Patent ID: 9689743
Date: 2017-06-27
CPC Classifications: G01J,G01N

Claim:
1. A method comprising: adjusting a first position of a sample on a plane substantially perpendicular to an angle of a light beam emitted from a Raman spectroscopic laser; adjusting a tilt angle of the sample relative to the Raman spectroscopic laser based on a comparison of an optical image of the sample and a template image; performing a first Raman spectra focus screening on the sample to determine a first depth focus setting of the Raman spectroscopic laser in relation to the sample based on a Raman spectra scattering intensity from the first Raman spectra focus screening, a Raman spectra focus screening including measuring the Raman spectra scattering intensity at a range of different depth focus settings of the light beam emitted from the Raman spectroscopic laser; and performing a first Raman spectra test on the sample at the first depth focus setting.