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:
Sep. 18, 2007
Filed:
Aug. 31, 2004
Haruaki Otsuki, Tsuchiura, JP;
Souichi Toyama, Ebina, JP;
Kenta Seki, Tsuchiura, JP;
Yaichi Okubo, Ebina, JP;
Daisuke Kitamura, Ebina, JP;
Haruaki Otsuki, Tsuchiura, JP;
Souichi Toyama, Ebina, JP;
Kenta Seki, Tsuchiura, JP;
Yaichi Okubo, Ebina, JP;
Daisuke Kitamura, Ebina, JP;
Hitachi Via Mechanics Ltd., Ebina-shi, JP;
Abstract
A optical scanner control method and a optical scanner capable of positioning a mirror at a high speed independently of a rocking angle, and a laser machining apparatus for irradiating a printed circuit board with a laser beam by use of the optical scanner to thereby perforate the printed circuit board. In order to operate an actuator for rocking the mirror based on a deviation of a current position from an commanded value, a change in gain of the actuator is measured in accordance with each rocking angle in advance, and the manipulated variable of the actuator is corrected to cancel the change in gain. Thus, the influence of the alteration of a torque constant in accordance with the rocking angle can be suppressed so that the response characteristic becomes uniform all over a scanning region, and the positioning speed can be improved.