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:
Jul. 29, 2003
Filed:
Sep. 12, 2001
Yao Hao Chang, Chung-Ho, TW;
Hon Hai Precision Ind. Co., Ltd., Taipei Hsien, TW;
Abstract
A variable optical attenuator ( ) includes a cover ( ), a housing ( ), an optical module ( ), a reciprocating means ( ), a filter ( ) and a fixer ( ). The filter has a varying optical density gradient and is attached to the reciprocating means. The reciprocating means includes a carrier ( ) mounted to a rotatable screw rod ( ) and a stabilizing mechanism ( ) mounted on the carrier. When the screw rod is rotated, the carrier with the filter mounted on it moves toward one side of the housing or another. The stabilizing mechanism contacts the housing to prevent the carrier and the filter from rotating with the screw rod. Optical signals coming from the input optical fiber ( ) pass through a collimator ( ), through the filter, and are reflected by the reflector ( ) to pass again through the filter and collimator for output in the output optical fiber ( ).