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. 21, 2013
Filed:
Feb. 12, 2013
Illumina, Inc., San Diego, CA (US);
Dale Buermann, San Diego, CA (US);
Alexander P. Kindwall, Pleasanton, CA (US);
Illumina, Inc., San Diego, CA (US);
Abstract
A method for controlling focus of an optical system. The method includes providing a pair of incident light beams to a conjugate lens. The incident light beams are directed by the lens to converge toward a focal region. The method also includes reflecting the incident light beams with an object positioned proximate to the focal region. The reflected light beams return to and propagate through the lens. The method also includes detecting a phase of each of the reflected light beams and determining a degree-of-focus of the optical system with respect to the object by comparing the phases of the reflected light beams.