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. 27, 2004
Filed:
Oct. 26, 1999
Jenn-Tsair Tsai, Taipei Hsien, TW;
Mustek Systems Inc., Hsinchu, TW;
Abstract
In the method of adjusting scanner photoelectric module, a reference pattern is projected to the charge-coupled device through a lens for generating image signal corresponding to the charge-coupled device. The lens and the charge-coupled device perform adjustment in accordance with the obtained image signal to improve MTF value and the magnification (or zooming) ratio. This invention provides a block at each of the two sides of the scan width of the reference pattern and two sets of line patterns between the scan widths of the reference pattern. The two blocks (such as right triangle blocks) are increasing/decreasing in their width and are symmetrical, and have a side at the vertical scan direction, for determining the margins and the horizontal status of said scanner photoelectric module. The two sets of line patterns are vertical and inclined at the scan direction, respectively, for determining the MTF value of the scanner photoelectric module along the scan direction and the vertical scan direction.