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. 07, 1998
Filed:
Dec. 18, 1996
Chien-Chin Chan, Hsin-Chu Hsien, TW;
Umax Data Systems Inc., Hsinchu, TW;
Abstract
An opto-mechanical apparatus for moving and scanning in an optical system comprises a step motor, a timing belt, a first lead screw carrying a first optical assembly, and a second lead screw carrying a second optical assembly. Each of the lead screws has a spiral thread forming a lead path. The lead path of the second lead screw is twice as long as the lead path of the first lead screw. Each lead screw has a gear fastened to its one end. The timing belt connects the rotation axis of the step motor and the two gears on the lead screws. When the step motor rotates, the two gears are driven by the timing belt. The two lead screws are also rotated by the gears. The first optical assembly moves twice as fast as the second optical assembly because the two gears have identical radii but the second lead path is twice long. The different distances traveled by the two optical assemblies ensure that the optical system has a constant optical resolution while scanning.