Patent ID: 9255841
Filing Date: 2016-02-09
CPC Classification: G01J

Claim Text:
1. A system for sensing a spectroscopic signature of a sample, the system comprising: an array of quantum cascade lasers (QCLs) to emit an array of substantially parallel laser beams comprising lasers beams at different wavelengths; an array of collimating lenses, in optical communication with the array of QCLs, to substantially collimate the array of parallel laser beams; and a multipass absorption cell, in optical communication with the array of collimating lenses, to receive the array of parallel laser beams from the array of collimating lenses, to direct the array of parallel laser beams along multiple passes through a least a portion of the sample, and to emit the array of parallel laser beams after transmission through the at least a portion of the sample; and a detector, in optical communication with the multipass absorption cell, to detect at least a portion of the array of parallel laser beams so as to provide a signal representative of the spectroscopic signature of the sample.