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:
Dec. 09, 2003
Filed:
Mar. 28, 2002
Applicant:
Inventor:
Mark L. Plett, Redmond, WA (US);
Assignee:
Terabeam Corporation, Kirkland, WA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/32 ;
U.S. Cl.
CPC ...
G02B 5/32 ;
Abstract
A free space (FSO) receiver includes an illumination sensing unit with multiple illumination apertures. The illumination sensing unit is used in deriving alignment information from portion(s) of a received FSO signal that are incident on the illumination apertures. The FSO receiver provides this information to the FSO transmitter that transmitted the FSO signal so that the FSO transmitter can adjust the direction it is pointing. The illumination apertures can be formed in a holographic optical element on a single substrate. Further, transmission, reception, tracking and/or spotting scope apertures may be formed in the single substrate.