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:
Aug. 12, 2003
Filed:
Dec. 10, 2001
Samuel Mickan, Adelaide, AU;
Derek Abbott, Adelaide, AU;
Luminis PTY LTD, Adelaide, AU;
Abstract
A diagnostic apparatus including a terahertz generator taking the form of a femtosecond laser exciting either an optoelectric crystal of a photoconductive dipole antenna the terahertz radiation is directed onto a target preferably held close by or abutting an enclosure including a reflection receiving window and housing terahertz detector for detecting terahertz radiation. Preferably the terahertz radiation generator forms part of the receiving window. The enclosure has a modified atmosphere to permit ready transmission of terahertz radiation. A beam splitter is positioned between the laser and the terahertz generator to split off a probe laser beam from the terahertz inducing laser radiation which is also directed to the detector means. The output from the detector being determined by the amplitude of that part of the reflected teraherz radiation wave coaligned with the probe laser at the detector. A delay is positioned in the probe laser path to altering the length of the probe laser path over terahertz subwavelength distances so that different parts of the terahertz wave form can be interrogated by the probe laser to thereby ascertain the shape and dimensions of the reflected terahertz radiation.