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. 20, 2005
Filed:
May. 28, 2004
Chihchung Chen, Taipei, TW;
Chengkuo Lee, Taipei, TW;
Chihchung Chen, Taipei, TW;
Chengkuo Lee, Taipei, TW;
Asian Pacific Microsystems, Inc., Hsinchu, TW;
Abstract
A variable optical attenuator for providing a new light attenuation mechanism based on using at least one of tilted mirrors to change and control the beam direction of reflected light beam toward output optical port in a two dimensional light path configuration is demonstrated to achieve the light attenuation in terms of changing and controlling the coupling loss among input optical port, reflective tilted mirrors, and output optical port. The tilted mirror is supported and connected by a suspended flexure spring at one side. This suspended spring is connected with tilted mirror at one side and is anchored on a substrate at the other side via a post (or a pivot). When the tilted mirror is driven by an actuator to generate movement including rotational mirror deflection and parallel mirror shifted displacement, the reflected light beam path is changed according to the particular mirror positions. The attenuation value is modified and controlled by the coupled light of reflected light beam to output port. The structure and materials of variable optical attenuator is designed and chose to be robust to environment mechanical and thermal noise.