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. 29, 2009
Filed:
Oct. 27, 2006
Yu Tai, Chu-Nan, TW;
Chien-i Chen, Chu-Nan, TW;
Hai-hung Wen, Chu-Nan, TW;
Altus Technology Inc., Chu-Nan, Miao-Li Hsien, TW;
Abstract
A lens auto-focusing method in camera module testing includes the following steps: providing testing equipment including a range finder, a signal processor and a driving member; providing an imaged object (); providing an camera module including a lens module () and an image sensor, the view angle and the biggest value of the modulation transfer function of the lens module are both certain values, the image () of the imaged object is formed in the image sensor; the imaged object and the image formed thereby in the other side of the lens module are fixed; the imaged object and the image formed in the other side of the lens module are fixed; inputting an image distance tested by the range finder into the signal processor, the signal processor calculates a displacement for the driving member; the driving member drives the lens module to a focusing point.