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:
Apr. 24, 2007
Filed:
Jul. 10, 2003
Applicant:
Kristian Blidegn, Copenhagen, DK;
Inventor:
Kristian Blidegn, Copenhagen, DK;
Assignee:
Hymite A/S, Kgs. Lyngby, DK;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B 11/00 (2006.01); G01B 11/14 (2006.01); G02B 6/26 (2006.01); G02B 6/42 (2006.01); G01R 31/26 (2006.01); G03C 5/00 (2006.01); G03F 9/00 (2006.01); H01L 21/66 (2006.01);
U.S. Cl.
CPC ...
Abstract
A passive alignment technique is disclosed to facilitate accurate positioning of components of an optical assembly. In one aspect, a method includes directing light onto components of an optical assembly in which a first component includes a first pattern of marks with a first frequency and a second component includes a second pattern of marks with a second different frequency. An optical signal corresponding to the superposition of the first and second patterns is detected. Based on the detected optical signal, a determination may be made as to whether the first and second components are properly positioned with respect to one another.