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:
Mar. 31, 1981
Filed:
Jul. 30, 1979
James L Jernigan, Inyokern, CA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A target designation system is created by use of a dual-beam illumination bsystem of coherent light. One beam is shifted a discrete frequency level from the other beam. The beams diverge from the source until they overlap on the desired target. The difference in frequency when the beams overlap creates an interference pattern composed of moving fringes which scan across the target. Various receiver systems can be used to identify the scanning fringes and mark the target. In addition, without the use of a receiver subsystem, the illuminations subsystem can still be used as a ranging device which can be tuned to identify range to an object by adjustment of the beams until a maximum intensity moving fringe pattern is observed.