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:
Jun. 17, 2003
Filed:
Mar. 19, 2001
Jian J. Chen, Fremont, CA (US);
Jianhua Wang, Milpitas, CA (US);
Optiwork, Inc., Fremont, CA (US);
Abstract
A mechanically-adjustable variable optical attenuator includes a beam attenuator shaped as a concave quasi-cone. The beam attenuator has a sharp tip and a base, and can be rotationally symmetric with respect to a central axis extending between the tip and the base. The beam attenuator is positioned with its central axis perpendicular to the direction of the light beam to be attenuated. The extent of the beam attenuator obstructing the light beam is varied by moving the beam attenuator into and out of the light beam. The inwardly-curving, quasi-cone shape of the beam attenuator allows achieving a high resolution while limiting the beam attenuator size.