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.

Written by the world renowned colored diamonds authority with many beautiful pictures of the Aurora Diamond Collections.

U.S. Patent 7,378,784

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.

U.S. Patent 7,388,656