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:
Jan. 15, 2019
Filed:
Aug. 22, 2014
The University of Queensland, St. Lucia, Queensland, AU;
University of Leeds, St. Lucia, Queensland, AU;
Aleksandar D. Rakic, Chapel Hill, AU;
Paul Dean, West Yorkshire, GB;
Alexander Giles Davies, West Yorkshire, GB;
Dragan Indjin, West Yorkshire, GB;
Edmund Harold Linfield, West Yorkshire, GB;
Stephen James Wilson, Camp Hill, AU;
Thomas Taimre, Pullenvale, AU;
Karl Bertling, Bridgeman Downs, AU;
Yah Leng Lim, Chapel Hill, AU;
The University of Queensland, St. Lucia, AU;
University of Leeds, St. Lucia, AU;
Abstract
A THz quantum cascade laser is used to investigate a target by directing a first beam of laser radiation from the laser at the target to thereby produce a second beam of laser radiation by interaction of the first beam with the target. Self-mixing of the first and second beams occurs within the laser and causes variations in a signal such as the operating voltage of the laser. An operating parameter of the laser that affects the interaction of the first beam with, the target is varied. The operating voltage is monitored and processed to determine phase and amplitude changes associated with material properties of the target. Consequently in one embodiment the invention provides for processing the variations in the signal to produce various images of the target.