The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 14, 2017
Filed:
Jan. 23, 2017
Qun LI, Newark, DE (US);
Sean Xiaolu Wang, Wilmington, DE (US);
Qun Li, Newark, DE (US);
Sean Xiaolu Wang, Wilmington, DE (US);
BWT Property, Inc., Newark, DE (US);
Abstract
This invention discloses a laser induced breakdown spectroscopy (LIBS) apparatus with automatic wavelength calibration. The LIBS apparatus comprises a database of pre-obtained LIBS spectra of standard calibration samples. When the LIBS spectrum of a target sample is acquired, a processor unit calculates a cross correlation between the LIBS spectrum of the calibration sample and the spectrum of the target sample in reference to a possible wavelength shift between the two spectra. The exact wavelength shift between the two spectra is found where the cross correlation reaches a maximum value. The wavelength shift of the target spectrum is then corrected through an interpolation procedure and the wavelength shift corrected spectrum is analyzed to obtain the composition information of the target sample.