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:
Jul. 18, 1995
Filed:
Apr. 29, 1994
Ronald D Esman, Burke, VA (US);
Alan D Kersey, Fairfax Station, VA (US);
Michael J Marrone, Severna Park, MD (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A sensor system includes a sensor head, an optical source, and a measurement apparatus. The sensor head includes a beamsplitter having first, second, third, and fourth ports, the beamsplitter being responsive to light selectively applied to the first, second and third ports for passing light of a first polarization state from the first port to the second port, for passing light of a second polarization state from the first port to the third port, for passing light of the second polarization state from the second port to the fourth port, and for passing light of the first polarization state from the third port to the fourth port. The optical source means provides light to the first port. The sensor head further includes a bidirectional polarimetric sensor responsive to polarized light output by the beamsplitter at the second and third ports and to an electromagnetic field applied to the polarimetric sensor for producing first polarized light at said third port and for producing second polarized light at said second port. The first and second polarized light have polarization states each of which varies as a function of the electromagnetic field and the polarization state of the light output by the beamsplitter at the other one of the second and third ports. The measurement means is responsive to light from the fourth port for producing an output signal indicative of the electromagnetic field strength.