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:
Jun. 25, 2002
Filed:
Nov. 23, 1999
Applicant:
Inventors:
Suzanne K. Rajchel, Wheaton, IL (US);
Michael G. Ressl, Western Springs, IL (US);
Assignee:
Vantageport, Inc., Western Springs, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01C 3/00 ;
U.S. Cl.
CPC ...
G01C 3/00 ;
Abstract
An optical system for measuring distance and for range-finding is provided. This single beam system uses a polarization selector and a retardation plate to take advantage of the polarization properties of light from a transmit source and of light reflected to a receiver. Another embodiment of the system uses the properties of certain types of transmit sources to further reduce the dimensions of the system. Methods for using the system are also provided.