high to ultrahigh
temperature from 1000 K to 100,000 K. The spectropyrometer can directly measure
temperature for any types of radiating bodies: plasma, flame, electric arc, blackbody,
graybody and non-graybody. The alexandrite effect spectropyrometer can be widely used in
the fields of metallurgy, ceramic and glass manufacture, combustion, etc. It is especially
advantageous for ultrahigh temperature measurement of plasma jets, high temperature
flames, electric arcs and discharges. |
TrueGemColor
System

U.S. Patent 7,388,656
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Gem Materials
Color Change CZs
 
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Color Change
Glass

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Colored
Glass Filters Colored
glass filter design:
- Any Spectra transmittance
- Parallel arrangements
- Serial arrangements
- Serial and parallel
Treatment:
- Heating treatment
- tempering
- Thin film coating
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