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:
May. 31, 2005
Filed:
Aug. 14, 2002
Dan W. Youngner, Maple Grove, MN (US);
James F. Detry, Plymouth, MN (US);
J. David Zook, Golden Valley, MN (US);
Dan W. Youngner, Maple Grove, MN (US);
James F. Detry, Plymouth, MN (US);
J. David Zook, Golden Valley, MN (US);
Honeywell International Inc., Morristown, NJ (US);
Abstract
A frequency standard has a cell formed in a cavity of a substrate. The cell contains a metal alkali vapor. The substrate has an optical path that intersects the cell. A light source is supported by the substrate and supplies light through the first optical path to the cell, and a light detector is supported by the substrate and receives light through the second optical path from the cell. The sealed vapor-filled cell is surrounded by a vacuum cavity enclosure. Bridges between the cell and the substrate may be used to thermally isolate the cell in the cavity and allow closed loop temperature control of the cell.