Liu Research Laboratories, LLC

Liu Research Laboratories, LLC
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About Us

R&D:
Pyrometry
Color Scinece
Optics
Gemology

Products:
Spectropyrometer
Spectrometer
TrueGemColor System
Gem Materials
     Cubic Zirconia
     Color change
Light Sources
      Daylight
      Display
Glass Filters

Services:
Pyrometry
Gem Identification
Color Science
Glass Filter Design

TrueColor Spectrometer U.S. Patent Pending TrueColor spectrometer is an advanced spectral measurement system for color measurement and color grading of faceted gemstones, colored diamonds and colorless diamonds. 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 faceted gems. The color grading software can simulate the visual color grading methods to grade the color by “considering” the parameters of faceted gemstones: shape, size, refractive index and intensity of fluorescence. 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 “Key color” for faceted colored gemstones, and the “Characteristic color” for colored diamonds.	Gem Materials Color Change CZs Color Change Glass
	TrueGemColor System U.S. Patent Pending
Spectropyrometer US Patents 7,004,624 and 7,052,177, New Portable Design The Sun is in plasma state in thermal equilibrium. The temperature of the Sun cannot be measured by any line emission methods. Only our patented alexandrite effect spectropyrometer can directly and correctly measure the surface temperature of the Sun. The alexandrite effect spectropyrometer is a technical breakthrough for direct measurement for 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. Our spectropyrometer is your essential instrument for any research and development project involving high to ultrahigh temperature measurement. We provide portable optic system, zoom telescope, probe and integrating sphere for temperature measurement. Through the zoom lens and eyepiece of the potable optic system a user can directly observe and measure a target from 0.8 mm to infinite. Our zoom telescope has a 20X objective lens with a focal length 0.7 m to infinite. It can measure a target as small as 1 mm.	TrueDaylight . U.S. Patent Pending
	Colored Glass Filters All types of colored glass filters: - Any shapes - Any thickness 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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Copyright © 2003 Liu Research Laboratories, LLC, 2202 Seaman Avenue, South El Monte, CA 91733.
Last modified: March 03, 2007