Ia type diamond color quick grading method based on spectrum

Ia type diamond color quick grading method based on spectrum

  • CN 103,090,973 B
  • Filed: 01/07/2013
  • Issued: 01/14/2015
  • Est. Priority Date: 01/07/2013
  • Status: Active Grant
First Claim
Patent Images

1. , based on the Ia type diamond color rapid classification method of spectrum, it is characterized in that, comprising:

  • S1, the complex light of equilibrium is irradiated on tested diamond;

    S2, use integrating sphere collect the complex light reflected through tested diamond;

    After S3, the light collected integrating sphere carry out light splitting, use ccd detector to detect, and then obtain the reflectance spectrum of tested diamond;

    S4, selected suitable wavelength, as normalization reference point, after being normalized, are chosen nitrogen absorption band from normalized reflectance spectrum, then calculate the area of nitrogen absorption band to the reflectance spectrums of tested diamond;

    S5, the area of nitrogen absorption band and level threshold value file to be compared, color grading is carried out to tested diamond.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×