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:
Mar. 13, 2007
Filed:
Jan. 05, 2004
Jau-jan Deng, Taipei, TW;
Guo-zen Chen, Taipei, TW;
I-lin Chu, Taipei, TW;
Ming-hua Wen, Taipei, TW;
San-woei Shyu, Taipei, TW;
Jau-Jan Deng, Taipei, TW;
Guo-Zen Chen, Taipei, TW;
I-Lin Chu, Taipei, TW;
Ming-Hua Wen, Taipei, TW;
San-Woei Shyu, Taipei, TW;
E-Pin Optical Industry Co., Ltd., Taipei, TW;
Abstract
A laser scanning unit mainly includes a semiconductor laser, a collimator, a micro electronic mechanic system (MEMS) oscillatory mirror, and an fθ lens or an f sin θ lens. The MEMS oscillatory mirror is disposed between the collimator and the fθ lens to replace a conventional rotary polygonal mirror for controlling a direction in which laser beams are projected from the oscillatory mirror to the fθ lens. With the MEMS oscillatory mirror, the cylindrical lens may be omitted from the laser scanning unit and noises produced by the polygonal mirror rotating at high speed may be avoided. Moreover, the MEMS oscillatory mirror allows bi-directional scanning to therefore enable increased scanning frequency, simplified structure, and improved scanning efficiency.